A51CO12VDC1.9U

Relay Automotive Overview

The A51CO12VDC1.9U is an automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a Single Pole Double Throw (SPDT) contact arrangement, commonly designated as Form C. The device operates with a 12 VDC coil voltage and supports a maximum switching current of 40A at 75VDC. This component is engineered for through-hole mounting and utilizes quick-connect terminals for secure electrical interfacing within vehicle systems.

Relay Automotive Feature Summary

• SPDT contact configuration enabling complex circuit control
• High-capacity 40A switching rating for heavy loads
• Through-hole construction for robust mechanical stability

Relay Automotive Applications

• Automotive lighting circuits
• Vehicle accessory power distribution
• Industrial control panels

Relay Automotive Procurement Notes

Verify the specific ordering suffix '1.9U' against official CIT documentation to confirm terminal style and pinout compatibility. Ensure the 12VDC coil specification matches the target system voltage. Confirm that the SPDT contact arrangement aligns with the required circuit logic before finalizing procurement orders.

Relay Automotive Selection Notes

Select this model when a single input must switch between two distinct output paths. The 40A capacity suits high-power automotive loads. Verify that the through-hole package fits the PCB layout constraints and that the 12VDC coil voltage is compatible with the available control signal source.

Relay Automotive Part Context

This part belongs to the CIT automotive relay series, characterized by high current handling and reliability in harsh environments. The A51CO12VDC1.9U variant specifically provides double-throw functionality, distinguishing it from standard single-pole single-throw relays used for simple on/off control.

Relay Automotive Replacement Considerations

Compatible substitutes include other CIT automotive relays with matching 12VDC coils and 40A SPDT ratings, such as the A51CE12VDC1.6 or A51CO12VDC1.9, provided the physical footprint and terminal configuration are identical.

Relay Automotive FAQ

What is the contact arrangement of the A51CO12VDC1.9U?

It uses a Single Pole Double Throw (SPDT) arrangement, also known as Form C.

Is this relay suitable for high-current automotive applications?

Yes, it is rated for a maximum switching current of 40A, making it suitable for heavy loads.