Siemens Industry Online Support
Siemens AG
Entry ID: 109764946, Entry date: 09/22/2021

Switch disconnectors

  • Entry
Our switch disconnectors, switch disconnectors with fuses and fuse switch disconnectors offer you solutions for the safe disconnection of the main circuit in a range of applications.

-- Selected links to contact persons/Support, FAQs, certificates, etc. can be found below --  

Essential for safe isolation from the supply

Wherever safe isolation from low-voltage networks is required, the switch disconnectors, switch disconnectors with fuses and fuse switch disconnectors perform their tasks 24/7 with the utmost reliability – be it in industrial applications, infrastructure, or in buildings.


Switch disconnectors

  • 3LD
  • 3KD
  • 5TE
  • 3VA

Fuse switch disconnectors

  • 3NP1
  • 3NP5
  • 3NJ4

Switch disconnectors with fuses

  • 3KF
  • 3NJ62

SENTRON switching devices:

Electrical switching – safe, flexible, and productive

SENTRON switching devices


  • Selectivity Tool - with the Selectivity Manager, it is possible to determine and document project-specific selectivity limits online - conveniently, quickly and simply.


Application example

Technical Basic Information - Switch Disconnectors and Transfer Switching Equipment


Overview of all available configurators:

see --> Energy > SENTRON switching devices at



SIMARIS therm 2.5
More downloads in the Industry Online Support


Quick Selection Guide - Switch disconnectors and transfer switching equipment
Door mounted rotary operator
Flyer - Switch disconnectors and transfer switching equipment - End-to-end safety for users and systems
System Manual SENTRON 3NJ62 In-Line Plug-In Switch Disconnectors with Fuses
Configuration Manual – Switch Disconnectors
System Manual SENTRON 3NP1 Fuse Switch Disconnector
Configuration Manual - Fuse Systems
SENTRON Switch disconnectors 3KD Switch-disconnector



Product notes

Product notes in the Industry Online Support

Service & Support

Assistance with technical queries is provided at

Information in the Industry Online Support

You can find your local contact at

Contact database

Our product specialists are available to answer your technical queries at

Support request



General product approval
Environmental certification
More certificates in the Industry Online Support

CAD/CAE data 

Engineering data for CAD or CAE systems is available in the CAx Download Manager at


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