What it is
The 433MHz 12V 1-Channel Relay Module with Wireless Remote is a standalone RF switch that lets you turn compatible 12V devices on or off from a distance. It fits home automation, garage door, access control, lighting, alarm, vehicle, enclosure, and retrofit projects where simple 433MHz control is preferred over WiFi or Bluetooth; unlike an Arduino, Raspberry Pi, or ESP32 add-on, this is not an I2C, SPI, or UART module.
Pins
Refer to the silkscreen labels on the board/module and the listing photos for exact pin names. Pinout, terminal layout, and any learn/setup pads can vary by module revision, so check the PCB markings and any datasheet information available for your batch before wiring a 12V load.
Technical Specifications
| Specification | Value |
|---|---|
| Product type | 433MHz RF 1-channel relay module with wireless remote |
| Receiver supply voltage | 12V |
| Channels | 1 |
| Wireless control | 433MHz RF remote operation |
| Remote power | Battery-powered remote control included |
| Connectivity requirement | Standalone operation; no app or internet connection required |
| Typical uses | Home automation, garage doors, access control, lighting, alarms, and general remote power switching |
Frequently Asked Questions
What is this 433MHz 12V 1-channel relay module used for?
It is used to switch compatible 12V devices on or off from a distance with the included 433MHz wireless remote. Common uses include home automation, garage doors, access control, lighting, alarms, vehicles, and retrofit projects.
Does this wireless relay module need WiFi or Bluetooth?
No. It is described as a simple 433MHz RF relay module for standalone remote switching, so it does not rely on WiFi, Bluetooth, an app, or an internet connection for normal use.
Can I use this 433MHz relay module with Arduino, Raspberry Pi, or ESP32?
This product is mainly intended as a standalone RF relay receiver, not as an I2C, SPI, or UART peripheral. If you plan to integrate it into an Arduino, Raspberry Pi, or ESP32 project, verify the board pinout and wiring from the silkscreen, listing photos, and any datasheet information before making changes.
What voltage does the relay receiver use, and how is the remote powered?
The relay receiver is described as a 12V module. The included remote is battery-powered.
How do I identify the pinout or wiring terminals on this relay board?
Check the PCB silkscreen labels and the product listing photos for the exact terminal and pin names on your version. Layout details can vary by module revision, so do not rely on a generic pinout without confirming the markings on the board.