A21ASP24VDC1.9R

Relay Automotive Overview

The A21ASP24VDC1.9R is an automotive relay manufactured by CIT Relay and Switch, featuring a single-pole single-throw normally open (SPST-NO) contact configuration. It operates with a 24VDC coil voltage and supports a maximum switching voltage of 75VDC. The component provides a high current rating of 40A, making it suitable for demanding automotive applications. Designed for through-hole mounting with PC pin termination, it ensures reliable performance within an operating temperature range of -40°C to 125°C.

Relay Automotive Feature Summary

• High current switching capacity up to 40A
• Compact design with lightweight construction
• Compatible with both PCB pin and quick connect mounting options

Relay Automotive Applications

• Automotive electrical systems
• Industrial control circuits
• General purpose switching applications

Relay Automotive Procurement Notes

Verify the specific suffix 'R' against the manufacturer's official documentation to confirm terminal style and packaging variations. Ensure the 24VDC coil voltage matches the system requirements. Confirm that the SPST-NO contact form aligns with the circuit design. Check RoHS compliance status if required for the application environment.

Relay Automotive Selection Notes

Select this component when a 40A switching capacity is required in a compact automotive relay format. The 24VDC coil voltage must match the available control power supply. Consider the through-hole PC pin termination for PCB integration or quick-connect terminals for harness connections. Verify the -40°C to 125°C temperature range meets environmental conditions.

Relay Automotive Part Context

This part belongs to the A21AS series of automotive relays from CIT Relay and Switch. The series is characterized by small size and light weight, designed for high-current switching in vehicle applications. The A21ASP24VDC1.9R specifically denotes the SPST-NO variant with 24VDC coil and 40A rating.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Consult the manufacturer's cross-reference guide for verified alternatives.