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3RV2121-4BA10
Thermal Magnetic Circuit Breaker, MPCB, 3RV2, 3P, 55 kA, 400 V, 20 A
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: SIEMENS
- Product type: Thermal Magnetic Circuit Breakers
- Product Range: SIRIUS 3RV2 Series
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 142.38 € |
| Current stock | 10+ |
| Lead time | 30 days |
**3RV2121-4BA10** **Data sheet** circuit breaker frame size S0 for motor protection, Class 10 with overload relay function thermal release 13...20 A short-circuit release 260 A screw terminal standard switching capacity |**product brand name**|SIRIUS| |---|---| |**product designation**|Circuit breaker| |**design of theproduct**|For motorprotection with overload relayfunction| |**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|100 000| |● of auxiliarycontacts typical|100 000| |electrical endurance(operatingcycles)typical|100 000| |**reference code according to IEC 81346-2**|Q| |**continuous current rated value**|20 A| |**Substance Prohibitance(day/month/year)**|10/01/2009| |**Net Weight**|0.42 kg| |**Ambient conditions**|| |installation altitude at height above sea level maximum|2 000 m| Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 1/7 6/1/2026 |**ambient temperature**|| |---|---| |● duringoperation|-20 ... +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**|13 ... 20 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| |● at AC-3e rated value maximum|690 V| |**operating frequency rated value**|50 ... 60 Hz| |**operational current rated value**|20 A| |**operational current**|| |● at AC-3 at 400 V rated value|20 A| |● at AC-3e at 400 V rated value|20 A| |**operating power**|| |● at AC-3|| |— at 230 V rated value|5.5 kW| |— at 400 V rated value|7.5 kW| |— at 500 V rated value|11 kW| |— at 690 V rated value|15 kW| |● at AC-3e|| |— at 230 V rated value|5.5 kW| |— at 400 V rated value|7.5 kW| |— at 500 V rated value|11 kW| |— at 690 V rated value|15 kW| |**operating frequency**|| |● at AC-3 maximum|15 1/h| |● at AC-3e maximum|15 1/h| |**Auxiliary circuit**|| |**design of the auxiliary switch**|laterally| |**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| |**operational current of auxiliary contacts at AC-15**|| |● at 24 V|1.5 A| |● at 230 V|1.5 A| |**operational current of auxiliary contacts at DC-13**|| |● at 24 V|1 A| |**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|100 kA| |● at AC at 400 V rated value|55 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**|| Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 2/7 6/1/2026 ||● at 240 V rated value|100 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|260 A|| ||**UL/CSA ratings**||| ||**full-load current(FLA) for 3-phase AC motor**||| ||● at 480 V rated value|20 A|| ||● at 600 V rated value|20 A|| ||**yielded mechanicalperformance[hp]**||| ||● for single-phase AC motor||| ||— at 110/120 V rated value|1.5 hp|| ||— at 230 V rated value|3 hp|| ||● for 3-phase AC motor||| ||— at 200/208 V rated value|7.5 hp|| ||— at 220/230 V rated value|5 hp|| ||— at 460/480 V rated value|10 hp|| ||**contact rating of auxiliary contacts according to UL**|C600 / R300|| ||**UL File Number(CCN)**|E47705(NLRV, NLRV7)|| ||**Short-circuit protection**||| ||**product function short circuitprotection**|Yes|| ||**design of the short-circuit trip**|magnetic|| ||**design of the fuse link**||| ||● for short-circuitprotection of the auxiliaryswitch required|fusegL/gG: 6 A,quick: 10 A|| ||**design of the fuse link for IT network for short-circuit**<br>**protection of the main circuit**||| ||● at 400 V|gL/gG 63 A|| ||● at 500 V|gL/gG 50 A|| ||● at 690 V|gL/gG 50 A|| ||**Installation/ mounting/ dimensions**||| ||**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**|97 mm|| ||**width**|65 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|| Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 3/7 6/1/2026 |— 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|screw-type terminals| |● for auxiliaryand control circuit|screw-type terminals| |**arrangement of electrical connectors for main current**<br>**circuit**|Top and bottom| |**type of connectable conductor cross-sections**|| |● for main contacts|| |— solid or stranded|2x(1 ... 2.5 mm²), 2x(2.5 ... 10 mm²)| |— finelystranded with core endprocessing|2x(1 ... 2.5 mm²), 2x(2.5 ... 6 mm²), 1x 10 mm²| |● for AWG cables for main contacts|2x(16 ... 12), 2x(14 ... 8)| |**connectable conductor cross-section for main contacts**|| |● solid or stranded|1 ... 