{"product_id":"udp4303s","title":"UDP4303S 4Ch 297W 32V\/10A Programmable Linear DC Power Supply","description":"\u003ch1\u003eUNI-T UDP4303S Precision Linear DC Power Supply\u003c\/h1\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe UNI-T UDP4303S is a 4-channel, 297W precision programmable linear DC power supply with fully isolated outputs: two 0–32V\/3A channels, one 0–15V\/3A channel, and one 0–6V\/10A channel. The linear topology delivers exceptionally clean output with ripple under 350 µVrms — critical for sensitive analog circuits, precision sensor development, and any application where switching noise is unacceptable.\u003c\/p\u003e\n\u003cp\u003eWith 8 kSa\/s output sampling across all four channels, 1 µA current resolution, 1 ms programming time resolution, and a built-in waveform display, the UDP4303S provides real-time visibility into transient load behavior that competing supplies simply cannot match. Series\/parallel\/tracking modes, a controllable bleeder circuit, and comprehensive OVP\/OCP\/OTP protection round out a professional-grade instrument (3 years standard + 2 with free registration = 5 years total).\u003c\/p\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eAcross the Design. Debug. Deploy.™ Lifecycle\u003c\/h2\u003e\n\u003cp\u003eAcross the design-debug-deploy lifecycle, the UDP4303S earns its bench position: \u003cstrong\u003eDesign.\u003c\/strong\u003e Four isolated channels source the rails and biases that an analog or precision-sensor design needs from first prototype, with linear topology that doesn’t inject switching noise into the measurement. \u003cstrong\u003eDebug.\u003c\/strong\u003e 8 kSa\/s output sampling and 1 µA current resolution expose transients and sleep-mode draws that lower-bandwidth supplies average away. \u003cstrong\u003eDeploy.\u003c\/strong\u003e List-mode profiles and SCPI\/LXI automation drive production characterization runs from the same instrument. Affordability meets precision — design, debug, deploy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"product-key-features\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Channel Fully Isolated Linear Output (297W)\u003c\/strong\u003e — CH1 \u0026amp; CH2: 0–32V\/3A, CH3: 0–15V\/3A, CH4: 0–6V\/10A. Complete electrical isolation between all channels eliminates crosstalk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Low Ripple \u0026amp; Noise\u003c\/strong\u003e — \u0026lt;350 µVrms\/2 mVpp output ripple (20 Hz–20 MHz). Linear topology means zero switching artifacts in the output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 µA Current Resolution\u003c\/strong\u003e — Low-current measurement mode across all four channels resolves down to 1 µA for precision IoT, sensor, and battery drain testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 kSa\/s Output Sampling\u003c\/strong\u003e — Real-time voltage\/current\/power waveform display on all channels captures transient load behavior and power-up sequences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 ms Programming Time Resolution\u003c\/strong\u003e — Generate precise arbitrary waveforms with 512-group list output. Built-in waveform templates (sine, ramp, pulse) for fast setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\/Parallel\/Tracking Modes\u003c\/strong\u003e — One-touch CH1+CH2 combination: up to 64V in series or 6A in parallel with no external wiring. Tracking mode synchronizes channels automatically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControllable Bleeder Circuit\u003c\/strong\u003e — Active discharge pulls output to zero rapidly when disabled. Turn off for battery testing to prevent unintended discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfigurable OCP Response (\u0026lt;3 ms)\u003c\/strong\u003e — Adjustable over-current protection delay from 0–10 seconds with fastest response under 3 ms. \"Setting Change\" mode prevents false triggers at power-on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Wire Remote Sense (All Channels)\u003c\/strong\u003e — Compensates for voltage drop in test leads on all four channels, with built-in sense protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB, LAN, RS-232, Digital I\/O\u003c\/strong\u003e — SCPI remote control, web browser interface, and digital trigger I\/O for automated test integration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003ePrecision That Sets It Apart\u003c\/h2\u003e\n  \u003cdiv class=\"product-row\"\u003e\n    \u003cdiv class=\"product-box product-left\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFour Independent Channels (CH1 \u0026amp; CH2: 32V\/3A, CH3: 15V\/3A, CH4: 6V\/10A)\u003c\/strong\u003e\u003cbr\u003ePower multi-rail embedded designs from a single instrument — digital core, analog front-end, I\/O, and sensor power simultaneously. No external wiring needed for series\/parallel combinations.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e1 µA Resolution Across All Channels\u003c\/strong\u003e\u003cbr\u003eThe low-current measurement mode samples down to 20 mA with 1 µA resolution on all four channels — measure sleep-mode current draw, standby leakage, and IoT sensor consumption directly from the power supply.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e8 kSa\/s Waveform Capture\u003c\/strong\u003e\u003cbr\u003eSee exactly what your load is doing in real time. The built-in waveform display captures voltage, current, and power transients across all channels simultaneously — no external oscilloscope needed for power behavior analysis.