Sorensen DCR20-50B

The Sorensen DCR20-50B is a 1000-watt SCR-controlled DC power supply engineered for demanding benchtop and system-level applications. It delivers adjustable output from 0 to 20 Vdc at 0 to 50 A with automatic crossover between constant voltage and constant current modes. The unit maintains tight regulation and stability across temperature extremes, supports both local and remote operation, and includes remote sensing and programming capabilities for integration into automated test systems.

– Technical Specifications

• Output Power: 1000 W
• Output Voltage Range: 0–20 Vdc
• Output Current Range: 0–50 A
• Input Voltage: 103–127 Vac single phase (115 Vac standard; 208/220/230 Vac optional)
• Voltage Regulation (Line & Load Combined): 0.05% or 10 mV, whichever is greater
• Voltage Stability: 0.1% of output voltage maximum over 8 hours after 30-minute warm-up
• Current Stability: 0.15% of output current maximum over 8 hours after 30-minute warm-up
• Voltage Temperature Coefficient: 0.015%/°C of output voltage maximum
• Current Temperature Coefficient: 0.03%/°C of output current maximum
• Transient Response: 50 ms typical
• Weight: 69 lbs

– Key Features

• Constant voltage and constant current modes with automatic crossover
• Mode indication via panel lights
• Standard overload protection
• Remote voltage and current programming via external resistor (±30 ppm low temperature coefficient recommended; ~1.0 mA programming current)
• Remote sensing with maximum drop per load lead not exceeding 5% of maximum output voltage or 3 V, whichever is smaller
• Control terminals on rear terminal board TB3; shutdown capability via sense-to-shutdown terminal connection
• Direct and master/slave parallel operation support

– Typical Applications

Semiconductor manufacturing, laboratory testing, and electronics development requiring stable, precisely controlled DC power.

– Compatibility & Integration

Part of the Sorensen DCR-B series. Supports remote sensing and programmable control for system integration.