A21ASQ12VDC1.9D

Relay Automotive Overview

The A21ASQ12VDC1.9D is a socketable automotive relay manufactured by CIT Relay and Switch. It features a SPST-NO (Form A) contact arrangement with a 12VDC coil voltage. The component provides a large switching capacity of up to 40A at 14VDC for standard duty cycles. It supports both PCB pin and quick connect mounting options, ensuring versatile integration into vehicle electrical systems.

Relay Automotive Feature Summary

• Socketable design for easy installation and replacement
• SPST-NO contact configuration for single circuit control
• Supports PCB pin and quick connect mounting methods

Relay Automotive Applications

• Automotive lighting circuits
• Accessory power distribution
• General vehicle electrical load switching

Relay Automotive Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm coil voltage, contact form, and terminal style match the intended application requirements. Ensure compatibility with existing socket bases and wiring harnesses before finalizing procurement decisions.

Relay Automotive Selection Notes

Select this model when a socketable relay with a 12VDC coil and 40A switching capacity is required. Confirm that the SPST-NO configuration aligns with the circuit logic and that the physical mounting interface matches the available PCB or panel space constraints.

Relay Automotive Part Context

This component belongs to the CIT automotive relay series designed for high-current switching in vehicles. It utilizes a robust construction suitable for harsh automotive environments, providing reliable performance for accessories and lighting loads within standard automotive electrical architectures.

Relay Automotive Replacement Considerations

Cross-reference with other CIT socketable relays sharing identical coil voltage and contact ratings. Verify mechanical footprint and terminal alignment to ensure direct interchangeability without modifying the host board or wiring harness.

Relay Automotive FAQ

What is the contact arrangement of the A21ASQ12VDC1.9D?

It features a Single Pole Single Throw Normally Open (SPST-NO) contact arrangement.

Is this relay designed for socket mounting?

Yes, the A21ASQ12VDC1.9D is specifically designed as a socketable relay for automotive applications.