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"product-box product-right\"\u003e\n      \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-highres\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_High_Resolution.png\" alt=\"UDP4303S 1µA current resolution display\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003e1 µA current resolution — 1000× finer than previous-generation supplies\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-highres\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_High_Resolution.png\" alt=\"UDP4303S 1µA current resolution\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003e1 µA current resolution — 1000× finer than previous-generation supplies\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eReal-Time Output Waveform Display\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eThe UDP4303S puts a built-in waveform analyzer on every channel. At 8 kSa\/s across all four channels, you can observe voltage, current, and power behavior in real time — capturing inrush currents, transient load steps, and power-up sequences without connecting a separate oscilloscope. The waveform view displays min\/max\/offset values and supports adjustable time\/div and amplitude\/div scaling for detailed analysis.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-waveform\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_8ks_Sample_Rate.jpg\" alt=\"UDP4303S 8kSa\/s waveform display\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003e8 kSa\/s waveform display — voltage, current, and power on every channel\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-waveform\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_8ks_Sample_Rate.jpg\" alt=\"UDP4303S waveform display\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003e8 kSa\/s waveform display — voltage, current, and power on every channel\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003e1 ms Arbitrary Waveform Programming\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eProgram up to 512 voltage\/current\/time groups with 1 ms dwell time resolution — 100× finer than previous-generation supplies. Built-in waveform templates (sine, ramp, triangle, pulse, and more) let you create complex output profiles in seconds. Every channel, including series and parallel modes, supports list output for automated test sequences, battery charge simulation, and device stress testing.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-features\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_Features.gif\" alt=\"UDP4303S list mode and waveform programming\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003e512-group list output with built-in waveform templates\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-features\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_Features.gif\" alt=\"UDP4303S list mode and waveform programming\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003e512-group list output with built-in waveform templates\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eProtect Your DUT with Configurable OCP\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eThe UDP4303S provides adjustable over-current protection with the fastest response time under 3 ms — fast enough to protect sensitive components from damage. The configurable OCP delay (0–10 seconds) prevents false triggers during power-on inrush. \"Setting Change\" mode detects overcurrent events only after the programmed delay, while \"Anyway\" mode monitors continuously. Combined with OVP and OTP, every channel is fully protected.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-ocp\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_OCP_Settings.png\" alt=\"UDP4303S adjustable OCP settings\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eConfigurable OCP with \u0026lt;3 ms fastest response time\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-ocp\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_OCP_Settings.png\" alt=\"UDP4303S OCP settings\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eConfigurable OCP with \u0026lt;3 ms fastest response time\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eSix Display Styles\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eThe 4.3-inch color LCD offers six distinct display layouts — from a four-channel overview showing voltage, current, and power simultaneously, to a single-channel focused view with large digits for across-the-room readability. Choose the view that matches your workflow and switch between them instantly.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-displays\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062901\/UDP4303S_Display_Styles.gif\" alt=\"UDP4303S six display styles\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eSix display styles — from 4-channel overview to single-channel detail\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-displays\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062901\/UDP4303S_Display_Styles.gif\" alt=\"UDP4303S display styles\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eSix display styles — from 4-channel overview to single-channel detail\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eSeries \u0026amp; Parallel in One Touch\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eCombine CH1 and CH2 through the front-panel menu — no external wiring needed. Series mode delivers up to 64V, parallel mode provides up to 6A, all with the same regulation performance and protection features as independent operation. Channel tracking keeps CH1 and CH2 synchronized automatically when you need matched outputs.