The MHSR602 is an ultracompact, lowpower PIR (Pyroelectric Infrared) motion sensor module designed to detect human body movement within a range of up to 5 meters. Its tiny 15x15mm footprint and 20µA quiescent current make it ideal for batterypowered and space-constrained projects like smart lighting, security alarms, and automatic door systems, working seamlessly with Arduino and other microcontrollers [citation:1][citation:2][citation:13].
| Parameter | Value |
|---|---|
| Model | SR602 |
| Supply Voltage | 3.3V to 15V DC |
| Quiescent Current | 20µA |
| Output Logic | High: 3.3V / Low: 0V |
| Detection Range | Up to 5 meters (recommended 0-3.5m) |
| Detection Angle | 100° |
| Output Delay Time | Factory set to 2.5 seconds (adjustable) [citation:1][citation:2] |
## Key Features
+High Sensitivity, Fast Response Reliable motion detection with a compact, easyto-install design.
+Adjustable Delay The highlevel output time can be modified from 2.5 seconds to 1 hour by changing a chip resistor, allowing for long-duration triggers [citation:1][citation:8].
+Repeatable Trigger - The timer resets with each new detection, ensuring devices stay active as long as motion is present [citation:6][citation:8].
+Photosensitive Option - The module has a footprint for adding a photodiode, allowing it to be configured to operate only at night [citation:6][citation:9].
# Applications
## Connection Guide
| Pin | Description |
|---|---|
| + (VCC) | Power supply (3.3V to 15V DC) |
| - (GND) | Circuit Ground (0V) |
| OUT | Digital Signal Output (3.3V / 0V) |
> This module is exceptional for battery-powered projects due to its 20µA quiescent current, which is significantly lower than other common PIR sensors [citation:6].
## Troubleshooting
False triggers or inconsistent readings: