HFKM-024-SHST 24V Automotive PCB Relay 20A SPST Vertical Relay

The HFKM-024-SHST is a compact automotive-grade PCB relay designed for reliable medium-to-high current switching, durability, and safe electrical isolation in 24V vehicle and industrial systems. Featuring a Form 1U (SPST / single pole configuration) contact design, this relay is suitable for a wide range of automotive control and power switching applications where stability and long service life are essential.

Operating with a 24VDC coil voltage and a 520 coil resistance, the relay provides efficient coil performance with low power consumption while ensuring stable and consistent actuation in standard 24V automotive and industrial electrical systems. Its optimized coil design supports reliable switching even under fluctuating supply conditions.

The HFKM-024-SHST supports a maximum switching current of 20A, making it suitable for controlling medium-to-high power loads such as lighting systems, cooling fans, fuel pumps, HVAC blowers, heaters, and other automotive electrical accessories. Its robust contact system ensures dependable current handling with minimal voltage drop and stable performance over time.

Built with AgSnO (silver tin oxide) contact material, the relay offers excellent resistance to arc erosion, reduced contact wear, and extended operational lifespan. This makes it ideal for high-cycle switching applications where durability and reliability are critical.

The relay features a plastic-sealed housing, providing protection against dust, moisture, vibration, and other environmental contaminants commonly found in automotive and industrial environments. This ensures long-term reliability even in harsh operating conditions.

With a compact vertical PCB mounting design (15 × 17.5 × 19.5 mm) and 5-pin termination, the HFKM-024-SHST allows easy integration into automotive control modules, relay boards, and compact electronic assemblies. Its small footprint makes it ideal for space-constrained applications.

The relay also provides 500V coil-to-contact isolation, ensuring safe separation between control and load circuits, protecting sensitive electronics from electrical transients and improving overall system safety.

Key Features

• Form 1U (SPST / single pole configuration)
• 24VDC coil voltage
• 20A high switching capacity
• 520 coil resistance (efficient low-power operation)
• AgSnO contact material for durability and arc resistance
• Plastic-sealed construction for environmental protection
• 500V isolation voltage between coil and contacts
• Compact vertical PCB mount design
• 5-pin configuration
• Automotive-grade reliability

Typical Applications

• Automotive electrical systems (24V vehicles)
• Engine control and power distribution modules
• Cooling fan and HVAC systems
• Lighting and auxiliary power circuits
• Fuel pump and actuator control
• Industrial 24V control systems

The HFKM-024-SHST delivers robust 20A switching performance, strong environmental protection, and efficient 24V operation, making it a dependable solution for engineers designing reliable automotive and industrial power control systems.

What's in the box
1 x HFKM-024-SHST 24V Automotive PCB Relay 20A SPST Vertical Relay