Free standard shipping for all US orders!


Glass fuses have a low breaking capacity. It's easy to see when they're blown: the glass will be discolored and the filament broken. Replace yours today!

Ceramic fuses are high or low breaking capacity and can be used in many applications. Ceramic color can vary from a very light beige to dark gray.

This section doesn’t currently include any content. Add content to this section using the sidebar.

Image caption appears here

Add your deal, information or promotional text

Mersen A50QS90-4


Mersen A50QS Series Series

Ferraz Shawmut is Mersen. Mersen A50QS Amp-Trap Form 101 fuses grew out of the need to improve the overall performance of semiconductor fuses in response to new equipment requirements. The A50QS encompasses the best protection features – lower I2t to provide better protection for equipment, longer life when subjected to cyclic loading and lower watts loss.

Other Names: A50QS90, A50QS 90 Amp, A50QS 90A, A50QS-90-4, A50QS-90

Product specifications

Ampere 90 A
Voltage rating 500 Vac, 500 Vdc
Interrupt rating 50 kA
Speed High Speed
Class Semiconductor
Shape Cartridge Blade Fuses
Approvals UL, CSA, RoHS
Substitute parts Bussmann FWH
Datasheet Mersen A50QS Datasheet
Dimensions 1" Dia x 3.63" L (25.4x92.2mm)
Item weight 4 oz
Other names A50QS90, A50QS 90 Amp, A50QS 90A, A50QS-90-4, A50QS-90


WARNING: Cancer and Reproductive Harm

TheFuseShop is not an authorized distributor of Bussmann, Eaton, Littelfuse, Mersen, or Ferraz Shawmut products.