On Board Fuse Box and Connexion Box

Fuse Box Range 750VDC - 1500VDC - 2000VDC

Fuse Box on the Roof 1500VDC

For more than 50 years, Mersen have been providing the market with safe, reliable and longer life time fuse boxes.These devices offer high performances and robustness for heavy duty requirements with very limited maintenance. Mersen offers one of the largest product ranges on the market and have a Fuse Box solution that will meet your unique needs. Our Fuse Box product line is rigorously engineered to meet your technical specifications and can see their dimensions be customised to your needs. They can be installed vertically or horizontally on the roof or on the bogie. They can include additional functions like Voltage or Current measurement system or relays for Voltage detection.



  • Single shape moulded box and cover which can be customised to your dimensions and have its number of entries and exits adapted
  • Fuse Boxes can host 1, 2 or 3 different circuits with separate or common entries and Exits
  • IEC or UL Standard
  • Voltage range 750VDC; 1500VDC; 2000VDC
  • Current range up to 3500A DC per box (6 fuses in parallel)
  • Box Configuration can include additional functions:
  • - Fuse micro switches (blown fuse indication) or window
  • - Voltage presence relay
  • - Energy Measurement (Volt, Amp, Watt)
  • Cable Connection by cable glands or protected by cover
  • Covers are equipped with captive screws
  • Upon request, Fuse Boxes can be coloured for purely cosmetic reasons
  • Resistance to strong mechanical impacts, rain, snow, wind, sun and detergents, as well as some vibration.
  • Polyester resin reinforced with 25% glass fiber, fire & smoke classification M1F1 under NF F 16 101/16 102, coated with GELCOAT, 300 to 400 µm thick, available in a variety of colors, fire & smoke classification M1F3 under NF F 16 101/16 102
  • or Sheet Moulding Compound (SMC): Polyester resin reinforced with 25% glass fiber, dyed in the mass, fire & smoke classification M1F2 under NF F 16 101/16 102
  • Can be mounted on U-shape rails with Micaver insulators or screwed onto moulded blind-hole inserts


  • Ampere Range (A) 400 - 3500 A
  • Standards IEC 61373 level 3
    M1F3 or M1F2 following NF F 16 101/16 102
    EN 45545
  • Application Power Converter or Circuit Breaker power supply protection
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Yes



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