COMPACT BENCHTOP DC POWER SUPPLY
- Voltage range: 2 V to 40 V
- Current range: 0.1 A to 4 A
- Output Power: 0.2 W to 36 W
- Silent operation (Fanless design)
Ultra Compact, Programmable DC Power Supply
Ultra-Compact, Programmable DC Power Supply
The R4K-36 series offers a high power density of 36 W in a compact, space-saving design. Despite its small footprint, this series delivers high performance and multifunctionality. With a current setting resolution of 0.1 mA, the R4K-36 is ideal for applications requiring precise current control, such as the evaluation of LEDs and OLEDs.
All models feature 4-digit voltage and current meters for precise monitoring. A standard digital interface enables easy integration into quality assurance systems and production lines.
Compact Design: Comparable in size to a standard computer mouse, the R4K-36 maximizes workbench space.
FEATURES AND BENEFITS
- Compact and light-weight space-saving design
- Output current controlling in units of 0.1mA
- Excellent quietness with natural air-cooling system
- Unique low noise power conversion technology for research application
- Multiple units operation with master-slave and digital interface
- Very quiet due to the adopting natural air-cooling system without a cooling fan
Suitable for applications requiring quietness - Four-digit meter
- High resolution D/A, A/D converter integrated
- Digital Interface is also available.
- Programmable waveform with pulse and ramp sequence function without external signal
- Output voltage and output current can be set speedily.
When setting output voltage and output current by the rotary encoder on the front panel, every time the fine switch is pressed, the setting digit on the digital display will be switched. In the case of setting a small output value or changing the setting value widely, the setting can be done speedily. (Fine switch cannot be used when output value is set by remote controlling.)
Ultra Compact !
You can realize how small it is in comparison to a mouse.
Models
| Model | Output | Ripple *1 | Minimum setting unit *2 | AC input | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Voltage [V] |
Current [A] |
Power [W] |
Voltage [mVrms] |
Current [mArms] |
Voltage [mV] |
Current [mA] |
Voltage | Current [typ.] |
||
| 115 V | 230 V *3 | |||||||||
| R4K2-0.1 | 0 to 2 V | 0 to 0.1 A | 0.2 W | 1 mV | 1 mA | 1 mV | 0.1 mA | 115 V ±10% 230 V ±10% *3 50/60 Hz single-phase |
0.1 A | 0.05 A |
| R4K36-0.1 | 0 to 36 V | 0 to 0.1 A | 3.6 W | 2 mV | 1 mA | 10 mV | 0.1 mA | 0.5 A | 0.25 A | |
| R4K8-3 | 0 to 8 V | 0 to 3 A | 24 W | 4 mV | 4 mA | 1 mV | 1 mA | 1 A | 0.5 A | |
| R4K6-4 | 0 to 6 V | 0 to 4 A | 24 W | 5 mV | 8 mA | 1 mV | 1 mA | 1 A | 0.5 A | |
| R4K40-0.6 | 0 to 40 V | 0 to 0.6 A | 24 W | 3 mV | 1 mA | 10 mV | 0.1 mA | 1 A | 0.5 A | |
| R4K36-1 | 0 to 36 V | 0 to 1 A | 36 W | 5 mV | 5 mA | 10 mV | 1 mA | 1 A | 0.5 A | |
| R4K18-2 | 0 to 18 V | 0 to 2 A | 36 W | 5 mV | 5 mA | 10 mV | 1 mA | 1 A | 0.5 A | |
- The ripple applies from 10% to 100% of the rated output.
- The minimum setting unit of the instrument panel. With the remote control, more detailed settings are available. Go to "Various Digital Control Functions".
- -L(230V) option
Functions
Multi Setting Function
In addition to the standard preset function, the R4K-36 can store three different voltage and current settings. This feature eliminates the need for manual adjustment between tests, significantly improving efficiency in production inspection processes and repetitive testing environments.
Sink Current Suppression
When supplying power to loads with capacities like batteries and capacitors, the sink current suppression is used to reduce the reverse current flowing from the load to the unit in order to prevent a voltage drop on the load as the output is OFF or the set voltage is lowered.
