# Circuit Breaker, MCB, 5SY8, 4P, 25 kA, 400 V, 6 A

![Product image](https://novapart.co/image/farnell:3477079/)

**URL**: https://novapart.co/products/5SY8406-8/circuit-breaker-mcb-5sy8-4p-25-ka-400-v-6-a
**SKU**: 5SY8406-8
**Manufacturer**: SIEMENS
**Price**: €250.3900
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Product Range | SENTRON Series |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3477079/)

**5SY8406-8** 

**Data sheet** 

Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 4P, D6 

||Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 4P, D6|
|---|---|
|**Model**<br>~~ees~~||
|**product brand name**<br>~~ees~~|SENTRON<br>~~ees~~|
|**product designation**|Miniature circuit breaker|
|**General technical data**<br>~~eee~~||
|**number ofpoles**<br>~~eee~~|4<br>~~eee~~|
|**design ofpole**|4P|
|**tripping characteristic class**|D|
|**mechanical service life(operating cycles) typical**|10 000|
|**overvoltage category**|3|
|**degree of pollution**|3|
|**Voltage**<br>~~eee~~||
|**type of voltage of the operating voltage**<br>~~eee~~|AC<br>~~eee~~|
|**insulation voltage (Ui)**||
|● with single-phase operation at AC rated value|440 V|
|● with multi-phase operation at AC rated value|440 V|
|**supply voltage with single-phase operation at AC rated**<br>**value**|230 V|
|||
|**● operational current**||
|— at 50 °C rated value|5.85 A|
|— at 55 °C rated value|5.69 A|
|**● operational current at AC rated value**|6 A|
|**Supply voltage**<br>~~eee~~||
|**supply voltage**<br>~~eee~~|~~eee~~|
|● at AC|400 V|
|● at DC rated value|60 V|
|**value range of the supply voltage frequency**|50/60 Hz|
|operatingvoltage at DC rated value maximum|72 V|
|**Protection class**<br>~~ess~~||
|**protection class IP**<br>~~ess~~|IP20, with connected conductors<br>~~ess~~|
|**Breaking Capacity**<br>~~eee~~||
|**switching capacity current**<br>~~eee~~|~~eee~~|
|● at DC accordingto IEC 60947-2 rated value|15 kA|
|● accordingto IEC 60947-2 rated value|50 kA|
|**energy limitation class**|3|
|**Dissipation**<br>~~eee~~||
|power loss [W] for rated value of the current at AC in hot<br>operatingstateperpole<br>~~eee~~|1.6 W<br>~~eee~~|
|**suitability for operation**|Infrastructure / Industry|



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|**Product details**|**Product details**|
|---|---|
|**product feature touchprotection**|Yes|
|**product component**||
|● combined terminal top|Yes|
|● combined terminal bottom|Yes|
|● neutral conductor switching|No|
|**product feature properties for main switches in accordance**<br>**with EN 60204-1**|Yes|
|**product feature halogen-free**|Yes|
|**product feature sealable**|Yes|
|**product feature silicon-free**|Yes|
|**product extension installable supplementary devices**|Yes|
|**Product function**||
|**set values setting current(Ii) for I-tripping**|14|
|**reference value setting current(Ii) for I-tripping**|x In|
|**Short circuit**||
|**short-circuit current breaking capacity (Icn)**||
|● at AC accordingto UL 1077 and CSA C22.2 No.235|5 kA|
|**Connections**||
|**connectable conductor cross-section solid**||
|● minimum|0.75 mm²|
|● maximum|35 mm²|
|**connectable conductor cross-section stranded**||
|● minimum|0.75 mm²|
|● maximum|35 mm²|
|**connectable conductor cross-section finely stranded with**<br>**core endprocessing**||
|● minimum|0.75 mm²|
|● maximum|25 mm²|
|**AWG number as coded connectable conductor cross**<br>**section**||
|● minimum|18|
|● maximum|4|
|**tightening torque[lbf·in] with screw-type terminals**||
|● minimum|22 lbf·in|
|● maximum|31 lbf·in|
|**tightening torque with screw-type terminals**||
|● minimum|2.5 N·m|
|● maximum|3.5 N·m|
|**position of power supply cord**|Any|
|**Mechanical Design**||
|**height**|90 mm|
|**width**|72 mm|
|**depth**|76 mm|
|**installation depth**|70 mm|
|**number of modular width units**|4|
|**fastening method**|DIN rail|
|**mounting position**|any|
|**Net Weight**|609g|
|**Environmental conditions**||
|**influence of the surrounding temperature**|max. 95% RH upto 55°C|
|**standard**|IEC / EN 60947-2 / UL1077|
|**vibration resistance according to IEC 60068-2-6**|±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz|
|**ambient temperature during operation**||
|● minimum|-25 °C|
|● maximum|55 °C|
|**ambient temperature during storage**||
|● minimum|-40 °C|
|● maximum|75 °C|



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**number of test cycles for environmental testing according** 6 **to IEC 60068-2-30** ~~a~~ **Approvals Certificates Environment General Product Approval** Environmental ConEnvironmental ConMiscellaneous firmations firmations **General Product Approval other** Confirmation ~~rn~~ ; ee Confirmation ~~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=5SY8406-8 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5SY8406-8 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5SY8406-8 **CAx-Online-Generator** https://www.siemens.com/cax **Tender specifications** https://www.siemens.com/specifications **Characteristic curves** https://curves.simaris.siemens.com/curves/<mmp_prod_noCOMP="HAUPT"></mmp_prod__no> 

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## Links

- [View this product on Novapart](https://novapart.co/products/5SY8406-8/circuit-breaker-mcb-5sy8-4p-25-ka-400-v-6-a)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/5sy8406-8/rcbo-rcd-gfci-afdd-circuit-breakers/dp/3477079)
---

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