PLZ-4WL Series

High Speed-Large Current DC Electronic Load (CC/CV/CR/CP)


While the PLZ-4WL series succeeds to the superior operability of our conventional model of the PLZ-4W series, the PLZ-4WL series realizes the high speed rise and fall time (slew rate of 50A/µs.) in the range of low voltage with large current.
The PLZ-4WL offers six operation modes, and equips with various features such as sequence operation, switching operation, soft-start function, and time and voltage measurement.
The PLZ-4WL applies not only for the conventional load test of the CPU power supply, but also it can be applied to even faster current response test. In addition, the PLZ-4WL is a space-saving design (about 50% less volume of the conventional model) that can save the facility space of the testing site, and it can be applied for the single cell testing of the large scale rechargeable battery.


  • Applications
    - Test for the Low Voltage Power Supply of the CPU
    - Discharge test for the large current rechargeable battery
    - IV characteristic test of the solar battery
    - Impedance test for the various type of rechargeable batteries, power supplies
    - Test for the relays, switches
    - Absorbing the surge of brushless motor
    - Test for the prearcing time-current characteristic
  • Realizing the low voltage operation
    Possible to operate as low as 50mV by the input voltage. Even below the input voltage of 0.3V, this product can be used by reducing the current.
  • Accurate low-rate discharge by the Low-range (1/100)
    Each operation mode of the CC, CR, and CP has 3 ranges (H, M, L). The "L "range employs the scale of 1/100 which covers the range from the small to the large scale of the current.
  • Fast Slew rate
    Realize the slew rate of 50A/µs at 2.3V of the load input terminal voltage
  • Convenient feature for the discharge testing
    The Auto load-off timer and the Cut-off features can be applied to the discharge capacitance measurement of the rechargeable battery
  • Operation mode
    Applied to the 6 operating modes (Constant Current, Constant Resistance, Constant Voltage, Constant Power, Constant Current + Constant Voltage, Constant Resistance + Constant Voltage)
  • Sequence function
    The sequence mode can be set in 2 operation modes (Normal and Fast mode). The Fast mode can be set for the minimum step time of 25µs, and it can be synchronized with the external device by using the trigger input/output feature.
  • External analog control
    Not only the external control for the CC, CR, CP, and CV, but also it is capable to superimpose the current by the external input current on the present value of the CC setting. Moreover, it also can turn the LOAD ON/OFF.
  • Protection features
    To ensure the safety, it equips the various protection features and activation of the alarm function. The alarm function can be output to the external source as an alarm output. The fuse is used to cut-off the output for the protection feature of the reverse connection.
  • Other features
    -Switching operation
    -Set-up memories (100)
    -CC soft-start
    -Slew rate setting (CC)
    -Response setting (2 levels for each CV and CR)
    -Current monitor output
    -Remote sensing
    ...and more.


Model Specification
PLZ334WL Manual... DC Electronic Load (E-Load), 0.3 to 30V, 100A, 330W , Rise time: 2 µ s (which converts to rise and fall times) high-speed response, Possible to perform actual Load simulation by sequence control function, Equipped with USB (Supplied as standard)

Options (Related products)

Option(s) for PLZ-4WL series
Accessory Kit for PLZ-4WL series. Used for the connection of J1 Connector on the rear panel when operating by external control. Contents: Connector, Semi-cover, Pin(26 sets)

Wavy for PLZ-4W
Wavy for PLZ-4W
Sequence Creation Software
Sequence Creation Software for PLZ-4W/4WL/4WH series

Rack Adapter
Rack adapter (Metric size) *Applicable series name: PWR(01), PAS, PMR, PMP, PAK-A, PMC, PMC-A, PMX-A, PMX-Multi, PCR500M(MA), PLZ-205/405W, PLZ-4W/4WL/4WH, PLZ-3W/3WH, PIA4800

Rack Adapter
Rack adapter (Inch size) *Applicable series name: PWR(01), PAS, PMR, PMP, PAK-A, PMC, PMC-A, PMX-A, PMX-Multi, PCR500M(MA), PLZ-205/405W, PLZ-4W/4WL/4WH, PLZ-3W/3WH, PIA4800