A2S1ASQ12VDC1.9D

Relay Automotive Overview

The A2S1ASQ12VDC1.9D is an automotive SPST-NO relay from CIT Relay and Switch, rated for 40A at 14VDC with a maximum switching voltage of 75VDC. It operates on a 12VDC coil with a resistance of 90 Ohms and power consumption of 1.9W. The unit measures 26.0 x 26.0 x 24.5 (39.5) mm, features AgSnO2 contacts with less than 30 milliohms initial resistance, and supports quick connect mounting.

Relay Automotive Feature Summary

• Large switching capacity up to 40A
• Small size and light weight design
• Quick connect mounting available

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories

Relay Automotive Procurement Notes

Verify the specific suffix '1.9D' against official CIT documentation to confirm coil power rating and terminal configuration. Ensure compatibility with existing PCB footprints or bracket mounts. Confirm RoHS compliance status and manufacturing certifications such as QS-9000 or ISO-9002 if required by your supply chain standards before finalizing procurement.

Relay Automotive Selection Notes

Select this component for applications requiring high current handling in compact automotive spaces. The 12VDC coil voltage aligns with standard vehicle electrical architectures. Consider the 40A contact rating for heavy loads like lighting or starter circuits. Verify that the quick connect interface matches the harness connectors used in the target assembly to ensure reliable mechanical and electrical connections.

Relay Automotive Part Context

This part belongs to the CIT A2 series of automotive relays, designed for robust performance in demanding environments. The series is certified under QS-9000 and ISO-9002 standards, ensuring consistent quality for automotive and lamp accessory applications. The A2 series offers various contact arrangements and coil voltages to suit diverse system requirements.

Relay Automotive Replacement Considerations

Compatible substitutes within the same family include A2S1ASQ12VDC1.6R and A2M1USP12VDC1.6, provided the coil power and physical dimensions are verified. Ensure the replacement maintains the SPST-NO configuration and 40A current rating. Cross-reference datasheets to confirm identical mounting styles and terminal types.