{"product_id":"udp3305c","title":"UDP3305C 3Ch 315W 30V\/5A Programmable Linear DC Power Supply","description":"\u003ch1\u003eUNI-T UDP3305C 3Ch Advanced Series Programmable Linear DC Power Supply\u003c\/h1\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eThe UDP3305C is the higher-current sibling of the UDP3303C — same three-channel SCPI-programmable linear platform, with CH1 and CH2 raised to 0–30V at 0–5A for benches that need 5A on a rail without giving up clean linear output. Total output is 315W; CH3 cycles through 1.8V \/ 2.5V \/ 3.3V \/ 5V at 3.2A for digital subsystem powering. Linear regulation keeps output ripple under 1 mVrms.\u003c\/p\u003e\n  \u003cp\u003eCH1 and CH2 combine in series for up to 60V or in parallel for up to 10A — useful when the workload occasionally exceeds what a single 5A rail can deliver. SCPI over USB-Device or RS-232 lets the supply join an automated test rig at the same control reach as the UDP3303C; five preset storage groups (M1–M5) and a Digital I\/O hardware ON\/OFF pin pair complete the programmable workflow set. For higher-power R\u0026amp;D bench work, characterization sweeps in small-team test labs, and industrial maintenance benches where 5A on a programmable linear earns its place, the UDP3305C is the right point in the UDP3000C family.\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\u003eThree Channels, 315W Total — SCPI Programmable\u003c\/strong\u003e — CH1 and CH2: 0–30V \/ 0–5A adjustable. CH3: switchable 1.8V \/ 2.5V \/ 3.3V \/ 5V at 3.2A. SCPI control over USB-Device or RS-232.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5A Per Adjustable Channel\u003c\/strong\u003e — Headroom for higher-power loads where the UDP3303C runs short: small motors, transmitter front-ends, higher-current LED drive, parallel-mode 10A loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCH1+CH2 Parallel Mode to 10A\u003c\/strong\u003e — Software-routed parallel combination delivers up to 10A on a single output without external wiring between channel terminals. No jumper cables, no shorting bars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCH3 Logic-Rail Selector\u003c\/strong\u003e — Single front-panel button cycles CH3 through 1.8V \/ 2.5V \/ 3.3V \/ 5V at 3.2A. CMOS, microcontroller cores, legacy TTL, USB-class — covered without sacrificing CH1\/CH2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinear Topology, ≤1 mVrms Ripple\u003c\/strong\u003e — Load regulation tightens to ≤0.01% + 3 mV at currents ≤3A and ≤0.02% + 5 mV above 3A. The slightly relaxed spec at higher currents reflects pass-element behavior, not a soft cutoff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming Accuracy ≤0.1% + 30 mV\u003c\/strong\u003e — Voltage programming accuracy ≤0.1% + 30 mV; current programming accuracy ≤0.5% + 2 mA across the full 5A range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 mV \/ 1 mA Resolution\u003c\/strong\u003e — Four-digit voltage and current display per channel on EBTN LCD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Mode to 60V\u003c\/strong\u003e — Front-panel button combines CH1+CH2 in series for up to 60V output. SCPI exposes the same mode for automated test integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOVP \/ OCP \/ OTP Protection\u003c\/strong\u003e — Configurable per-channel thresholds, plus over-temperature shutdown and keypad lock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive Preset Storage Groups\u003c\/strong\u003e — M1–M5 store full instrument states for fast bench setup. Shutdown memory restores last settings on power-up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront-Panel 5V\/2A USB Charging Port (CH4)\u003c\/strong\u003e — Independent 5V\/2A USB-A charging output. Charging output only — the data interfaces are USB-Device and RS-232 on the back panel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eDetailed Features\u003c\/h2\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003ch3\u003e5 Amps Per Channel — Real Bench Workhorse\u003c\/h3\u003e\n\u003cp\u003eThe UDP3305C is the supply you reach for when 3A on the UDP3303C runs out before the workload does. Class-AB audio amplifiers, motor drivers in characterization, RF transmitter front-ends in alignment, prototype boards with high-current LED arrays — all live above the 3A line. Two adjustable channels at 0–30V\/5A give you headroom on each rail; the parallel-mode 10A combination on CH1+CH2 handles the genuinely current-hungry workloads where bench power is the constraint. Load regulation tightens to ≤0.01% + 3 mV at currents up to 3A and ≤0.02% + 5 mV above 3A — the slightly relaxed spec at higher currents reflects pass-element behavior, not a soft cutoff. Linear topology, ≤1 mVrms ripple, full SCPI control across the entire 5A range.