# Thermal Magnetic Circuit Breaker, MPCB, 3RV2, 3P, 55 kA, 400 V, 25 A

![Product image](https://novapart.co/image/farnell:3447039/)

**URL**: https://novapart.co/products/3RV2021-4DA20-0BA0/thermal-magnetic-circuit-breaker-mpcb-3rv2-3p-55
**SKU**: 3RV2021-4DA20-0BA0
**Manufacturer**: SIEMENS
**Category**: Circuit Protection || Circuit Breakers || Thermal Magnetic Circuit Breakers
**Price**: €147.3700
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Product Range | SIRIUS 3RV2 Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3447039/)

**3RV2021-4DA20-0BA0** 

**Data sheet** 

Special type Circuit breaker size S0 for motor protection, CLASS 10 A-release 18...25 A N-release 325 A Spring-type terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles 

|**product brand name**|SIRIUS|
|---|---|
|**product designation**|Circuit breaker|
|**design of theproduct**|For motorprotection|
|**product type designation**|3RV2|
|**General technical data**||
|**Product equipment of circuit breaker for motor protection**|Yes|
|**complete unit withprotection device**||
|**size of the circuit-breaker**|S0|
|**size of contactor can be combined company-specific**|S00, S0|
|product function disconnector functionality|Yes|
|product extension auxiliaryswitch|Yes|
|**power loss[W] for rated value of the current**||
|● at AC in hot operatingstate|10.5 W|
|● at AC in hot operatingstateperpole|3.5 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|
|**maximumpermissible voltage forprotective separation**||
|● in networks with ungrounded star point between main and|400 V|
|auxiliarycircuit||
|● in networks with grounded star point between main and|400 V|
|auxiliarycircuit||
|**protection class IP**||
|● on the front accordingto IEC 60529|IP20|
|● on the front|IP20|
|● of the terminal|IP20|
|**shock resistance according to IEC 60068-2-27**|25g/ 11 ms|
|**mechanical service life(operating cycles)**||
|● of the main contacts typical|500|
|● of auxiliarycontacts typical|500|
|electrical endurance(operatingcycles)typical|500|
|**reference code according to IEC 81346-2**|Q|
|**continuous current rated value**|25 A|
|**Substance Prohibitance(day/month/year)**|10/01/2009|
|**Net Weight**|422g|
|**Ambient conditions**||
|installation altitude at height above sea level maximum|2 000 m|



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|**ambient temperature**||
|---|---|
|● duringoperation|-50 ... +60 °C|
|● duringstorage|-50 ... +80 °C|
|● duringtransport|-50 ... +80 °C|
|**temperature compensation**|-20 ... +60 °C|
|relative humidityduringoperation|10 ... 95 %|
|**Main circuit**||
|**number ofpoles for main current circuit**|3|
|**adjustable current response value current of the current-**<br>**dependent overload release**|18 ... 25 A|
|**type of voltage for main current circuit**|AC|
|**operating voltage**||
|● rated value|690 V|
|● rated value|20 ... 690 V|
|● at AC-3 rated value maximum|690 V|
|**operating frequency rated value**|50 ... 60 Hz|
|**operational current rated value**|25 A|
|**operational current**||
|● at AC-3 at 400 V rated value|25 A|
|**operating power**||
|● at AC-3||
|— at 230 V rated value|5.5 kW|
|— at 400 V rated value|11 kW|
|— at 500 V rated value|15 kW|
|— at 690 V rated value|22 kW|
|**operating frequency**||
|● at AC-3 maximum|15 1/h|
|**Auxiliary circuit**||
|**type of voltage for auxiliary and control circuit**|AC/DC|
|**number of NC contacts for auxiliary contacts**|0|
|**number of NO contacts for auxiliary contacts**|0|
|number of CO contacts for auxiliarycontacts|0|
|**Protective and monitoring functions**||
|**product function**||
|●ground fault detection|No|
|●phase failure detection|Yes|
|**trip class**|CLASS 10|
|**design of the overload release**|thermal|
|**protection function thermal overloadprotection(ANSI 49)**|Yes|
|**maximum short-circuit current breaking capacity (Icu)**||
|● at AC at 240 V rated value|50 kA|
|● at AC at 400 V rated value|50 kA|
|● at AC at 500 V rated value|10 kA|
|● at AC at 690 V rated value|4 kA|
|**operating short-circuit current breaking capacity (Ics) at AC**||
|● at 240 V rated value|25 kA|
|● at 400 V rated value|25 kA|
|● at 500 V rated value|5 kA|
|● at 690 V rated value|2 kA|
|response value current of instantaneous short-circuit trip unit|325 A|
|**Short-circuit protection**||
|**product function short circuitprotection**|Yes|
|**design of the short-circuit trip**|magnetic|
|**design of the fuse link for IT network for short-circuit**<br>**protection of the main circuit**||
|● at 400 V|gG 63 A|
|● at 500 V|gG 50 A|
|● at 690 V|gG 50 A|
|**Installation/ mounting/ dimensions**||



