The UTP3305 is a 335W three-channel linear bench supply for benches that need higher current than a 3A supply provides without giving up clean linear output. Two adjustable channels deliver 0–32V at 0–5A; a third channel provides a fixed 5V at 3A for logic-level power. Knobs, banana jacks, OVP/OCP via current-limit protection, and a front panel a first-year student gets back to default settings in under 30 seconds.
Linear regulation keeps output ripple under 1mVrms — no switching artifacts, no EMI signature competing with the circuit you're actually trying to characterize. CH1 and CH2 combine in series (up to 64V) or parallel (up to 10A), and a master-slave tracking mode keeps CH1 and CH2 synchronized when matched rails are needed for dual-supply analog work.
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Three Channels, 335W Total — CH1 and CH2: 0–32V / 0–5A adjustable. CH3: fixed 5V / 3A for logic-level power.
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Linear Topology, ≤1 mVrms Ripple — Clean DC output with no switching frequency, no harmonic spurs, and load regulation of CV ≤1×10⁻⁴ + 3 mV.
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Auto CV/CC Crossover with Current Limit Protection — The supply transitions automatically between constant-voltage and constant-current operation when the load steps, protecting both the DUT and the supply.
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Series and Parallel Modes — Combine CH1+CH2 for up to 64V series or 10A parallel — front-panel selectable, no external wiring.
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CH1/CH2 Master-Slave Tracking — Tracking mode synchronizes CH1 and CH2 for matched-rail testing (op-amp ±supplies, balanced analog stages, dual-supply mixed-signal designs).
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3-Bit Voltage and Current Dual Display — Independent voltage and current readouts per channel. No menus, no hidden settings — what you see is what the channel is doing.
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Output ON/OFF Control — Front-panel master output button keeps you in command of when current actually leaves the supply.
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Knob-and-Button Operation — No firmware to update, no PC software to install, no LAN port to configure. Front-panel only — designed to behave the same way on day one and year five.
Bench Power That Stays Out of the Way
The UTP3305 is the supply you put on a bench when the day's work is upstream of the power supply — circuit prototyping, board-level service, instructional labs where the lesson is signals or amplifiers, not procurement of a programmable instrument. The 5A current capability handles the higher-power loads where the UTP3303 runs out of headroom: small motors, transmitter front-ends, higher-current LED drive circuits, and parallel-mode 10A loads where two channels combine for current-hungry work.
For teaching labs and trade-school programs running 10–30 stations, this is the operational pitch: every student gets the same instrument with the same workflow, every shift. For service shops and small-team R&D benches, it's the supply you reach for when you don't want to think about the supply.
Applications
Teaching Labs & Trade Schools
Per-station cost that lets a 20-bench classroom stay inside budget, with 5A current handling the higher-power lab exercises (motor drive, power amplifiers, LED arrays).
Analog Bench Development
Dual 0–32V / 5A adjustable channels with master-slave tracking power op-amp ±supplies, audio amplifiers, and balanced analog stages with current headroom for class-AB and high-bias designs. Ripple under 1 mVrms keeps supply noise out of the measurement.
Service & Repair
Reliable bench supply for board-level service work where the device under test is a higher-current load — small motor drives, switch-mode supplies under test, automotive electronics. CV/CC auto crossover handles unknown loads safely.
Maker & Hobbyist Workshops
Three channels of clean linear power at a price point that makes sense for a workshop, with the current to drive higher-power projects: amateur radio rigs, EV-conversion bench testing, robotics prototyping. No software stack to maintain.
