USB Relay Controller, 1 Contact Form C,10A 250V AC 24V DC, Bus-Powered
- SKU:
- 358
- Manufacturer:
- Tokyo Devices
- Model Number:
- TDFA30301
- EAN:
- 4560457401394
- Released on:
- Dec 2025
- Category:
- Relay and Digital I/O
TDFA30301 is a simple USB-controlled relay board. It allows you to switch 12/24VDC, or 100/250VAC loads via USB. It can be controlled from both Windows and Linux.
- Operates via USB connection (bus-powered). It can also be used with board computers such as Raspberry Pi and Armadillo.
- The relay contact rating supports 10 A / 250 VAC or 10 A / 24 VDC, making it ideal for controlling commercial AC mains or 12/24-V systems via USB.
- A single PC can control multiple devices. By using a USB hub, several dozen units can be connected.
- Simple control commands for Windows and Linux are provided, making integration into applications straightforward.
- Suitable for industrial, research, and security applications.
- Provided as a compact board module enclosed in protective resin.
- All components, including the relay and terminal block, are high-reliability parts from industrial manufacturers. Designed in Japan.
- Mass production, customization, and support services are available.
Usage
The terminal block provides three terminals: NO, COM, and NC. When the relay is ON, the COM–NO path is closed and COM–NC is open. When the relay is OFF, the COM–NO path is open and COM–NC is closed.
Control from USB is performed using the Tokyo Devices standard command set TD-USB.
(Turn the relay ON)
> td-usb tdfa30301 set 1
(Turn the relay OFF)
> td-usb tdfa30301 set 0
To use the device from your own application, call TD-USB as an external command. It can be used from Python, shell scripts, C#, LabVIEW, and others. See the TD-USB documentation samples for details.
Package Contents
- Relay module
- USB cable (1.5 m)
Specifications
| Item | Value |
|---|---|
| Relay rating | 250 V AC 10 A, 24 V DC 10 A |
| Contact type | 1c (SPDT-CO) |
| Terminal specification | Screw type, 0.75–2.5 mm² / 26–14 AWG |
| Communication | USB 2.0 Full Speed |
| Current consumption | 100 mA max. |
| Dimensions | 63.5 × 24 × 20 mm (excluding cable) |
| Power supply | USB bus-power |
| Supported OS | Windows 7 or later (64-bit) / Linux |
| Included USB cable | 1.5 m |
Search Keywords
USB relay control, serial port relay control, Raspberry Pi relay, Linux relay, Android relay, Windows relay control
Documents and software
- open_in_new TD-USB: Control Command (Windows/Linux)
-
TDFA30301 Datasheet 1.0 (JA) 692 KB
-
TDFA30301 Datasheet 1.0 (EN) 619 KB
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In Stock: 1
| Qty | Price |
|---|---|
| 1 | 35.57 USD |
| 10 | 33.43 USD |
| 100 | 30.57 USD |
