A2S1ASQ24VDC1.9R

Relay Automotive Overview

The A2S1ASQ24VDC1.9R is a sealed automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features an SPST-NO (Form A) contact arrangement with a maximum switching current of 40A at 75VDC. The coil operates on a 24VDC supply, drawing 79.2mA with a resistance of 300 Ohms and consuming 1.9W of power. This component includes an integrated suppression diode and utilizes silver tin oxide contacts to ensure reliable performance in demanding environments.

Relay Automotive Feature Summary

• High switching capacity up to 40A
• Integrated suppression diode
• Sealed construction for environmental protection

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories
• General-purpose industrial control

Relay Automotive Procurement Notes

Verify the specific suffix 'R' against official CIT documentation to confirm the presence of the internal diode and exact terminal configuration. Ensure the selected variant matches the required mounting style and voltage rating for the target circuit design before finalizing procurement.

Relay Automotive Selection Notes

Select this model when a 24VDC coil voltage is required for circuits handling loads up to 40A. The sealed design and diode integration make it suitable for automotive environments where moisture resistance and inductive load protection are necessary. Confirm that the quick-connect terminals fit the available harness or PCB layout constraints.

Relay Automotive Part Context

This relay belongs to the CIT A2 series, which provides compact, high-capacity switching solutions for automotive and general-purpose applications. The series is characterized by small size, light weight, and robust manufacturing standards including QS-9000 and ISO-9002 certification, ensuring reliability across various industrial sectors.

Relay Automotive Replacement Considerations

Direct substitutes include the A2S1ASQ24VDC1.6D and A2S1ASQ24VDC1.9, provided the coil power and contact ratings align with the application requirements. Verify that any replacement maintains the same SPST-NO configuration and sealing specifications.

Relay Automotive FAQ

Does the A2S1ASQ24VDC1.9R include a suppression diode?

Yes, the datasheet indicates that this specific variant includes an integrated suppression diode.

What is the maximum switching voltage for this relay?

The maximum switching voltage is rated at 75VDC.