A21CSQ12VDC1.9

Relay Automotive Overview

The A21CSQ12VDC1.9 is a sealed automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications in vehicle electrical systems. It features a Single Pole Double Throw (SPDT) contact arrangement with a maximum switching capacity of 40A at 14VDC. The unit operates on a 12VDC coil voltage with a power consumption of 1.6W and a coil resistance of 80 Ohms. Key electrical parameters include an operating time of 7 ms and a release time of 5 ms. The device supports quick connect mounting terminals and functions within a temperature range of -40°C to 125°C.

Relay Automotive Feature Summary

• Sealed construction ensures protection against environmental contaminants
• High current switching capability suitable for heavy loads
• Compact design optimized for space-constrained automotive installations

Relay Automotive Applications

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

Relay Automotive Procurement Notes

Verify the specific ordering suffix to confirm terminal style and coil voltage compatibility. Ensure the selected variant matches the required contact configuration and current rating for the target application. Cross-reference official datasheets to confirm sealing standards and mounting requirements before procurement.

Relay Automotive Selection Notes

Select this component based on its 40A SPDT rating and 12VDC coil specification. Consider the sealed design for harsh environments and the quick-connect terminals for ease of assembly. Verify that the operating temperature range meets the installation site conditions.

Relay Automotive Part Context

This part belongs to the CIT automotive relay family, characterized by robust switching performance and compact form factors. It is engineered specifically for automotive use, offering reliability under vibration and thermal stress common in vehicle operations.

Relay Automotive Replacement Considerations

Direct substitutes may include other CIT models with identical pinouts and ratings, such as variants with different coil resistances or terminal configurations. Verify mechanical dimensions and electrical characteristics before substitution.

Relay Automotive FAQ

What is the contact arrangement of the A21CSQ12VDC1.9?

It features a Single Pole Double Throw (SPDT) contact arrangement.

Is this relay sealed?

Yes, the A21CSQ12VDC1.9 is a sealed automotive relay.