Model MDL4U252

MDL4U Series

Programmable DC Electronic Load Module 250 W / 80 V / 20 A

Price: $2495 / 3 yr Warranty

Name Qty Last Updated
NEWARK 2 2023-09-24
TESTEQUITY 3 2023-09-24
DIGI-KEY 4 2023-09-23


The MDL4U Series is a multi-channel modular programmable electronic load system. Seven different modules of programmable DC loads ranging in power from 200 W to 600 W provide users the flexibility to test a wide range of power sources from multi-output DC power supplies to batteries, fuel cells, and photovoltaic arrays.

The mainframe has four slots that can be configured with any assortment of the modules up to 2400 W (up to 4800 W with mainframe extension). The high-performance electronic load modules of the MDL4U Series are capable of operating in constant current (CC), constant voltage (CV), constant resistance (CR), constant power (CW), and constant impedance (CZ) mode, which uses DSP technology to simulate non-linear loads and realistic loading behavior.

  • Modules offer wide voltage and current range, 0 to 500 V, 0 to 120 A
  • Support for up to 4 modules/8 channels or 8 modules/16 channels with mainframe extension
  • Transient mode up to 25 kHz
  • Synchronous Load on/off function
  • Adjustable slew rate in CC mode
  • Standard LAN, GPIB, USB, and RS232 interfaces with USBTMC/SCPI protocol support
  • Short circuit test simulates a short at the input
  • Built-in 16-bit resolution voltage and current measurement (0.1 mV, 0.01 mA)
  • Remote voltage sensing to compensate for the effect of voltage drop in wires
  • Operate identical modules in parallel mode for high current applications
  • OVP/OCP/OPP/OTP and reverse voltage protection
  Mainframe  Mainframe Extension Modules
Model MDL4U001 MDL4U002 MDL4U200 MDL4U252* MDL4U302* MDL4U305 MDL4U400 MDL4U505 MDL4U600
Power up to 2400 W total up to 2400 W total 200 W 250 W/50 W 300 W/300 W 300 W 400 W 500 W 600 W
Voltage n/a n/a 80 V 80 V 80 V 500 V 80 V 500 V 80 V
Current n/a n/a 40 A 20 A 45 A 20 A 60 A 30 A 120 A
Inputs n/a n/a 1 2 2 1 1 1 1
*The MDL4U252 and MDL4U302 are dual-channel modules. MDL4U252 users can allocate 250 W to either channel up to 300 W total (e.g. 50 W/250 W, 250 W/50 W, 150 W/150 W). MDL4U302 users can allocate 300 W to either channel up to 600 W total (e.g. 300 W/300 W).

MDL Series (non-4U) modules are not compatible with newer MDL4U Series mainframe model MDL4U001 or mainframe extension model MDL4U002. 


Product Max Voltage Max Current Max Power Type Interface MSRP
MDL4U200 80 V 40 A 200 W 1 $1470
MDL4U002 n/a n/a 2400 W n/a $1680
MDL4U400 80 V 60 A 400 W 1 $1965
MDL4U001 n/a n/a 2400 W n/a $1980
MDL4U305 500 V 20 A 300 W 1 $2210
MDL4U252 80 V 20 A 250 W 2 $2495
MDL4U600 80 V 120 A 600 W 1 $3230
MDL4U302 80 V 45 A 300 W 2 $3330
MDL4U505 500 V 30 A 500 W 1 $3700









Rack Mount Front Handle Brackets for MDL Series


Front-end rack mount hardware for the MDL001 and MDL002.

Kit includes brackets, handles, and screws. The RK153 is not intended to be a load-bearing piece of hardware. To support the weight of the equipment, please contact your rack manufacturer for specific supporting hardware.

MSRP: $69

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