SIEMENS
The Siemens 3RH2122-1AP00 is a Size S00 contactor relay featuring 2 NO and 2 NC auxiliary contacts, a 230 V AC coil, and secure screw terminals. Ideal for robust control and signaling circuits.
The Siemens 3RH2122-1AP00 is a highly reliable and compact contactor relay from the SIRIUS 3R family, designed for controlling and signaling circuits in various industrial applications. As a fundamental component in motor and control systems, it is engineered for consistent, long-term performance.
This specific model is distinguished by its configuration of four auxiliary contacts: 2 normally open (2 NO) and 2 normally closed (2 NC), making it versatile for complex switching tasks. It operates using a standard 230 V AC coil (50/60 Hz) and utilizes secure screw terminals for straightforward and robust wiring. Its compact Size S00 construction ensures minimal panel space requirement.
Reliable Switching: Guarantees precise and dependable control of auxiliary circuits.
Space-Saving Design: The compact S00 size allows for high-density mounting in control cabinets.
Global Standard: As a Siemens product, it offers high quality, compliance with international standards, and easy integration into existing SIRIUS systems.
Versatile Contact Arrangement: The 2 NO + 2 NC combination offers flexibility for interlocking, signaling, and sequence control applications.
Easy Installation: Robust screw terminals ensure a secure, maintenance-friendly electrical connection.
The 3RH2122-1AP00 contactor relay is primarily used to multiply auxiliary contacts of a primary control device (like a main contactor, circuit breaker, or PLC). Typical applications include:
Interlocking Circuits: Preventing conflicting operations (e.g., ensuring two motors cannot run simultaneously).
Signaling and Indication: Providing status feedback to PLCs, HMI screens, or indicator lamps.
Sequence Control: Starting or stopping other components in a predefined order.
Control Circuit Amplification: Handling higher current loads than a PLC output can manage.
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| SKU / Model | 3RH2122-1AP00 |
|---|---|
| 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 DC | 10 000 1/h |
| type of voltage of the control supply voltage | AC |
| control supply voltage at AC | - |
| ● at 50 Hz rated value | 230 V |
| ● at 60 Hz rated value | 230 V |
| control supply voltage frequency | - |
| ● 1 rated value | 50 Hz |
| ● 2 rated value | 60 Hz |
| operating range factor control supply voltage rated value of magnet coil at AC | - |
| ● at 50 Hz | 0.8 ... 1.1 |
| ● at 60 Hz | 0.85 ... 1.1 |
| apparent pick-up power of magnet coil at AC | 37 V·A |
| inductive power factor with closing power of the coil | 0.8 |
| apparent holding power of magnet coil at AC | 5.7 V·A |
| inductive power factor with the holding power of the coil | 0.25 |
| closing delay | - |
| opening delay | - |
| ● at AC | 4 ... 15 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 | 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 |
| last modified: | 12/1/2021 |
| Weight | 0.232 kg |
| Dimensions | 50.00 × 61.50 × 77.50 mm |
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