NH Research 4350 Series Modular Programmable DC Electronic Load

NH Research 4350 Series Modular Programmable DC Electronic Load

Product Overview:

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



The concept of having an advanced digital measurement system built in to each load plus being able to combine up to 16 of such loads into a single chassis opens several new test strategy possibilities that have significant economic and quality benefits.

The most important test strategy is the ability to test consumer power devices such as chargers, adapters and LED drivers in parallel, up to 16 in a single pass. Test times for such devices are now measured in a few seconds.

The other major advantage of this distributed measurement is the ability to test each output of 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. In this manner quality of the devices tested takes a large step forward because the parallel tester better simulates real life conditions where all outputs are exercised together.

Yet another benefit of such a flexible load/measurement system is the ability to reconfigure the loading to adapt to almost any new loading arrangement required by brand new UUTs in the future.

Ultimate Configuration Flexibility

As a result of designing all 3 sizes of loads to utilize a common 16-slot mainframe, a new level of configuration flexibility is achieved. There are now 25 different combinations of loads that can be configured. Should the initial load selection ever need an updating, physically changing the configuration can be accomplished by convenient front-chassis-access or virtually through software paralleling of the existing loads. From 16 of the 150W loads to the 4 of the 600W loads or any combination in between, meeting a wide variety of UUT loading demands within the 2400W mainframe rating has never been easier.

Possible Load Configurations

150 150 150 150 150 150 150 150 150 150 150 150 150 150 150 150
300 300 300 300 300 300 300 300
600 600 600 600
150 150 150 150 150 150 150 150 300 300 600
150 150 150 150 300 300 600 600

Extended Internal Measurements

In almost every application the 4350 Modular DC Electronic Load eliminates the need of separate external instruments to capture timing and other dynamic measurements during UUT turn-on and turn-off as well as precision power measurements. This is accomplished by incorporating the task-essential features of a DMM, DSO, transient generator and power meter on each load. With this built-in capability, the 4350 can rapidly generate engineering-characterization-like test information at lightning test speeds. In addition, there is a significant cost saving by eliminating all single-function test instruments along with related cabling and switches.



Model # 4350-150 4350-300 4350-600
Chassis Slots 1 2 4
Power 150 W 300 W 600 W
Voltage 0 – 500 V 0 – 500 V 0 – 500 V
Current 0 – 30 A 0 – 60 A 0 – 120 A

Application Testing

The Model 4350 Modular DC Electronic Load is useful for testing the following applications & products:
Consumer Power Devices, Chargers, Adapters, LED Drivers