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Grey rectangular bench power supply with front panel knobs and display

B&K Precision

B&K Precision 1901B DC Power Supply 30 A 32 V 110 V AC

SKU CH-ANSD-SMF21

A switching DC power supply delivering 0 to 30 A at 1 to 32 V from 110 V AC with automatic CV/CC crossover and three preset memories

  • Product typeTraffic & Parking Lot
  • 30 A maximum current delivers high power for demanding loads
  • 1–32 V adjustable range covers a wide variety of test scenarios
  • 110 V AC input suits standard bench mains without extra wiring
  • Automatic CV/CC crossover keeps output stable when load conditions change
  • Three preset memories recall voltage and current settings instantly

Laboratory switching supply

The B&K Precision 1901B is a laboratory-grade switching mode DC power supply delivering adjustable output from 1 to 32 V and 0 to 30 A. It operates on 110 V AC mains and suits production testing, telecommunications, R&D, service, and university labs needing high current in a compact form factor. Automatic CV/CC crossover ensures smooth transitions between constant voltage and constant current modes during operation.

Bench integration and presets

Dual-action coarse and fine rotary encoders make voltage and current adjustments fast and precise without extra peripherals. Up to three preset combinations of voltage and current values can be stored for instant recall during repetitive test sequences. A remote control function allows output parameters to be adjusted externally, freeing front-panel access for dense bench setups or automated test racks.

Sustained load protection

Built-in over-voltage protection (OVP) and over-temperature protection (OTP) safeguard the unit and connected loads during extended high-current runs. The switching topology maintains high efficiency across the output range, reducing internal heat rise when the supply operates continuously at 30 A. Protection circuits engage automatically without operator intervention, preserving test continuity under prolonged stress.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $686.99
Pricier than about 91% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameBK
Product typeTraffic & Parking Lot

Questions about this item

What is the maximum continuous current the 1901B can deliver at full 32 V output?

The 1901B supplies up to 30 A across the entire 1 V to 32 V range, so full current is available at the top voltage.

How loud is the cooling fan and how much waste heat appears during all-day operation?

The switching design runs cool and the internal fan stays quiet even during extended bench sessions.

Which AC mains voltage must the bench already provide for this unit to power up?

This model requires a 110 V AC supply; plug it into a standard North-American outlet and it is ready.

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