Sorensen DCR40

The Sorensen DCR40 is a phase-controlled DC power supply series engineered for laboratory and industrial applications requiring stable, adjustable power delivery. Built around SCR input stages followed by passive Pi filtering, these units deliver precise voltage and current regulation across a 0–40 VDC output range with current capacities from 13 A to 125 A depending on model selection. The DCR40 accommodates single-phase 103–127 VAC or 115 VAC inputs, as well as three-phase 460 VAC operation, with 50/60 Hz compatibility available without de-rating on select models. Each unit features adjustable current limiting with automatic recovery, overtemperature protection, and optional or standard overvoltage protection. Output regulation spans from 0.01% + 2 mV to 0.05% line and load, with voltage ripple and noise specifications as low as <3 mVrms/<50 mVp-p on high-current models. Transient response typically returns to ±1% within 50 ms following a 50–100% step load change. The variable-speed cooling fan ensures efficient thermal management across continuous operation. Front-panel coarse and fine adjustment controls provide intuitive voltage and current limit settings. Display options include digital readouts or dual analog meters depending on model variant.

– Technical Specifications

• Output Voltage: 0–40 VDC, adjustable
• Output Current: Model-dependent: 0–13 A, 0–25 A, 0–40 A, 0–60 A, 0–70 A, 0–125 A
• Power Output: Approximately 1.6 kW to 5 kW per phase
• Input Voltage: 103–127 VAC single-phase, 115 VAC single-phase, or 460 VAC three-phase; 50/60 Hz operation supported
• Voltage Regulation: 0.01% + 2 mV to 0.05% depending on model
• Current Regulation: 0.01% + 200 mA to 0.25% depending on model
• Ripple and Noise: <3 mVrms/<50 mVp-p to 90 mVrms depending on model
• Transient Response: 50 ms typical to ±1% band for 50–100% step load change
• Voltage Drift: 0.1% typical over 8 hours following 30-minute warmup
• Current Drift: 0.15% typical
• Efficiency: Up to 79%
• Power Factor: 0.68 typical

– Key Features

• Adjustable current limiting with automatic overload recovery
• Standard and optional overvoltage protection
• Overtemperature protection
• Variable-speed fan cooling
• Bench or rack-mount configuration
• Digital or analog display options

– Typical Applications

• Electronic device testing and development
• Sensitive circuit characterization
• Laboratory power distribution
• Industrial equipment commissioning

– Compatibility & Integration

Front-panel voltage and current limit adjustment supports manual control; remote programming capability available on select models.