SIEMENS
Contactor relay 4 NO contacts, 24V DC, screw terminals, S00 frame. Compact, reliable, and perfect for industrial automation.
The Siemens SIRIUS 3RH2 Contactor Relay, model 3RH2140-1BB40, is a high-performance electrical component designed for switching auxiliary and control circuits in industrial automation. Its robust construction and standardized frame size (S00) ensure reliable operation and simple integration into existing control panels. This unit is specifically configured with four (4) normally open (NO) auxiliary contacts, making it ideal for interlocking, signaling, and sequence control tasks.
Reliable Switching: Features 4 NO contacts for dependable switching of control circuit loads.
DC Power Optimized: Uses a 24 V DC operating coil, which is standard in modern industrial control systems, providing stable performance and reducing panel complexity.
Compact Design (Size S00): Its small physical footprint helps save valuable space inside control cabinets, allowing for denser component placement.
Secure Connection: Screw terminals offer a time-tested, secure, and vibration-proof connection for wiring, ensuring long-term reliability.
High Durability: Part of the SIRIUS family, it is engineered for a long service life and high mechanical/electrical endurance in demanding industrial environments.
The 3RH2140-1BB40 primarily functions as an electrically operated switch in control systems. It is used to multiply control signals coming from PLCs, pushbuttons, or sensors to safely drive intermediate circuits and other relays.
Motor Starter Combinations: Used for interlocking and signaling status within complex motor control centers.
Sequence Control: Implementing steps and conditions in automated processes.
HMI/Signaling: Providing feedback to human-machine interfaces (HMIs) or actuating indicator lamps and alarms.
Control Circuit Isolation: Safely separating low-power control circuits from higher-power relay logic circuits.
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| SKU / Model | 3RH2140-1BB40 |
|---|---|
| Brand | SIEMENS |
| product brand name | SIRIUS |
| product designation | Auxiliary contactor |
| product type designation | 3RH2 |
| size of contactor | S00 |
| product extension auxiliary switch | Yes |
| insulation voltage with degree of pollution 3 at AC rated value | 690 V |
| degree of pollution | 3 |
| surge voltage resistance rated value | 6 kV |
| shock resistance at rectangular impulse | - |
| shock resistance with sine pulse | - |
| mechanical service life (switching cycles) | - |
| ● of contactor typical | 30 000 000 |
| ● of the contactor with added electronically optimized auxiliary switch block typical | 5 000 000 |
| ● of the contactor with added auxiliary switch block typical | 10 000 000 |
| reference code acc. to IEC 81346-2 | K |
| installation altitude at height above sea level maximum | 2 000 m |
| ambient temperature | - |
| ● during operation | -25 ... +60 °C |
| ● during storage | -55 ... +80 °C |
| relative humidity minimum | 10 % |
| relative humidity at 55 °C acc. to IEC 60068-2-30 maximum | 95 % |
| no-load switching frequency | - |
| ● at AC | 10 000 1/h |
| type of voltage of the control supply voltage | DC |
| control supply voltage at DC | - |
| ● rated value | 24 V |
| operating range factor control supply voltage rated value of magnet coil at DC | - |
| ● initial value | 0.8 |
| ● full-scale value | 1.1 |
| closing power of magnet coil at DC | 4 W |
| holding power of magnet coil at DC | 4 W |
| closing delay | - |
| opening delay | - |
| ● at DC | 7 ... 13 ms |
| arcing time | 10 ... 15 ms |
| number of NO contacts for auxiliary contacts | 4 |
| ● instantaneous contact | 4 |
| identification number and letter for switching elements | 40 E |
| operational current at AC-12 maximum | 10 A |
| operational current at AC-15 | - |
| ● at 230 V rated value | 10 A |
| ● at 400 V rated value | 3 A |
| ● at 500 V rated value | 2 A |
| ● at 690 V rated value | 1 A |
| operational current at 1 current path at DC-12 | - |
| operational current with 2 current paths in series at DC-12 | - |
| operational current with 3 current paths in series at DC-12 | - |
| operating frequency at DC-12 maximum | 1 000 1/h |
| operational current at 1 current path at DC-13 | - |
| operational current with 2 current paths in series at DC-13 | - |
| operational current with 3 current paths in series at DC-13 | - |
| ● at 24 V rated value | 10 A |
| ● at 60 V rated value | 4.7 A |
| ● at 110 V rated value | 3 A |
| ● at 220 V rated value | 1.2 A |
| ● at 440 V rated value | 0.5 A |
| ● at 600 V rated value | 0.26 A |
| operating frequency at DC-13 maximum | 1 000 1/h |
| design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V | C characteristic: 6 A; 0.4 kA |
| contact reliability of auxiliary contacts | 1 faulty switching per 100 million (17 V, 1 mA) |
| contact rating of auxiliary contacts according to UL | A600 / Q600 |
| design of the fuse link for short-circuit protection of the auxiliary switch required | fuse gL/gG: 10 A |
| mounting position | +/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface |
| fastening method | screw and snap-on mounting onto 35 mm standard mounting rail |
| required spacing | - |
| ● with side-by-side mounting | - |
| ● for grounded parts | - |
| ● for live parts | - |
| — forwards | 10 mm |
| — upwards | 10 mm |
| — downwards | 10 mm |
| — at the side | 6 mm |
| type of electrical connection for auxiliary and control circuit | screw-type terminals |
| type of connectable conductor cross-sections | - |
| ● for auxiliary contacts | - |
| — solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm² |
| — finely stranded with core end processing | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| ● at AWG cables for auxiliary contacts | 2x (20 ... 16), 2x (18 ... 14), 2x 12 |
| B10 value with high demand rate acc. to SN 31920 | 1 000 000; With 0.3 x Ie |
| proportion of dangerous failures | - |
| ● with low demand rate acc. to SN 31920 | 40 % |
| ● with high demand rate acc. to SN 31920 | 73 % |
| failure rate [FIT] with low demand rate acc. to SN 31920 | 100 FIT |
| T1 value for proof test interval or service life acc. to IEC 61508 | 20 y |
| protection class IP on the front acc. to IEC 60529 | IP20 |
| touch protection on the front acc. to IEC 60529 | finger-safe, for vertical contact from the front |
| Functional Safety/Safety of Machinery | Test Certificates Declaration of Conformity |
| last modified: | 12/1/2021 |
| Weight | 0.271 kg |
| Dimensions | 50.00 × 61.50 × 77.50 mm |
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