4 Series

Multi-Channel DC Load, up to 1.2kW

4 Series

Multi-Channel DC Load, up to 1.2kW

Adaptive Power 4 Series Multi-Channel DC Loads deliver versatile testing for AC/DC supplies, DC/DC converters, battery chargers, and LED drivers. With up to 8 modules per 19″ rack, or compact 1–2 slot mainframes, the series offers 12 module types from 75W to 400W with dual range capability for precision. Voltage options span up to 500Vdc. The 41T Series has a TURBO mode for short-term overload testing up to 3x times the rated current or power of the load for peak power.

Why Choose 4 Series

Modular & Multi-Channel

Supports up to 8 synchronized load modules per 19″ rack, with options for single, dual, or LED-simulating modules

High Performance

Handles up to 500V and up to 80A continuously, with up to 180A Turbo mode for short-term overload testing

Versatile Load Modes

Constant Current, Voltage, Power, Resistance, and LED modes, plus optional waveform and quick charger testing

Advanced Control & Protection

USB, LAN, GPIB interfaces, multi-load synchronization, and built-in safeguards against over-current, over-voltage, and over-temperature

Key Specifications

  • Max. Power 400W per Module
  • Parallel Modules to 1200W
  • Extended Voltage Range, 0 – 500Vdc
  • Max. Current Range 80Adc
  • Single Load, Dual Load and LED Load Modules Available
  • Turbo DC Loads support 3x times rated power & current for overload testing
  • 1, 2 or 4 slot Mainframes for up to 8 Load Channels
  • Synchronized Operation of Multiple Loads
  • Special LED Load Models available for lighting applications
  • Operating Modes: CC, CP, CR, CV, CC+CV, CP+CV and LED
  • Built-in Short Circuit Test
  • Fast Current Slew Rates
  • Power Supply Over Current & Over Power Protection Test Mode
  • Static and Dynamic CC Modes
  • Available Interface Options are USB, RS232, GPIB and LAN
  • Available Options: Quick Charger Tester (Opt QCT), Current Waveform Generator (Opt CWG)
  • APS DC Load Control windows software
  • CE Mark

DC Loads up to Four Loads per Mainframe

LED Load Simulation for Accurate Driver Testing

The 41D and 42D modules provide single or dual channel LED simulation with PWM dimming, synchronized multichannel operation, and clear LCD readouts. All 4 Series modules include OV, OC, OP, and OT protection, delivering reliable performance and durability at an affordable cost.

In LED mode, they replicate the forward-biased V-I curve of an LED or LED string—programmable for Io, Vo, Vd, and Rd to match specific driver designs.

Quick Charger Test Option

The Quick Charger Tester (Opt QCT) is a single-channel controller for R&D testing and verification of modern fast chargers. It simulates fast charge protocols for mobile phones, tablets, and notebooks, enabling rapid charger evaluation.

Supported Charging Protocols are: QC2.0, QC3.0, PE+, PE+2.0, USB PD2.0

Single Channel Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
41L06301506030⇒ Manual
41L06603006060⇒ Manual
41L251230025012⇒ Manual
41L501230050012⇒ Manual
41L0615756015⇒ Manual
Dual Channel Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
42L0860250/5080/8060/6⇒ Manual
42L0824120/12080/8024/24⇒ Manual
42L080340/4080/803/3⇒ Manual
LED Load Simulation Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
41D302430030024⇒ Manual
41D501230050012⇒ Manual
41D502430050024⇒ Manual
42D5006150/150500/5006.0/6.0⇒ Manual
Mainframes
MainframeNo. SlotsMax. PowerDimensions (WxHxD)WeightManual
44M011300W160x177x452mm5.5kg⇒ Manual
44M022600W269x177x452mm7.5kg⇒ Manual
44M0441200W440x177x445mm9.3kg⇒ Manual

Why Choose 4 Series

Modular & Multi-Channel

Supports up to 8 synchronized load modules per 19″ rack, with options for single, dual, or LED-simulating modules

High Performance

Handles up to 500V and up to 80A continuously, with up to 180A Turbo mode for short-term overload testing

Versatile Load Modes

Constant Current, Voltage, Power, Resistance, and LED modes, plus optional waveform and quick charger testing

Advanced Control & Protection

USB, LAN, GPIB interfaces, multi-load synchronization, and built-in safeguards against over-current, over-voltage, and over-temperature

Key Specifications

  • Max. Power 400W per Module
  • Parallel Modules to 1200W
  • Extended Voltage Range, 0 – 500Vdc
  • Max. Current Range 80Adc
  • Single Load, Dual Load and LED Load Modules Available
  • Turbo DC Loads support 3x times rated power & current for overload testing
  • 1, 2 or 4 slot Mainframes for up to 8 Load Channels
  • Synchronized Operation of Multiple Loads
  • Special LED Load Models available for lighting applications
  • Operating Modes: CC, CP, CR, CV, CC+CV, CP+CV and LED
  • Built-in Short Circuit Test
  • Fast Current Slew Rates
  • Power Supply Over Current & Over Power Protection Test Mode
  • Static and Dynamic CC Modes
  • Available Interface Options are USB, RS232, GPIB and LAN
  • Available Options: Quick Charger Tester (Opt QCT), Current Waveform Generator (Opt CWG)
  • APS DC Load Control windows software
  • CE Mark

DC Loads up to Four Loads per Mainframe

LED Load Simulation for Accurate Driver Testing

The 41D and 42D modules provide single or dual channel LED simulation with PWM dimming, synchronized multichannel operation, and clear LCD readouts. All 4 Series modules include OV, OC, OP, and OT protection, delivering reliable performance and durability at an affordable cost.

In LED mode, they replicate the forward-biased V-I curve of an LED or LED string—programmable for Io, Vo, Vd, and Rd to match specific driver designs.

Quick Charger Test Option

The Quick Charger Tester (Opt QCT) is a single-channel controller for R&D testing and verification of modern fast chargers. It simulates fast charge protocols for mobile phones, tablets, and notebooks, enabling rapid charger evaluation.

Supported Charging Protocols are: QC2.0, QC3.0, PE+, PE+2.0, USB PD2.0

Single Channel Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
41L06301506030⇒ Manual
41L06603006060⇒ Manual
41L251230025012⇒ Manual
41L501230050012⇒ Manual
41L0615756015⇒ Manual
Dual Channel Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
42L0860250/5080/8060/6⇒ Manual
42L0824120/12080/8024/24⇒ Manual
42L080340/4080/803/3⇒ Manual
LED Load Simulation Models
ModelMax. Power (W)Max. Voltage (V)Max. Current (A)Manual
41D302430030024⇒ Manual
41D501230050012⇒ Manual
41D502430050024⇒ Manual
42D5006150/150500/5006.0/6.0⇒ Manual
Mainframes
MainframeNo. SlotsMax. PowerDimensions (WxHxD)WeightManual
44M011300W160x177x452mm5.5kg⇒ Manual
44M022600W269x177x452mm7.5kg⇒ Manual
44M0441200W440x177x445mm9.3kg⇒ Manual