A21ASQ12VDC1.6D

Relay Automotive Overview

The A21ASQ12VDC1.6D is a socketable automotive relay manufactured by CIT Relay and Switch, featuring an SPST-NO contact arrangement with a 40A rating at 14VDC. It operates on a 12VDC coil voltage with a resistance of 90 Ohms and consumes 1.6W. The unit utilizes quick connect terminals measuring 0.250 inches (6.3mm) for mounting. Designed for robust performance, it supports a maximum switching voltage of 75VDC and includes AgSnO2 contact material. The device functions within a temperature range of -40°C to 125°C and meets RoHS compliance standards.

Relay Automotive Feature Summary

• Large switching capacity up to 40A
• Small size and light weight construction
• Socketable design with quick connect mounting options

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• General automotive load switching

Relay Automotive Procurement Notes

Verify the specific suffix 'D' indicates the socketable variant with quick connect terminals as documented. Confirm the 12VDC coil specification matches the target circuit requirements. Ensure the SPST-NO configuration aligns with the intended logic. Check for RoHS compliance status if environmental regulations apply. Validate the operating temperature range against the installation environment constraints.

Relay Automotive Selection Notes

Select this component when a high-current automotive relay with a 40A capacity is required. The 12VDC coil voltage suits standard vehicle electrical architectures. The socketable design facilitates easy replacement and maintenance in confined spaces. Consider the SPST-NO contact form for simple on/off control applications. Verify that the quick connect terminal style is compatible with existing harness connectors.

Relay Automotive Part Context

This part belongs to the CIT A2 series of automotive relays, designed for heavy-duty switching tasks. The series is characterized by its compact form factor and high current handling capabilities. It is certified under QS-9000 and ISO-9002 manufacturing standards, ensuring consistent quality for automotive supply chains. The A2 series provides reliable performance in harsh environments typical of modern vehicles.

Relay Automotive Replacement Considerations

Direct substitutes include other CIT A2 series variants such as A2S1ASQ12VDC1.6 or A2M1USP12VDC1.6, provided the contact arrangement and mounting style match. Verify coil voltage and current ratings before substitution. Ensure the replacement part maintains the same socketable interface and terminal type.