A21ASP24VDC1.9

Relay Automotive Overview

The A21ASP24VDC1.9 is an automotive relay manufactured by CIT Relay and Switch, designed for through-hole mounting with a non-latching coil type. It features a single pole single throw normally open (SPST-NO) contact configuration, providing reliable switching capacity up to 40A. The coil operates at 24VDC with a current draw of 66.7mA. Key electrical parameters include a must-release voltage of 2.4VDC, an operate time of 7ms, and a release time of 5ms. The unit includes a built-in resistor and is sealed for durability in demanding environments.

Relay Automotive Feature Summary

• High switching capacity rated at 40A for robust power control
• Compact design ensuring small size and light weight
• Integrated resistor and sealed construction for environmental protection

Relay Automotive Applications

• Automotive power management systems
• Vehicle control circuits requiring high current switching
• General electronic equipment needing reliable relay isolation

Relay Automotive Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure the correct variant is selected, as suffixes may indicate differences in packaging or minor specifications. Confirm that the through-hole pin configuration matches your PCB layout requirements before finalizing the procurement order to avoid compatibility issues during assembly.

Relay Automotive Selection Notes

Select this component when a high-current 40A switching capability is required within a compact form factor. Ensure the application circuit supports the 24VDC coil voltage and accounts for the 66.7mA coil current draw. The SPST-NO configuration is suitable for simple on/off control tasks where a normally open state is preferred under normal operating conditions.

Relay Automotive Part Context

This part belongs to CIT Relay and Switch's automotive relay portfolio, which focuses on dependable performance in demanding vehicle applications. The series offers various sizes, contact configurations, and coil options to support diverse power management and control system needs across the automotive industry.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability directly with the manufacturer or authorized distributors if an alternative is required.