A51CS12VDC1.9U

Relay Automotive Overview

The A51CS12VDC1.9U is a non-latching automotive relay manufactured by CIT Relay and Switch, designed for 12V DC coil applications. It features an SPDT (Form C) contact configuration with a maximum switching current rating of 40A at 14VDC. The unit utilizes PC pin termination for through-hole mounting on printed circuit boards. Key electrical specifications include a coil resistance of 90 Ohms and a coil current draw of 158.3 mA. The device operates within a temperature range of -40°C to 85°C and employs silver tin oxide contact material.

Relay Automotive Feature Summary

• SPDT contact configuration providing single pole double throw switching capability
• Through-hole PC pin termination for secure PCB integration
• Automotive-grade construction suitable for high-current loads up to 40A

Relay Automotive Applications

• Automotive electrical systems
• Industrial control circuits
• General purpose switching applications

Relay Automotive Procurement Notes

Verify the specific suffix '1.9U' against official CIT documentation to confirm the exact coil power rating and terminal style. Ensure the required contact form matches the SPDT (Form C) specification. Confirm that the through-hole PC pin mounting type aligns with the target PCB layout design before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component when a 12V DC controlled SPDT relay is required for automotive or industrial environments. The 40A contact rating supports high-power loads, while the 158.3 mA coil current defines the driving circuit requirements. Ensure the operating temperature range of -40°C to 85°C meets the environmental conditions of the intended application site.

Relay Automotive Part Context

This model belongs to the CIT automotive relay series, characterized by robust switching capabilities and compact PCB mounting solutions. The A51CS variant specifically denotes the SPDT configuration with PC pin terminals, distinguishing it from quick-connect or base-mount alternatives within the manufacturer's broader product portfolio.

Relay Automotive Replacement Considerations

Cross-reference part numbers such as A51CS12VDC1.6U for potential substitutes. Verify that any replacement maintains identical SPDT contact form, 12VDC coil voltage, and 40A current rating to ensure functional compatibility in existing designs.