Siemens 3RH2140-1BB40 Contactor

Siemens 3RH2140-1BB40 Contactor is a four-pole DC-coil control relay in the compact S00 frame size, featuring four normally open (NO) contacts and screw-terminal wiring. The coil operates at 24 V DC, enabling actuation from standard 24 V control circuits, while the four NO contacts provide separate switching paths from a single coil. This device is designed for panel mounting via screw terminals, offering straightforward wiring in compact control cabinets. The part number 3RH2140-1BB40 belongs to Siemens' 3RH2 family of contactors, a common choice for reliably switching multiple circuits in automation and motor-control applications where space is limited. With its 24 V DC coil and four NO contacts, it supports multi-channel control tasks in process automation and machine control environments that require a compact, dedicated switching element.