Product Description
The BK Precision 1901B is a laboratory-grade switching mode DC power supply featuring a variable output of 1–32 VDC at up to 30 A continuous, with a maximum output power of 960 W. It offers automatic CV/CC (Constant Voltage/Constant Current) crossover operation, dual-action coarse/fine rotary encoder controls, a front-panel 5 A auxiliary output, and both USB and analog remote control interfaces. Connectors include binding posts for the main and auxiliary outputs, a USB Type-B port, and a DB9 remote control terminal. Protections include overvoltage, overtemperature, overload, and short-circuit (constant current) safeguards, making it suitable for demanding bench and laboratory applications.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | BK Precision |
| Model / Part Number | 1901B |
| Series | 1900B |
| Product Type | Switching DC Power Supply (Bench Top) |
| AC Input Voltage | 100–120 VAC, 60 Hz (110VAC version) |
| Full Load Input Current | 9.0 A (110 VAC) / 4.5 A (230 VAC) |
| Variable Output Voltage | 1 – 32 VDC |
| Variable Output Current | 0 – 30 A |
| Auxiliary Output Current | 5 A (front panel) |
| Maximum Output Power | 960 W |
| Number of Outputs | 1 |
| Voltage Regulation (Line) | ≤ 20 mV |
| Voltage Regulation (Load, 0–100%) | ≤ 50 mV |
| Current Regulation (Line) | ≤ 50 mA |
| Current Regulation (Load) | ≤ 150 mA |
| Ripple & Noise Voltage (rms) | ≤ 5 mV rms |
| Switching Frequency | 75 – 95 kHz |
| Efficiency | 87% (120 VAC) |
| Power Factor Correction | > 0.95 at optimal load |
| Display Type | 3-Digit LED (Voltage & Current) |
| Meter Accuracy | ±0.2% + 3 counts |
| Control Interface | USB, Analog Remote Control |
| Control Modes | Front Panel, Analog Remote, USB Remote, Preset Recall |
| User Presets | 3 User-Defined Voltage & Current Presets |
| Control Knob | Dual-Action Coarse/Fine Rotary Encoder |
| CV/CC Operation | Automatic CV/CC Crossover |
| Protections | Overvoltage, Overtemperature, Overload, Short Circuit (CC mode) |
| Cooling Method | Thermostatically controlled fan (zero to full speed) |
| Operating Temperature | 0°C to 40°C (32°F to 104°F), ≤ 80% RH |
| Dimensions (W × H × D) | 7.9" × 3.5" × 10.8" (200 × 90 × 275 mm) |
| Weight | 7 lbs (3.2 kg) |
| Included Accessories | Power Cord, Instruction Manual, Remote Control Connector |
We warranty all items for 30 days from date of purchase.
