A21CSP12VDC1.6R

Relay Automotive Overview

The A21CSP12VDC1.6R is a compact automotive relay manufactured by CIT Relay and Switch, designed for high-current switching applications in vehicle systems. It features a Single Pole Double Throw (SPDT) contact arrangement with a rated coil voltage of 12VDC and a power consumption of 1.6W. The unit supports a maximum switching current of 40A at 14VDC and operates within a maximum switching voltage of 75VDC. Constructed with AgSnO2 contacts, it offers low initial contact resistance of less than 30 milliohms and a large switching capacity up to 40A. The device utilizes through-hole mounting via PCB pins or quick connect terminals.

Relay Automotive Feature Summary

• Large switching capacity up to 40A
• Small size and light weight design
• PCB pin and quick connect mounting available

Relay Automotive Applications

• Automotive electrical systems
• Lamp accessories control
• High-current circuit switching

Relay Automotive Procurement Notes

Verify the specific ordering suffix 'R' against the manufacturer's official documentation to confirm terminal configuration and package variations. Ensure the 12VDC coil rating matches the system supply voltage. Check RoHS compliance status and manufacturing certifications such as QS-9000 or ISO-9002 if required for your supply chain standards. Confirm that the SPDT contact arrangement aligns with the intended circuit logic before procurement.

Relay Automotive Selection Notes

Select this component when a reliable SPDT switch is needed for automotive loads requiring up to 40A. The 12VDC coil specification suits standard vehicle electrical architectures. Consider the physical dimensions and mounting options, including PCB pins or quick connects, for integration into existing harnesses or boards. The AgSnO2 contact material provides durability for frequent switching operations in demanding environments.

Relay Automotive Part Context

This part belongs to the A21CSP series of automotive relays from CIT Relay and Switch. The series is characterized by robust construction suitable for harsh automotive environments. The model designation indicates a 12VDC coil voltage and a 1.6W power rating. The 'R' suffix typically denotes a specific terminal or packaging variation within the product line, distinct from other variants like the D or standard versions.

Relay Automotive Replacement Considerations

Direct substitutes may include other CIT Automotive Relays with identical SPDT configuration, 12VDC coil voltage, and 40A switching capacity. Verify mechanical footprint compatibility and terminal type equivalence. Cross-reference datasheets for contact material and resistance specifications to ensure performance parity.