High Speed & Semiconductor Fuses

34 parts

High speed and semiconductor fuses from Mersen cover ratings from 10 A to 2000 A. The range holds over 170 products, mainly Protistor aR square body links and round body DC fuses for drives, rectifiers and power converters. Stoklink ships worldwide from Turkey on EXW terms, and quotes for project volumes are available on request.

Related families
PV, DC & Battery FusesMedium Voltage FusesFuse Holders, Bases & RailsFuse Switch Disconnectors

34 parts

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Guide

High Speed & Semiconductor Fuses buying guide

What's in this range

  • Protistor SC series square body aR fuses in sizes 30, 31, 32 and 33, 550 to 690 VAC IEC.
  • Protistor links with striker microswitch or visual indicator options.
  • D70QS and D100QS round body aR fuses for 700 VDC and 1000 VDC circuits.
  • Amp-Trap A60X fuses at 600 VAC.
  • Protistor links for 2000 VDC systems.

How to choose

  • Class aR: partial-range fuses clear short circuits and need separate overload protection.
  • I2t let-through: the fuse I2t must stay below the withstand value of the thyristor or diode.
  • Voltage: check both the AC rating and the DC rating, since DC values are lower for the same body.
  • Current: derate for ambient temperature, cooling and harmonic load current.
  • Fixing and indication: flush ends with metric or UNC threads, plus indicator or microswitch for monitoring.
FAQ

High Speed & Semiconductor Fuses questions

Why use aR fuses for semiconductors?

Semiconductors tolerate very little energy during a fault. aR fuses have a low let-through I2t, so they open before the device is damaged.

Do semiconductor fuses protect against overload?

Not on their own. aR is a partial-range class, so add an overload device such as a relay or breaker.

Are these fuses in stock?

Availability varies by item, so request a quote. Stoklink ships worldwide from Turkey on EXW terms.

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