- Note
- IReverse current cannot be controlled and stabilized. Connect a dummy resistor or reverse current prevention diode when the load of the reverse voltage is equal to or higher than the rated voltage (inductive loads, regenerative motors, etc.)
Delay Trigger Function
Function to delay the OUTPUT ON/OFF time. It is possible to use in case a single unit of R4K-36 series is used, and also when connecting several Matsusada Precision power supplies using master-slave connection terminal and output voltage/output current are set individually, delay trigger function can be used.
(When -LUs1 or -LRmf option is selected, only one unit of R4K-36 series can be used.)
Two Mode Lock Function
Function to select two different lock functions for two different purposes. "Full Lock" locks all the function on front panel, and "Normal Lock" locks all the function except for ON/OFF. "Full Lock" mode is ideal for situations where incorrect operations must be completely prevented, and "Normal Lock" mode shall be good in case to avoid misoperation but secure the way for emergency stop of the power supply. You can select the best mode according to your level of "Security".
(In both modes, emergency stop is possible with Power Switch.)
Full LOCK
Lock all the functions other than reset lock mode, and effective for the purpose to avoid misoperation when controlled.
Normal LOCK
Lock voltage and current setting dial, and effective for the purpose of avoiding changing output setting by mistake or when an easy emergency stop is required.
Remote Control Functions
External output ON/OFF
* +S is common. So external control voltage shall be input with +S as reference. Otherwise, it can cause failure.
Remote sensing
Compensate the voltage drop (V0-VL) due to resistance of output lead or drop of stability by contact resistance.
(maximum 0.5 V)
Digital interface
The R4K-36 features a proprietary digital communication port with modular IN/OUT connections for daisy-chaining. By using a digital interface adapter (sold separately), users can control multiple power supplies simultaneously via LAN, USB, RS-232C, RS-485, or GPIB. This setup also supports master-slave operation, allowing for synchronized control of multiple units.
(A) Modular cable (CO-M cable)
Various Digital Control Functions
| Control function |
Output ON/OFF setting | |
|---|---|---|
| Status output (fault/output/OVP/OCP/OT/ACF/reversible sense connection) |
||
| Maximum 16 units digital control | ||
| Collective control function for multiple units | ||
| Write function | Output voltage setting Output current setting |
|
| OVP setting OCP setting |
|
|
| Reading function | Output voltage reading Output current reading |
|
| Output voltage setting Output current setting |
|
|
| OVP setting/OCP setting |
|
|
* Minimum value of each model is the same as the minimum display of the front panel meter.
* When -LUs1 or -LRmf options are selected, the functions are not provided.
Dual Tracking, Multiple Outputs
Dual tracking control enables both positive and negative outputs simultaneously in master-slave operation.
Multi outputs and various versatile operations are also possible by combining the above dual tracking control and slave local mode. Positive and negative output (+V, -V) of dual tracking control and set output voltage of slave local mode can be output simultaneously by turning on the master unit.
Go to Operations for connection details.
Dual Tracking
Multiple Outputs
Example of Connection and Operation
Using the same multiple units of the R4K-36 series, the output voltage and output current can be increased by connecting the outputs in series or parallel.
Local control or digital master-slave control is recommended for control.
The external output ON/OFF terminal LS- is connected to the + output, so do not connect it to the commons of other power supplies.
Series connection
The total output voltage is up to 250 V.
The output voltage exceeding 250 V is unavailable in a series connection.
The output current will be the smallest value.
Parallel connection
Use the same value for voltage setting in parallel connection.
The output current is the sum of each current.
In order to prevent damage, set the OVP level of all the power supplies to the maximum.
Split connection
Positive and negative outputs are available, respectively.
Two Features in -LDe Option
Function for Pulse & Ramp and Master Follow
Output control as Next A to D is possible.
A. Pulse (Step) Sequence Function
The Sequence function lets you generate complex voltage and current patterns by automatically cycling through settings stored in memories a, b, and c. You can run the sequence continuously or for a specified number of cycles. By setting the duration of any step (a, b, c, or off) to 0.0, you can easily skip steps to create custom test patterns. This flexibility is ideal for product evaluation and reliability testing.
