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                      • SIEMENS 3RH1122-1BB40 Auxiliary Contactor

                        Product Overview

                        SIEMENS 3RH1122-1BB40 is a SIRIUS 3RH11 Auxiliary Contactor (Contactor Relay) designed for switching auxiliary control circuits in industrial automation systems. It is mainly used for signal switching, electrical interlocking, PLC interface circuits, and contact expansion applications.

                        This model features 2 normally open contacts + 2 normally closed contacts (2NO + 2NC), with a 24 V DC coil, S00 size, and screw terminal connection.

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                        Specifications

                        • Brand: SIEMENS
                        • Series: SIRIUS 3RH11
                        • Model: 3RH1122-1BB40
                        • Product Type: Auxiliary Contactor / Contactor Relay
                        • Contact Configuration: 2NO + 2NC
                        • Coil Voltage: 24 V DC
                        • Frame Size: S00
                        • Connection Type: Screw Terminals
                        • Rated Insulation Voltage: 690 V
                        • Rated Impulse Withstand Voltage: 6 kV
                        • Conventional Thermal Current: 10 A
                        • Rated Operating Current: 6 A
                        • Protection Rating: IP20 (front)
                        • Mounting: DIN Rail / Panel Mounting
                        • Mechanical Life: Approx. 30 million switching cycles
                        • Operating Temperature: -25…+60 °C

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                        Advantages & Features

                        • Reliable switching performance for industrial control circuits
                        • Flexible 2NO + 2NC contact arrangement
                        • Compact S00 design saves cabinet installation space
                        • Suitable for PLC signal switching and feedback circuits
                        • Supports electrical interlocking applications
                        • High mechanical durability and long service life
                        • Compatible with Siemens SIRIUS contactor systems
                        • Easy DIN rail installation

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                        Applications

                        • Industrial automation control panels
                        • PLC interface circuits
                        • Motor starter control systems
                        • Contactor interlocking circuits
                        • Machine control equipment
                        • Factory automation systems
                        • Electrical control cabinets
                        • Signal switching applications

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                        Precautions

                        • Confirm coil voltage is 24 V DC before energizing
                        • Verify contact arrangement (2NO + 2NC) before wiring
                        • Do not exceed auxiliary contact current ratings
                        • Ensure correct terminal tightening
                        • Disconnect power before installation or maintenance
                        • Check replacement compatibility with existing Siemens equipment 

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