Sorensen DCR20-25B2

The Sorensen DCR20-25B2 is a programmable DC power supply delivering 500 W across a 0–20 V, 0–25 A output range. It operates in constant voltage (CV) and constant current (CC) modes with automatic crossover, maintaining CV regulation to 0.05% and CC stability at 0.15% of maximum. The unit produces 65 mVrms typical noise and ripple with 50 ms transient response to 50% load changes.

– Technical Specifications

Output:
• Voltage: 0–20 V DC
• Current: 0–25 A
• Power: 500 W
• CV Regulation: 0.05% (line and load combined)
• CC Stability: 0.15% of maximum current
• Noise/Ripple: 65 mVrms typical
• Transient Response: 50 ms (50% load change)
• Temperature Coefficient: 0.015%/°C voltage, 0.03%/°C current
• Long-Term Stability: 0.1% voltage, 0.15% current (8 hours post warm-up)

Input:
• Nominal: 115 VAC single phase
• Optional: 208, 220, 230 VAC (M1, M2, M3)
• Frequency: 50/60 Hz without derating

– Key Features

• Overvoltage protection with crowbar circuit
• Adjustable current limiting for short-circuit and overload protection with automatic recovery
• Remote sensing capability (5% voltage drop or 3 V maximum per lead, whichever is smaller)
• Remote programming: voltage, current, and resistance modes
• Voltage and amperage metering (analog standard; LCD digital available as M50 option)
• Direct and master-slave parallel operation supported
• Series operation capability
• Bench or rack-mount configuration

– Typical Applications

Laboratory testing, industrial automation, component burn-in processes, and load characterization requiring precise voltage and current control.

– Compatibility & Integration

• Rack slide kit available for all models
• M35 option: polarity switch and load disconnect
• Shipping weight: 65 lbs (Case Size I)