\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-udp3305c-h3-1\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/udp3000_display.jpg\" alt=\"UNI-T UDP3305C — 5 amps per channel\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eUNI-T UDP3305C — 5 amps per channel\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca id=\"lb-udp3305c-h3-1\" 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\/udp3000_display.jpg\" alt=\"UNI-T UDP3305C — 5 amps per channel\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eUNI-T UDP3305C — 5 amps per channel\u003c\/span\u003e\n\u003c\/a\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003cdiv class=\"product-row\"\u003e\n\u003cdiv class=\"product-box product-left\"\u003e\n\u003cfigure class=\"product-figure\"\u003e\n\u003ca href=\"#lb-udp3305c-h3-2\" class=\"product-thumb-link\"\u003e\n\u003cimg src=\"https:\/\/res.cloudinary.com\/uni-t\/image\/upload\/udp3000-buttons.jpg\" alt=\"UNI-T UDP3305C — series, parallel, and tracking\" class=\"product-image-thumb\"\u003e\n\u003c\/a\u003e\n\u003cfigcaption class=\"product-figcaption\"\u003eUNI-T UDP3305C — series, parallel, and tracking\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-box product-right\"\u003e\n\u003ch3\u003eSeries, Parallel, and Tracking — One Button\u003c\/h3\u003e\n\u003cp\u003eCH1 and CH2 combine in series for up to 60V output, in parallel for up to 10A, and in master-slave tracking for matched-rail testing — all from front-panel buttons, no jumper cables, no shorting bars, no risk of miswiring. Series mode pairs CH1+ and CH2− as the live output terminals; parallel mode pairs CH1+\/CH2+ as the high-current positive output. SCPI exposes the same modes for automated test integration. For benches that occasionally need a 60V rail for a higher-voltage prototype or a 10A rail for a current-hungry load, the configurability is built into the platform — no second supply required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ca id=\"lb-udp3305c-h3-2\" 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\/udp3000-buttons.jpg\" alt=\"UNI-T UDP3305C — series, parallel, and tracking\"\u003e\n\u003cspan class=\"lightbox-caption\"\u003eUNI-T UDP3305C — series, parallel, and tracking\u003c\/span\u003e\n\u003c\/a\u003e\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\u003eHigher-Power R\u0026amp;D Bench\u003c\/h3\u003e\n\u003cp\u003e5A per adjustable channel handles class-AB amplifier rails, motor driver characterization, RF transmitter alignment, and any prototype where 3A on the lower-tier supply runs short. SCPI control scripts the test sequence; ripple under 1 mVrms keeps supply noise out of the measurement at currents up to 5A.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eIndustrial Maintenance \u0026amp; Service\u003c\/h3\u003e\n\u003cp\u003eProgrammable linear bench supply at 5A current capability for board-level service work and equipment test. SCPI over RS-232 integrates into existing maintenance shop test fixtures; OVP\/OCP per-channel protection survives the connection mistakes that happen at 6am.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eSmall-Team Test Lab Characterization\u003c\/h3\u003e\n\u003cp\u003eSCPI over USB-Device and RS-232 integrates into LabVIEW, Python-VISA, and shell-driven test frameworks. Five preset groups speed bench setup between projects. Parallel-mode 10A handles high-current characterization the smaller-current platforms in this family can't source.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-app-card\"\u003e\n\u003ch3\u003eTeaching Labs \u0026amp; Higher-Power Curriculum\u003c\/h3\u003e\n\u003cp\u003ePer-station cost that lets a 20-bench classroom stay inside budget — with the current capability for higher-power lab exercises (motor drive, power amplifiers, LED arrays).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\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\"\u003eWhat's the difference between the UDP3303C and the UDP3305C?\u003c\/p\u003e\n\u003cp\u003eOutput current. UDP3303C delivers 0–3A on CH1 and CH2 (195W total). UDP3305C delivers 0–5A on CH1 and CH2 (315W total). Voltage range, CH3 logic-rail selector, charging port, interfaces, SCPI command set, and feature set are otherwise identical. Choose UDP3303C if 3A is enough; choose UDP3305C when you need to source above 3A on a single rail or up to 10A in parallel mode.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eDoes the UDP3305C have LAN?\u003c\/p\u003e\n\u003cp\u003eNo. The UDP3305C's data interfaces are USB-Device and RS-232 only. If your workflow needs LAN (with LXI\/web interface), the UDP3000S series adds it on the same linear-PSU platform with up to 4 channels. The Digital I\/O pin pair on the back panel handles hardware ON\/OFF only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eHow well does the supply hold regulation above 3A?\u003c\/p\u003e\n\u003cp\u003eLoad regulation is specified as ≤0.01% + 3 mV at currents up to 3A, and ≤0.02% + 5 mV above 3A. The supply is designed for clean operation across the full 5A range; the slightly relaxed spec above 3A reflects the higher-current pass-element behavior, not a soft cutoff.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003cp class=\"product-faq-question\"\u003eCan CH1 and CH2 deliver 10A combined?\u003c\/p\u003e\n\u003cp\u003eYes — the parallel-mode combination of CH1+CH2 delivers up to 10A on a single output. Engage parallel mode from the front panel (PARA button) or via SCPI; the front-panel jacks repurpose so CH1+ and CH2+ share the high-current positive terminal. Both channels remain at the same voltage setpoint (set on CH1).\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 UDP3305C?\u003c\/p\u003e\n\u003cp\u003eThe UDP3305C ships with the instrument, power cord, USB communication cable (UT-D14), RS-232 communication line, alligator clip test leads, English user manual 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":46699352097052,"sku":"181400100029X","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/9208\/0924\/files\/UDP3305C_Cables.jpg?v=1720807333","url":"https:\/\/uni-trendus.com\/products\/udp3305c","provider":"Uni-Trend US","version":"1.0","type":"link"}