A51AS12VDC1.9U

Relay Automotive Overview

The A51AS12VDC1.9U is an automotive relay manufactured by CIT Relay and Switch, featuring a 12VDC coil voltage and SPST-NO (Single Pole Single Throw Normally Open) contact configuration. It supports a maximum switching voltage of 380VAC or 75VDC with a 40A contact rating. The unit utilizes PC pin termination for through-hole mounting and operates within a temperature range of -40°C to 85°C. Designed for robust performance in vehicle electrical systems, it meets RoHS compliance standards.

Relay Automotive Feature Summary

• SPST-NO contact form provides single circuit control capability
• High current capacity rated at 40 Amps for demanding loads
• PC pin termination ensures secure board integration
• RoHS compliant construction for environmental safety

Relay Automotive Applications

• Automotive lighting circuits
• Vehicle accessory power distribution
• General automotive control modules

Relay Automotive Procurement Notes

Verify the specific suffix 'U' against manufacturer documentation to confirm lead-free status and packaging details. Ensure the PCB footprint matches the PC pin spacing requirements. Confirm that the 12VDC coil voltage aligns with the target system's supply rails before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component when a single normally open contact is required for high-current automotive applications. The 40A rating accommodates significant load currents, while the 12VDC coil ensures compatibility with standard vehicle electrical architectures. Consider the operating temperature range and mounting style relative to the enclosure constraints.

Relay Automotive Part Context

This model belongs to the CIT Relay and Switch automotive series, designed specifically for vehicular environments. It offers a compact solution for switching high-power loads using low-power control signals. The SPST-NO configuration is standard for activating auxiliary equipment without maintaining a continuous connection.

Relay Automotive Replacement Considerations

Cross-reference part numbers such as A51AS12VDC1.6 for similar specifications within the same product line. Verify that substitute components maintain identical contact ratings, coil voltages, and physical dimensions to ensure seamless integration into existing designs.