A3KM1ASQ12VDC1.6R

Relay Automotive Overview

The A3KM1ASQ12VDC1.6R is a sealed SPST-NO automotive relay from the CIT A3K series, designed for chassis mounting with quick-connect terminals. It features a 12VDC coil with 1.6W power consumption and 90 Ohms resistance. The switch contacts support up to 40A at 14VDC and handle maximum switching voltages of 75VDC and 630W. Constructed with AgSnO2 contacts offering less than 30 milliohms initial contact resistance, it operates within a -40°C to 125°C range. The unit measures 26.0 x 26.0 x 24.5 mm (with height up to 39.5 mm) and includes ISO certification.

Relay Automotive Feature Summary

• Sealed construction with metal bracket and shroud for durability
• High switching capacity suitable for automotive loads
• Quick-connect termination for simplified installation

Relay Automotive Applications

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

Relay Automotive Procurement Notes

Verify the specific suffix 'R' indicates the inclusion of an internal resistor or surge suppression component as documented in official CIT Relay and Switch catalogs. Confirm that the chassis mount configuration matches the required PCB or panel layout. Ensure compliance with RoHS standards if required by the end application. Cross-reference the coil voltage tolerance against the vehicle's electrical environment to prevent malfunction.

Relay Automotive Selection Notes

Select this model when a high-current single-pole normally open circuit is required in space-constrained automotive environments. The sealed design protects against moisture and contaminants compared to open-frame alternatives. Consider the 1.6W coil power draw for battery load calculations. The quick-connect pins facilitate rapid assembly without soldering, making it suitable for mass production lines.

Relay Automotive Part Context

This component belongs to the CIT A3K series of maxi relays, which are standardized for automotive use. The series is known for robust switching capabilities and compact dimensions relative to current ratings. The A3KM1 variant specifically denotes the SPST-NO contact arrangement with chassis mounting provisions, distinguishing it from PCB-only or multi-form variants within the same family.

Relay Automotive Replacement Considerations

Compatible substitutes include other ISO-sized automotive relays with matching 12VDC coil characteristics and SPST-NO contact forms. Verify that replacement units support the same 40A switching current and 75VDC maximum voltage. Ensure physical dimensions and terminal spacing align with existing mounting brackets and wiring harnesses.