A2M1ASQ24VDC1.9D

Relay Automotive Overview

The A2M1ASQ24VDC1.9D is an automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a SPST-NO contact configuration with a maximum switching current of 40A at 14VDC. The coil operates at a rated voltage of 24VDC, drawing approximately 79.2 mA. Key electrical specifications include a maximum switching voltage of 75VDC and a maximum switching power of 630W. The unit utilizes AgSnO2 contact material with initial contact resistance below 30 milliohms.

Relay Automotive Feature Summary

• High switching capacity suitable for demanding automotive loads
• Compact design optimized for space-constrained installations
• Quick connect mounting facilitates rapid assembly

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• General automotive load switching

Relay Automotive Procurement Notes

Verify the specific suffix '1.9D' against official CIT documentation to confirm the inclusion of internal components such as diodes or resistors, as these affect circuit behavior. Ensure the 24VDC coil voltage matches the target system supply. Confirm that the 40A contact rating aligns with the peak load requirements of the intended application to prevent premature failure.

Relay Automotive Selection Notes

Select this model when a single-pole normally-open configuration is required for 24VDC automotive circuits. The 40A rating supports heavy loads compared to standard relays. Consider the quick-connect termination style for ease of installation in harnesses. Verify physical dimensions against available panel or box space before finalizing the design.

Relay Automotive Part Context

This component belongs to the CIT A2 series of automotive relays, which are characterized by robust construction and compliance with QS-9000 and ISO-9002 manufacturing standards. The series is widely used in vehicle electrical architectures where reliability under vibration and thermal stress is critical. The A2M1 variant specifically denotes the SPST-NO form factor within this product line.

Relay Automotive Replacement Considerations

Direct substitutes may include the A2M1ASQ24VDC1.6D if the internal circuitry differences are compatible with the application. Other models in the A2M1 series with different coil voltages can be considered if the system voltage is adjusted accordingly. Always verify pinout compatibility and mechanical footprint before swapping.