A2H1CSP12VDC1.6R

Relay Automotive Overview

The A2H1CSP12VDC1.6R is a sealed SPDT automotive relay manufactured by CIT Relay and Switch, designed for high-current applications. It features a 12VDC coil with a rated power of 1.6W and an integrated 680-ohm resistor to suppress voltage spikes. The contact arrangement supports a maximum switching current of 50A at 14VDC, with a maximum switching voltage of 75VDC. The unit utilizes quick connect terminals (0.250 inch) and includes a metal bracket and shroud for secure mounting. Operating temperatures range from -40°C to 125°C, ensuring reliability in harsh automotive environments.

Relay Automotive Feature Summary

• Sealed construction with metal bracket and shroud for environmental protection
• Integrated 680-ohm resistor for coil voltage suppression
• High switching capacity up to 50A for heavy-duty loads
• Quick connect termination compatible with standard automotive harnesses

Relay Automotive Applications

• Automotive lighting circuits
• Starter motor control systems
• Heater and blower motor management
• Industrial lamp accessories

Relay Automotive Procurement Notes

Verify the specific suffix 'R' indicates the inclusion of the internal 680-ohm resistor, as this alters electrical characteristics compared to non-resistor variants. Confirm that the 50A rating aligns with your peak load requirements, noting that continuous duty may require derating. Ensure the quick connect terminal width matches your connector specifications. Check RoHS compliance status if required by your assembly standards. Validate the operating temperature range against your environmental conditions.

Relay Automotive Selection Notes

Select this model when a sealed SPDT configuration is required for high-current automotive loads. The integrated resistor simplifies circuit design by eliminating external snubber components. Compare coil resistance and current draw against available power supplies to ensure adequate drive capability. Consider the physical dimensions and mounting bracket style for enclosure compatibility. Evaluate thermal dissipation needs given the 1.6W coil power and potential contact heating under full load.

Relay Automotive Part Context

This component belongs to the CIT A2 series of automotive relays, which are characterized by compact size and robust switching capabilities. The series offers various contact arrangements and coil voltages to suit different vehicle architectures. The A2H variant specifically denotes a higher current capacity within the sealed shrouded family, distinguishing it from lower-rated or open-frame models.

Relay Automotive Replacement Considerations

Direct substitutes include the A2S1CSQ12VDC1.6R, though it has a 40A rating instead of 50A. The A2M1USP12VDC1.6 is an unsealed alternative with similar electrical specs but lacks the protective shroud. Verify pinout compatibility and mechanical mounting hole patterns before swapping. Ensure the replacement part maintains the same coil voltage and resistor inclusion if spike suppression is critical.