Modular DC Load 500V – 4350 Series

Modular DC Load for Charger Testing, LED Driver Testing, Solar Panel Testing, & More!


  • 3 sizes – 150, 300, & 600W @ 500V with advanced measurement capability built-in
  • Mix & match loads for maximum configuration flexibility
  • Up to 16 loads in a single, 8 3/4″ / 5U Model 4300 chassis
  • Front loaded & front connections
  • 3 voltage and 3 current ranges for improved accuracy
  • High-resolution waveform capture for analysis of dynamic transients
  • Isolated digital inputs & outputs for test fixture support
  • PC/LAN control with LabVIEW & IVI drivers
4350 DC Electronic Load (front)


NHR’s 4300 DC Loads have been used across a variety of major company initiatives and remains a highly competitive product on the market. The modular 4300 DC electronic load is ideal for rack and stack ATE customers, military as well as aerospace applications. This flexible load measurement system can be reconfigured easily to test products in parallel which better simulates real-world conditions and improves testing time. The capability to combine up to 16 loads into a single chassis, with fast transient speed and synchronous measurement, opens several new test strategy possibilities. The 4300 DC electronic load is perfect for applications that require simultaneous testing of multiple power conversion UUTs or multi-output power supplies.

Another major advantage is the built-in 4301 Digital Power Analyzer that provides accurate UUT input measurements dedicated to each tester channel. This advanced digital measurement system is capable of measuring devices in a few seconds. The analyzer includes a power meter, multi-meter, and oscilloscope that together provides a powerful test solution.

This distributed measurement capability allows measures each output from a multi-output power conversion device simultaneously rather than sequentially. Not only does this dramatically reduce the overall test time but also provides far better channel-to-channel performance measurements including dynamic cross effects. This flexible DC load and measurement system allows you to reconfigure the loading arrangement as required by future test needs.

Advantages and Benefits


  • Modular load maximizes configuration flexibility
  • Simplifies automated test stand development
    - Triggerable set & measurment
    - Short circuit mode & over voltage relay
    - Isolated digital inputs & outputs
    - Built-in SW watchdog & safety limits
  • Software tools to shorten test development time
    - PC-based Softpanel GUI with scope display
    - Supplied LabVIEW & IVI-C/IVI-COM drivers
    - Optional: DC Load, emPower®, or Enerchron® test sequencer


  • Modular - up to 16 loads or combinations in single chassis
  • Built in features require fewer test devices
  • Front connections simplify wiring
  • Safety limits protect UUT

DC Loads: Ultimate Configuration Flexibility for Parallel Testing

Chart 4300 Multiple Load Configurations - NH Research (NHR)
5 of the 25 possible load configurations using 150W, 300W & 600W dc loads.

Constant Power Envelope

Chart: Constant Power Operating Envelope 4312 Series
Constant Power operating envelope (4312)
Chart: Constant Power Operating Envelope 4350 Series
Constant Power operating envelope (4350)
Communications Radar System - NH Research (NHR)

Testing Applications


  • ATE Testing: Radar Power Emulation, Aviation, Power Supply, Solar Panel
  • Power Devices: Chargers, Adapters, DC Supplies, LED Drivers, Telecom Rectifiers
  • Fuel Cell Test, Super Capacitor Test
  • Power Conversion
  • EV Subsystem Test: OBC, V2G, APM, DC/DC Converter
  • Highly Modular, Flexible & Compact Test Requirements


“NHR’s 4300 platform provides us with the performance, reliability, and long-term support we need for the eCASS Program. We look forward to working together in the future.”

– Ed Melville, Automated Test Systems Portfolio Manager, Lockheed Martin

NHR eCass Program - NH Research (NHR)

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