AZ9731-1A-12DC4

Relay Automotive Overview

The AZ9731-1A-12DC4 is a 40 Amp Mini-ISO automotive relay manufactured by American Zettler. It features a SPST (1 Form A) contact arrangement with a nominal coil voltage of 12 VDC. The component supports a maximum switched current of 40 A and a maximum switched voltage of 75 VDC for resistive loads. Key electrical parameters include a typical operate time of 7 ms and release time of 5 ms at nominal coil voltage. The dielectric strength is rated at 500 Vrms between the coil and contacts, ensuring robust isolation in automotive environments.

Relay Automotive Feature Summary

• SPST Normally Open contact configuration for single-circuit switching
• Quick connect terminals for simplified harness integration
• Epoxy sealed construction to protect against environmental contaminants
• High momentary carry current capability exceeding steady-state ratings

Relay Automotive Applications

• Automotive power distribution systems
• Headlight and auxiliary lighting control circuits
• Fan and blower motor activation
• General purpose high-current load switching in vehicles

Relay Automotive Procurement Notes

Verify that the specific part number suffix matches the required contact form and coil voltage. Confirm whether the epoxy sealed version is necessary for the intended application environment. Ensure compatibility with standard Mini-ISO relay sockets and quick-connect terminal types used in the target vehicle architecture before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component when a single normally open circuit requires switching up to 40 Amperes at low DC voltages. The Mini-ISO form factor allows for compact mounting in tight engine compartments. Consider the high operating temperature rating if the installation location experiences significant thermal stress during vehicle operation.

Relay Automotive Part Context

This relay belongs to the AZ973 series of Mini-ISO automotive relays designed for heavy-duty applications. The series offers various contact arrangements including SPDT and latched options. The AZ9731 variant specifically denotes the SPST configuration within this standardized automotive relay family produced by American Zettler.

Relay Automotive Replacement Considerations

Compatible substitutes include the AZ973-1A-12DC4 from ZETTLER Electronics GmbH. Verify that the substitute maintains identical pinout, coil voltage, and contact rating specifications to ensure direct interchangeability without circuit modification.