Image not available
Illustrative purposes only
5ST3021-2
Fault Signal Contact, DPST-NO, 5SL, 5SY, 5SP Series MCB, 5SU1 Series RCBO & FI 5SV Series MCCB
⚠️ 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: Circuit Breaker Accessories
- Product Range: SENTRON Series
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 37.13 € |
| Current stock | 10+ |
| Lead time | 30 days |
**5ST3021-2** **Data sheet** fault signal contact with test button 2 NO for miniature circuit breakers 5SL, 5SY, 5SP RCBO 5SU1, RCCB 5SV (required for 5SU1 handle coupler 5ST3805-1) |**Model**|| |---|---| |**product brand name**|SENTRON| |**product designation**|Fault signal contact| |**design of theproduct**|Mountable| |**design of theproduct factory mounted**|No| |**electrical endurance(operating cycles) typical**|10 000| |**Voltage**|| |insulation voltage rated value|440 V| |**Current**|| |**operational current at DC rated value**|0.05 A| |**Supply voltage**|| |**operating voltage**|| |● at AC rated value minimum|24 V| |● at DC rated value minimum|24 V| |**protection class IP**|IP20| |**Control current**|| |type of voltage of control voltage|AC/DC| |**Product details**|| |**product component**|| |**● fault signal contact**|Yes| |● auxiliaryswitch|No| |**number of fault signal contacts**|0| |**number of NC contacts**|0| |**number of NO contacts**|2| |**number of CO contacts**|0| |**product extension can be mounted**|Universal| |**product extension**|Fault signal contact| |**Connections**|| |**connectable conductor cross-section**|| |● minimum|0.5 mm²| |● maximum|2.5 mm²| |**AWG number as coded connectable conductor cross**|| |**section**|| |● minimum|24| |● maximum|12| |**tightening torque with screw-type terminals**|| |● maximum|1 N·m| |**Mechanical Design**|| 5ST30212 Page 1/5 Subject to change without notice © Copyright Siemens 6/3/2026 |**height**||90 mm|90 mm|||| |---|---|---|---|---|---|---| |**width**||9 mm||||| |**depth**||70 mm||||| |**number of modular width units**<br>1<br>~~OS~~||||||| |**Net Weight**||71g||||| |**Environmental conditions**||||||| |**standard**||IEC/EN60947-5-1; IEC/EN62019; GB14048.5||||| |**ambient temperature during operation**<br>● minimum<br>● maximum<br>ambient temperature duringstorage minimum<br>~~CS~~||-25 °C<br>55 °C<br>-40 °C||||| |**Approvals Certificates**||||||| |**Environment**||||**General Product Approval**||| |Environmental Con-<br>firmations<br>Environmental Con-<br>firmations<br>~~_~~<br>~~—_~~|EPD||Miscellaneous<br> P~~D~~|||EAL| |**General Product Approval**|||**other**|||**Railway**| |Confirmation<br>~~—~~<br>Ce|es||||Confirmation<br>~~a~~|Special Test Certific-<br>ate| |**Further information**<br>~~ee~~||||||| |**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=5ST3021-2||||||| |**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**||||||| |https://support.industry.siemens.com/cs/ww/en/ps/5ST3021-2||||||| |**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)**||||||| |https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=5ST3021-2||||||| |**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>||||||| 5ST30212 Page 2/5 Subject to change without notice © Copyright Siemens 6/3/2026 **==> picture [511 x 730] intentionally omitted <==** **----- Start of picture text -----**<br> -K<br>13 23<br>14 24<br>**----- End of picture text -----**<br> 5ST30212 Page 3/5 Subject to change without notice © Copyright Siemens 6/3/2026 **==> picture [456 x 340] intentionally omitted <==** **----- Start of picture text -----**<br> 13 14<br>23 24<br>last modified: 5/5/2026 G<br>**----- End of picture text -----**<br> 5ST30212 Page 4/5 Subject to change without notice © Copyright Siemens 6/3/2026 5ST30212 Page 5/5 Subject to change without notice © Copyright Siemens 6/3/2026
Updated at June 7, 2026
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →