A21CCQ12VDC1.9D

Relay Automotive Overview

The A21CCQ12VDC1.9D is an automotive relay manufactured by CIT Relay and Switch, designed for high-capacity switching in demanding environments. It features a Single Pole Double Throw (SPDT) contact configuration capable of handling up to 40 Amperes. The unit operates on a 12V DC coil voltage with a power consumption of 1.9 Watts. Key electrical parameters include a maximum continuous voltage rating of 15.6 VDC and a coil resistance of approximately 90 Ohms with a tolerance of +/- 10%. The pick-up voltage is defined as a maximum of 70% of the rated voltage, equating to 8.4 VDC. This component utilizes quick connect mounting terminals and includes a dust cover for enhanced protection.

Relay Automotive Feature Summary

• High current switching capacity suitable for heavy-duty automotive loads
• Compact design optimized for space-constrained vehicle applications
• Integrated dust cover for environmental protection
• Flexible mounting options including PCB pins and quick connect terminals

Relay Automotive Applications

• Automotive power distribution systems
• Vehicle lighting control circuits
• General automotive load management

Relay Automotive Procurement Notes

Verify the specific suffix 'D' corresponds to the inclusion of the dust cover and diode configuration when sourcing replacements. Confirm that the 1.9W coil power rating aligns with the vehicle's available power supply capacity. Ensure the quick connect terminal style matches existing harness connectors. Cross-reference the 40A rating against peak load requirements to prevent thermal overload during operation.

Relay Automotive Selection Notes

Select this model for applications requiring robust 40A switching within standard 12V automotive architectures. The SPDT configuration offers versatility for controlling two separate circuits or providing a common connection point. Consider the physical dimensions and quick connect interface compatibility before integration. The included dust cover makes it suitable for under-hood or exposed mounting locations where debris ingress is a concern.

Relay Automotive Part Context

This component belongs to the A21 series of automotive relays from CIT Relay and Switch. The series is characterized by small size and light weight while maintaining high reliability. These relays are engineered to withstand harsh operating conditions typical in modern vehicles, offering a balance of performance and durability for critical electrical systems.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers: A21CCQ12VDC1.6D, A21CCQ12VDC1.6DT.