A21CSQ48VDC1.6R

Relay Automotive Overview

The A21CSQ48VDC1.6R is a sealed, socketable automotive relay manufactured by CIT Relay and Switch. It features a single-pole double-throw (SPDT) contact configuration with one Form C set. The unit operates on a 48VDC coil voltage with a non-latching mechanism. Key electrical parameters include a maximum switching capacity of 40A and a coil current of 33.3 mA. The coil power consumption is rated at 1.6W, incorporating an internal resistor. The device is designed for robust automotive applications requiring reliable high-current switching.

Relay Automotive Feature Summary

• Sealed construction provides environmental protection for automotive use
• Socketable design allows for easy installation and replacement without soldering
• Integrated coil resistor ensures stable operation and reduced electromagnetic interference

Relay Automotive Applications

• Automotive lighting circuits
• High-power accessory control systems
• Industrial equipment switching

Relay Automotive Procurement Notes

Verify the specific suffix 'R' indicates the inclusion of the internal coil resistor, which distinguishes this variant from standard versions. Confirm that the 48VDC coil rating aligns with the target system's power supply to prevent under-voltage actuation or excessive current draw. Ensure the socket compatibility matches the PCB footprint requirements for the intended assembly.

Relay Automotive Selection Notes

Select this component when a 48VDC control signal is available and a 40A switching capacity is required. The SPDT configuration offers flexibility for common ground or common power arrangements. Consider the sealed nature if the operating environment contains moisture or dust. Verify that the physical dimensions fit within the designated enclosure space alongside other components.

Relay Automotive Part Context

This relay belongs to the A2 series from CIT Relay and Switch, characterized by compact size and high current handling capabilities. The A21CSQ48VDC1.6R specifically targets the 48VDC automotive sector, offering a robust alternative to lower-rated relays. Its socketable form factor supports modular design strategies in vehicle electronics manufacturing.

Relay Automotive Replacement Considerations

Direct substitutes must match the 48VDC coil voltage, SPDT contact form, and 40A current rating. Verify mechanical compatibility, including pin spacing and socket type, to ensure interchangeability without modifying the printed circuit board layout.