COMPACT DC ELECTRONIC LOAD
- Load Voltage: 18V, 36V, 60V
- Load Current: 2A, 5A, 10A
- Load Power: 75W
- Extremely compact
75W Load in ultra-compact 1.38-inch width
EGS series is an ultra-compact DC electronic load, just 35mm wide, designed to solve space constraints in environments like on-bench and automotive testing. This slim profile enables high-density mounting of up to 10 units in a standard 19-inch rack. Combined with a master-slave function for synchronized control of up to 16 units, you can build space-saving and efficient multi-channel test systems. Equipped with Constant Current (CC), Constant Resistance (CR), and Constant Voltage (CV) modes, it flexibly supports a wide range of applications, including DC/DC converter and battery evaluation. Support your cutting-edge R&D with the quality and reliability of a product Made in Japan.
Features
Compact load devices are ideal for evaluation tests of small systems such as batteries and power supply circuits.
- Capable of batch control of a maximum of 16units using the master-slave function
- Settings in 1mA increments, depending on the model.
- Multiple operation modes Constant Current (CC), Constant Resistance (CR), Constant Voltage (CV), and Constant Current + Constant Voltage (CC + CV)
Perfect space saving with an extremely compact, lightweight body to suit any customer's space for installation
While a typical 19-inch rack might only accommodate about five older units, the EGS series' compact design allows for up to 10 units in less space.
Batch control of up to 16 units with the master/slave function
The EGS series can be used as a multi-channel DC electronic load.
Providing four operating modes
- 1 Constant Current (CC) mode
- 2 Constant Resistance (CR) mode
- 3 Constant Voltage (CV) mode
- 4 Constant Current (CC) mode + Constant Voltage (CV) mode (*Available with the -LCcv option)
USAGE SCENARIOS
Main Applications
- Simulated load for DC/DC converter.
- Life testing of batteries
- Sensor simulation in vehicle-mounted testing
- Impedance variation testing for instrumentation signals
- Evaluation of boards
- LED driver
- Consumer power supplies
- Power converters
- Semiconductor components
Models
| Model | Rated voltage | Rated current | Rated power |
|---|---|---|---|
| EGS75W-18V | 18 V | 10 A | 75 W |
| EGS75W-36V | 36 V | 5 A | |
| EGS75W-60V | 60 V | 2 A |
Functions
Digital Interface
This is Matsusada Precision's proprietary digital communication port. This interface has modular type IN and OUT ports to allow daisy-chain connection. Combined with an adapter (sold separately). Multiple power supplies can be controlled at once. Adapters for LAN, USB, RS-232C, RS-485, and GPIB are available so that you can choose a suitable communication interface.
The connection of master-slave control will be made between the same models.
Load-off Timer Function
As the load-off timer function is set through the front panel operation, This function allows you to monitor the elapsed time from load-on and to automatically turn the load off after a set period. Time can be set from 1 second to 999 hours, 59 minutes, 59 seconds.
Remote Control
Specifications
- Input voltage
- 100 to 240 Vac, 50/60 Hz, Single-phase
- Operating mode
-
Constant Voltage (CV) mode
Constant Current (CC) mode
Constant Resistance (CR) mode
Constant Current (CC) + Constant Voltage (CV) mode (Option) - Load control
-
[Local] Setting via rotary encoder on the front panel
[Digital remote] Control via commands
Options
- -LCcv
-
This option enables Constant Current (CC) + Constant Voltage (CV) mode and Undercurrent Protection (UCP).
- -LH
-
The ground voltage between the load connection terminals and chassis is ±500 Vdc.
- -LUs1
-
Enable digital control via USB
One unit can be connected per USB port on the computer.
If the computer has an insufficient number of USB ports, a USB hub can be used.
However, correct operation cannot be guaranteed with all USB hubs (compatibility may vary depending on the USB hub).
(*Not compatible with the Master-Slave function.)
