A21CCQ24VDC1.6

Relay Automotive Overview

The A21CCQ24VDC1.6 is a sealed automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a 24 VDC coil voltage with a maximum switching power of 630W and a maximum switching voltage of 75VDC. The contact arrangement is SPDT (1 Form C), supporting a maximum switching current of 40A. The unit utilizes AgSnO2 contact material with an initial contact resistance of less than 30 milliohms. Physical dimensions are 26.0 x 26.0 x 24.5 mm, and it supports both PCB pin and quick connect mounting options.

Relay Automotive Feature Summary

• Large switching capacity up to 40A
• Small size and light weight design
• Suitable for automobile and lamp accessories

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessory control circuits
• General purpose high-current switching

Relay Automotive Procurement Notes

Verify the specific contact configuration suffix against the datasheet to ensure compatibility with the target circuit requirements. Confirm that the operating temperature range aligns with the intended environmental conditions. Check for RoHS compliance status if restricted substances are a concern for the assembly process. Ensure the mounting style matches the available board space or socket infrastructure.

Relay Automotive Selection Notes

Select this component when a compact form factor is required alongside high current handling capabilities in automotive environments. The sealed construction provides protection against environmental factors compared to open relays. Consider the 24VDC coil requirement and the SPDT configuration needs before finalizing the design. Evaluate the physical dimensions to ensure fitment within the designated enclosure or chassis area.

Relay Automotive Part Context

This model belongs to the A21 series of automotive relays from CIT Relay and Switch. The series is characterized by its robust construction and suitability for demanding vehicle applications. It represents a standard solution for managing high-power loads in modern automotive architectures where space and reliability are critical constraints.

Relay Automotive Replacement Considerations

Cross-reference part numbers such as A21CSP24VDC1.6D1 or A2M1USP12VDC1.6 for similar specifications. Verify coil voltage and contact rating equivalence before substitution. Ensure mechanical footprint compatibility to avoid rework on existing PCB layouts.