A2M1CSQ12VDC1.9D

Relay Automotive Overview

The A2M1CSQ12VDC1.9D is a sealed automotive relay manufactured by CIT Relay and Switch, designed for chassis mounting with quick connect terminals. It features an SPDT (1 Form C) contact arrangement rated for high current switching. The coil operates at 12VDC with a power consumption of 1.9W and a resistance of 90 Ohms. Key electrical specifications include a maximum switching voltage of 75VDC, a maximum switching current of 40A, and a contact resistance of less than 30 milliohms initially. The unit supports heavy-duty applications with a switching capacity up to 80A in specific configurations.

Relay Automotive Feature Summary

• Sealed construction suitable for harsh automotive environments
• High switching capacity supporting up to 80A loads
• Versatile mounting options including PCB pins and quick connects

Relay Automotive Applications

• Automotive lighting systems
• Lamp accessories control
• General automotive electrical circuits

Relay Automotive Procurement Notes

Verify the exact coil power rating against the specific datasheet revision, as sources indicate variations between 1.6W and 1.9W for similar part numbers. Confirm the contact arrangement matches the required SPDT configuration. Ensure the quick connect terminal style aligns with existing harness connectors. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Relay Automotive Selection Notes

Select this component when a sealed, high-current automotive relay is required for chassis installation. The 12VDC coil voltage must match the vehicle's electrical system. Consider the 75VDC switching limit and 40A continuous rating for load compatibility. The SPDT configuration allows for both normally open and normally closed circuit control within a single package.

Relay Automotive Part Context

This relay belongs to the CIT A2 series, which includes various automotive relays certified under QS-9000 and ISO-9002 standards. The series is characterized by small size, light weight, and robust switching capabilities. Similar models in the lineup include the A2M1USP12VDC1.6 and A2S1ASQ12VDC1.6, differing primarily in contact arrangement and specific coil power ratings.

Relay Automotive Replacement Considerations

Direct substitutes may include other CIT Automotive Relays from the A2 series with matching 12VDC coil voltage and SPDT contact form. Verify that alternative parts maintain the same 75VDC switching voltage and comparable current ratings. Ensure physical dimensions and terminal types are compatible with the existing mounting bracket and wiring harness.