The parameters ta, tb, tc, and toff can be set to 0.0 s, or from 1.0 s to 99.9 h.
B. Ramp Function
The Ramp function provides linear control to gradually increase the output to a set voltage/current, or decrease it to zero. This feature is useful for applications that require a slow power-up or power-down.
* The ramp operation can be applied to: Voltage and Current, Voltage Only, or Current Only.
The t1 and t2 parameters can be set from 0 s to 999 s.
C. Combined Sequence and Ramp
For advanced control, the Sequence and Ramp functions can be used together. This allows you to create complex profiles by smoothly ramping the voltage and/or current between the discrete steps defined in memories a, b, and c. The entire waveform can be run continuously or for a pre-set number of cycles, making it a powerful tool for various testing scenarios.
t1 and t2 can be set from 0 s to 999 s, while ta, tb, tc, and toff can be set to 0.0 s or from 1.0 s to 99.9 h.
D. Master follow (Tracking)
Master-follow is a function that allows a slave equipment to follow the output status of the master equipment in a master-slave connection. The output status of the master equipment is transmitted to the slave equipment to enable interlocked operation. The master and slave can be set to different modes of operation, allowing for complex testing.
* The Master follows function is available only with Matsusada Precision's original digital interface.
Note
- This function cannot be used in conjunction with the delay trigger function.
- Time accuracy in sequence operation is ±0.5%. Take care when using the product in long-term running operations.
Sweep control programmng
Easy programming of sweep operation!
With the -LDe option, the available sweep commands are adapted by setting the arrival time and arrival conditions (voltage/current).
Since there is no need to set commands that are repeated step by step, it is easier to create new programs and change conditions, saving a great deal of operation time. It also contributes to securing time for development, research, etc.
For details, download the datasheet below.
Specifications
- Input voltage
-
115 Vac ±10%, 50/60 Hz, Single-phase
200 Vac ±10%, 50/60 Hz, Single-phase (Option)
230 Vac ±10%, 50/60 Hz, Single-phase (Option) - Output voltage control
-
[Local] Rotary encoder on front panel
[Digital remote] Command (option) - Output current control
-
[Local] Rotary encoder on front panel
[Digital remote] Command (option)
Options
- -LDe
-
Pulse/Ramp sequence, Master follow function
Please refer to Function for Pulse & Ramp Sequence and Master Follow
- -LH
-
High isolation voltage
With an isolation voltage by ±1kV, more R4K-36 series power supplies are available in series connection.
- -LIc
-
Output current accumulation function
Accumulate the output current and display its value (up to 100 Ah). The accumulated value is stored even when the output is off. Also, accumulated values that stop the output can be set preliminarily; it is very suitable for applications such as controlling plating solutions. * Please consider the location of usage. A high-humidity environment can be the cause of failure and corrosion.
- -LRmf *1 *2
-
Analog remote control
Added analog remote control terminal
Output voltage and current can be controlled by external voltage or resistance.
+S is common. So external control voltage shall be input with +S as reference.
- -LUs1 *1 *2
-
USB interface port
Enable digital control with USB. One power supply can be connected to one USB port that the computer is equipped with. In case the number of the USB port of the computer is not enough, use USB HUB. However, it may not work correctly, depending on the USB HUB.OS of USB driver: Microsoft Windows XP/Vista/7/8/10 (Both 32-bit version and 64-bit version are available.)
Microsoft Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
- -L(Mc0.5)
-
Communication cable length 0.5 meters *2
Change the length of the CO-M cable to 0.5 meters, 0.15 meters long. Select one of the two types above.
- -L(Mc0.15)
-
Communication cable length 0.15 meters *2
Change the length of the CO-M cable to 0.5 meters, 0.15 meters long. Select one of the two types above.
- -L(200V)
-
200 Vac ±10% input
Refer Models for input current.
- -L(230V)
-
230 Vac ±10% input Refer Models for input current.
- When these options are selected, the standard digital interface is not provided. They cannot be used together. Therefore, the standard features dual tracking control and multiple outputs are not provided.
- -LUs1 or -LRmf option cannnot be equipped together with -L(Mc0.15) and -L(Mc0.5) option.
