A2S1CSQ24VDC1.9D

Relay Automotive Overview

The A2S1CSQ24VDC1.9D is an automotive relay from the CIT Relay and Switch A2 series, designed for high-capacity switching applications. It features a single pole double throw (SPDT) contact arrangement with a maximum switching current of 40A and a maximum switching voltage of 75V DC. The unit operates on a 24V DC coil with a rated resistance of 360 ohms and a coil current of 79.2 mA. Constructed with AgSnO2 contacts, it offers low initial contact resistance under 30 milliohms and supports up to 630W switching power. The component measures 26.0 x 26.0 x 24.5 mm, providing a compact form factor suitable for space-constrained installations.

Relay Automotive Feature Summary

• Large switching capacity supporting up to 40A current loads
• Compact physical dimensions with lightweight construction
• Versatile mounting options including PCB pins and quick connect terminals

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• General industrial switching circuits

Relay Automotive Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct terminal configuration and coil characteristics. Confirm that the requested variant matches the required SPDT contact form and 24V DC coil voltage specifications. Cross-reference the part number with the latest CIT Relay and Switch datasheets to validate active status and compliance with relevant quality certifications such as QS-9000 or ISO-9002 before finalizing procurement orders.

Relay Automotive Selection Notes

Select this model when a robust SPDT relay is required for automotive or heavy-duty applications involving high current loads up to 40A. Ensure the system voltage aligns with the 24V DC coil rating and that the 75V DC maximum switching voltage meets circuit requirements. Consider the available mounting styles, specifically PCB pins or quick connect terminals, based on the assembly constraints and mechanical stability needs of the target application environment.

Relay Automotive Part Context

This component belongs to the A2 series of automotive relays manufactured by CIT Relay and Switch. The series is characterized by its small size, light weight, and large switching capacity, making it suitable for demanding environments. The A2 series includes various configurations with different contact arrangements and coil voltages, all adhering to strict manufacturing standards certified by QS-9000 and ISO-9002 protocols for consistent performance.

Relay Automotive Replacement Considerations

Direct substitutes within the same series include variants with different coil resistances or contact ratings, such as the A2S1CSQ24VDC1.6D. Verify compatibility regarding coil current, contact material, and mechanical dimensions before substitution. Ensure that any replacement part maintains the SPDT configuration and meets the original 40A switching capacity requirement.