SORENSEN DCS50-20EM9C (DCS50-20E) Programmable DC Power Supply | Replacement, Equivalent & Selection Guide
The SORENSEN DCS50-20EM9C (also catalogued as DCS50-20E) is a high-performance, fully programmable DC power supply from the SORENSEN DCS Series, designed for demanding laboratory, industrial test, and automated production environments. This page provides complete technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.
Technical Specifications
- Brand: SORENSEN (Ametek Programmable Power)
- Model: DCS50-20EM9C / DCS50-20E
- Output Voltage: 0 – 50 V DC (programmable)
- Output Current: 0 – 20 A (programmable)
- Output Power: 1000 W (1 kW)
- Input Voltage: 115 / 230 VAC ±10%, 47–63 Hz (auto-ranging or switch-selectable)
- Voltage Regulation (Load): ≤ 0.01% + 2 mV
- Current Regulation (Load): ≤ 0.01% + 2 mA
- Ripple & Noise (Voltage): ≤ 1 mV rms / 5 mV p-p
- Programming Interface: Analog (0–5 V / 0–10 V), RS-232, GPIB (IEEE-488), optional LAN/USB (suffix dependent)
- Suffix -M9C: Indicates RS-232 + GPIB + Analog programming interfaces
- Form Factor: 2U rack-mount (19-inch)
- Cooling: Forced air (fan-cooled)
- Weight: ~9.42 kg
- Operating Temperature: 0 °C to 50 °C
- Safety / EMC: CE, UL, CSA listed
Compatible Replacement & Equivalent Models
The following models are confirmed or commonly evaluated as direct or near-equivalent replacements for the DCS50-20EM9C. Always verify interface suffix and output ratings before substitution.
- SORENSEN DCS50-20E — Base model (same output, different interface suffix); verify programming interface compatibility
- SORENSEN DCS50-20EM — RS-232 + Analog variant; GPIB absent
- SORENSEN XG 50-20 — Next-generation replacement; 50 V / 20 A / 1 kW, LAN + USB + RS-232, improved ripple performance
- SORENSEN SGI 50/20 — Legacy equivalent; same voltage/current class, older GPIB-native architecture
- Ametek Programmable Power XG 50-20 — OEM-equivalent (SORENSEN rebranded under Ametek)
- Keysight N5750A — Cross-brand equivalent; 50 V / 15 A, LAN/GPIB/USB, suitable for lab environments
- Chroma 62050P-100-100 — Higher-range alternative; evaluate if voltage/current headroom is required
- TDK-Lambda GEN50-20 — Industrial-grade equivalent; 50 V / 20 A, RS-232/RS-485/GPIB options
Note: Suffix codes (e.g., -M9C, -M, -E) define interface options. Confirm suffix before ordering to ensure drop-in compatibility with existing control systems.
Why Choose the Original Model
- Proven field reliability in continuous-duty industrial and laboratory environments
- Multi-interface programming (RS-232 + GPIB + Analog) enables integration with legacy ATE systems without additional converters
- Tight regulation (≤ 0.01% load/line) critical for precision component characterization and burn-in testing
- SORENSEN DCS Series has an established installed base with broad third-party software support (LabVIEW, MATLAB, Python VISA)
- Rack-mount 2U form factor fits standard 19-inch enclosures with minimal footprint
- OEM-sourced replacement parts and calibration services available through Ametek service network
Typical Applications
- Automated Test Equipment (ATE) and production line functional testing
- Component burn-in and accelerated life testing (ALT)
- R&D laboratory power sourcing for electronics development
- Motor drive and actuator characterization
- Battery charge/discharge simulation and profiling
- Semiconductor device characterization
- Telecommunications equipment testing (DC bus simulation)
- Defense and aerospace subsystem validation
System Compatibility
- GPIB (IEEE-488): Compatible with National Instruments GPIB controllers (PCI, PCIe, USB-GPIB); NI-VISA driver supported
- RS-232: Standard DB-9 interface; compatible with USB-to-RS232 adapters; SCPI command set
- Analog Programming: 0–5 V or 0–10 V control signals; compatible with DAQ cards (NI, Keysight, etc.)
- Software: LabVIEW IVI driver available; compatible with Keysight VEE, MATLAB Instrument Control Toolbox, Python (pyvisa)
- Rack Systems: Standard 19-inch EIA rack; 2U height; rear-terminal output connections
Selection Guide
Use the following criteria to confirm the DCS50-20EM9C is the correct model for your application, or to identify the best alternative:
- Output Voltage Required: If ≤ 50 V → DCS50-20EM9C is suitable. If > 50 V → consider DCS60-16E or XG 60-18 series.
- Output Current Required: If ≤ 20 A → DCS50-20EM9C is suitable. If > 20 A → consider DCS50-30E (30 A) or parallel operation.
- Interface Requirement: GPIB + RS-232 + Analog → DCS50-20EM9C (-M9C suffix). RS-232 + Analog only → DCS50-20EM. LAN/USB preferred → SORENSEN XG 50-20.
- Environment: Lab/ATE → DCS50-20EM9C. Harsh industrial (wide temp, vibration) → evaluate TDK-Lambda GEN series.
- Budget / Availability: New OEM → SORENSEN XG 50-20 (current production). Refurbished/surplus → DCS50-20EM9C or SGI 50/20.
Quality Assurance & Sourcing
- All units sourced through authorized distribution channels or verified surplus with full traceability documentation
- Pre-shipment functional testing: output voltage/current accuracy, regulation, and interface communication verified
- Units supplied with calibration certificate upon request (NIST-traceable available)
- Packaging: anti-static foam, double-boxed for international freight
- Lead time: typically 3–10 business days (stock-dependent); expedited sourcing available
- Warranty: 90-day functional warranty on all refurbished units; new units carry OEM warranty
How to Order
- Step 1: Confirm model number and suffix (e.g., DCS50-20EM9C) matches your interface and output requirements
- Step 2: Add to cart or contact us for bulk / B2B pricing and lead time confirmation
- Step 3: Provide PO number, shipping address, and any special requirements (calibration cert, inspection report)
- Step 4: Receive order confirmation with tracking within 1 business day of payment
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📞 Phone/WhatsApp: +0086 19859288691
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Replacement & Compatibility FAQ
Q: Is the DCS50-20EM9C the same as the DCS50-20E?
A: The DCS50-20E is the base model designation. The suffix -M9C specifies the interface configuration (RS-232 + GPIB + Analog). Electrically, output ratings are identical.
Q: Can the SORENSEN XG 50-20 directly replace the DCS50-20EM9C?
A: Yes, in most cases. The XG 50-20 offers the same 50 V / 20 A / 1 kW output with updated LAN/USB/RS-232 interfaces. GPIB is available as an option. Verify rack space (1U vs 2U) and connector pinout before installation.
Q: Is GPIB (IEEE-488) required, or can I use RS-232 only?
A: If your ATE controller uses GPIB bus, the -M9C suffix is required. If RS-232 or analog control is sufficient, the -EM suffix variant reduces cost. Contact us to confirm availability.
Q: Do you supply calibration certificates?
A: Yes. NIST-traceable calibration certificates are available upon request. Please specify at time of order.
Q: What is the lead time for the DCS50-20EM9C?
A: Typically 3–10 business days depending on stock. Contact us for real-time availability and expedited options.
Q: Can I return the unit if it does not meet specifications?
A: Yes. We offer a 90-day functional warranty. Units that fail to meet stated specifications are eligible for replacement or refund. Contact support within the warranty period.
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