Schneider Electric Telemecanique CA3KN22BD Control Relay

The Schneider Electric Telemecanique CA3KN22BD is a 4-pole control relay (2 NO + 2 NC) with a 24 VDC coil designed for reliable auxiliary switching and PLC interfacing in industrial control panels. It supports up to 690 VAC for its rated operating voltage, with a thermal current (Ith) of 10 A and a rated making capacity of 110 A (IEC 60947). The coil is a 24 VDC coil with a built-in bidirectional peak-limiting diode suppressor, helping protect upstream circuits from voltage spikes. This relay is mounted on a DIN rail or panel, uses screw-clamp terminals, and carries utilization categories AC-15 / DC-13, making it suitable for AC control and DC control applications. As part of the TeSys K (CA3K) family, it is commonly used for PLC interface circuits, motor control systems, conveyors, packaging machinery, HVAC equipment, and process control, as well as machine safety interlocks and signaling circuits where dependable auxiliary switching is essential. Common replacements include Allen-Bradley 700-CF310D and Siemens 3RH2122-1BB40. Typical users include maintenance teams, OEM engineers, and system integrators performing control panel builds, system upgrades, retrofit projects, preventive maintenance, or replacement of worn relays. Certifications include IEC 60947-5-1, UL 60947-5-1, and CSA C22.2 No. 60947-5-1.