3NH3420

**3NH3420** 

**Data sheet** 

LV HRC fuse base Sz. 3, 1-pole 630 A 690 V (1000 V) Double busbar terminal 

|**Model**||
|---|---|
|**product brand name**|SENTRON|
|**product designation**|LV HRC fuse system|
|**design of theproduct**|LV HRC fuse base|
|**design of the thread of the connection screw**|M12|
|**General technical data**||
|**number ofpoles**|1|
|**size of fuse system according to EN 60269-1**|NH3|
|**utilization category**|Without|
|**Supply voltage**||
|**supply voltage**||
|● at AC|690 V|
|● at DC|440 V|
|**Product details**||
|**product component swivel-in mechanism**|No|
|**maximum short-circuit current breaking capacity (Icu)**||
|● at AC rated value|120 kA|
|● at DC rated value|25 kA|
|**Connections**||
|**connectable conductor cross-section on box terminal**||
|● minimum|2.5 mm²|
|● maximum|50 mm²|
|**tightening torque of the screw for securing the equipment**|2.5 N·m|
|**maximum**||
|tighteningtorque with screw-type terminals maximum|38 N·m|
|**type of electrical connection**|with twin bar connection|
|● for main current circuit|flat connector|
|**Mechanical Design**||
|**height**|242 mm|
|**width**|49 mm|
|**depth**|101 mm|
|**fastening method**|fixed mounting|
|fasteningmethod bus-mounting|No|
|**Net Weight**|1.099 kg|
|**Approvals Certificates**||



Subject to change without notice © Copyright Siemens 

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6/4/2026 

|**Environment**|**General Product Approval**|||
|---|---|---|---|
|Environmental Con-<br>firmations<br>~~———~~<br>©<br>samens<br>EPD|Confirmation<br>~~——~~|Cf|UK<br>EA|
|**General Product Ap-**<br>**proval**<br>**Test Certificates**<br>**other**||||
|Miscellaneous<br>Special Test Certific-<br>Confirmation<br>~~OO~~||||
|ate||||
||QC PASS|||
|**Further information**<br>~~a~~||||
|**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=3NH3420||||
|**Service&Support (Manuals, Certificates, Characteristics, FAQs,...)**||||
|https://support.industry.siemens.com/cs/ww/en/ps/3NH3420||||
|**Image database (product images, 2D dimension drawings, 3D models, device circuit diagrams, ...)**||||
|https://www.automation.siemens.com/bilddb/cax_en.aspx?mlfb=3NH3420||||
|**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:** 4/3/2025 

Subject to change without notice © Copyright Siemens 

3NH3420 Page 2/3 

6/4/2026 

Subject to change without notice © Copyright Siemens 

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6/4/2026