# Under Voltage Release, for 3VA1/3VA20/3VA25 Series Circuit Breaker

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![Product image](https://novapart.co/image/farnell:3474282/)

**URL**: https://novapart.co/products/3VA9908-0BB21/under-voltage-release-for-3va1-3va20-3va25-series
**SKU**: 3VA9908-0BB21
**Manufacturer**: SIEMENS
**Category**: Circuit Protection || Circuit Breakers || Circuit Breaker Accessories
**Price**: €118.1100
**Stock**: 10+

## Specifications

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

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3474282/)

**3VA9908-0BB21** 

**Data sheet** 

undervoltage release 48 V AC 50/60 Hz accessory for: 3VA1 and 3VA20-26 

|we<br>i<br>did)<br>seesHalpr|undervoltage release 48 V AC 50/60 Hz accessory for: 3VA1 and 3VA20-26|undervoltage release 48 V AC 50/60 Hz accessory for: 3VA1 and 3VA20-26|
|---|---|---|
|**Model**|||
|**product brand name**|SENTRON||
|**product designation**|Auxiliaryrelease||
|**accessories**|Auxiliaryrelease||
|**General technical data**|||
|**degree ofpollution**|3||
|**overvoltage category**|III||
|**apparent power consumption / maximum**|2 VA||
|**Voltage**|||
|surge voltage resistance|4 kV||
|**Mechanical Design**|||
|**height**|65 mm||
|**width**|25.7 mm||
|**number of slots**|3||
|**depth**|28.8 mm||
|**net weight**|91g||
|**Net Weight**|85g||
|**tightening torque / with screw-type terminals / minimum**|0.4 N·m||
|**tightening torque / with screw-type terminals / maximum**|0.5 N·m||
|**Connections according IEC**|||
|**stripped length**|10 mm||
|**connectable conductor cross-section**|||
|● minimum|0.5 ... 1.5||
|● maximum|||
|**AWG number / as coded connectable conductor cross**<br>**section / for auxiliary contacts**|||
|● minimum|20||
|● maximum|16||
|**Connetctions according UL**|||
|**stripped length[in]**|0.4 in||
|**tightening torque [lbf·in] / with screw-type terminals /**<br>**minimum**|3.5 lbf·in||
|**tightening torque [lbf·in] / with screw-type terminals /**<br>**maximum**|4.4 lbf·in||
|**Certificates**|||
|**General Product Approval**||**EMV**|



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© Copyright Siemens 

5/31/2026 

|Miscellaneous<br>Confirmation<br>~~~~~<br>EE||UKE|ce|&|
|---|---|---|---|---|
|**Test Certificates**<br>**Maritime application**|**other**|||**Environment**|
|Type Test Certific-<br>ates/Test Report<br>Miscellaneous<br>~~rs~~<br>kas|Miscellaneous<br>~~TO ~~||Confirmation<br>Environmental Con-<br>firmations<br> ~~TT~~||
|**Environment**|||||
|Environmental Con-|||||
|firmations|||||
|**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=3VA9908-0BB21|||||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**|||||
|https://support.industry.siemens.com/cs/ww/en/ps/3VA9908-0BB21|||||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)**|||||
|https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=3VA9908-0BB21|||||
|**CAx-Online-Generator**|||||
|https://www.siemens.com/cax|||||
|**Tender specifications**|||||
|https://www.siemens.com/specifications|||||



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## Links

- [View this product on Novapart](https://novapart.co/products/3VA9908-0BB21/under-voltage-release-for-3va1-3va20-3va25-series)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/3va9908-0bb21/circuit-breaker-accessories/dp/3474282)
---

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