3NJ6930-3BG21

**3NJ6930-3BG21** 

**Data sheet** 

accessory for Switch disconnector with fuses In-line design, pluggable current transformer 250/5 A, Cl. 1, 2.5 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|||250 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**|||65 mm|||
|**width**|||44 mm|||
|**depth**|||30 mm|||
|**fastening method**|||mounting|||
|**diameter of inlet opening**|||21 mm|||
|**outer diameter of thepush-through conductor maximum**|||21 mm|||
|**Net Weight**|||0.184g|||
|**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|



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6/2/2026 

**Test Certificates** 

|**Test Certificates**|**other**|
|---|---|
|Type Test Certific-<br>ates/Test Report<br>~~—_—~~|Confirmation<br>~~——~~|



~~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=3NJ6930-3BG21 **Service&Support (Manuals, Certificates, Characteristics, FAQs,...)** https://support.industry.siemens.com/cs/ww/en/ps/3NJ6930-3BG21 

**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)** https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=3NJ6930-3BG21 

**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 

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Subject to change without notice © Copyright Siemens 

6/2/2026 

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Subject to change without notice © Copyright Siemens 

6/2/2026