A2HF1CSQ12VDC1.6R

Relay Automotive Overview

The A2HF1CSQ12VDC1.6R is a sealed SPDT automotive relay from the CIT A2 series, designed for chassis mounting with quick connect termination. It features a 12VDC coil with 1.6W power consumption and a 680-ohm resistor. The switch contacts are rated for 50A at 14VDC, supporting a maximum switching voltage of 75VDC. Constructed with AgSnO contact material, it ensures low initial contact resistance below 30 milliohms. The unit operates within a temperature range of -40°C to 125°C and includes a metal bracket and shroud for protection.

Relay Automotive Feature Summary

• Sealed construction with metal bracket and shroud for environmental protection
• High current switching capacity up to 50A for heavy load applications
• Integrated coil resistor for circuit stability and noise reduction
• Quick connect termination compatible with standard automotive harnesses

Relay Automotive Applications

• Automotive lighting circuits
• Motor control systems
• Heater and blower motor switches
• General high-current automotive accessory control

Relay Automotive Procurement Notes

Verify the specific suffix 'R' indicates the inclusion of the internal 680-ohm resistor, as non-R variants may lack this component. Confirm that the 50A rating applies to the specific load conditions defined in the official datasheet. Ensure the chassis mount style matches the available mounting hardware in the target assembly. Check RoHS compliance status if required by local regulations.

Relay Automotive Selection Notes

Select this model when a sealed SPDT relay with high current handling is required for automotive environments. The integrated resistor simplifies driver circuit design by reducing back EMF. Compare against the A2S1ASQ12VDC1.6 for SPST needs or the A2M1USP12VDC1.6 for switch-only applications. Ensure the 12VDC coil voltage aligns with the vehicle's electrical system specifications.

Relay Automotive Part Context

This component belongs to the CIT A2 series of automotive relays, which are characterized by compact dimensions and robust switching capabilities. The series offers various contact arrangements including SPST and SPDT configurations. The A2HF1CSQ12VDC1.6R specifically utilizes the HF form factor, distinguishing it from other chassis-mounted variants in the lineup through its specific contact rating and sealing features.

Relay Automotive Replacement Considerations

Direct substitutes include the A2HF1CSQ12VDC1.6 (without resistor) if the external resistor is acceptable. For identical functionality with resistor, verify availability of the exact part number. Alternative CIT models like A2K1CSQ12VDC1.6R offer different current ratings but may require pin compatibility checks.