A151US12VDC

Relay Automotive Overview

The A151US12VDC is an automotive electromechanical relay manufactured by CIT Relay and Switch. It features a SPST N.O. contact arrangement (1U) with a maximum switching current of 20A at 14VDC. The coil operates at 12VDC with a resistance of 210 ohms and a coil current of 57.1 mA. The device supports a maximum switching voltage of 20VDC and has a maximum switching power of 150W. Contact material is AgSnO, with initial contact resistance under 30 milliohms.

Relay Automotive Feature Summary

• SPST N.O. contact configuration for single-circuit control
• Automotive-grade design suitable for vehicle electrical systems
• Non-latching coil operation for standard relay functionality

Relay Automotive Applications

• Automotive lighting circuits
• Vehicle accessory power management
• General purpose automotive switching applications

Relay Automotive Procurement Notes

Verify the specific datasheet version to confirm coil resistance and current ratings, as values may vary between documentation editions. Ensure the 1U contact arrangement matches the required circuit topology. Confirm RoHS compliance status if environmental regulations apply to the end product assembly.

Relay Automotive Selection Notes

Select this model when a 20A SPST N.O. switch is required for 12VDC automotive environments. The 210-ohm coil resistance limits current draw to approximately 57mA, reducing load on control circuits. Compare against higher-current alternatives like the A161 series if loads exceed 20A.

Relay Automotive Part Context

This component belongs to CIT's automotive relay lineup, designed for reliability in vehicular applications. It complements other models such as the A151CS12VDC (SPDT) and A161 series (higher capacity). The product line emphasizes compact form factors and certified manufacturing standards for automotive integration.

Relay Automotive Replacement Considerations

The A151CS12VDC offers SPDT functionality instead of SPST. For higher current requirements, consider the A161 series. Verify pinout compatibility before substituting with generic equivalents, as coil resistance and contact ratings must match system specifications.