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UTP3313TFL-II

1Ch 90W 30V/3A Linear DC Power Supply

$79.00
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35 in stock

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1-channel W linear DC power supply rated to 30V/3A. Dependable bench supply for engineering labs, service, and production testing.

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UNI-T UTP3313TFL-II 1Ch Linear DC Power Supply

Overview

The UTP3313TFL-II is a single-channel linear bench supply at the size, weight, and price point that makes sense for the bench it's actually going to live on. UNI-T calls it "an economical benchtop tool for DIY electronics hobbyists, electronics manufacturing and testing" — which is the most accurate one-line description we can offer. 90W of linear DC at 0–30V / 0–3A, in a footprint of 105 × 165 × 249 mm and a 3 kg net weight.

A four-digit LED display reads voltage and current at 10 mV / 1 mA resolution per channel. Auto CV/CC crossover with current limit protection handles unknown loads safely. No firmware, no network port, no PC software stack. Plug in, set the rail, run the bench.

Key Features

  • Single-Channel, 90W Linear Output — 0–30V / 0–3A from a linear regulator. Clean, low-ripple output (≤1 mVrms) suitable for analog work, sensor circuits, and any prototyping where switching noise is unwelcome.
  • Four-Digit LED Display, 10 mV / 1 mA — High-resolution voltage and current readouts. Set the rail accurately; see what the load is actually drawing.
  • Auto CV/CC Crossover with Current Limit Protection — The supply transitions automatically between constant-voltage and constant-current operation when the load steps. Protects the DUT during fault conditions and the supply during overload.
  • Compact Footprint, Light Weight — 105 × 165 × 249 mm, 3 kg. Fits next to a scope on a crowded bench, lifts with one hand, packs into a service van without rearranging the back.
  • Set-Point Programming Accuracy — <0.5% + 20 mV on voltage, <0.5% + 5 mA on current — published set-point accuracy that lets you trust the dial reading for precision work.
  • Knob-and-Button Operation — No firmware to update, no PC software to install, no LAN port to configure. Front-panel only.

The Bench Supply Sized for the Bench It's Actually On

Most three-channel bench supplies are 8–10 kg in a 260+ mm-wide chassis — perfectly reasonable on a permanent lab bench, considerably less reasonable on a hobbyist workbench, a maker space's shared station, or a service tech's mobile cart. The UTP3313TFL-II is what UNI-T's product line offers when one channel is enough and shelf space isn't free.

For DIY electronics, kit assembly, board-level repair work, basic instructional setups, and second-supply duty next to a multi-channel main supply, the value math here is clean. 90W of linear DC at 10 mV / 1 mA resolution, at a price the bench-supply line's three-channel models can't approach. When you only need one rail, you only pay for one rail.

Applications

DIY Electronics & Hobbyist Workshops

UNI-T's own datasheet positions this supply for "DIY electronics hobbyists, electronics manufacturing and testing." Single-channel linear DC, 10 mV / 1 mA precision, and a footprint that doesn't dominate the bench.

Teaching Labs & Trade Schools

One supply per station at a per-station cost that lets a 30-bench classroom stay in budget. Knob-and-button operation matches the curriculum-relevant skill: students learn measurement, not menu navigation. Compact footprint leaves bench space for the scope and the DMM.

Service & Repair

Reliable single-rail bench supply for board-level service, kit testing, and small-circuit work. CV/CC auto crossover handles unknown loads safely. Small enough to live on a service cart.

Second-Rail Bench Companion

When your main bench supply is occupied with the primary DUT, the UTP3313TFL-II handles auxiliary rails — bias supplies for active probes, separate logic rails for adapter boards, or quick test setups that don't justify reconfiguring the main supply.

Frequently Asked Questions

Does the UTP3313TFL-II have USB or SCPI?

No. The UTP3313TFL-II is a fully analog, knob-and-button bench supply — no USB data interface, no LAN, no SCPI command set, no PC software. The "Programming accuracy" specification on the datasheet refers to set-point accuracy (how close the actual output is to the dial reading), not remote programmability. If your workflow needs SCPI control, the programmable counterparts in the UNI-T linear PSU family are the UDP3303C and UDP3305C (USB + RS-232) and the UDP3000S series (USB + LAN + LXI).

What's the difference between the UTP3313TFL-II and the UTP3315TFL-II?

Output current. UTP3313TFL-II delivers 0–3A (90W total). UTP3315TFL-II delivers 0–5A (150W total). Voltage range, display, regulation specs, and physical dimensions are otherwise identical between the two. The 5A model has a slightly relaxed ripple spec (≤2 mVrms vs ≤1 mVrms) reflecting the higher-current rectifier stage.

Why a linear supply instead of switching?

Linear topology produces fundamentally cleaner output — no switching frequency, no harmonic spurs, ripple under 1 mVrms. For analog bench work, audio circuits, low-noise sensor development, and any precision measurement where supply noise shows up in the result, the difference is measurable. The trade-off is lower efficiency and more heat, which at 90W in a 3 kg chassis is not a meaningful constraint.

What's included with the UTP3313TFL-II?

The UTP3313TFL-II ships with the instrument, an international standard power cord, test output line Ships from authorized US dealer.

Warranty

This instrument is backed by UNI-T's 3+2 Year Warranty — 3 years of standard coverage, plus 2 additional years free when you register your product. That's 5 years of total protection at no extra cost.

The warranty covers manufacturing defects and component failures under normal use conditions. UNI-T instruments are built for professional daily use, and our warranty reflects that commitment to long-term reliability.