433MHz Wireless Remote Switch Kit – DC 12V RF Relay Receiver
433MHz Wireless Remote Switch Kit – DC 12V RF Relay Receiver
433MHz Universal Wireless Remote Control Switch Kit – DC 12V 1CH RF Relay Receiver Module
Take full control of your electrical devices without running extra wires. This 433MHz Wireless Remote Control Switch Kit (Model RC-100-B) includes a compact RF relay receiver/controller and a multi-format transmitter (exit button + remote), giving you instant, reliable wireless switching for lighting, electric doors, automated curtains, gate openers, and more — all from up to 50 metres away.
How It Works
The kit uses rolling code encryption (one million unique code combinations) over the 433 MHz RF band, making each transmission uniquely secure. The relay receiver connects directly into your existing wiring and switches loads of up to 10A with dry-contact relay output. Up to 32 transmitters can be paired with a single receiver, making it ideal for shared-access installations.
Key Features
- Frequency: 433 MHz RF with rolling code learning technology
- 1-Channel Relay Output: Dry contact, max load 10A — suitable for most standard electrical equipment
- Dual Operating Modes: Timed (1–255 seconds) or Toggle (ON/OFF flip-flop)
- Multi-Transmitter Support: Pair up to 32 transmitters to one receiver
- Wide Operating Range: Up to ~50 m (environment dependent)
- Receiver Power: DC 12V ±20%; Transmitter: CR2032 3V lithium battery (not included)
- Wide Temperature Range: -40°C to +70°C (-40°F to 158°F)
- Operating Humidity: 10%–88% RH
- Low Power Draw: Receiver idle current <10mA; Exit button <3µA standby
- No App Required: Simple, standalone RF operation — no Wi-Fi or Bluetooth needed
Common Applications
- Wireless light switching
- Electric door / gate / barrier control
- Automated curtain or blind motors
- General-purpose relay switching for home or industrial automation
- Access control panels and exit button installations
What's in the Box
- 1 × RF Relay Receiver/Controller Module (DC 12V)
- 1 × Remote Control Transmitter
- 1 × Exit Button Transmitter
- CR2032 batteries for transmitters not included
Technical Specifications
| Model | RC-100-B |
| Frequency | 433 MHz |
| Channels | 1 |
| Relay Max Load | ≤10A |
| Receiver Voltage | DC 12V ±20% |
| Transmitter Voltage | CR2032 3V (not included) |
| Communication Range | ~50 m (open field) |
| Max Paired Transmitters | 32 |
| Working Modes | Timed (1–255 sec) / Toggle ON/OFF |
| Operating Temp | -40°C to +70°C |
| Humidity | 10%–88% RH |
| Origin | Made in Mainland China |
For guidance on safe electrical wiring and relay installations, refer to OSHA's Electrical Safety Guidelines.
Frequently Asked Questions
Q: How many remote controls can I pair with the 433MHz relay receiver?
A: The RC-100-B receiver supports up to 32 transmitters simultaneously. Each transmitter is paired using the built-in learning code function, making it easy to add or remove remotes as needed.
Q: What is the difference between timed mode and ON/OFF toggle mode?
A: In timed mode, the relay activates for a set duration between 1 and 255 seconds before automatically switching off — ideal for gate openers or timed lighting. In toggle (ON/OFF) mode, one press turns the relay on and the next press turns it off, perfect for permanent light switches or appliance control.
Q: What wire or devices can I connect to this relay switch?
A: The dry-contact relay output handles loads up to 10A, making it compatible with most standard lighting circuits, electric door locks, motor-driven curtains, gate controllers, and other low-to-medium-load electrical equipment. Always ensure your total load does not exceed the 10A rating.
Q: Does this kit require a smartphone app or internet connection?
A: No. This is a fully standalone RF system. There is no app, Wi-Fi, or Bluetooth required — it operates independently over the 433 MHz radio frequency band.