433MHz 1CH RF Relay Receiver Wireless Remote Control Switch

433MHz 1-Channel RF Relay Receiver – Wireless Remote Control Switch Module

Take control of your lighting and electrical devices without running a single wire. The 433MHz 1-Channel RF Relay Receiver is a compact, reliable wireless remote control switch module designed for seamless integration into home automation, DIY electronics projects, and smart switching applications. With its ultra-small footprint of just 22.5 mm × 11 mm × 8 mm, it tucks neatly into enclosures, junction boxes, or custom builds — all while delivering rock-solid 433MHz RF performance.

Why You'll Love This RF Relay Module

• Cord-Free Convenience: Operate lights, fans, or other low-voltage devices wirelessly from a compatible 433MHz remote transmitter — no messy wiring runs needed.
• Single-Channel Relay Control: One dedicated relay channel gives you clean, focused switching control — ideal for on/off light switching, gate openers, and automation triggers.
• Compact Micro Module Design: At only 22.5 × 11 × 8 mm, this module is one of the smallest 433MHz relay receivers available, making it perfect for space-constrained installations.
• 433MHz RF Signal: Operates on the widely adopted 433MHz frequency band, compatible with a broad range of standard RF transmitters and remote controls.
• Durable Plastic Housing: Lightweight yet sturdy plastic construction protects internal components while keeping overall weight minimal.
• DIY & Home Automation Friendly: Easy to integrate into Arduino, Raspberry Pi, or standalone relay-switching projects — a versatile building block for makers and hobbyists.
• Stable Long-Range Reception: Engineered for consistent signal reception across typical indoor and outdoor distances. If range shortens over time, simply test in a new location away from interference sources.

Technical Specifications

Perfect For

• Wireless light switch retrofits
• DIY home automation systems
• Arduino & Raspberry Pi relay projects
• Garage door and gate control
• Remote switching for low-voltage devices

Learn More About RF & Home Automation Standards

For guidance on safe installation of electrical switching devices, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety resources. Electronics hobbyists and engineers can also explore RF communication standards at NIST (National Institute of Standards and Technology).

Frequently Asked Questions

Q: What is the 433MHz 1CH RF Relay Receiver used for?

A: The 433MHz 1CH RF Relay Receiver is a wireless switch module that lets you remotely control lights, fans, or other electrical devices using a compatible 433MHz RF remote transmitter. It is widely used in home automation, DIY electronics, and smart switching projects.

Q: What are the dimensions and materials of this RF relay module?

A: This compact micro module measures 22.5 mm × 11 mm × 8 mm (Length × Width × Height) and is constructed from durable lightweight plastic, making it easy to fit inside enclosures and custom project housings.

Q: What should I do if the wireless range of the module seems reduced?

A: If you notice the remote control distance has decreased, try testing the module in a different location. Wireless signal range can be affected by nearby electronic interference, metal surfaces, or thick walls. Moving the receiver or transmitter even slightly can often restore full operating range.

Q: Is this module compatible with standard 433MHz remotes?

A: Yes. This receiver operates on the widely used 433MHz frequency band, making it broadly compatible with standard 433MHz RF remote transmitters available on the market. Always verify your transmitter's frequency before pairing.

Q: Can this module be used in Arduino or Raspberry Pi projects?

A: Absolutely. The 433MHz 1CH RF Relay Receiver is a popular choice for maker and hobbyist projects, including Arduino and Raspberry Pi automation builds, thanks to its compact size and straightforward relay output.