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Five small cylindrical ceramic fuses with silver end caps

Bussmann

Bussmann S501-500-R Ceramic Fuse 500mA 250V AC 1.5kA 5 PK

SKU CH-37XV-RD6JS

A pack of five fast-acting 500 mA ceramic fuses rated 250 V AC with a 1.5 kA interrupt rating and 20 mm length

  • Fast-acting response clears faults quickly
  • 500 mA rating protects sensitive low-current circuits
  • Ceramic body withstands high interrupt energy
  • 5 kA interrupt rating at 250 V AC
  • Pack of five gives ready spares

Circuit protection for low-current mains circuits

This pack contains five Bussmann S501 series ceramic fuses rated at 500 mA and 250 V AC. They suit equipment designers and maintenance engineers who need fast-acting, non-indicating over-current protection for instrumentation or control circuits. Each fuse has a 1.5 kA interrupting rating at the rated voltage.

Suited to designs specifying 20 mm x 5 mm

The 20 mm length and 5 mm diameter match the standard GDA/216 footprint, so they fit HTB-series fuse blocks and similar holders. Buyers who need visual indication of a blown element, a time-delay characteristic, or a higher interrupting capacity should look at other series. The non-rejection body also means the fuse will not prevent insertion of an incorrect rating.

Interrupt rating of 1.5 kA at 250 V AC

This single figure defines whether the fuse can safely clear a fault on the intended supply. If the prospective short-circuit current at the installation point exceeds 1.5 kA, a fuse with a higher breaking capacity must be selected instead.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 87% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How is the 20 mm × 5 mm ceramic fuse installed in a holder?

Slide the cylindrical body into a compatible HTB series fuse block until the metal end caps seat firmly in the clips; the step often missed is verifying the holder is rated for 250 V AC and 1.5 kA interrupt capacity.

What maintenance or replacement will the 500 mA fast-acting fuse need later?

The fuse is single-element and non-indicating, so it cannot be reset; after any over-current event it must be replaced with another 500 mA 250 V AC ceramic fuse of the same 1.5 kA rating.

What limit appears first when the fuse runs continuously near 500 mA?

The fuse will open once sustained current exceeds its 500 mA rating; the 1.5 kA interrupt rating at 250 V AC defines the maximum fault current it can safely break.

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