A2HM1ASQ24VDC1.6D

Relay Automotive Overview

The A2HM1ASQ24VDC1.6D is an automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications in vehicle electrical systems. It features a sealed construction to protect internal components from environmental factors. The device utilizes a 24VDC coil with a rated power of 1.6W and incorporates a built-in suppression diode for circuit protection. The contact arrangement is SPST-NO (Form A), supporting a maximum switching current of 40A at 14VDC. It employs AgSnO2 contact material to ensure reliable performance under heavy loads.

Relay Automotive Feature Summary

• Sealed design provides environmental protection for automotive use
• Built-in suppression diode protects driving circuits from voltage spikes
• High switching capacity suitable for demanding automotive loads
• Quick-connect terminals facilitate efficient PCB or harness mounting

Relay Automotive Applications

• Automotive lighting circuits
• Heater and fan motor control
• Auxiliary equipment power distribution
• Lamp accessories management

Relay Automotive Procurement Notes

Verify the specific suffix 'D' indicates the inclusion of a suppression diode, as this alters the functional behavior compared to non-diode variants. Confirm that the 24VDC coil rating aligns with the target system voltage. Ensure the 40A contact rating meets the peak load requirements of the intended application. Check for RoHS compliance status if required by regional regulations. Validate package dimensions against available board space.

Relay Automotive Selection Notes

Select this model when a 24VDC control signal is available and a normally open single-pole configuration is required. The integrated diode makes it suitable for direct drive by microcontrollers or ECUs without external flyback protection. Consider the 1.6W coil power consumption for battery drain calculations. Ensure the operating temperature range covers the expected environmental conditions of the installation site.

Relay Automotive Part Context

This component belongs to the CIT A2 series of automotive relays, which are engineered for robust performance in harsh vehicular environments. The series is characterized by compact dimensions and high current handling capabilities. The A2HM variant specifically denotes a sealed housing with quick-connect terminals, distinguishing it from open-frame or plug-in versions within the broader product family.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.