A2S1CSQ12VDC1.9D

Relay Automotive Overview

The A2S1CSQ12VDC1.9D is a sealed SPDT automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a 12VDC coil with a power rating of 1.9W and a resistance of 75.8 Ohms. The unit utilizes quick connect terminals (0.250 inch) and supports panel mounting. Key electrical specifications include a maximum switching voltage of 75VDC and a contact current capacity of 40A. The device operates within a temperature range of -40°C to 125°C and employs silver tin oxide (AgSnO2) contacts.

Relay Automotive Feature Summary

• Sealed construction provides environmental protection for automotive use
• High switching capacity up to 40A for heavy load control
• Compact design with lightweight form factor
• Versatile mounting options including PCB pins and quick connects

Relay Automotive Applications

• Automotive lighting circuits
• Lamp accessories control
• General automotive electrical systems

Relay Automotive Procurement Notes

Verify the specific coil power rating against official documentation, as variations exist within the A2 series (e.g., 1.6W vs 1.9D). Confirm terminal type compatibility with existing harnesses. Ensure the operating temperature range meets the specific application environment requirements. Check RoHS compliance status if required by project specifications.

Relay Automotive Selection Notes

Select this model when a sealed SPDT relay with 40A capacity is required for automotive environments. The 12VDC coil voltage must match the system supply. Consider the 1.9W coil power consumption for thermal management. Verify that the quick connect termination style aligns with available connector interfaces.

Relay Automotive Part Context

This component belongs to the CIT A2 Series of automotive relays, which are characterized by their robust switching capabilities and compact size. The series includes various configurations with different coil powers and contact arrangements, all sharing common sealing standards and mounting styles suitable for vehicle integration.

Relay Automotive Replacement Considerations

The A2S1CSQ12VDC1.6R is a documented substitute within the same family, featuring similar SPDT contacts and 40A capacity but with a 1.6W coil power and integrated resistor. Verify coil resistance and power differences before substitution.