AZ9731-1C-12DC3D2

Relay Automotive Overview

The AZ9731-1C-12DC3D2 is a 40 Amp Mini-ISO automotive relay manufactured by American Zettler. It features a SPDT (1 Form C) contact arrangement with silver tin oxide material. The coil operates on 12V DC input, while the contacts support up to 75V DC and 40A resistive load. Key specifications include a maximum coil voltage of 21V DC, coil resistance of 85 Ω, and dielectric strength of 500 Vrms between coil and contacts. The unit offers high momentary carry current capability and operates at temperatures up to 110°C.

Relay Automotive Feature Summary

• SPDT (1 Form C) contact configuration for versatile switching applications
• Epoxy sealed construction for environmental protection
• Quick connect terminals for simplified installation
• High momentary carry current capacity exceeding nominal rating

Relay Automotive Applications

• Automotive electrical systems
• Industrial control circuits
• Power distribution management

Relay Automotive Procurement Notes

Verify that the specific suffix '3D2' corresponds to the required diode/resistor parallel configuration across the coil as documented in the official datasheet. Confirm physical dimensions and terminal type compatibility with existing mounting brackets or sockets. Ensure the operating temperature range meets the application's thermal requirements before finalizing procurement.

Relay Automotive Selection Notes

Select this model when a SPDT configuration is required for 40 Amp Mini-ISO applications. Consider the epoxy sealed version if environmental sealing is necessary. Verify coil voltage tolerance against the system's power supply stability. Check if the included transient suppression component matches the circuit design needs.

Relay Automotive Part Context

This component belongs to the AZ973 series of Mini-ISO automotive relays from American Zettler. The series includes variants with different contact arrangements such as SPST and SPDT, and various coil voltages. The AZ9731 designation specifically indicates the 40 Amp contact rating within this family.

Relay Automotive Replacement Considerations

Compatible substitutes within the same family include AZ9731-1C-12DC1 and AZ9731-1C-12DC2D2. Verify that any replacement part maintains the same SPDT contact form and 12V DC coil specification. Ensure mechanical fit and terminal alignment are identical to avoid rewiring.