A51AS24VDC1.9

Relay Automotive Overview

The A51AS24VDC1.9 is a non-latching automotive relay manufactured by CIT Relay and Switch, designed for demanding vehicle applications. It features an SPST-NO (Form A) contact configuration with a rated current of 40A. The coil operates at 24VDC with a current draw of 66.7mA. Key electrical parameters include a maximum switching voltage of 380VAC or 75VDC, an operate time of 5ms, and a release time of 3ms. The unit is fully sealed and supports a wide operating temperature range from -40°C to 85°C.

Relay Automotive Feature Summary

• Fully sealed construction for environmental protection
• High current capacity suitable for heavy loads
• Fast actuation response times

Relay Automotive Applications

• Automotive power management systems
• Vehicle control circuits
• General electronic equipment requiring high reliability

Relay Automotive Procurement Notes

Verify the specific ordering suffix against official CIT Relay and Switch documentation to ensure correct coil voltage and contact configuration. Confirm that the 24VDC coil rating matches the system design requirements. Check datasheets for precise mechanical dimensions and terminal compatibility before integration into PCB or harness layouts.

Relay Automotive Selection Notes

Select this model when a single normally open contact is required for switching up to 40A in automotive environments. Ensure the application voltage does not exceed the 75VDC or 380VAC limits. Consider the 24VDC coil requirement and verify that the 66.7mA coil current is supported by the control circuitry. Evaluate thermal conditions within the specified -40°C to 85°C range.

Relay Automotive Part Context

This component belongs to the A5 series of automotive relays from CIT Relay and Switch. These relays are engineered for dependable performance in challenging vehicle applications, offering versatility in contact configurations and coil options. The series provides robust solutions for power management and control systems where durability and consistent operation are critical.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.