A21CCQ24VDC1.9R

Relay Automotive Overview

The A21CCQ24VDC1.9R is a Mini ISO automotive relay manufactured by CIT Relay and Switch, designed for high-current switching in demanding vehicle environments. It features a Single Pole Double Throw (SPDT) contact configuration with a 20A normally open and 15A normally closed rating. The unit operates on a 24VDC coil with a current draw of 79.2mA and consumes 1.9W of power. With a maximum switching capacity up to 40A and a compact form factor, it supports both PCB pin and quick connect mounting options, ensuring reliable performance across various automotive applications.

Relay Automotive Feature Summary

• High switching capacity suitable for heavy loads
• Compact Mini ISO design for space-constrained installations
• Dual mounting flexibility with PCB pins or quick connects

Relay Automotive Applications

• Automotive lighting circuits
• Power distribution modules
• Vehicle accessory control systems

Relay Automotive Procurement Notes

Verify the specific suffix 'R' against official CIT Relay and Switch documentation to confirm the inclusion of integrated components such as flyback diodes or surge suppression, as these variations significantly impact circuit compatibility. Ensure the selected variant matches the required coil voltage and contact configuration for the target application before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component when a robust Mini ISO relay is required for 24VDC automotive systems. Prioritize this model for its ability to handle high continuous currents while maintaining a small footprint. Confirm that the SPDT configuration aligns with the switching logic needs and verify that the available mounting styles fit the designated board or harness layout constraints.

Relay Automotive Part Context

This part belongs to the A Series relays from CIT Relay and Switch, which are engineered for general-purpose and automotive use. The series emphasizes durability and high reliability under harsh conditions. The Mini ISO form factor allows for easy integration into modern vehicle electrical architectures where space efficiency and high current handling are critical requirements.

Relay Automotive Replacement Considerations

Direct substitutes include other Mini ISO relays with identical 24VDC coil specifications and matching SPDT contact ratings. Verify mechanical dimensions and terminal configurations to ensure physical compatibility without modifying existing harnesses or PCB layouts.