DC 12/24V Ceiling PIR Motion Sensor 3A

DC 12/24V Ceiling PIR Motion Sensor 3A is a compact, highly efficient passive infrared motion detector switch designed to automate low-voltage DC lighting systems and electronic appliances. This ceiling-mounted module detects infrared heat energy emitted by moving human bodies and automatically switches connected DC loads. Consequently, it provides an energy-saving solution that eliminates the need for manual wall switches. Furthermore, the sensor supports a wide input voltage range from 12 V DC to 24 V DC, delivering reliable performance across diverse low-voltage setups. Therefore, you can easily integrate this unit into cabinet lighting, strip lights, solar-powered systems, and security installations.

Key Features:

• Automatic Infrared Sensing: Turns connected loads on instantly when human body movement enters the detection field and switches off after a set delay.
• Wide Operating Voltage: Accommodates both 12 V DC and 24 V DC power sources seamlessly without requiring external voltage converters.
• High Switching Capacity: Drives up to 3 A of continuous output current to control LED strip lights, relays, and small DC loads reliably.
• 360° Ceiling Detection: Utilizes a hemispherical Fresnel lens to provide full-cone detection coverage when mounted overhead.
• Energy Efficient Design: Consumes minimal standby power, making it ideal for battery-backed and solar power applications.

Technical Specifications:

• Operating Voltage: DC 12 V to 24 V
• Maximum Load Current: 3 A
• Load Capacity: ≤ 36 W at 12 V DC, ≤ 72 W at 24 V DC
• Quiescent Current: ≤ 50 μA
• Sensing Distance: ≈ 3 m to 5 m
• Sensing Angle: 120° cone angle (≈ 360° ceiling coverage)
• Delay Time: ≈ 15 seconds to 30 seconds (standard factory preset)
• Operating Temperature: -20 °C to +50 °C

Mechanical Specifications:

• Enclosure Material: Flame-retardant ABS Plastic
• Lens Type: High-density Polyethylene Fresnel Dome
• Mounting Method: Embedded ceiling mount or surface snap-in installation
• Connecting Wires: Pre-stripped lead wires for input and output power

Dimensions:

• Overall Housing Diameter: ≈ 40 mm
• Lens Diameter: ≈ 23 mm
• Total Depth: ≈ 35 mm
• Mounting Cutout Hole: ≈ 32 mm

Pinout and Wiring:

• Red Wire (Input V+): Connects to the Positive terminal of the 12V/24V DC power supply.
• Black Wire (Input V- / Ground): Connects to the Negative terminal of the DC power supply and load ground.
• Yellow/White Wire (Output V+): Connects to the Positive load terminal (e.g., LED strip light positive).
• Note: However, reverse polarity can damage internal switching circuitry, so double-check all connections before applying DC power.

Datasheet Reference:

• Download PIR Motion Sensor Datasheet

Commonly Used in:

• Under-Cabinet Lighting: Activating kitchen counter LED light strips upon detecting hand or body motion.
• RV and Automotive Interiors: Controlling 12V cabin lights in recreational vehicles, campers, and boats.
• Closet and Pantry Automation: Illuminating storage spaces automatically when doors open or people approach.

Applications:

• Automatic Lighting Control: Driving low-voltage LED modules in hallways, stairwells, and entryways for hands-free illumination.
• Solar Lighting Systems: Switching off-grid 12V solar lamps to conserve battery power when areas remain unoccupied.
• Security Intrusion Detection: Triggering low-voltage buzzers, sirens, or security monitoring cameras upon human movement.

Equivalent Models:

• HC-SR501 PIR Module: A bare board PIR sensor with adjustable sensitivity and delay, although it requires an external driver transistor for high-current loads.
• DC 12V Inline PIR Switch: A barrel-jack style inline motion detector switch designed for plug-and-play LED strip installations.
• Tmall PIR Ceiling Switch 5A: A higher-power 5A ceiling-mounted sensor module for driving larger DC LED fixtures.

Package Includes:

• 1 x DC 12/24V Ceiling PIR Motion Sensor 3A