A51CO24VDC1.6U

Relay Automotive Overview

The A51CO24VDC1.6U is an automotive relay manufactured by CIT Relay and Switch, designed for through-hole mounting on printed circuit boards. It features a single pole double throw (SPDT) contact configuration with one Form C changeover contact. The coil operates at a rated voltage of 24 VDC, drawing 66.7 mA with a resistance of 360 Ohms and consuming 1.6 W of power. The contacts are rated for a maximum switching current of 40 A and a maximum switching voltage of 75 VDC. Constructed with silver tin oxide (AgSnO) contact material, the unit supports a maximum switching power of 630 W. It functions as a single side stable relay without latching capability.

Relay Automotive Feature Summary

• SPDT contact arrangement providing versatile switching control for high-current loads
• Robust 40 A contact rating suitable for demanding automotive electrical applications
• Through-hole PCB mounting design ensuring secure mechanical integration
• Sealed construction protecting internal components from environmental factors

Relay Automotive Applications

• Automotive lighting circuits and accessory control
• High-current load switching in vehicle electrical systems
• Industrial equipment requiring reliable electromechanical isolation
• General purpose power distribution control modules

Relay Automotive Procurement Notes

Verify that the specific part number matches the required SPDT configuration and 24 VDC coil specification before procurement. Confirm that the through-hole footprint aligns with the target PCB layout dimensions. Ensure the operating temperature range meets the environmental requirements of the intended application. Check for RoHS compliance status if restricted substances are prohibited in the manufacturing process. Validate that the 40 A current rating exceeds the peak load requirements to prevent premature contact degradation.

Relay Automotive Selection Notes

Select this component when a changeover contact configuration is necessary for controlling two separate circuits with a single signal. The 24 VDC coil voltage makes it suitable for standard automotive and industrial control systems utilizing that supply rail. Consider the 40 A capacity for heavy-duty loads such as motors or high-intensity lamps. The through-hole package is preferred for applications requiring higher mechanical stability compared to surface mount alternatives. Ensure the 1.6 W coil power consumption fits within the available driver circuit capabilities.

Relay Automotive Part Context

This relay belongs to the CIT automotive relay series, characterized by high current handling and compact form factors. It complements other models in the lineup offering different contact arrangements and coil voltages. The series is widely used in transportation and industrial sectors due to its reliability and certification standards. Variants exist with different terminal styles and contact configurations to suit diverse board space and wiring constraints.

Relay Automotive Replacement Considerations

Direct substitutes must match the SPDT (1 Form C) configuration, 24 VDC coil voltage, and 40 A current rating. Verify that alternative parts support through-hole mounting with compatible pin spacing. Ensure the replacement maintains similar contact material properties and sealing standards for equivalent lifespan.