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                    • SIEMENS 3RH1140-1BB40 Auxiliary Contactor

                      Product Overview

                      SIEMENS 3RH1140-1BB40 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 is equipped with 4 normally open contacts (4NO), a 24 V DC coil, S00 compact size, and screw terminal connection.

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                      Specifications

                      • Brand: SIEMENS
                      • Series: SIRIUS 3RH11
                      • Model: 3RH1140-1BB40
                      • Product Type: Auxiliary Contactor / Contactor Relay
                      • Contact Configuration: 4NO (4 Normally Open)
                      • Coil Voltage: 24 V DC
                      • Frame Size: S00
                      • Identification Number: 40E
                      • Connection Type: Screw Terminals
                      • Rated Insulation Voltage: 690 V
                      • Rated Impulse Withstand Voltage: 6 kV
                      • Conventional Thermal Current: 10 A
                      • Operating Current: 6 A (AC-15 at 230 V)
                      • 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
                      • Four NO auxiliary contacts provide flexible circuit design
                      • Compact S00 housing saves installation space
                      • Suitable for PLC signal switching and feedback circuits
                      • High mechanical durability and long service life
                      • Compatible with Siemens SIRIUS contactor systems
                      • Easy DIN rail installation
                      • Suitable for replacement and maintenance of existing systems

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                      Applications

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

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                      Precautions

                      • Confirm coil voltage is 24 V DC before energizing
                      • Verify contact configuration (4NO) before wiring
                      • Do not exceed auxiliary contact current ratings
                      • Ensure correct terminal tightening
                      • Disconnect power before installation or maintenance
                      • Check compatibility when replacing existing contactor relays

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