Motion sensor Panasonic AMN31111J — PIR detector, AMN3 series, fingerhut housing, 3–6 V DC

Panasonic AMN31111J is a passive infrared (PIR) motion sensor from the AMN3 series, supplied for operation on 3–6 V DC and housed in a fingerhut-style package. The device detects changes in infrared radiation caused by human presence and movement, producing a reliable electrical signal for integration into low-voltage or battery-powered systems. Its compact form factor and low-voltage operation make it suitable for embedded electronics, portable monitoring modules, and security or automation circuits requiring efficient motion sensing.

Advantages

The sensor offers passive infrared detection with low power consumption compatible with 3–6 V DC supplies, enabling battery operation and reduced system energy draw. Its fingerhut housing provides compact dimensions for tight installation spaces and simple mechanical integration. The AMN3-series design provides stable motion detection performance and straightforward electrical interfacing for control circuits and monitoring modules.

Suitable for

• Battery-powered presence detectors and portable alarm units
• Low-voltage access control and security systems
• Embedded electronics with motion-triggered functions
• Automation and energy-saving lighting controls
• Prototyping and integration in custom monitoring modules

Key specifications

• Detection principle: passive infrared (PIR)
• Operating supply voltage: 3–6 V DC
• Housing type: fingerhut-style compact package
• Application: motion and presence detection for low-voltage systems
• Suitable for battery operation and portable devices

How to use

Install the sensor in a position with an unobstructed field of view toward the monitored area and avoid pointing it directly at heat sources or reflective surfaces that can affect infrared measurements. Connect the sensor to a compatible power source in the 3–6 V DC range and interface its output with the system’s detection input or microcontroller. Observe correct polarity when wiring and provide any recommended decoupling or filtering on the supply line to maintain stable operation. Test detection range and response in the final installation environment and adjust mounting orientation to optimize coverage.

Recommendations

For reliable long-term performance, use stable 3–6 V DC supplies and minimize exposure to direct sunlight or strong infrared emitters. When integrating into battery-powered designs, implement power management strategies such as duty cycling or wake-on-motion logic to extend battery life. Verify detection behavior during installation to confirm coverage and reduce false triggers from nearby heat sources or moving objects unrelated to human presence.