41T Series DC Loads


The 41T Series DC loads offer high power and current in a half-rack with form factor.

Both 41T Series models are rated at 800W continuous and 1600W in TURBO mode. TURBO mode which allows short term overload testing up to 3x times the rated current or power of the load. Available input voltage ranges are 0~80Vdc (41T08160) and 0~500Vdc (41T5040). Both models offer a wide V-I constant power load profile. The compact form factor of these DC Loads makes them convenient for bench use as well as rack mount applications. Available in stand-alone version or modular load form for use with 44M02 or 44M04 Mainframe.

If you can’t find what you are looking for on these product pages, contact us by phone or email to discuss your application requirements with one of our power specialist.


The 41T Series bench-top DC Electronic Loads are ideally suited for testing multiple output AC/DC power supplies, DC/DC converters, battery chargers and other power products. Target applications for these loads are research & development, production test, incoming inspection, quality control and service.
The high power density of the 41T Series bench top units support 800W in a compact form factor. The 41T Bench top Series consists of two stand-alone models and two Modular models offering a choice between high current (up to 160Adc) or high voltage (up to 500Vdc). All models offer dual range capability for optimal accuracy and resolution.


41T Series Models
41T08160DC Load, Half Rack800 / 160080160 / 320
41T08160MDC Load, Modular800 / 160080160 / 320
41T5040DC Load, Half Rack800 / 160050040 / 80
41T5040MDC Load, Modular800 / 160050040 / 80

Quick Charger Tester (Opt QCT): This plug-in module works with 41T Series DC loads and provides support for testing mobile device chargers that conform to the following charging protocols:

  • MediaTek PumpExpress
  • MediaTek PumpExpresss+
  • MediaTek PumpExpress+ 2.0
  • Qualcomm Quick Charge 2.0
  • Qualcomm Quick Charge 3.0
  • USB PD2.0

Current Waveform Generator (Opt CWG): This plug in module is available for 44M DC Load mainframes and provides arbitrary current waveform programming for up to four DC load modules.


  • Max. Power 800W continuous or 1600W in TURBO mode
  • Voltage Ranges 0 – 80Vdc or  0 – 500 Vdc
  • Max. Current Range 160 Adc
  • Convenient half rack width 4U for bench or rack use
  • Turbo DC Loads support 2x times rated power & current for overload testing
  • Operating Modes: CC, CP, CR, CV, CC+CV, CP+CV and LED
  • Built-in Short Circuit Test
  • Over Current Protection Test Mode
  • 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)
  • CE Mark


Load Versatility

All APS 41T Series bench loads are equipped with a powerful microcontroller and user friendly controls to provide capabilities that cover a wide range of load applications. Built in metering of Voltage, Current, Power and Resistance.

Power Supply Testing

With a choice of low voltage and high current or high voltage and lower current models, the 41T loads support testing of wide range of DC power products and AC/DC converters. The ability to execute automated load sequences and apply fast programmable current slew rates provides extensive testing and evaluation of power supply loop response and stability for a broad range of products.

Power Supply Design

With built-in features like over current protection (OPC) test and over power protection (OPP) test and dynamic constant current waveform testing, new power supply designs can be thoroughly evaluated against design specifications. An analog input mode allows arbitrary current waveforms to be applied to a unit under test as well.

Battery Charge/Discharge Testing

Time sequencing of specific discharge current levels as a function of battery voltage allows characterization and performance testing of various battery chemistries. The high current resolution and accuracy of the 41T Series load modules supports testing of very small batteries for portable device applications. The latest 41T Series DC loads offer built-in battery discharge profiles and Lithium battery BMS test mode.

Current Protection Device Testing

Testing of current protection devices like fuses, circuit breakers or PTC’s is automated using special test modes that increment current levels while tracking time to open on 41T model DC load modules..

Solar Panel Testing

Testing solar panels or cells is supported using built-in Maximum Power Point Tracking (MPPT) mode on 41T model DC load modules.


41T Series Bench or Modules with TURBO Mode
Model 41T0816o / 41T0816oM 41T5040 / 41T5040M
Power Ranges 0 – 80 W 0 – 800 W 0 – 80 W 0 – 800 W
Current Ranges 0 – 16 A 0 – 160 A 0 – 4 A 0 – 40 A
Turbo Mode 0 -320 A 0 – 1600 W 0 – 80 A 0 – 1600 W
Voltage Range 80 V 500 V
Load ON Voltage 0.1V-25V 0.4V-100V
OPERATING MODES Constant Current (CC), Constant Resistance (CR), Constant Voltage (CV), Constant Power (CP), CC+CP, CP+CV,
Battery Management System Test (BMS), Fuse Test, MPPT Mode
PROTECTION Over Power (OP), Over Current (OC), Over Voltage (OV), Over Temperature (OT)
T high & T low 0.010~9.999/99.99/9.999s (20 kHz)
Slew Rate 10.8-6755 mA / μsec 10.8-6750 mA / μsec 2.56-160 mA / μsec 25.6-1600 mA / μsec
Voltage Read – back Ranges 0 – 8.04 V 0 – 80.4 V 0 – 60.0 V 0 – 500.0 V
Current Read – back Ranges 0 – 16.02 A 0 – 160.2 A 0 – 4.02 A 0 – 40.2 A
Programmable Short BUILT – IN
Max. Short Current 160 A 40 A


Model 41T08160 Bench
Model 41T08160 Bench
Model 41T08160M Modular
Model 41T08160M Modular
41T Series Modular Load in 44M04 Mainframe
41T Series Modular Load in 44M04 Mainframe
Quick Charger Tester (Option QCT)
Model 41T5040 Bench
Model 41T5040 Bench
Model 41T5040M Modular
Current Waveform Generator (Option CWG)


Documentation, Technical and Application Assistance

Adaptive Power Systems’ seasoned sales and service team is here to help via email or a simple call.

You can also register to Access Our Online Technical Resources to download user manuals.


All 41T Series loads are supported by the APS DC Load Control windows software.

Key Features:

  • Control all Load Settings and Functions
  • Retrieve, Display and Store Measurement Data
  • Strip Chart display of all Load Measurements
  • Supports all APS DC Load Models
  • Save Setups for Quick Recall
  • Create, Save, Edit and Execute Auto Test Sequences
  • Develop Test Sequences Off-Line for later use
  • Windows 7 and Windows 8.1 Compatible
  • Multi-threaded Data Collection to Tab Delimited Text Files
  • Supports USB,  RS232, GPIB and LAN Interfaces
  • Built-in Simulation Mode
  • Simulation Mode Includes DC Supplies

Sample GUI Screens:

DC Loads, Electronic Loads, Programmable Loads
Modular DC Load Main Control Screen
DC Loads, Electronic Loads, Programmable Loads
DC Load Data Logging Screen
DC Loads, Electronic Loads, Programmable Loads
Individual Load Module Control Screen
Download Brochure