# Load Feeder, Fuseless, Direct On Line, 3RA2, Three Phase, 23 A to 28 A, 24 VDC, Spring Terminal

![Product image](https://novapart.co/image/farnell:3524582/)

**URL**: https://novapart.co/products/3RA2120-4NH27-0BB4/load-feeder-fuseless-direct-on-line-3ra2-three
**SKU**: 3RA2120-4NH27-0BB4
**Manufacturer**: SIEMENS
**Category**: Automation & Process Control || Motors & Motor Controls || Motor Starters
**Price**: €335.8700
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3524582/)

**3RA2120-4NH27-0BB4** 

**Data sheet** 

Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 23.0...28.0 A 24 V DC Spring-type terminal for 60 mm busbar systems (also fulfills type of coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor) 

||Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 23.0...28.0 A 24 V<br>DC Spring-type terminal for 60 mm busbar systems (also fulfills type of<br>coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (contactor)|
|---|---|
|**product brand name**|SIRIUS|
|**product designation**|Direct(on-line)starter|
|**design of theproduct**|for 60 mm busbars|
|**product type designation**|3RA21|
|**manufacturer's article number**||
|● of the supplied contactor|3RT2027-2BB40|
|● of the supplied circuit-breakers|3RV2021-4NA20|
|● of the supplied busbar adapter|8US1251-5NT11|
|● of the supplied link module|3RA2921-2AA00|
|**General technical data**<br>~~|~~||
|**size of the circuit-breaker**<br>~~|~~|S0<br>~~|~~|
|**size of load feeder**|S0|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstateperpole|6.7 W|
|● without load current share typical|5.9 W|
|**type of calculation ofpower loss current-dependent**|quadratic|
|insulation voltage with degree ofpollution 3 at AC rated value|690 V|
|**surge voltage resistance rated value**|6 kV|
|**degree ofprotection NEMA rating**|other|
|**shock resistance according to IEC 60068-2-27**|6g/ 11 ms|
|mechanical service life(operatingcycles)of contactor typical|10 000 000|
|**type of coordination**|2|
|**reference code according to IEC 81346-2:2019**|Q|
|**Substance Prohibitance(day/month/year)**|10/01/2009|
|**Net Weight**|1.603 kg|
|**Ambient conditions**<br>~~ee~~||
|**ambient temperature**<br>~~ee~~|~~ee~~|
|● duringoperation|-20 ... +60 °C|
|● duringstorage|-50 ... +80 °C|
|● duringtransport|-50 ... +80 °C|
|**temperature compensation**|-20 ... +60 °C|
|relative humidityduringoperation|10 ... 95 %|
|**Main circuit**<br>~~ee~~||
|**number ofpoles for main current circuit**<br>~~ee~~|3<br>~~ee~~|
|**design of the switching contact**|electromechanical|
|**adjustable current response value current of the current-**<br>**dependent overload release**|23 ... 28 A|
|**operating voltage**||
|● rated value|690 V|



Subject to change without notice © Copyright Siemens 

3RA21204NH270BB4 Page 1/3 

5/31/2026 

|● at AC-3 rated value maximum|690 V|
|---|---|
|● at AC-3e rated value maximum|690 V|
|**operating frequency rated value**|50 ... 60 Hz|
|**operational current**||
|● at AC-3 at 400 V rated value|28 A|
|● at AC-3e at 400 V rated value|28 A|
|**operating power**||
|● at AC-3||
|— at 400 V rated value|15 000 W|
|● at AC-3e||
|— at 400 V rated value|15 000 W|
|**Control circuit/ Control**||
|**type of voltage of the control supply voltage**|DC|
|**control supply voltage at DC rated value**|24 V|
|**holding power of magnet coil at DC**|5.9 W|
|**Auxiliary circuit**||
|**product extension auxiliary switch**|Yes|
|**Protective and monitoring functions**||
|**trip class**|CLASS 10|
|**design of the overload release**|thermal(bimetallic)|
|response value current of instantaneous short-circuit trip unit|364 A|
|**UL/CSA ratings**||
|**full-load current(FLA) for 3-phase AC motor**||
|● at 480 V rated value|27 A|
|● at 600 V rated value|27 A|
|**yielded mechanicalperformance[hp]**||
|● for single-phase AC motor||
|— at 110/120 V rated value|2 hp|
|— at 230 V rated value|5 hp|
|● for 3-phase AC motor||
|— at 200/208 V rated value|7.5 hp|
|— at 220/230 V rated value|10 hp|
|— at 460/480 V rated value|20 hp|
|**Short-circuit protection**||
|**product function short circuitprotection**|Yes|
|**design of the short-circuit trip**|magnetic|
|**conditional short-circuit current(Iq)**||
|● at 400 V accordingto IEC 60947-4-1 rated value|150 000 A|
|**Installation/ mounting/ dimensions**||
|**mounting position**|vertical|
|**fastening method**|for snappingonto 60 mm busbar systems|
|**height**|260 mm|
|**width**|45 mm|
|**depth**|165 mm|
|**required spacing**||
|● forgroundedparts||
|— forwards|20 mm|
|— backwards|0 mm|
|— upwards|50 mm|
|— at the side|20 mm|
|— downwards|10 mm|
|● for liveparts||
|— forwards|20 mm|
|— backwards|0 mm|
|— upwards|50 mm|
|— downwards|10 mm|
|— at the side|20 mm|
|**Connections/ Terminals**||



Subject to change without notice © Copyright Siemens 

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5/31/2026 

|**type of electrical connection**|||||||
|---|---|---|---|---|---|---|
|● for main current circuit|||spring-loaded terminals||||
|● for auxiliaryand control circuit|||spring-loaded terminals||||
|**Safety related data**<br>~~a~~|||||||
|product function suitable for safetyfunction|||Yes||||
|Electrical Safety<br>**touch protection on the front according to IEC 60529**<br>finger-safe, for vertical contact from the front<br>~~a~~|||||||
|**Communication/ Protocol**<br>~~a~~|||||||
|**protocol is supported**|||||||
|● PROFINET IOprotocol|||No||||
|● PROFIsafeprotocol<br>~~re~~|||No||||
|protocol is supported AS-Interface protocol|||No||||
|**Approvals Certificates**|||||||
|**Environment**<br>**General Product Approval**|||||**For use in hazard-**<br>**ous locations**|**Test Certificates**|
|Environmental Con-||||||Type Test Certific-|
|firmations||||||ates/Test Report|
|**Test Certificates**<br>**Maritime application**|||||||
|Special Test Certific-|||||||
|ate|||||||
|**Maritime application**|**other**|||||**Railway**|
||Confirmation<br>Confirmation<br>~~een~~s)|||||Special Test Certific-<br>ate|
|**Dangerous goods**|||||||
|Transport Information|||||||



~~e~~ **Further information** ~~e~~ **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=3RA2120-4NH27-0BB4 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RA2120-4NH27-0BB4 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RA2120-4NH27-0BB4&lang=en **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RA2120-4NH27-0BB4 **Characteristic curves** https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> ~~re~~ **last modified:** 4/24/2026 

Subject to change without notice © Copyright Siemens 

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5/31/2026 



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- [Supplier page](https://es.farnell.com/siemens/3ra2120-4nh27-0bb4/motor-starter/dp/3524582)
---

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