Relay BLOW mpis112a3 12V model 2996# (115f0121hs3) – automotive/universal 12 V relay

BLOW mpis112a3 12V relay (model 2996#, 115f0121hs3) is a 12-volt plug-in electrical relay designed for automotive and general-purpose switching tasks. It provides electrically isolated on/off control using a 12 V coil input and a mechanical contact set for switching loads. The relay is intended for use in vehicle electrical systems, equipment control panels and other installations where a compact, replaceable relay module is required.

Advantages

The relay offers a compact plug-in design that enables quick replacement and integration without soldering. Its 12 V coil is compatible with standard automotive systems and common 12 V control circuits. The mechanical contact arrangement supports switching of lighting circuits, small motors and auxiliary accessories while providing electrical isolation between control and load. The product is intended to be durable under normal automotive conditions and simplifies circuit control when used as a dedicated switching component.

Suitable for

• Switching automotive lighting circuits (headlights, auxiliary lamps)
• Controlling small DC motors and fans
• Activating accessories such as horns, pumps or heaters
• Use in general-purpose 12 V control panels and equipment

Key specifications

• Operating voltage: 12 V DC coil
• Mounting type: plug-in relay (socket-compatible)
• Contact type: mechanical switching contacts suitable for DC loads
• Typical applications: automotive and general-purpose switching
• Form factor: compact module for easy replacement

How to use

Install the relay into a compatible relay socket or holder, ensuring correct pin alignment and secure seating. Connect the 12 V control input to the coil terminals and route load wiring through the relay’s contact terminals according to the wiring diagram of the vehicle or equipment. Verify correct fuse protection and wire gauge for the intended load. After installation, test operation by energizing the control circuit and confirming that the relay actuates and the load switches as expected.

Usage recommendations

Use appropriate fuses and wiring sized for the load current, avoid exposing the relay to prolonged water immersion, and replace the relay with an identical or functionally equivalent plug-in unit if failure is suspected. For reliable operation in automotive environments, confirm compatibility with the vehicle’s socket type and mounting arrangement.