WORLD'S SMALLEST PROGRAMMABLE DC POWER SUPPLY
- Max Voltage: 8V to 36V
- Max Current: 1A to 3A
- Max Power: 24W to 36W
- Ultra Slim
Compact and lightweight design by our original low noise switching technology
The R3K-36 series is an ultra-compact, high-performance DC power supply that delivers a full 36 W of power in a palm-sized form factor. The 35 mm wide ultra slim DC power supply features standard, easy-to-read digital volt and current meters enabling simple operation and easy to use.
Equipped with multi-setting and sink current suppression, this power supply is ideal for automated testing and production lines.
Designed for Maximum Usability
- Designed for Maximum Usability
- Saving space by compact and lightweight design
- Ultra-Low Noise for Demanding Research Applications
- Outstandingly quiet operation with Fanless Power Supply Unit (PSU)
- Standard visual meters are excellent in quickly checking both output voltage and output current
- Speedy settings of output voltage and output current
Ultra compact!
Models
- Ripple values range from 10% to 100% of the rated output.
- You can change the input voltage, refer to options.
| Model | Output | Ripple *1 (rms) | Minimum setting unit | AC input | |||||
|---|---|---|---|---|---|---|---|---|---|
| Voltage [V] |
Current [A] |
Power [W] |
Voltage | Current | Voltage | Current | Voltage *2 | Current [typ.] |
|
| R3K36-1 | 0 to 36 V | 0 to 1 A | 36 W | 5 mV | 5 mA | 100 mV | 10 mA | 115 V ±10% 50/60 Hz single-phase |
1 A |
| R3K18-2 | 0 to 18 V | 0 to 2 A | |||||||
| R3K8-3 | 0 to 8 V | 0 to 3 A | 24 W | 4 mV | 4 mA | 10 mV | |||
Functions
Multi Setting Function
Memorize three voltage and current settings in addition to the standard preset values.
There is no need to readjust the output when switching between different settings, making it a convenient function for production line inspections or experiments that require frequent parameter changes.
Sink Current Suppression
Sink Current Suppression: This function prevents reverse current from flowing back from the load (e.g., batteries or large capacitors) to the power supply. This protects the load from unintended discharge when the output is OFF or the voltage is set lower.
Reverse current cannot be controlled and stabilized. Connect a dummy resistor or reverse current prevention diode when a load of the reverse voltage is equal to or higher than the rated voltage (inductive loads, regenerative motors, etc.)
Two Mode Lock Function
Two modes can be selected; "Full Lock" which locks all front panel operations, and "Standard Lock" which locks all operations except for OUTPUT ON/OFF.
The "Full Lock" mode is ideal for preventing any accidental changes, while the "Standard Lock" mode is useful when you need to prevent setting changes but still allow for emergency turnoff via the front panel. You can select the best mode according to your level of "Security".
(In both modes, an 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 mis-operation when controlled.
Standard Lock
Lock voltage and current setting dial, and effective for the purpose to avoid changing output setting by mistake or when easy emergency stop is required.
Remote Control Functions
External output ON/OFF
* +S is common. The external control voltage shall be input with +S as a reference. Otherwise, it can cause failure.
Remote sensing
Compensates for voltage drops (V0-VL) across the output leads, ensuring precise voltage regulation directly at the load terminals. (maximum 0.5 V)
Specifications
- Input voltage
- 115 Vac ±10%, 50/60 Hz, Single-phase
- Output voltage control
- [Local] Rotary encoder on front panel
- Output current control
- [Local] Rotary encoder on front panel
Options
- -LH
-
Higher isolation voltage
With an isolation voltage of ±1kV, more R3K-36 series power supplies are available in series connection.
- Input voltage change Option
-
- -L(120V): 120 Vac ±10% input
- -L(200V): 200 Vac ±10% input
- -L(220V): 220 Vac ±10% input
- -L(230V): 230 Vac ±10% input
These options cannot be equipped together.
How to Order
When ordering, add Option No. in the following order by alphabet, and input voltage to Model No.
Example: R3K18-2-LH(200V)
Accessories
- AC input cable
-
The R3K-36 series comes with one AC power cord.
Standard CABLE TYPE1 
125 V/10 A 2.5 meters
Fixed length
-L(200V), -L(220V)
and -L(230V) optionsCABLE TYPE3 
250 V/10 A 2.5 meters
Fixed length
Sold separately CABLE TYPE4 
250 V/10 A 2.5 meters
Fixed length
- Case to hold 5 units
-
R4K-36QC Special designed case to bind 5-unit of R3K-36 or R4K-36 series
Power ON/OFF switch will be consolidated, and also AC input line on rear panel will be bundled to one. Also, the 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...
Dimensions
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-
R3K-36 series Datasheet
Date: 2025-11-11 rev 10
PDF (2,018 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
R3K-36 series Basic Instruction Manual
Date: 2024-10-10 rev 00
PDF (534 KB)
Login Required
-
R3K-36 series Datasheet
Date: 2025-11-11 rev 10
PDF (2,018 KB)
-
How to Use DC Power Supplies
Date: 2025-11-11 rev 09
PDF (1,281 KB)
-
R3K-36 series Basic Instruction Manual
Date: 2024-10-10 rev 00
PDF (534 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.
