The HFV4-012-1Z4 is a durable automotive power relay designed for reliable high-current switching and dependable performance in vehicle electrical systems. Featuring a 1 Form C (SPDT / single pole double throw) contact configuration, this relay provides flexible switching between normally open and normally closed circuits, making it ideal for automotive control applications requiring both switching versatility and high current capability.

Operating with a 12VDC coil voltage, the HFV4-012-1Z4 is fully compatible with standard automotive electrical systems and delivers stable switching performance in cars, trucks, motorcycles, utility vehicles, and industrial mobile equipment. Its optimized coil design ensures dependable actuation under varying voltage conditions common in automotive environments.

The relay supports a switching capability of 30A/40A, allowing it to control medium- to high-power electrical loads such as headlights, cooling fans, fuel pumps, horn systems, HVAC blowers, auxiliary lighting, ignition systems, and power distribution circuits. Its robust contact system ensures efficient current transfer and reliable long-term operation under repetitive switching conditions.

Built for automotive durability, the HFV4-012-1Z4 is engineered to withstand vibration, electrical stress, temperature fluctuations, and harsh operating environments. Its rugged internal construction helps maintain stable performance even in demanding under-hood installations and high-load applications.

The relay includes a metal mounting bracket, allowing secure and convenient installation within vehicle electrical systems, fuse boxes, relay panels, and custom wiring assemblies. The bracket improves mechanical stability and helps reduce movement caused by vibration during operation.

Its compact and service-friendly design makes it suitable for both OEM automotive systems and aftermarket vehicle upgrades where reliability, safety, and ease of installation are essential.

Key Features

1 Form C (SPDT / changeover) contact configuration

12VDC coil voltage

High switching capability: 30A/40A

Durable automotive-grade construction

Metal mounting bracket for secure installation

Reliable operation in harsh automotive environments

Suitable for high-current vehicle applications

Compact and easy-to-install design

Typical Applications

Automotive lighting systems

Cooling fan and fuel pump control

Horn and auxiliary power systems

HVAC and blower motor circuits

Ignition and power distribution systems

General automotive switching applications

The HFV4-012-1Z4 combines strong high-current switching performance, rugged automotive reliability, and flexible SPDT functionality, making it an excellent choice for technicians and engineers developing safe, dependable, and long-lasting vehicle electrical systems.

What's in the box
1 x HFV4-012-1Z4 12V Automotive SPDT Relay 30/40A With Metal Bracket