AZ9731-1A-48DC2D1

Relay Automotive Overview

The AZ9731-1A-48DC2D1 is a 40 Amp Mini-ISO automotive relay manufactured by American Zettler. It features a Single Pole Single Throw (SPST) contact configuration rated for 48V DC coil operation with a current draw of 33.3 mA. The unit operates within a temperature range of -40°C to 125°C and exhibits a contact resistance of 100mΩ. Physical dimensions are 49.9mm x 26.5mm x 26.5mm, designed for panel or socket mounting using connector leads.

Relay Automotive Feature Summary

• High current capacity of 40 Amps suitable for demanding automotive loads
• Mini-ISO form factor compatible with standard automotive sockets
• Robust thermal performance operating up to 125°C
• Non-latching electromagnetic coil design

Relay Automotive Applications

• Automotive lighting circuits
• Heater and blower motor control
• Fuel pump power distribution
• General high-current vehicle accessory switching

Relay Automotive Procurement Notes

Verify the specific suffix codes against the manufacturer datasheet to ensure correct coil voltage and contact configuration. Confirm that the required 48V DC coil specification matches the target system architecture. Check physical compatibility with existing Mini-ISO sockets and verify lead type requirements for the intended panel or PCB assembly method before finalizing orders.

Relay Automotive Selection Notes

Select this component when a 40 Amp SPST switching capability is required in a compact Mini-ISO package. Ensure the application environment supports the specified -40°C to 125°C operating temperature range. Verify that the 48V DC coil voltage aligns with the vehicle's electrical system to prevent under-driving or over-heating of the coil circuit during continuous operation.

Relay Automotive Part Context

This model belongs to the AZ9731 series of Mini-ISO automotive relays from American Zettler. The series provides standardized solutions for high-current switching in modern vehicles. Variants within the family differ primarily in coil voltage ratings and contact arrangements, allowing designers to select specific configurations while maintaining consistent mechanical footprint and mounting characteristics across the product line.

Relay Automotive Replacement Considerations

Direct substitutes include other 40A Mini-ISO relays such as the PC792B from Picker Components. Cross-referencing pinout definitions and coil resistance values is essential when replacing with generic equivalents to ensure functional parity in the specific 48V DC application context.