A11ASP12VDC1.2R

Relay Automotive Overview

The A11ASP12VDC1.2R is an automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications. It features a single-pole single-throw normally open (SPST-NO) contact configuration with a 30 A current rating and a maximum switching voltage of 75 VDC. The unit utilizes a 12 VDC coil with a non-latching mechanism and includes an integrated resistor to suppress back EMF. Key electrical parameters include a coil current of 100 mA, coil power of 1.2 W, and a coil resistance of 120 Ohms. The device operates within a temperature range of -40°C to 125°C and employs quick-connect terminals for secure installation.

Relay Automotive Feature Summary

• Integrated suppression resistor eliminates the need for external flyback diodes or RC networks.
• Sealed construction provides protection against environmental contaminants and moisture.
• Non-latching coil design ensures immediate de-energization upon signal loss.
• Quick-connect terminal style facilitates rapid assembly and maintenance.

Relay Automotive Applications

• Automotive lighting circuits
• Heater and blower motor control
• Fuel pump activation systems

Relay Automotive Procurement Notes

Verify that the specific suffix 'R' denotes the integrated resistor variant, as this affects circuit topology compared to standard versions. Confirm that the 120 Ohm coil resistance matches the target driver output impedance to ensure reliable actuation without excessive heat generation in the control logic. Ensure the PCB footprint accommodates the quick-connect terminal spacing and physical height constraints of the sealed housing.

Relay Automotive Selection Notes

Select this component when a built-in suppression mechanism is required to protect sensitive control electronics from voltage spikes. The 30 A rating suits moderate-load automotive applications where space is limited. Consider the 120 Ohm coil resistance for compatibility with standard automotive control modules. Verify that the SPST-NO form factor aligns with the desired fail-safe operational state of the system.

Relay Automotive Part Context

This part belongs to the A11 series of automotive relays from CIT Relay and Switch, characterized by compact sealing and robust contact materials. The series is engineered for harsh environments typical of vehicle under-hood and interior applications. The inclusion of the resistor distinguishes it from basic relay models, offering a simplified solution for noise-sensitive designs.

Relay Automotive Replacement Considerations

Public confirmed substitute: A11CSQ12VDC1.2R. Note that the CSQ variant typically indicates a different contact form (SPDT vs SPST); verify pinout and functional equivalence before substitution.

Relay Automotive FAQ

What is the function of the integrated resistor in this model?

The integrated resistor suppresses back electromotive force (EMF) generated when the coil de-energizes, protecting connected control circuits from voltage spikes.

Is the coil latching or non-latching?

The coil is non-latching, meaning the contacts return to their default state immediately when the coil voltage is removed.