# Current Transformer, 600 A, 3NJ6 Series Switch Disconnectors

![Product image](https://novapart.co/image/farnell:3480903/)

**URL**: https://novapart.co/products/3NJ6940-3BL21/current-transformer-600-a-3nj6-series-switch
**SKU**: 3NJ6940-3BL21
**Manufacturer**: SIEMENS
**Category**: Automation & Process Control || Industrial Switches & Control Stations || Industrial Switch Accessories
**Price**: €50.2900
**Stock**: 10+

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:3480903/)

**3NJ6940-3BL21** 

**Data sheet** 

accessory for Switch disconnector with fuses In-line design, pluggable current transformer 600/5 A, Cl. 1, 5 VA 

|**Model**||||||
|---|---|---|---|---|---|
|**product brand name**|||SENTRON|||
|**product designation**|||Current transformer|||
|**design of theproduct**|||accessoryfor switch disconnector with fuses 3NJ6|for switch disconnector with fuses 3NJ6||
|**productquality calibrated**|||No|||
|**operating voltage**|||0.72 kV|||
|insulation voltage rated value|||3 kV|||
|**designation of overcurrent limiting factor**|||FS 5|||
|**current**||||||
|● at input rated value|||600 A|||
|● at output rated value|||5 A|||
|**accuracy class of the current transformer**|||class 1|||
|**value range of the operating frequency**|||50/60 Hz|||
|**Protection class**||||||
|**protection class IP**|||IP20|||
|**suitability for use for outside use**|||No|||
|**suitability for use for interior use**|||Yes|||
|**Connections**||||||
|type of electrical connection at output|||screw-type terminals|||
|**Mechanical Design**||||||
|**height**|||88.5 mm|||
|**width**|||70 mm|||
|**depth**|||58 mm|||
|**fastening method**|||mounting|||
|**diameter of inlet opening**|||32 mm|||
|**outer diameter of thepush-through conductor maximum**|||32 mm|||
|**Net Weight**|||0.31 kg|||
|**Environmental conditions**||||||
|**ambient temperature during operation**||||||
|● minimum|||-10 °C|||
|● maximum|||55 °C|||
|**Approvals Certificates**||||||
|**Environment**<br>**General Product Approval**|||||**EMV**|
|Environmental Con-<br>firmations<br>[H[|Confirmation||cs<br>EG-Konf,|CA|&S|



Subject to change without notice © Copyright Siemens 

3NJ69403BL21 Page 1/3 

6/4/2026 

**Test Certificates** 

**Test Certificates other** Type Test CertificConfirmation ~~—_—~~ ates/Test Report ~~——~~ 

~~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=3NJ6940-3BL21 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3NJ6940-3BL21 **Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=3NJ6940-3BL21 **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> 

**last modified:** 

6/13/2025 

Subject to change without notice © Copyright Siemens 

3NJ69403BL21 Page 2/3 

6/4/2026 

Subject to change without notice © Copyright Siemens 

3NJ69403BL21 Page 3/3 

6/4/2026 



## Links

- [View this product on Novapart](https://novapart.co/products/3NJ6940-3BL21/current-transformer-600-a-3nj6-series-switch)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/siemens/3nj6940-3bl21/control-gear-switch-gear/dp/3480903)
---

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