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-serpar\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062894\/UDP4303S_Parallel_Series.gif\" alt=\"UDP4303S series and parallel operation\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eOne-touch series (64V) and parallel (6A) operation\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-serpar\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062894\/UDP4303S_Parallel_Series.gif\" alt=\"UDP4303S series and parallel\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eOne-touch series (64V) and parallel (6A) operation\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eControllable Bleeder Circuit\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eWhen you turn off a channel output, the controllable bleeder circuit rapidly discharges the output to zero — preventing residual voltage from reaching sensitive DUTs. For battery testing, turn the bleeder off to prevent the supply from draining the battery when the output is disabled. This flexibility makes the UDP4303S equally suited for both powered-circuit development and battery characterization.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-bleeder\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_Bleeder_Circuit.png\" alt=\"UDP4303S bleeder circuit control\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eControllable bleeder circuit — on for fast discharge, off for battery testing\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-bleeder\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_Bleeder_Circuit.png\" alt=\"UDP4303S bleeder circuit\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eControllable bleeder circuit — on for fast discharge, off for battery testing\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFull-Channel Remote Sense with Protection\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eAll four channels support 4-wire remote sensing through rear-panel terminals, compensating for voltage drop in test leads to ensure the DUT sees exactly the programmed voltage. Unlike competing supplies, the UDP4303S includes sense line protection on all channels — guarding against reverse connection and overvoltage on the sense terminals.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-sense\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062896\/UDP4303S_Remote_Compensation.jpg\" alt=\"UDP4303S remote sense terminals\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003e4-wire remote sense on all channels with sense protection\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-sense\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062896\/UDP4303S_Remote_Compensation.jpg\" alt=\"UDP4303S remote sense\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003e4-wire remote sense on all channels with sense protection\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eComplete Data Management\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eThe built-in recorder captures voltage, current, and power data from all channels (including series and parallel modes) to a USB flash drive. Store up to 10 status files, 10 list files, and 10 delayer files locally, plus 5 quick-access presets for your most common configurations. Export everything via USB for analysis on your PC.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-storage\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062898\/UDP4303S_Storage.png\" alt=\"UDP4303S storage and presets\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eLocal storage, presets, and USB export for complete data management\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-storage\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062898\/UDP4303S_Storage.png\" alt=\"UDP4303S storage\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eLocal storage, presets, and USB export for complete data management\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFull Channel Isolation\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eAll four channels are fully electrically isolated from each other and from the communication interfaces. This means zero crosstalk between channels, freedom to connect outputs in any ground configuration, and safe series\/parallel combinations without worrying about ground loops or interference.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-isolation\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_Isolation.png\" alt=\"UDP4303S 4-channel isolation\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eFour-channel full isolation — no crosstalk, safe series\/parallel connections\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-isolation\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062893\/UDP4303S_Isolation.png\" alt=\"UDP4303S isolation\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eFour-channel full isolation — no crosstalk, safe series\/parallel connections\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eRear Panel Connectivity\u003c\/h2\u003e\n    \u003cdiv class=\"product-row\"\u003e\n      \u003cdiv class=\"product-box product-left\"\u003e\n        \u003cp\u003eThe rear panel provides output terminals and remote sense connections for all four channels, plus RS-232, USB Device, LAN, and a 4-line Digital I\/O port for trigger input\/output. The built-in web server lets you monitor and control the UDP4303S from any browser on your network — no dedicated software required. SCPI command support ensures compatibility with existing automated test frameworks.