A21ASQ12VDC1.6

Relay Automotive Overview

The A21ASQ12VDC1.6 is a sealed automotive relay from the CIT A2 series, designed for high-current switching applications. It features an SPST-NO contact configuration rated for up to 40A at 14VDC and a maximum switching voltage of 75VDC. The unit utilizes a 12VDC coil with a resistance of 90 Ohms and a power consumption of 1.6W. Constructed with AgSnO2 contacts, it offers low initial contact resistance below 30 milliohms. The relay supports quick connect mounting and operates within a temperature range of -40°C to 125°C.

Relay Automotive Feature Summary

• Sealed construction suitable for harsh automotive environments
• High switching capacity up to 40A for heavy load control
• Compact design with lightweight form factor
• Versatile mounting options including PCB pins and quick connects

Relay Automotive Applications

• Automotive lighting circuits
• Lamp accessories control
• General automotive electrical load switching

Relay Automotive Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to ensure compatibility with required coil voltage and contact configuration. Confirm that the selected variant matches the intended application requirements regarding current rating and mounting style. Cross-reference part numbers with official CIT Relay and Switch documentation to avoid discrepancies in specifications or availability status.

Relay Automotive Selection Notes

Select this component when a robust, sealed relay is required for automotive systems handling loads up to 40A. Ensure the 12VDC coil voltage aligns with the vehicle's electrical system. Consider the physical dimensions and mounting type (quick connect vs. PCB pin) during board layout or harness design. Verify thermal management needs given the operating temperature range and power dissipation characteristics.

Relay Automotive Part Context

This model belongs to the CIT A2 series of automotive relays, which are characterized by their small size and large switching capacity. The series is certified under QS-9000 and ISO-9002 standards, indicating adherence to quality manufacturing processes. These relays are engineered specifically for the demands of automobile and lamp accessory applications, offering reliability in demanding conditions.

Relay Automotive Replacement Considerations

Direct substitutes within the same series include variants with different contact forms such as A21CSQ12VDC1.6 (SPDT). Ensure any replacement maintains the 12VDC coil specification and 40A current rating. Verify that the physical footprint and terminal configuration match the existing design constraints before substitution.