A21ASQ24VDC1.9

Relay Automotive Overview

The A21ASQ24VDC1.9 is an automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a coil voltage of 24VDC with a power consumption of 1.9W and a resistance of 303.2 Ohms. The relay utilizes Silver Tin Oxide (AgSnO) contact material to ensure durability under heavy loads. It offers a large switching capacity up to 40A and supports both PCB pin and quick connect mounting options, combining significant current handling capability with a compact, lightweight form factor suitable for space-constrained automotive environments.

Relay Automotive Feature Summary

• High switching capacity up to 40A
• Compact size and light weight design
• Flexible mounting via PCB pins or quick connects

Relay Automotive Applications

• Automotive electrical systems
• High-current circuit switching
• Vehicle accessory control modules

Relay Automotive Procurement Notes

Verify the specific datasheet version when sourcing this component, as manufacturing updates may occur. Confirm that the Silver Tin Oxide contact material aligns with your application's arcing requirements. Ensure the selected mounting style matches your board layout or harness design constraints before finalizing procurement orders.

Relay Automotive Selection Notes

Select this model when a 24VDC coil drive is required alongside substantial current handling capabilities. The choice between PCB pin and quick connect interfaces should depend on the assembly method and maintenance accessibility needs of the target system. Consider the physical dimensions carefully to ensure compatibility with the available enclosure space.

Relay Automotive Part Context

This component belongs to the A Series Relays line from CIT Relay and Switch, which focuses on automotive-grade solutions. The series emphasizes robust performance in demanding vehicular environments while maintaining a small footprint. It complements other models like the A21ACQP24VDC1.9 within the manufacturer's portfolio of high-capacity switching devices.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with caution if considering alternatives from other manufacturers.