• Siemens SENTRON 3NJ4 In-Line Fuse Switch Disconnectors (63–2000 A)
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Siemens SENTRON 3NJ4 In-Line Fuse Switch Disconnectors (63–2000 A)

Siemens SENTRON 3NJ4 In-Line Fuse Switch Disconnectors (63–2000 A)

Siemens SENTRON 3NJ4 in-line fuse switch disconnectors for 100 and 185 mm busbar systems, NH000 to NH4a, 63 to 2000 A.

Key features

  • Sizes NH00/NH000, NH1, NH2, NH3 and NH4a; 690 V and 800 V versions
  • 1-pole or 3-pole switchable versions
  • Versions for integratable current transformers and with electronic fuse monitoring EFM
  • NH3 400 V versions up to 2000 A for transformer secondary fusing / incoming blocks
  • Flat, stud, V and box terminals; fixing screws ordered separately

Specifications

Brand Siemens SENTRON
Series 3NJ4
Catalog chapter 8 Switch Disconnectors
Product group Fuse switch disconnectors
Design In-line, for busbar mounting
Fuse links LV HRC acc. to IEC 60269-2
Note Fixing screws ordered separately
Source Siemens Catalog LV 10 · 2026, p. 724-724
3NJ4103-3BF02 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4103-3BR02 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: F70 box terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4101-3BF01 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4103-3BF01 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4121-3BF01 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4123-3BF01 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4123-3BJ01 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4123-3BT01 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4131-3BF01 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4133-3BF01 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4133-3BJ01 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4133-3BT01 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4141-3BF01 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4143-3BF01 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4143-3BJ01 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4143-3BT01 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ5643-0BB00 Rated current Ie: 1250 A | Fuse size: NH4a | Busbar spacing: 185 mm | Connection: M16 × 60 stud terminal | Switching: 1-pole switchable | Version: 690 V, NH4a
3NJ4103-3BF12 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4121-3BF11 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4123-3BF11 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4131-3BF11 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4133-3BF11 Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4141-3BF11 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4143-3BF11 Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4103-3CF02 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4123-3CF01 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4133-3CF01 Rated current Ie: 400 A | Fuse size: NH2/NH1 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4143-3CF01 Rated current Ie: 630 A | Fuse size: NH3/NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4103-3CF12 Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4123-3CF11 Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4133-3CF11 Rated current Ie: 400 A | Fuse size: NH2/NH1 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4143-3CF11 Rated current Ie: 630 A | Fuse size: NH3/NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4153-3BF01 Rated current Ie: 1000 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 2 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4183-3BF01 Rated current Ie: 1250 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 2 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4163-3BF01 Rated current Ie: 1600 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 3 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4173-3BF01 Rated current Ie: 2000 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 4 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4103-3DF02 Rated current Ie: 63 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4103-3DF01 Rated current Ie: 63 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4123-3DF01 Rated current Ie: 160 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4143-3DF01 Rated current Ie: 315 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 800 V
Switch DisconnectorsSiemens
40 product codes available in this family
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Siemens SENTRON 3NJ4 In-Line Fuse Switch Disconnectors (63–2000 A)

Brand Siemens·Switch Disconnectors

Available part numbers (40)

3NJ4103-3BF02, 3NJ4103-3BR02, 3NJ4101-3BF01, 3NJ4103-3BF01, 3NJ4121-3BF01, 3NJ4123-3BF01, 3NJ4123-3BJ01, 3NJ4123-3BT01, 3NJ4131-3BF01, 3NJ4133-3BF01 + 30 more — see full table ↓

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Product codeSpec
3NJ4103-3BF02Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4103-3BR02Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: F70 box terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4101-3BF01Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4103-3BF01Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4121-3BF01Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4123-3BF01Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4123-3BJ01Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4123-3BT01Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4131-3BF01Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4133-3BF01Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4133-3BJ01Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4133-3BT01Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4141-3BF01Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, standard
3NJ4143-3BF01Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4143-3BJ01Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 stud terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ4143-3BT01Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: V terminal | Switching: 3-pole switchable | Version: 690 V, standard
3NJ5643-0BB00Rated current Ie: 1250 A | Fuse size: NH4a | Busbar spacing: 185 mm | Connection: M16 × 60 stud terminal | Switching: 1-pole switchable | Version: 690 V, NH4a
3NJ4103-3BF12Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4121-3BF11Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4123-3BF11Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4131-3BF11Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4133-3BF11Rated current Ie: 400 A | Fuse size: NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4141-3BF11Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 1-pole switchable | Version: 690 V, for integratable CTs
3NJ4143-3BF11Rated current Ie: 630 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, for integratable CTs
3NJ4103-3CF02Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4123-3CF01Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4133-3CF01Rated current Ie: 400 A | Fuse size: NH2/NH1 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4143-3CF01Rated current Ie: 630 A | Fuse size: NH3/NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, with EFM
3NJ4103-3CF12Rated current Ie: 160 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4123-3CF11Rated current Ie: 250 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4133-3CF11Rated current Ie: 400 A | Fuse size: NH2/NH1 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4143-3CF11Rated current Ie: 630 A | Fuse size: NH3/NH2 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 690 V, CT-ready, with EFM
3NJ4153-3BF01Rated current Ie: 1000 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 2 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4183-3BF01Rated current Ie: 1250 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 2 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4163-3BF01Rated current Ie: 1600 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 3 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4173-3BF01Rated current Ie: 2000 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: 4 × M12 flat terminal | Switching: 3-pole switchable | Version: 400 V, transformer secondary fusing
3NJ4103-3DF02Rated current Ie: 63 A | Fuse size: NH00/NH000 | Busbar spacing: 100 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4103-3DF01Rated current Ie: 63 A | Fuse size: NH00/NH000 | Busbar spacing: 185 mm | Connection: M8 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4123-3DF01Rated current Ie: 160 A | Fuse size: NH1 | Busbar spacing: 185 mm | Connection: M10 flat terminal | Switching: 3-pole switchable | Version: 800 V
3NJ4143-3DF01Rated current Ie: 315 A | Fuse size: NH3 | Busbar spacing: 185 mm | Connection: M12 flat terminal | Switching: 3-pole switchable | Version: 800 V

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