A21CCQ12VDC1.6D

Relay Automotive Overview

The A21CCQ12VDC1.6D is an automotive SPDT relay manufactured by CIT Relay and Switch, designed for 12V DC applications with a 40A contact rating. It features a coil voltage of 12VDC, coil power of 1.6W, and coil resistance of 90 Ohms. The switch voltage is rated at 75VDC maximum. Contact material is silver tin oxide (AgSnO2) with initial contact resistance under 30 milliohms. Coil suppression requires a diode (1N4005) with the cathode on terminal 86.

Relay Automotive Feature Summary

• SPDT configuration supporting high current switching up to 40A
• Compact design suitable for PCB pin and quick connect mounting
• Sealed construction for reliable automotive operation

Relay Automotive Applications

• Vehicle electrical systems
• Automotive lighting accessories
• General automotive control circuits

Relay Automotive Procurement Notes

Verify that the specific part number includes the required coil suppression diode configuration if not integrated internally. Confirm socket compatibility for quick connect terminals. Ensure the application environment does not exceed the specified voltage and current ratings to maintain reliability and safety standards.

Relay Automotive Selection Notes

Select this component for applications requiring a 12VDC coil with SPDT functionality and high current capacity. Verify that the 75VDC switch voltage limit aligns with the load requirements. Consider the physical mounting options and ensure adequate space for the relay dimensions and any necessary external suppression components.

Relay Automotive Part Context

This relay belongs to the A Series from CIT Relay and Switch, characterized by large switching capacity and small size. It is certified under QS-9000 and ISO-9002 manufacturing standards, indicating suitability for rigorous automotive industry applications where quality and consistency are critical.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer catalogs for direct equivalents within the A Series or similar automotive relay lines.