A21ASQ12VDC1.6R

Relay Automotive Overview

The A21ASQ12VDC1.6R is an active automotive relay from the CIT Relay and Switch A2 series, designed for high-current switching applications. It features a non-latching coil operating at 12VDC with a resistance of 90 Ohms and a current draw of 133.3 mA. The contact configuration is SPST-NO (Form A), rated for 40A at 14VDC and capable of switching up to 75VDC. Key electrical parameters include a maximum switching power of 630W, initial contact resistance below 30 milliohms, and a coil power consumption of 1.6W. The unit utilizes AgSnO2 contact material and offers quick connect termination options.

Relay Automotive Feature Summary

• Large switching capacity supporting up to 40A loads
• Compact physical design ensuring small size and light weight
• Versatile mounting options including PCB pins and quick connects

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• DC motor control circuits

Relay Automotive Procurement Notes

Verify the specific suffix 'R' against official CIT documentation to confirm if it denotes a resistor variant or standard packaging, as datasheets may vary. Ensure the required contact form matches the SPST-NO specification. Confirm RoHS compliance status for your region. Check lead times as automotive components may have variable availability. Validate that the 12VDC coil voltage aligns with your system's supply rails before ordering.

Relay Automotive Selection Notes

Select this component when a single normally open circuit requires high current handling in automotive environments. The 40A rating suits heavy loads like lamps or motors. Consider the 12VDC coil requirement for compatibility with standard vehicle electrical architectures. The quick connect interface facilitates rapid assembly. Verify that the 75VDC maximum switching voltage exceeds your circuit's peak voltage requirements.

Relay Automotive Part Context

This relay belongs to the CIT A2 series, which is certified under QS-9000 and ISO-9002 standards. The series is characterized by robust construction suitable for harsh automotive conditions. The A21ASQ model specifically denotes the SPST-NO configuration within the socketable automotive relay family. These components are engineered for reliability in temperature ranges spanning -40°C to 125°C.

Relay Automotive Replacement Considerations

Direct substitutes include the A2M1USP12VDC1.6 for similar switching capacities. The A2S1ASQ12VDC1.6 offers identical electrical ratings but may differ in mechanical housing details. Cross-reference pinouts and mounting dimensions carefully. Ensure any replacement maintains the 12VDC coil voltage and 40A contact rating.

Relay Automotive FAQ

What is the maximum switching voltage for this relay?

The maximum switching voltage is 75VDC.

Does this relay use latching technology?

No, it uses a non-latching coil type.

What is the contact material used?

The contacts are made of Silver Tin Oxide (AgSnO2).