A51CE24VDC1.9U

Relay Automotive Overview

The A51CE24VDC1.9U is an automotive SPDT relay manufactured by CIT Relay and Switch, designed for high-current applications. It features a 24 VDC coil with a maximum voltage of 31.2 VDC and a resistance of 360 ohms. The single changeover contact arrangement supports up to 40A at 14 VDC for the normally open circuit and 30A for the normally closed circuit. With a maximum switching power of 630W and voltage of 75 VDC, it utilizes AgSnO2 contacts offering initial resistance below 30 milliohms. The unit measures 26.0 x 26.0 x 24.5 mm.

Relay Automotive Feature Summary

• High switching capacity suitable for demanding automotive loads
• Compact physical design with lightweight construction
• Dual mounting options including PCB pins and quick connects

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• High-current signal switching

Relay Automotive Procurement Notes

Verify the specific suffix 'U' against the manufacturer datasheet to confirm package or terminal configuration details. Ensure the 24 VDC coil rating matches the system voltage. Check RoHS compliance status and ISO-9002 certification requirements for your manufacturing process before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component when a single pole double throw configuration is required for circuits operating near 14 VDC. The 40A NO rating accommodates heavy loads, while the 30A NC rating suits moderate continuous currents. Consider the 360 ohm coil resistance for power budget calculations in the control circuitry.

Relay Automotive Part Context

This model belongs to the CIT A51 series of electromechanical relays, which are certified under QS-9000 and ISO-9002 standards. The series is characterized by large switching capacities and small footprints, making it a standard choice for automotive manufacturers requiring reliable high-current switching solutions.

Relay Automotive Replacement Considerations

Compatible substitutes include the A51CE24VDC1.9 without the U suffix if terminal variations are acceptable. Other SPDT relays from CIT Relay and Switch with matching 24 VDC coils and 40A ratings may serve as functional equivalents.