10 mm²| |● finelystranded with core endprocessing|1 ... 10 mm²| |**connectable conductor cross-section for auxiliary contacts**|| |● solid or stranded|0.5 ... 2.5 mm²| |● finelystranded with core endprocessing|0.5 ... 2.5 mm²| |**type of connectable conductor cross-sections**|| |● for auxiliarycontacts|| |— solid or stranded|2x(0.5 ... 1.5 mm²), 2x(0.75 ... 2.5 mm²)| |— finelystranded with core endprocessing|2x(0.5 ... 1.5 mm²), 2x(0.75 ... 2.5 mm²)| |● for AWG cables for auxiliarycontacts|2x(20 ... 16), 2x(18 ... 14)| |**AWG number as coded connectable conductor cross**<br>**section for main contacts**|16 ... 8| |**AWG number as coded connectable conductor cross**<br>**section for auxiliary contacts**|20 ... 14| |**tightening torque**|| |● for main contacts with screw-type terminals|2 ... 2.5 N·m| |● for auxiliarycontacts with screw-type terminals|0.8 ... 1.2 N·m| |**design of screwdriver shaft**|Diameter 5 to 6 mm| |**size of the screwdriver tip**|Pozidriv size 2| |**design of the thread of the connection screw**|| |● for main contacts|M4| Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 4/7 6/1/2026 |● of the auxiliaryand control contacts|M3| |---|---| |**Safety related data**<br>~~|~~|| |product function suitable for safetyfunction<br>~~|~~|Yes<br>~~|~~| |**suitability for use**|| |● safety-related switchingon|No| |● safety-related switchingOFF|Yes| |**service life maximum**|10 a| |**test wear-related service life necessary**|Yes| |**proportion of dangerous failures**|| |● with low demand rate accordingto SN 31920|40 %| |● with high demand rate accordingto SN 31920|50 %| |**B10 value with high demand rate according to SN 31920**|5 000| |**failure rate [FIT] with low demand rate according to SN**<br>**31920**<br>~~ee~~|50 FIT<br>~~ee~~| |ISO 13849<br>~~ee~~|| |**device type according to ISO 13849-1**<br>~~ee~~<br>~~ny~~|3<br>~~ee~~<br>~~ny~~| |**overdimensioning according to ISO 13849-2 necessary**<br>~~ny~~|Yes<br>~~ny~~| |IEC 61508<br>~~ny~~|| |**safety device type according to IEC 61508-2**<br>~~ny~~|Type A<br>~~ny~~| |**T1 value**|| |● for proof test interval or service life according to IEC<br>61508<br>~~ee~~|10 a<br>~~ee~~| |Electrical Safety<br>~~ee~~|| |**protection class IP on the front according to IEC 60529**<br>~~ee~~|IP20<br>~~ee~~| |**touch protection on the front according to IEC 60529**|finger-safe, for vertical contact from the front| |**Display**<br>~~|~~|| |displayversion for switchingstatus<br>~~|~~|Handle<br>~~|~~| |**Approvals Certificates**<br>~~ee~~|| |Environmental Product Declaration<br>● global warming potential [CO2 eq] / during manufacturing<br>2.68 kg<br>● global warming potential [CO2 eq] / during sales<br>0.143 kg<br>● global warming potential [CO2 eq] / during operation<br>72.7 kg<br>● global warming potential [CO2 eq] / after end of life<br>-0.445 kg<br>● global warming potential [CO2 eq] / total<br>75.078 kg<br>**Environment**<br>**General Product Approval**<br>~~ee~~|| Environmental Confirmations ~~——_—_~~ © § & **General Product Approval Test Certificates** - Special Test Certific ate FAL UK ~~———~~ ARY cf cA **Test Certificates Maritime application** - Type Test Certific ates/Test Report Sera **Maritime application other** Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 5/7 6/1/2026 ~~——~~ Confirmation ~~oe~~ Confirmation Miscellaneous Miscellaneous ## **Railway** Confirmation Special Test Certificate ~~a~~ **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=3RV2121-4BA10 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3RV2121-4BA10 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, EPLAN macros, ...)** https://www.automation.siemens.com/bilddb/cax_de.aspx?mlfb=3RV2121-4BA10&lang=en **Cax online generator** https://support.automation.siemens.com/WW/CAXorder/default.aspx?lang=en&mlfb=3RV2121-4BA10 **Characteristic curves** https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 6/7 6/1/2026 **==> picture [378 x 359] intentionally omitted <==** **----- Start of picture text -----**<br> TEST<br>|<br>-F<br>co<br>co<br> Po}a l 2<br>I> I> I><br>TIT<br>5/5/2026<br>1/L1 3/L2 5/L3 95 97<br>T1 T2 T3 96 98<br>/ / /<br>2 4 6<br>**----- End of picture text -----**<br> **==> picture [49 x 6] intentionally omitted <==** **----- Start of picture text -----**<br> last modified:<br>**----- End of picture text -----**<br> Subject to change without notice © Copyright Siemens 3RV21214BA10 Page 7/7 6/1/2026
Updated at April 27, 2026
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