SIEMENS
Siemens 3RH2122-2BB40 is a compact, high-performance SIRIUS series contactor relay designed for industrial control applications. Featuring a reliable 24 V DC coil and a configuration of 2 NO (Normally Open) + 2 NC (Normally Closed) auxiliary contacts, it ensures precise switching in automation systems.
The 3RH2122-2BB40 is a crucial component in the SIRIUS modular system, specifically engineered for use in control circuits. This Size S00 contactor relay offers a powerful combination of efficiency and reliability. The integrated spring-loaded connections (push-in technology) significantly reduce installation time and guarantee maximum contact reliability, even in harsh industrial environments. It is the ideal choice for applications requiring fast signal processing and secure connections.
Reliable Performance: Ensures long-lasting, stable switching for industrial applications.
Compact Design: S00 frame size saves space in control panels.
Easy Installation: Spring-loaded terminals simplify wiring and maintenance.
Versatile Use: Suitable for various automation systems requiring precise control.
Energy Efficient: Low power consumption with 24V DC coil.
The 3RH2122-2BB40 contactor relay serves as a core switching element in automated control systems. Its primary function is to safely and reliably multiply control signals from a central unit (like a PLC) to manage or interlock secondary circuits.
Signal Multiplication: A low-power 24 V DC signal activates the coil.
Auxiliary Contact Control: Upon activation, the contacts (2 NO and 2 NC) switch simultaneously, enabling control over four separate circuits (two opened, two closed).
Interlocking: It is frequently used for electrical interlocking functions to prevent dangerous simultaneous operation of conflicting machines or processes.
This robust contactor relay is indispensable in:
Complex Machine Control: Used in the control panels of packaging machines, conveyors, and assembly lines.
Safety Circuits: Integrated into emergency stop chains and monitoring functions.
Switching Small Loads: Ideal for switching indicator lamps, solenoid valves, and intermediate relays.
PLC Output Expansion: Used to amplify and distribute signals from digital outputs of programmable logic controllers.
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| SKU / Model | 3RH2122-2BB40 |
|---|---|
| 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 NC contacts for auxiliary contacts | 2 |
| number of NO contacts for auxiliary contacts | 2 |
| ● instantaneous contact | 2 |
| identification number and letter for switching elements | 22 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 | spring-loaded terminals |
| type of connectable conductor cross-sections | - |
| ● for auxiliary contacts | - |
| — solid or stranded | 2x (0,5 ... 4 mm²) |
| — finely stranded with core end processing | 2x (0.5 ... 2.5 mm²) |
| — finely stranded without core end processing | 2x (0.5 ... 2.5 mm²) |
| ● at AWG cables for auxiliary contacts | 2x (20 ... 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 |
| other | Dangerous Good |
| last modified: | 11/10/2021 |
| Weight | 0.295 kg |
| Dimensions | 50.00 × 73.50 × 77.50 mm |
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