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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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Bussmann FNM-20


Bussmann FNM Series

Bussmann FNM supplemental fuses. Melamine tube construction with nickel-plated endcaps. Typical applications: circuits with high inrush currents and supplemental protection for inductive circuits up to 250Vac.

Other Names: FNM20, FNM 20 Amp, FNM-20, FNM 20A, FNM20A, FNM-20A, FNM 20

Product specifications

Ampere 20 A
Voltage rating 250 VAC
Interrupt rating 35 A at 250 VAC, 10 kA at 125 VAC
Speed Time Delay / Slow Blow
Class Midget Fuse
Shape Cartridge Fuses
Approvals CE, UL, CSA, RoHS
Substitute parts Littelfuse FLM, Mersen TRM
Datasheet Bussmann FNM Datasheet
Dimensions 0.41" Dia x 1.5" L (10.3x38.1mm)
Item weight 0.29 oz
Other names FNM20, FNM 20 Amp, FNM-20, FNM 20A, FNM20A, FNM-20A, FNM 20


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