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"product-box product-right\"\u003e\n        \u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp4303s-rear\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_Back_Panel.jpg\" alt=\"UDP4303S rear panel\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eRear panel — RS-232, USB, LAN, Digital I\/O, and output\/sense terminals for all channels\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003ca id=\"lb-udp4303s-rear\" href=\"#_\" class=\"product-lightbox\"\u003e\n\u003cspan class=\"lightbox-close\"\u003e×\u003c\/span\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/v1728062900\/UDP4303S_Back_Panel.jpg\" alt=\"UDP4303S rear panel\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eRear panel — RS-232, USB, LAN, Digital I\/O, and output\/sense terminals for all channels\u003c\/span\u003e\n\u003c\/a\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cdiv class=\"product-app-grid\"\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eAnalog \u0026amp; Mixed-Signal Development\u003c\/h3\u003e\n\u003cp\u003eLinear output with sub-350 µVrms ripple for op-amp circuits, precision ADC\/DAC testing, and low-noise signal chain development. Four isolated channels power multi-rail designs from one instrument — digital core, analog front-end, I\/O, and sensor rails simultaneously.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eIoT \u0026amp; Battery Drain Analysis\u003c\/h3\u003e\n\u003cp\u003e1 µA current resolution on all channels measures sleep-mode consumption, standby leakage, and active-mode transitions. 8 kSa\/s sampling captures fast wake-up current spikes. The controllable bleeder circuit prevents unintended battery discharge during characterization.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eEmbedded System Prototyping\u003c\/h3\u003e\n\u003cp\u003eIndependent isolated channels provide separate power rails with 1 ms programming resolution for power-up sequencing tests. 8 kSa\/s waveform monitoring shows real-time transient current demands during boot and operational state changes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eAutomated Production Test\u003c\/h3\u003e\n\u003cp\u003eSCPI over USB\/LAN\/RS-232 integrates into automated test systems. 512-group list output with 1 ms timing runs complex test profiles. Digital I\/O trigger input\/output coordinates with external equipment. Web server enables remote monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eWhy choose a linear power supply over switching?\u003c\/p\u003e\n\u003cp\u003eLinear supplies produce fundamentally cleaner output — no switching frequency harmonics, no EMI, and significantly lower ripple. For precision analog circuits, sensitive sensors, audio applications, and any measurement where µV-level noise matters, the difference is measurable. The tradeoff is lower efficiency and more heat, but for bench power at these power levels, that's typically acceptable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eHow does the 8 kSa\/s sampling compare to other bench supplies?\u003c\/p\u003e\n\u003cp\u003eMost bench power supplies sample at 4 Sa\/s or less — you see averaged readings with no visibility into transients. At 8 kSa\/s across all four channels, the UDP4303S captures fast current spikes, inrush events, and load transients in real time on the built-in display. This is 2,000× faster than previous-generation supplies and eliminates the need for an external oscilloscope in many power characterization tasks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eCan I use the UDP4303S for battery drain testing?\u003c\/p\u003e\n\u003cp\u003eYes — this is one of its strongest applications. The 1 µA current resolution on all channels captures sleep-mode consumption accurately. The controllable bleeder circuit is key: turn it off during battery testing so the supply doesn't drain the battery when the output is disabled. The 8 kSa\/s sampling captures fast wake-up transients that lower-speed supplies miss entirely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eWhat interfaces does the UDP4303S support for remote control?\u003c\/p\u003e\n\u003cp\u003eUSB Device, LAN (with built-in web server), RS-232, and a 4-line Digital I\/O port for trigger input\/output. All interfaces support SCPI commands. The web server provides browser-based control from any device on your network without installing dedicated software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eWhat's included with the UDP4303S?\u003c\/p\u003e\n\u003cp\u003eThe UDP4303S ships with the instrument, power cord, USB data cable, 5-pin plug (3.81mm), two 8-pin plugs (5.08mm), factory calibration report Ships from authorized US dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"UNI-T","offers":[{"title":"Default Title","offer_id":49094223069468,"sku":"181400100195X","price":1399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UDP4303S_1_sq.jpg?v=1723076135","url":"https:\/\/uni-trendus.com\/products\/udp4303s","provider":"Uni-Trend US","version":"1.0","type":"link"}