A31UCQ24VDC1R

Relay Automotive Overview

The A31UCQ24VDC1R is a CIT Relay & Switch electromechanical relay featuring an SPST N.O. contact arrangement (1U configuration). It operates with a 24 VDC coil and supports a standard switching capacity of 40A at 14VDC, or 70A under heavy-duty conditions. The unit utilizes AgSnO2 In2O3 contact material with initial resistance below 30 milliohms. Maximum switching power is rated at 1120W, with voltage and current limits of 75VDC and corresponding amperage ratings. It is RoHS compliant and suitable for automotive applications.

Relay Automotive Feature Summary

• SPST N.O. contact arrangement designed for single-pole switching operations
• High switching capacity supporting up to 80A in heavy-duty configurations
• Compatible with PCB pin and quick connect mounting methods
• RoHS compliant construction for environmental safety standards

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• General purpose high-current switching

Relay Automotive Procurement Notes

Verify the specific contact arrangement code '1U' matches the required SPST N.O. configuration for your circuit design. Confirm that the 24VDC coil voltage aligns with your system's power supply capabilities. Ensure the mechanical footprint and mounting style (PCB pin or quick connect) are compatible with your assembly process. Check for any specific automotive certification requirements beyond the general QS-9000/ISO-9002 manufacturing standards mentioned in related family documentation.

Relay Automotive Selection Notes

Select this model when a normally open single-pole switch is required for high-current loads. The 24VDC coil specification dictates the control circuit voltage. Consider the heavy-duty rating if the application involves sustained high-amperage currents exceeding standard automotive relay limits. Verify that the 75VDC maximum switching voltage is sufficient for the load side potential. The AgSnO2 contact material offers durability for frequent switching cycles.

Relay Automotive Part Context

This component belongs to the CIT A3 series of high-capacity relays, characterized by large switching capacities and versatile mounting options. The series is widely used in automotive environments due to its robust construction and compliance with industry quality standards. The '1U' suffix denotes the specific SPST N.O. contact layout, distinguishing it from other arrangements like SPDT or NC variants within the same physical housing.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When replacing, ensure the new component matches the 24VDC coil resistance, SPST N.O. contact arrangement, and physical dimensions. Verify that the replacement relay supports the required 40A standard or 70A heavy-duty current ratings for the specific application load.