Product Offering

5 x 20mm Cartridge Fuse

5 x 20mm Cartridge Fuse
Data Sheets »

The 5 x 20mm cartridge fuse is a miniature fuse having a diameter of 5mm and a length of 20mm. This form factor is the most commonly used version worldwide. The 5 x 20mm fuse is constructed with either a glass body or a ceramic body which can tolerate higher temperatures and offers a higher interrupting rating and voltage rating. Ratings are typically provided at both 125 volts AC and 250 volts AC. Fuses with voltage ratings up to 500 volts are also available. Both of these fuse types are offered in fast acting, time lag or time delay versions and can be ordered with or without axial leads. They are typically bulit in accordance with UL 248-14 and CSA C22.2/No. 248.14 or IEC 60127-2 standards. The IEC 60127-2 series are offered in several versions:


IEC DesignationTypeOpening SpeedBreaking Capacity
IEC 127-2, Sheet IType FQuick ActingHigh
IEC 127-2, Sheet IIType FQuick ActingLow
IEC 127-2, Sheet III Type T Time LagLow
IEC 127-2, Sheet VType TTime Lag High
IEC 127-2, Sheet VI Type T Time LagEnhanced


Littelfuse, Bussmann and Schurter offer 5 x 20mm fuses.