We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Five small cylindrical ceramic fuses with metal end caps

Bussmann

Bussmann S501-50-R Ceramic Fuse 50mA 250V AC 1.5kA 5 PK line protection

SKU CH-FY19-66W1T

A pack of five fast-acting ceramic fuses rated 50 mA at 250 V AC with a 1.5 kA interrupt rating for line protection

  • Fast-acting protection clears faults quickly
  • 5 kA interrupt rating handles high fault currents
  • Ceramic body withstands thermal stress
  • 20 mm × 5 mm size fits standard holders
  • Pack of five supports multiple installations

Fuse Specifications

The Bussmann S501-50-R is a ceramic fuse rated at 50 mA and 250 V AC with a breaking capacity of 1.5 kA. It belongs to the S501 series and features a fast-acting, non-indicating design with a cylindrical ceramic body measuring 20 mm in length and 5 mm in diameter. The pack contains five fuses suitable for line protection applications.

Suitable Use Cases

These fuses suit technicians and engineers who need fast-acting overcurrent protection for low-current circuits up to 50 mA. They are not intended for buyers who require a visual indication that the fuse has operated, nor for circuits exceeding the 250 V AC rating or the 1.5 kA interrupt rating. Installers needing a rejection-style fuse or a different body material should look at alternative series.

Critical Rating

The interrupt rating of 1.5 kA at 250 V AC is the single specification that decides whether this fuse will safely clear a fault in your circuit. Verify that the prospective short-circuit current at the installation point does not exceed this value before fitting the fuse. The fuse also carries CE, CSA and UL Guide JDYX2 certifications for compliance assurance.

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 much heat does a 50 mA ceramic fuse generate when it carries full load all day?

A 50 mA fuse at 250 V AC dissipates only a few milliwatts, so it adds negligible heat inside the enclosure.

What fuse holder or block series is required for the 20 mm × 5 mm cylindrical body?

The compatible series is HTB, which accepts the 20 mm length and 5 mm diameter ceramic cartridge.

Can these fast-acting S501 fuses replace older GDA or 216 series fuses in the same equipment?

Yes, they are listed as equivalent to Bussmann GDA, Littelfuse 216 and Mersen GSD series for direct substitution.

More in Breakers & Circuit Protection

Similar items