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Five ceramic cylindrical fuses, light body with metal end caps

Bussmann

Bussmann S501-3.15-R Ceramic Fuse 3.15A 1.5kA 250V AC 5 PK line protection

SKU CH-46M2-SN7F3

Pack of five fast-acting 3.15 A ceramic fuses rated 1.5 kA at 250 V AC for line protection

  • Fast-acting response clears faults quickly
  • Ceramic body withstands high temperatures
  • 5 kA interrupt rating at 250 V AC
  • 15 A rating protects sensitive circuits
  • Pack of five provides spare fuses

Circuit protection for 250 V AC lines

These ceramic fuses are rated at 3.15 A with an interrupt capacity of 1.5 kA at 250 V AC. They suit equipment that requires fast-acting, non-indicating overcurrent protection in a cylindrical 20 mm by 5 mm body. The pack contains five pieces for maintenance or installation spares. They carry CE, CSA and UL recognition for compliant builds.

Cool-running ceramic body under normal current

The ceramic tube dissipates heat effectively during typical operation at or below the 3.15 A rating. Fast-acting elements clear low-level faults quickly without sustained temperature rise. No forced airflow or special mounting is needed for standard line protection duties. The non-rejection design fits compatible HTB series fuse blocks directly.

Reliable interruption at 1.5 kA short-circuit level

When a severe fault occurs, the fuse interrupts up to 1.5 kA at 250 V AC without rupture of the ceramic body. The single-element construction ensures consistent clearing times during sustained overcurrent events. Performance remains stable across repeated duty cycles within the rated parameters. The 5-pack quantity supports immediate replacement after any fault event.

How it compares

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

Price $19.99
Cheaper than about 79% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How do I install the Bussmann S501-3.15-R fuse in an HTB fuse block and what step is often missed?

Insert the 20 mm cylindrical body into the HTB fuse block clips until fully seated; the step often missed is confirming the 250 V AC and 1.5 kA interrupt rating match the circuit requirements.

What maintenance or replacement will the Bussmann S501-3.15-R fuse need after it operates?

The fast-acting, single-element ceramic fuse is non-replaceable once it interrupts a fault; you must discard the open fuse and install a new 3.15 A unit from the 5-pack.

What limit appears first when the Bussmann S501-3.15-R fuse runs under sustained load?

The 3.15 A continuous current rating is the first limit; sustained current above this value will cause the fast-acting element to open and interrupt the circuit.

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