QIACHIP RX18211A-4 Instruction Manual DC 2V-5V 433MHz RF Superheterodyne Wireless Receiver Module
Version: V1.0
Last Updated: 2026-2-28
Model: RX18211A-4
Product Size
- Receiver Length (L) x Width (W) x Height (H): 31.5mm x 11.5mm x 1mm
- Receiver Pin header pitch: 2.5 mm
Component Description
- 1: +5V (Power Input Pin)
- 2: DAT (Signal output pin)
- 3: GND (Power Ground Pin)
- 4: GND (Power Ground Pin)
- 5: ANT (Antenna Pin)
Antenna Size
General Application Type
For general applications, you can directly use the market-standard specifications for the antenna. Details of the 433MHz antenna are as follows:
- Wire length at the soldering end: 10mm
- Total straight length of the antenna wire: 170mm
- Number of winding turns: 9 turns
Special Enhanced Type
If a longer communication distance is required and the general application type antenna cannot meet the demand, an enhanced type antenna can be used to improve the receiving distance. Details of the 433MHz antenna are as follows:
- Antenna core diameter (including outer sheath): 1.0 mm
- Antenna core diameter (excluding outer sheath): 0.35 mm
- Wire length at the soldering end: 12 mm
- Antenna winding diameter (excluding outer sheath): 3.0 mm
- Number of winding turns: 26 turns
- Winding length: 36 mm
Electrical characteristics
| Parameter | Value |
|---|---|
| Input voltage | DC 2.0V-5.0V |
| RF frequency | 433.92MHz |
| Power Consumption | 5mA |
| Receiving Bandwidth | 300KHz |
| Receiver sensitivity | -112dBm |
| Working temperature | -10~60℃ |
| Size | 31.5x11.5x1mm |
NOTE
- This product is a CMOS device. Please take anti-static precautions during storage, transportation and operation.
- Ensure proper grounding when using the device.
- RF devices are voltage-sensitive. If the power supply is unstable or has significant ripple, add filtering at the power input terminal to ensure the supply voltage does not exceed the product's maximum operating voltage.