# Reversing Starter, MCU, IP55, 3RK4 Series, Three Phase, 1.6 A, 0.55 kW at 400 V

![Product image](https://novapart.co/image/farnell:3486209/)

**URL**: https://novapart.co/products/3RK4320-3ER51-1BA0/reversing-starter-mcu-ip55-3rk4-series-three-phase
**SKU**: 3RK4320-3ER51-1BA0
**Manufacturer**: SIEMENS
**Category**: Automation & Process Control || Motors & Motor Controls || Motor Starters
**Price**: €522.1600
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| No. Of Poles | 3 Pole |
| Power Rating | 550W |
| No. Of Phases | Three Phase |
| Product Range | SIRIUS MCU |
| Current Rating | 1.6A |
| Ip / Nema Rating | IP55 |
| Motor Starter Type | Reversing Starter |
| Supply Voltage Max | 440VAC |
| Supply Voltage Min | 340VAC |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3486209/)

**3RK4320-3ER51-1BA0** 

**Data sheet** 

SIRIUS MCU motor starter Enclosure degree of protection IP55 plastic Communication AS-Interface electromechanically switching Short-circuit protection with circuit breaker Reversing starter Brake without Performance class 1.60 A Motor circuit breaker with bi-metal thermal Manual operation without Connection power M screw connection Standard product 

|SIRIUSsmeu<br>Figure similar|SIRIUS MCU motor starter Enclosure degree of protection IP55 plastic<br>Communication AS-Interface electromechanically switching Short-circuit protection<br>with circuit breaker Reversing starter Brake without Performance class 1.60 A<br>Motor circuit breaker with bi-metal thermal Manual operation without Connection<br>power M screw connection Standard product|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|motor starter MCU for AS-Interface|
|**design of theproduct**|reversingstarter|
|product function bus communication|Yes|
|**operating frequency minimum**|80 1/h|
|**type of coordination**|1|
|**reference code according to IEC 81346-2**|Q|
|**Substance Prohibitance(day/month/year)**|05/01/2012|
|**SVHC substance name**|Lead monoxide (lead oxide) CAS-No. 1317-36-8<br>2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868-<br>10-5<br>Melamine CAS-No. 108-78-1|
|**Net Weight**|2.354 kg|
|**product component motor brake output**|No|
|**product feature**||
|● brake control with 400 V AC|No|
|● brake control with 24 V DC|No|
|● brake control with 180 V DC|No|
|● brake control with 500 V DC|No|
|**product extension braking module for brake control**|No|
|**design of short-circuitprotection**|circuit-breakers|
|maximum short-circuit current breaking capacity (Icu) at 400 V<br>rated value|50 000 A|
|**Safety related data**||
|**proportion of dangerous failures**||
|● with low demand rate accordingto SN 31920|50 %|
|● with high demand rate accordingto SN 31920|75 %|
|**B10 value with high demand rate according to SN 31920**|1 000 000|
|**failure rate [FIT] with low demand rate according to SN**<br>**31920**|100 FIT|
|IEC 61508||
|T1 value for proof test interval or service life according to IEC<br>61508|20 a|
|Electrical Safety||
|**touch protection against electrical shock**|finger-safe|
|**Main circuit**||
|**number ofpoles for main current circuit**|3|
|**design of the switching contact**|electromechanical|
|**adjustable current response value current of the current-**<br>**dependent overload release**|1.1 ... 1.6 A|



Subject to change without notice © Copyright Siemens 

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|**type of the motorprotection**|bimetal|bimetal|bimetal|
|---|---|---|---|
|**type of voltage**|DC|||
|operatingvoltage rated value|340 ... 440 V|||
|**operating frequency 1 rated value**|50 Hz|||
|**operating frequency 2 rated value**|60 Hz|||
|**relativepositive tolerance of the operating frequency**|10 %|||
|**relative negative tolerance of the operating frequency**|-10 %|||
|**operational current**||||
|● at AC at 400 V rated value|1.6 A|||
|● at AC-3 at 400 V rated value|1.6 A|||
|operating power at AC-3 at 400 V rated value|0.6 kW|||
|operating power for 3-phase motors at 400 V at 50 Hz|0.55 kW|||
|**number of digital inputs**|0|||
|**type of voltage of the supply voltage**|DC|||
|**control supply voltage at DC rated value**|20.4 ... 26.4 V|||
|**mounting position**|+/-180° rotation possible on vertical mounting surface; can be tilted forward and<br>backward by+/- 22.5° on vertical mountingsurface|||
|**height**|220 mm|||
|**width**<br>~~re~~|182 mm<br>~~re~~|||
|**depth**<br>~~re~~|145 mm<br>~~re~~|||
|**Ambient conditions**||||
|ambient temperature duringoperation|-25 ... +35 °C|||
|**protocol is supported**||||
|● PROFIBUS DPprotocol|No|||
|● PROFINETprotocol|No|||
|protocol is supported AS-Interfaceprotocol<br>~~re~~|Yes<br>~~re~~|||
|type of electrical connection for main current circuit<br>~~re~~|screw-type terminals<br>~~re~~|||
|**Approvals Certificates**||||
|**General Product Approval**||**Test Certificates**|**other**|



|Type Test Certific-<br>ates/Test Report|Confirmation|
|---|---|



**Dangerous goods Environment** Transport Information Environmental Confirmations 

**Further information** ~~TT—“CSC“‘CCNCSCSCSC(‘#$NSNCNWN’N’WCS“CWSCL~~ **Information on the packaging** https://support.industry.siemens.com/cs/ww/en/view/109813875 **Information for data generation and storage** https://support.industry.siemens.com/cs/ww/en/view/109995012 **Information- and Downloadcenter (Catalogs, Brochures,…)** https://www.siemens.com/ic10 **Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=3RK4320-3ER51-1BA0 **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RK4320-3ER51-1BA0 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RK4320-3ER51-1BA0 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RK4320-3ER51-1BA0&lang=en **Characteristic curves** https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> 

Subject to change without notice 

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**last modified:** 4/1/2025 

Subject to change without notice © Copyright Siemens 

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## Links

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- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/3rk4320-3er51-1ba0/motor-starter/dp/3486209)
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