3RA2120-4AE26-0BB4

**3RA2120-4AE26-0BB4** 

## **Data sheet** 

Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 10...16 A 24 V DC Spring-type terminal for installation on standard mounting rail (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 10...16 A 24 V DC<br>Spring-type terminal for installation on standard mounting rail (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 DIN-rail or screw mounting|
|**product type designation**|3RA21|
|**manufacturer's article number**||
|● of the supplied contactor<br>~~———————~~|3RT2026-2BB40|
|● of the supplied circuit-breakers<br>~~———————~~|3RV2021-4AA20|
|● of the supplied link module<br>~~———————~~|3RA2921-2AA00|
|**General technical data**<br>~~———————~~||
|**size of the circuit-breaker**<br>~~———————~~|S0|
|**size of load feeder**|S0|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstateperpole|5 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|
|**SVHC substance name**|Lead CAS-No. 7439-92-1|
|**Net Weight**|1.157 kg|
|**Ambient conditions**<br>~~|~~||
|**ambient temperature**<br>~~|~~|~~|~~|
|● duringoperation|-20 ... +60 °C|
|● duringstorage|-50 ... +80 °C|
|● duringtransport|-50 ... +80 °C|
|**temperature compensation**|-20 ... +60 °C|
|relative humidityduringoperation|10 ... 95 %|
|**Main circuit**<br>~~|~~||
|**number ofpoles for main current circuit**<br>~~|~~|3<br>~~|~~|
|**design of the switching contact**|electromechanical|
|**adjustable current response value current of the current-**<br>**dependent overload release**|10 ... 16 A|
|**operating voltage**||
|● rated value|690 V|



Subject to change without notice © Copyright Siemens 

3RA21204AE260BB4 Page 1/5 

6/2/2026 

|● 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|16 A|
|● at AC-3e at 400 V rated value|16 A|
|**operating power**||
|● at AC-3||
|— at 400 V rated value|7 500 W|
|● at AC-3e||
|— at 400 V rated value|7 500 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|208 A|
|**UL/CSA ratings**||
|**full-load current(FLA) for 3-phase AC motor**||
|● at 480 V rated value|16 A|
|● at 600 V rated value|16 A|
|**yielded mechanicalperformance[hp]**||
|● for single-phase AC motor||
|— at 110/120 V rated value|1 hp|
|— at 230 V rated value|2 hp|
|● for 3-phase AC motor||
|— at 200/208 V rated value|2 hp|
|— at 220/230 V rated value|5 hp|
|— at 460/480 V rated value|10 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**|screw and snap-on mountingonto 35 mm DIN rail|
|**height**|243 mm|
|**width**|45 mm|
|**depth**|107 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 

3RA21204AE260BB4 Page 2/5 

6/2/2026 

|**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**|
|Environmental Con-<br>firmations<br>~~_~~<br>FE||||<€|eg|®&|
|**Test Certificates**<br>**Maritime application**|||||||
|Special Test Certific-<br>Type Test Certific-|||||||
|ate<br>ates/Test Report|||||||
||||renitas!||||
|**Maritime application**|||**other**||||
|®|||Confirmation<br>Confirmation<br>~~lee~~s||||
|**Railway**<br>**Dangerous goods**|||||||
|Special Test Certific-<br>Transport Information|||||||
|ate|||||||
|**Further information**<br>~~ee~~|||||||
|**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=3RA2120-4AE26-0BB4|||||||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**|||||||
|https://support.industry.siemens.com/cs/ww/en/ps/3RA2120-4AE26-0BB4|||||||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)**||||**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)**|||
|https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RA2120-4AE26-0BB4&lang=en|||||||
|**Cax online generator**|||||||
|https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RA2120-4AE26-0BB4|||||||
|**Characteristic curves**|||||||
|https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no>|||||||



Subject to change without notice © Copyright Siemens 

3RA21204AE260BB4 Page 3/5 

6/2/2026 

**==> picture [511 x 718] intentionally omitted <==**

Subject to change without notice © Copyright Siemens 

3RA21204AE260BB4 Page 4/5 

6/2/2026 

**==> picture [362 x 368] intentionally omitted <==**

**----- Start of picture text -----**<br>
-Q<br>F<br>-Q1<br>ll<br>I> I> I><br>-Q11<br>last modified: 4/24/2026<br>NO NC<br>A1+ 1/L1 3/L2 5/L3 13 21<br>A2- T1/ T2/ T3/ ON CN<br>2 4 6<br>14 22<br>**----- End of picture text -----**<br>


Subject to change without notice © Copyright Siemens 

3RA21204AE260BB4 Page 5/5 

6/2/2026