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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.

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Mersen A4J400


Mersen A4J Series Series

Ferraz Shawmut is Mersen. Mersen A4J Amp-Trap fast-acting fuses deliver excellent current-limiting protection to a wide variety of applications. Their unique dimensions prevent the substitution of other fuses with lower voltage ratings, interrupting ratings, or current-limiting capability.

Other Names: A4J400, A4J 400 Amp, A4J-400, A4J 400A, A4J400A, A4J-400A, A4J 400

Product specifications

Ampere 400 A
Voltage rating 600 Vac, 300 Vdc
Interrupt rating 200 kA
Speed Fast-Acting
Class Class J
Shape Cartridge Blade Fuses
Approvals UL, CSA, RoHS
Substitute parts Bussmann JKS, Littelfuse JLS
Datasheet Mersen A4J Datasheet
Dimensions 2.12" Dia x 7.13" L (53.85x181.1mm)
Item weight 1.75 lbs
Other names A4J400, A4J 400 Amp, A4J-400, A4J 400A, A4J400A, A4J-400A, A4J 400


WARNING: Cancer and Reproductive Harm

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