# Auxiliary Current Switch, DPST-NC, 5SL, 5SY, 5SP Series MCB, 5SU1 Series RCBO & FI 5SV Series MCCB
**URL**: https://novapart.co/products/5ST3012/auxiliary-current-switch-dpst-nc-5sl-5sy-5sp
**SKU**: 5ST3012
**Manufacturer**: SIEMENS
**Category**: Circuit Protection || Circuit Breakers || Circuit Breaker Accessories
**Price**: €20.7900
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Product Range | SENTRON Series |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3556497/)
**5ST3012**
**Data sheet**
auxiliary switch 2 NC for miniature circuit breakers 5SL, 5SY, 5SP, incorporated switch 5TL1, RCBO 5SU1 (without 5SU1…FP/FR), RCCB 5SV (for 5SU1, handle coupler 5ST3805-1 is required)
|g|auxiliary switch 2 NC for miniature circuit breakers 5SL, 5SY, 5SP, incorporated
switch 5TL1, RCBO 5SU1 (without 5SU1…FP/FR), RCCB 5SV (for 5SU1, handle
coupler 5ST3805-1 is required)
g|
|---|---|
|**Model**
~~a~~||
|**product brand name**
~~a~~|SENTRON
~~a~~|
|**product designation**|auxiliaryswitches|
|**design of theproduct**|Mountable|
|**design of theproduct factory mounted**|No|
|**electrical endurance(operating cycles) typical**|10 000|
|**Voltage**
~~a~~||
|insulation voltage rated value
~~a~~|440 V
~~a~~|
|surge voltage resistance rated value|4 kV|
|**Current**
~~re~~||
|**operational current at DC rated value**
~~re~~|0.01 A
~~re~~|
|**Supply voltage**
~~a~~||
|**supply voltage at DC rated value**
~~a~~|~~a~~|
|● minimum|12 V|
|**operating voltage**||
|● rated value|400 V|
|● at AC rated value minimum|12 V|
|● at DC rated value minimum|12 V|
|**protection class IP**
~~a~~|IP20
~~a~~|
|**Control current**
~~a~~||
|type of voltage of control voltage
~~a~~|AC/DC
~~a~~|
|**Product details**
~~a~~||
|**product component**
~~a~~|~~a~~|
|● auxiliaryswitch|Yes|
|**number of fault signal contacts**|0|
|**number of NC contacts**|2|
|**number of NO contacts**|0|
|**number of CO contacts**|0|
|**product extension can be mounted**|Universal|
|**product extension**
~~ee~~|auxiliaryswitch|
|**Connections**
~~ee~~||
|**connectable conductor cross-section**
~~ee~~||
|● minimum|0.5 mm²|
|● maximum|2.5 mm²|
|**AWG number as coded connectable conductor cross**
**section**||
|● minimum|24|
|● maximum|12|
5ST3012 Page 1/5
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6/1/2026
|**tightening torque with screw-type terminals**||||||||
|---|---|---|---|---|---|---|---|
|● maximum||0.5 N·m||||||
|**Mechanical Design**
~~a~~||||||||
|**height**||90 mm||||||
|**width**||9 mm||||||
|**depth**||70 mm||||||
|**number of modular width units**||1||||||
|**Net Weight**||63g||||||
|**Environmental conditions**
**standard**
IEC/EN60947-5-1; IEC/EN62019
~~a~~||||||||
|**ambient temperature during operation**||||||||
|● minimum||-25 °C||||||
|● maximum||55 °C||||||
|ambient temperature duringstorage minimum||-40 °C||||||
|**Approvals Certificates**
~~a~~||||||||
|**Environment**|||||**General Product Approval**|||
|Environmental Con-||||Environmental Con-||||
|firmations
firmations
~~ss~~
EPDs==—s—SCé~—MSK||||
|**General Product Ap-**
**proval**
**Maritime application**|||**other**|||||
|cA|m**e**
i|||Fee)|Confirmation
~~—~~|Miscellaneous
~~—~~||
**Railway** - Special Test Certific ate
~~P~~ **Further information** ~~s~~ **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=5ST3012 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/5ST3012 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5ST3012 **CAx-Online-Generator** https://www.siemens.com/cax **Tender specifications** https://www.siemens.com/specifications **Characteristic curves** https://curves.simaris.siemens.com/curves/
5ST3012 Page 2/5
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## Links
- [View this product on Novapart](https://novapart.co/products/5ST3012/auxiliary-current-switch-dpst-nc-5sl-5sy-5sp)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/5st3012/circuit-breaker-accessories/dp/3556497)
---
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