How to Order
When ordering, add Option No. to Model No. in alphabetical order followed by numerical order.
Example:
R4K36-1-LDcHIcUs1(200V)
R4K18-2LDeH(Mc0.5)(200V)
Additional Products
- Adapter for digital interface
-
To use the digital interface, you need to prepare a digital interface adapter separately. The following interface adapters are available according to the communication method of your controller port.
- 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
- R4K-36QC
-
Special designed case to bind five-unit of R4K-36 series
Power ON/OFF switch will be consolidated, and also AC input line on rear panel will be bundled to one. Also, handle on the top makes easy to carry.
- RMO series
-
Rack mount shelf
[RMO-133H-RK, RMO-133H-RK2, RMO-133H-RK3]
- Up to 10 units can be installed in the rack shelf for a 19-inch cabinet, and each unit is easily attached and detached.
- It is suitably designed for system operation.
- A forced-air cooling fan is built-in.
- Power supply stand
-
For one unit operation...
- AC Input Cable
-
The R4K-36 series comes with one AC power cord.
Standard CABLE TYPE1 
125 V / 10 A 2.5 meters -L(200V)/-L(230V)
optionCABLE TYPE3 
250 V / 10 A 2.5 meters Sold separately CABLE TYPE4 
250 V / 10 A 2.5 meters Sold separately CABLE TYPE13 
250 V / 10 A 2.5 meters Sold separately CABLE TYPE20 
250 V / 10 A 2.5 meters
- Application software
-
PSS2en series: Remote control, Test workflow design, and Data logging
Click here for the PSS2en seriesPSS2en is the dedicated software that can actuate various power supplies, electronic loads, and digital controllers for power supplies manufactured by Matsusada Precision Inc. with a simple setup.
It is perfect for the aging test, the burn-in test, and the withstand voltage test for electronic parts, as well as for the endurance test, intermittent/continuous operation test, or various simulation tests for automobile electric components.
Dimensions
Download
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-
R4K-36 series Datasheet
Date: 2025-09-23 rev 23
PDF (1,956 KB)
-
DC POWER SUPPLIES SELECTION GUIDE
Date: 2025-06-27 rev.02
PDF (5,265 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
R4K-36 series Instruction Manual
Date: 2025-07-10 rev 1.7
PDF (3,365 KB)
-
R4K-36 series Basic Instruction Manual
Date: 2025-07-10 rev 0.4
PDF (748 KB)
-
USB driver (-LUs1 Option) for Windows 10, 11
Date: 2025-12-19 rev 2.12.36.20
ZIP(1,629KB)
-
USB driver (-LUs1 Option) for Windows XP, 7, 8, 8.1
Date: 2025-01-22 rev 1.7.6
ZIP (6,504 KB)
-
R4K-36 series Outline Drawing (DXF, PDF)
Date: 2024-07-24
ZIP (294 KB)
-
R4K-36 series (-LUs1 option model) 3D MODELS (STEP, IGES)
Date: 2024-11-05
ZIP (5,792 KB)
Login Required
-
R4K-36 series Datasheet
Date: 2025-09-23 rev 23
PDF (1,956 KB)
-
DC POWER SUPPLIES SELECTION GUIDE
Date: 2025-06-27 rev.02
PDF (5,265 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
R4K-36 series Instruction Manual
Date: 2025-07-10 rev 1.7
PDF (3,365 KB)
-
R4K-36 series Basic Instruction Manual
Date: 2025-07-10 rev 0.4
PDF (748 KB)
-
USB driver (-LUs1 Option) for Windows 10, 11
Date: 2025-12-19 rev 2.12.36.20
ZIP(1,629KB)
-
USB driver (-LUs1 Option) for Windows XP, 7, 8, 8.1
Date: 2025-01-22 rev 1.7.6
ZIP (6,504 KB)
-
R4K-36 series Outline Drawing (DXF, PDF)
Date: 2024-07-24
ZIP (294 KB)
-
R4K-36 series (-LUs1 option model) 3D MODELS (STEP, IGES)
Date: 2024-11-05
ZIP (5,792 KB)
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