Fuse Holders, Fuse Bases and Supports

Semiconductor & Special Purpose Fuse Bases & Accessories

U705 - IEC Cylindrical 14x51mm

Mersen Semiconductor fuse blocks feature open face styles. Each version is rated 750 volts and accommodates 14 x 51mm or 22 x 58mm IEC Cylindrical fuses. 703, U705 and U710 fuseholders feature Mersen's unique adder-block design which can be assembled onto 1, 2, or 3-pole fuseholders to form multi-pole segmented holders of as many poles as desired. A choice of box, screw, or pressure plate connectors is offered to fit a wide range of standard or solid copper wire. All versions have verified dielectric strength in excess of 2500V. A patented built-in DIN-rail adapter on the U710 blocks adds further design versatility. All fuse clips are made of high conductivity tin-plated copper with spring reinforced clips.



  • Thermoplastics bases
  • DIN-rail or screw Mount
  • Adder block design


  • Volts (VAC) 750 VAC
  • Volts (VDC) 750 VDC
  • Ampere Range (A) 0-50 A
  • Class IEC Cylindrical 14x51mm
  • Mounting Screw Mount Or DIN-rail
  • Connection Terminal Type Box
  • Body Material GFPC
  • Materials Contact Tin-plated Copper
  • SCCR 200kA (depending on fuse IR) kA
  • Wiring Range Al/Cu #2-14
  • Number of Poles Adder
  • Standards UL Recognized Component to standard 4248-1, File E52283
    CSA Certified, Class 6225, File 32169
  • Application All circuits up to 750 volts using semiconductor fuses for protection of small inverters, UPS systems, motor drives, etc.
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services
  • UL File Card E52283 IZLT2.E52283


  • U70505 - Y234184
  • U70506 - Z234185
  • U70507 - A234186
  • U70508 - B234187


  • CAD Drawings

    • Drawing U70505 :   PDF (32 KB)
    • Drawing U70506 :   PDF (33 KB) DXF (364 KB) STP (3.1 MB)
    • Drawing U70507 :   PDF (37 KB)
    • Drawing U70508 :   PDF (47 KB) DXF (2.1 MB) STP (10.4 MB)



Where to buy


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