- -L(Mc0.15)
-
Communication cable length modification
The -L(Mc0.15) option changes the CO-M cable attached to the product from 2.0 m to 0.15 m.
(Note: The -L(Mc0.15) option cannot be selected together with the -L (Mc0.5) option.)
- -L(Mc0.5), -L(Mc0.15)
-
Communication cable length modification
The -L(Mc0.5) option changes the CO-M cable attached to the product from 2.0 m to 0.5 m.
(Note: The -L(Mc0.5) option cannot be selected together with the -L (Mc0.15) option.)
How to Order
When placing an order, please add the option code(s) after the model name. If adding two or more options, omit the “-L” from the second and subsequent option codes, and list them in alphabetical order, with the cable length option placed at the end.
Example: EGS75W-36V-L(Mc0.5)
Accessories
- Digital interface port
-
A digital interface adapter (sold separately) is required to use Matsusada Precision's digital interface. The following interface adapters are available, depending on your controller's port type.
- CO-E32m: LAN adapter
- CO-U32m: USB adapter
- CO-MET2-9: RS-232C (9 pin) adapter
- CO-MET2-25: RS-232C (25 pin) adapter
- CO-MET4-25: RS-485 (25 pin) adapter
(CO-MET2-9/CO-MET2-25/CO-MET4-25: The connector is D-sub type.) - CO-G32m: GPIB adapter (Scheduled for discontinuation in December 2028)
Example of communication with a digital adapter 
For details, refer to CO/USB series
- AC Input Cable
-
Standard CABLE TYPE1 
125 V/10 A 2.5 meters
Fixed lengthSold separately CABLE TYPE3 
250 V/10 A 2.5 meters
Fixed lengthSold separately CABLE TYPE4 
250 V/10 A 2.5 meters
Fixed length
- Stand
-
Convenient for using one unit at a time.
- Rack mount shelf
-
- Up to 10 units can fit on one rack shelf within a cabinet, and each unit can be easily removed individually.
- Ideal for use in systems
- Includes a fan unit (AC 100V).
* Please contact a sales representative if you plan to use the product outside of Japan. - AC power input can be consolidated for the system.
- Application software
-
PSS2en series: Remote control, Test workflow design, and Data logging
Click here for the PSS2en seriesPSS2en is dedicated software that facilitates simple setup and control of various power supplies, electronic loads, and digital power supply controllers manufactured by Matsusada Precision Inc.
It is ideal for aging tests, burn-in tests, and withstand voltage tests for electronic components, as well as endurance tests, intermittent/continuous operation tests, or various simulation tests for automotive electrical components.
Dimensions
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-
EGS series Datasheet
Date: 2025-10-27 rev 12
PDF (2,124 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
DC Electronic Load Selection Guide
Date: 2025-5-20 rev.05
PDF (5,477 KB)
-
EGS series Basic Instruction Manual (Japanese and English)
Date: 2021-12-17 rev. 0.5
PDF (778 KB)
-
EGS series Instruction Manual
Date: 2022-5-25 rev.2.1
PDF (2,025 KB)
-
EGS series Outline Drawing (DXF, PDF)
Date: 2021-01-20
ZIP (305 KB)
Login Required
-
EGS series Datasheet
Date: 2025-10-27 rev 12
PDF (2,124 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
DC Electronic Load Selection Guide
Date: 2025-5-20 rev.05
PDF (5,477 KB)
-
EGS series Basic Instruction Manual (Japanese and English)
Date: 2021-12-17 rev. 0.5
PDF (778 KB)
-
EGS series Instruction Manual
Date: 2022-5-25 rev.2.1
PDF (2,025 KB)
-
EGS series Outline Drawing (DXF, PDF)
Date: 2021-01-20
ZIP (305 KB)
On this website, we provide only the latest versions of information and instruction manuals for our products. Therefore, the newest versions of manuals on the website may differ from those that came with products you purchased in the past.
