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5SJ6120-6KS
Circuit Breaker, MCB, 5SJ6, 1P, 6 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:
- Product Range: SENTRON Series
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 12.01 € |
| Current stock | 10+ |
| Lead time | 30 days |
**5SJ6120-6KS** **Data sheet** Miniature circuit breaker 230/400 V 6kA, 1-pole, B, 20 A, D=70 mm with screwless outgoing terminals |**Model**|| |---|---| |**product brand name**|SENTRON| |**product designation**|Miniature circuit breaker| |**design of the product**|Miniature circuit breaker 5SJ6| |**General technical data**|| |**number ofpoles**|1| |**design ofpole**|1P| |**tripping characteristic class**|B| |**mechanical service life(operating cycles) typical**|20 000| |**overvoltage category**|3| |**degree of pollution**|2| |**Voltage**|| |insulation voltage(Ui)at AC rated value|440 V| ||| |**● operational current at AC rated value**|20 A| |**Supply voltage**|| |**supply voltage**|| |● at AC|400 V| |● at DC rated value|60 V| |**operating voltage**|| |● with multi-phase operation at AC maximum|440 V| |● at DC rated value maximum|60 V| |supplyvoltage frequencyrated value|50 Hz| |**Protection class**|| |**protection class IP**|IP20, with connected conductors| |**Breaking Capacity**|| |**switching capacity current**|| |● accordingto EN 60898 rated value|6 kA| |● accordingto IEC 60947-2 rated value|6 kA| |**energy limitation class**|3| |**Dissipation**|| |power loss [W] for rated value of the current at AC in hot|2.2 W| |operatingstateperpole|| |**suitability for operation**|Residential buildings/infrastructure| |**Product details**|| |**product feature touchprotection**|Yes| |product component neutral conductor switching|No| |**product feature halogen-free**|Yes| 5SJ61206KS Page 1/4 Subject to change without notice © Copyright Siemens 6/4/2026 |**product feature sealable**|**product feature sealable**|Yes| |---|---|---| |**product feature silicon-free**||Yes| |**product extension installable supplementary devices**<br>~~SS~~||No<br>~~SS~~| |**Connections**||| |**connectable conductor cross-section on plug-type**<br>**connection using the upper clamping point without core**<br>**endprocessing**||| |● minimum||1.5 mm²| |● maximum||4 mm²| |**connectable conductor cross-section solid**||| |● minimum||0.75 mm²| |● maximum||25 mm²| |**connectable conductor cross-section stranded**||| |● minimum||0.75 mm²| |● maximum||25 mm²| |**connectable conductor cross-section finely stranded with**<br>**core endprocessing**||| |● minimum||1.5 mm²| |● maximum||2.5 mm²| |**Mechanical Design**<br>~~ee~~||| |**height**<br>~~ee~~||90 mm<br>~~ee~~| |**width**||18 mm| |**depth**||76 mm| |**installation depth**||70 mm| |**number of modular width units**||1| |**fastening method**||DIN rail| |**mounting position**<br>~~——~~||any<br>~~——~~| |**Net Weight**<br>~~——~~||127g<br>~~——~~| |**Environmental conditions**||| |**influence of the surrounding temperature**||Periodically+55°C, max. 95% humidity| |**ambient temperature during operation**||| |● minimum||-25 °C| |● maximum||45 °C| |**ambient temperature during storage**||| |● minimum||-40 °C| |● maximum||75 °C| |**Approvals Certificates**<br>~~ee~~||| |**Environment**<br>~~ee~~<br>~~—~~|**General Product Approval**<br>~~ee~~<br>&mW<br>cx|| ~~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/lowvoltage/catalogs **Industry Mall (Online ordering system)** https://mall.industry.siemens.com/mall/en/en/Catalog/product?mlfb=5SJ6120-6KS **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5SJ6120-6KS 5SJ61206KS Page 2/4 Subject to change without notice © Copyright Siemens 6/4/2026 **==> picture [348 x 213] intentionally omitted <==** **----- Start of picture text -----**<br> Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)<br>https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5SJ6120-6KS<br>CAx-Online-Generator<br>https://www.siemens.com/cax<br>Tender specifications<br>https://www.siemens.com/specifications<br>Characteristic curves<br>https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no><br>1<br>2<br>18 6 44<br>70<br>last modified: 7/19/2025<br>45 90<br>I2Y1_00011<br>**----- End of picture text -----**<br> 5SJ61206KS Page 3/4 Subject to change without notice © Copyright Siemens 6/4/2026 5SJ61206KS Page 4/4 Subject to change without notice © Copyright Siemens 6/4/2026
Updated at June 7, 2026
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