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||**mounting position**|any||
|---|---|---|---|
||**fastening method**|screw and snap-on mountingonto 35 mm DIN rail accordingto DIN EN 60715||
||**Mounting method of circuit breaker for Transformer**<br>**protection, Generator protection and system protection**<br>**optional standard bar mounting**|Yes||
||**height**|119 mm||
||**width**|45 mm||
||**depth**|97 mm||
||**required spacing**|||
||● with side-by-side mounting|||
||— forwards|0 mm||
||— backwards|0 mm||
||— upwards|50 mm||
||— downwards|50 mm||
||— at the side|0 mm||
||● forgroundedparts|||
||— forwards|0 mm||
||— backwards|0 mm||
||— upwards|50 mm||
||— at the side|30 mm||
||— downwards|50 mm||
||● for liveparts|||
||— forwards|0 mm||
||— backwards|0 mm||
||— upwards|50 mm||
||— downwards|50 mm||
||— at the side|30 mm||
||● forgroundedparts at 400 V|||
||— downwards|30 mm||
||— upwards|30 mm||
||— at the side|9 mm||
||● for liveparts at 400 V|||
||— downwards|30 mm||
||— upwards|30 mm||
||— at the side|9 mm||
||● forgroundedparts at 500 V|||
||— downwards|30 mm||
||— upwards|30 mm||
||— at the side|9 mm||
||● for liveparts at 500 V|||
||— downwards|30 mm||
||— upwards|30 mm||
||— at the side|9 mm||
||● forgroundedparts at 690 V|||
||— downwards|50 mm||
||— upwards|50 mm||
||— backwards|0 mm||
||— at the side|30 mm||
||— forwards|0 mm||
||● for liveparts at 690 V|||
||— downwards|50 mm||
||— upwards|50 mm||
||— backwards|0 mm||
||— at the side|30 mm||
||— forwards|0 mm||
||**Connections/ Terminals**|||
||**product component removable terminal for auxiliary and**<br>**control circuit**|No||
||**type of electrical connection**|||
||● for main current circuit|spring-loaded terminals||



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**arrangement of electrical connectors for main current** Top and bottom **circuit type of connectable conductor cross-sections** ● for main contacts — solid or stranded 2x (1 ... 10 mm²) — finely stranded with core end processing 2x (1 ... 6 mm²) — finely stranded without core end processing 2x (1 ... 6 mm²) **connectable conductor cross-section for main contacts** ● solid or stranded 1 ... 10 mm² ● finely stranded with core end processing 1 ... 6 mm² ● finely stranded without core end processing 1 ... 6 mm² **design of screwdriver shaft** Diameter 3 mm **size of the screwdriver tip** 3,0 x 0,5 mm IEC 61508 ~~a~~ **T1 value** ● for proof test interval or service life according to IEC 10 a 61508 ~~ee~~ Electrical Safety **protection class IP on the front according to IEC 60529** IP20 **touch protection on the front according to IEC 60529** finger-safe, for vertical contact from the front ~~ae~~ **Display** display version for switching status Handle **Approvals Certificates** ~~el~~ Environmental Product Declaration ● global warming potential [CO2 eq] / during manufacturing 2.68 kg ● global warming potential [CO2 eq] / during sales 0.143 kg ● global warming potential [CO2 eq] / during operation 72.7 kg ● global warming potential [CO2 eq] / after end of life -0.445 kg ● global warming potential [CO2 eq] / total 75.078 kg **Environment General Product Approval** 

Environmental Confirmations 

|**General Product Approval**||||**Test Certificates**||
|---|---|---|---|---|---|
|||||Special Test Certific-|Type Test Certific-|
|||||ate|ates/Test Report|
|**Maritime application**||||||
|°|ELLAREES||=e|@||
|**other**|||||**Railway**|
|Confirmation|Miscellaneous|Confirmation|Miscellaneous||Confirmation|
|~~re~~||||||
|||||QC PASS||
|**Railway**||||||



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- Special Test Certific ate 

**Further information 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=3RV2021-4DA20-0BA0 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RV2021-4DA20-0BA0 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RV2021-4DA20-0BA0&lang=en **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RV2021-4DA20-0BA0 **Characteristic curves** https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> 

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**last modified:** 

5/5/2026 

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## Links

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- [Supplier page](https://es.farnell.com/siemens/3rv2021-4da20-0ba0/thermal-magnetic-circuit-breaker/dp/3447039)
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