AZ9731-1C-24DC4

Relay Automotive Overview

The AZ9731-1C-24DC4 is a 40 Amp Mini-ISO automotive relay manufactured by American Zettler. It features a 24VDC coil with a nominal rating and operates within a maximum DC coil voltage of 31.2VDC. The SPDT (1 Form C) contact arrangement supports a maximum switched current of 40A at 75VDC resistive load, delivering up to 630W power. Key electrical parameters include a coil resistance of 360 Ω, contact resistance of 100 mΩ, and dielectric strength of 500 Vrms between coil and contacts. The device is epoxy sealed and designed for chassis mounting.

Relay Automotive Feature Summary

• SPDT (1 Form C) contact configuration providing normally open and normally closed switching paths
• Epoxy sealed construction ensuring environmental protection against moisture and contaminants
• Quick connect terminals facilitating rapid installation and maintenance in vehicle systems
• High momentary carry current capability supporting transient loads up to 60A

Relay Automotive Applications

• Automotive power trim and tilt systems
• Vehicle lighting circuits
• Heater and blower motor control
• General automotive accessory power distribution

Relay Automotive Procurement Notes

Verify the specific ordering suffix to confirm coil voltage, contact arrangement, and terminal type match system requirements. Ensure the epoxy sealed variant is selected if environmental exposure is expected. Confirm RoHS compliance status through official documentation prior to integration. Cross-reference pinout diagrams with existing harness connectors to prevent wiring mismatches during assembly.

Relay Automotive Selection Notes

Select this model for applications requiring a 24VDC control signal and high-current switching capacity. The SPDT configuration allows for complex circuit logic compared to single-pole alternatives. Consider the physical dimensions and bracket availability when designing enclosure layouts. Evaluate thermal management needs given the 110°C operating temperature limit under continuous load conditions.

Relay Automotive Part Context

This component belongs to the AZ973 series of Mini-ISO automotive relays from American Zettler. The series offers various coil voltages and contact arrangements including SPST and SPDT options. The AZ9731 variant specifically denotes the SPDT configuration with quick-connect terminals, distinguishing it from plug-in or screw-terminal versions within the broader product family.

Relay Automotive Replacement Considerations

Direct substitutes within the same series include AZ9731-1C-12DC4 for 12VDC coil applications. Verify that replacement parts maintain identical contact ratings, coil resistance, and physical footprint to ensure compatibility with existing mounting brackets and connector housings.