AZ9731-1C-24DC2

Relay Automotive Overview

The AZ9731-1C-24DC2 is a 40 AMP Mini-ISO automotive relay manufactured by American Zettler. It features a SPDT (1 Form C) contact arrangement with a 24VDC coil voltage. The device supports a maximum switched current of 40A for normally open contacts and 30A for normally closed contacts, handling up to 560W resistive load at 75VDC. Key electrical parameters include a typical operate time of 7ms, dielectric strength of 500Vrms between coil and contacts, and a coil resistance of approximately 85 ohms. It is designed for high in-rush applications with vibration and shock resistance.

Relay Automotive Feature Summary

• Compact Mini-ISO form factor suitable for space-constrained automotive environments
• High switching capability with 40 Amp contact rating for heavy loads
• Robust construction resistant to vibration and shock for reliable operation
• Available in epoxy sealed versions for enhanced environmental protection

Relay Automotive Applications

• Automotive power distribution systems
• High-current circuit control in vehicles
• Industrial equipment requiring compact high-amperage switching
• Applications demanding vibration-resistant electromechanical relays

Relay Automotive Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to ensure exact coil voltage, contact configuration, and sealing type match the design requirements. Confirm that the 24VDC coil specification aligns with the system's power supply. Check for any special precautions required when switching voltages exceeding 30VDC as noted in general family guidelines. Ensure compatibility with standard Mini-ISO sockets if panel mounting is intended.

Relay Automotive Selection Notes

Select this component when a 40 Amp switching capacity is required within a Mini-ISO footprint. The SPDT configuration provides both normally open and normally closed paths, offering flexibility in circuit design. Consider the 24VDC coil requirement against available vehicle or system voltages. Evaluate the need for epoxy sealing based on environmental exposure levels. Verify that the 75VDC maximum switched voltage meets the application's electrical limits.

Relay Automotive Part Context

This part belongs to the AZ973 series of Mini-ISO automotive relays from American Zettler. The series is characterized by its compact size, high current handling up to 40A, and suitability for harsh automotive environments. Variants within the series differ primarily by coil voltage, contact arrangement (Form A or C), and sealing options. The AZ9731-1C-24DC2 specifically denotes the 24VDC coil and SPDT contact version.

Relay Automotive Replacement Considerations

Direct substitutes may include other AZ973 series variants with identical mechanical dimensions but different coil voltages or contact forms, provided electrical ratings are compatible. Cross-brand replacements must match the Mini-ISO footprint, 40A current rating, and 24VDC coil specifications. Verify pinout compatibility and terminal types before substitution.