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Rectangular bench power supply, dark metal case, front panel with display and knob

Matrix

Matrix WPS300S-30-20 30V 20A 300W server power supply

SKU CH-SMR1-T7KKN

Programmable DC bench supply delivering 0–30 V at 0–20 A with 300 W output, 1 mV resolution and LIST sequencing

  • Max wattage300 W
  • Output type300 W
  • Product dimensions6.7 in × 9.9 in × 4.4 in
  • Product weight4.4 lb (2 kg)
  • In the boxMATRIX Wide Range Programmable DC Power Supply WPS300S-30-20
  • Precise 1mV resolution enables exact voltage control
  • 300W output powers demanding lab and repair tasks
  • Switching design delivers linear-grade low ripple noise
  • RS232 RS485 USB interfaces allow automated test integration
  • LIST function stores up to 9999 sequence cycles

Programmable Bench Supply

The Matrix WPS300S-30-20 is a wide-range switching DC power supply rated for 0-30V and 0-20A with a maximum output of 300W. It targets engineers, technicians and educators who need precise, low-noise power for lab testing, electronic repair and teaching environments. The unit delivers linear-supply ripple performance in a compact switching design.

Interface And Control Limits

Standard communication interfaces include RS232, RS485 and USB supporting SCPI and MODBUS protocols for remote operation and data logging. Output resolution is 1mV and 0.1mA with ripple specified below 10mVrms and 3mArms. The LIST function allows up to 9999 cycle repetitions for automated test sequences, while keyboard lock prevents accidental parameter changes.

Voltage Current Envelope

The single specification that determines suitability is the 0-30V, 0-20A, 300W output envelope. Buyers needing more than 30V or more than 20A continuous current must select a different model. The supply accepts AC 110V or 220V input and includes overvoltage, overcurrent and overheat protection with storage for nine instrument setups.

How it compares

Measured against everything we stock in Server & Hot-Plug PSUs, at today’s prices. Recalculated every night.

Price $360.99
Pricier than about 88% of the 3,798 comparable items (median $131.99).
Max wattage 300 W
Lower than about 80% of the 235 comparable items (median 668 W).

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Specifications

Product
Brand nameMATRIX
Model name30 V 20A 300 W
Part numberWPS300S-30-20
Ports & slots
Output type300 W
Power
Max wattage300 W
Size & build
Product dimensions6.7 in × 9.9 in × 4.4 in
Product weight4.4 lb (2 kg)
In the box
In the boxMATRIX Wide Range Programmable DC Power Supply WPS300S-30-20, 30 V 20A 300 W, Switching Adjustable Bench Power Supply 1mV/0.1 mA Resolution,List Output,OCP OVP for Lab, Electronic Repair, School Teaching x 1

Questions about this item

Should I choose the WPS300S-30-20 or the WPS300S-150-5 model?

The WPS300S-30-20 delivers 0-30V and 0-20A for 300W, while the WPS300S-150-5 provides 0-150V and 0-5A at the same 300W. Pick the 30V unit when you need higher current at lower voltage, or the 150V unit for higher voltage at lower current.

What does the 300W rating mean when the supply is on my bench?

You can draw up to 300W continuously from the 0-30V, 0-20A output range. The switching design keeps ripple below 10mVrms and 3mArms, so the power stays clean enough for sensitive lab work, electronic repair, or teaching demonstrations.

Which communication interfaces are built in and what do they limit?

RS232, RS485, and USB are standard. They support SCPI and MODBUS commands for remote control and data logging, letting you automate voltage or current sequences up to the 9999-cycle LIST limit.

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