A51AO12VDC1.9U

Relay Automotive Overview

The A51AO12VDC1.9U is an automotive SPST-NO relay from CIT Relay and Switch, rated for 40A at 14VDC with a 12VDC coil. It features a maximum switching voltage of 75VDC and contact resistance under 30 milliohms. The unit utilizes AgSnO2 contacts and offers PCB pin or quick connect mounting options. Designed for high capacity switching in compact form factors, it supports QS-9000 and ISO-9002 certified manufacturing standards.

Relay Automotive Feature Summary

• Large switching capacity up to 40A
• Small size and light weight design
• PCB pin and quick connect mounting available

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control

Relay Automotive Procurement Notes

Verify the specific suffix '1.9U' against official CIT documentation to confirm coil power rating and terminal configuration. Ensure compatibility with QS-9000 and ISO-9002 certification requirements if mandated by the assembly specification. Cross-reference datasheet revisions to validate current availability and parameter stability before finalizing procurement orders.

Relay Automotive Selection Notes

Select this component for applications requiring robust 40A switching capability within constrained spatial environments. The dual mounting flexibility accommodates both direct PCB integration and harness-based quick connect implementations. Verify that the 12VDC coil voltage aligns with the system's control circuitry and that the SPST-NO contact form meets the logical switching requirements.

Relay Automotive Part Context

This part belongs to the CIT automotive relay portfolio, designed for demanding vehicular environments. It complements other series like A2 and A6 by offering specific mounting and power characteristics. The product line emphasizes reliability through certified manufacturing processes and standardized contact materials suitable for high-current automotive loads.

Relay Automotive Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official CIT catalogs for cross-referencing compatible alternatives based on identical coil voltage, contact current ratings, and physical footprint dimensions.