A2M1CSQ12VDC1.9R

Relay Automotive Overview

The A2M1CSQ12VDC1.9R is a sealed automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a non-latching coil with a rated voltage of 12VDC and a maximum power consumption of 1.9W. The contact arrangement is SPDT (Form C), capable of handling up to 40A at 14VDC. Key electrical specifications include a maximum switching voltage of 75VDC, initial contact resistance below 30 milliohms, and AgSnO2 contact material. The unit measures 26.0 x 26.0 x 24.5 mm and supports PCB pin or quick connect mounting.

Relay Automotive Feature Summary

• Sealed construction suitable for automotive environments
• High switching capacity up to 40A
• Compact size with lightweight design
• Flexible mounting via PCB pins or quick connects

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• General purpose industrial switching

Relay Automotive Procurement Notes

Verify the specific coil power rating of 1.9W against system requirements. Confirm the SPDT contact configuration matches the circuit logic. Ensure the 12VDC coil voltage aligns with the supply source. Check that the 40A current rating satisfies the load demands. Validate the quick connect termination style for compatibility with existing harnesses.

Relay Automotive Selection Notes

Select this model when a sealed relay with 40A capacity is required. The 1.9W coil power indicates higher drive current compared to lower-wattage variants. The SPDT form allows for both normally open and normally closed functions in one package. Consider the physical dimensions for enclosure space constraints. Verify environmental ratings if operating in extreme temperatures.

Relay Automotive Part Context

This component belongs to the CIT A Series relays, which are certified under QS-9000 and ISO-9002 standards. The series is characterized by large switching capacities and small footprints. The A2M1 variant specifically denotes a sealed automotive relay with metal bracket options. It is part of a broader family including similar models like A2M1USP12VDC1.6 with different coil powers.

Relay Automotive Replacement Considerations

Direct substitutes may include A2M1CSQ12VDC1.6R or A2M1CSQ12VDC1.9, provided the coil power difference is acceptable. Verify that the contact arrangement and current ratings remain identical. Ensure the mounting style and terminal type match the existing assembly. Cross-reference the datasheet for any changes in contact material or resistance.