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Five cylindrical glass fuses with metal end caps

Bussmann

Bussmann S500-50-R Glass Fuse 50mA 250V AC 35A 5 PK line protection

SKU CH-RRHE-PV2V2

Glass fast-acting fuse rated 50 mA at 250 V AC with a 35 A interrupt rating, 20 mm by 5 mm, pack of five

  • Fast-acting protection clears faults quickly
  • 35 A interrupt rating at 250 V AC handles high fault currents
  • 20 mm × 5 mm glass body fits standard fuse blocks
  • UL Guide JDYX2 and CSA certified for safety compliance
  • Pack of five fuses keeps spares on hand

Fuse Specifications

The Bussmann S500-50-R is a 50 mA glass fuse rated for 250 V AC with a 35 A interrupt rating. It belongs to the S500 series and uses a fast-acting, single-element design. The cylindrical body measures 20 mm in length and 5 mm in diameter. Each pack contains five fuses for circuit protection.

Capacity and Headroom

This fuse handles continuous loads up to 50 mA at 250 V AC. The 35 A interrupt rating provides headroom for fault conditions within that limit. It runs out when current exceeds the rated value, opening the circuit to protect downstream components. The fast-acting element responds quickly to overcurrent events.

Build Integration

The 5 mm by 20 mm glass body fits compatible HTB series fuse blocks and other holders accepting this size. It is a non-rejection type, so it installs without keyed features. Equivalent series include Bussmann GDB, Littelfuse 217 and Mersen GSB for cross-referencing. Certifications include CE, CSA and UL Guide JDYX2.

How it compares

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

Price $16.99
Cheaper than about 83% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

Will this 50 mA glass fuse fit the 20 mm fuse blocks I already use?

Yes, the fuse body is 20 mm long and 5 mm in diameter, matching standard 20 mm fuse blocks.

How can I verify the fuse is still good after installing it?

Check continuity with a multimeter; a fast-acting fuse should show near-zero resistance when intact.

What comes in the pack and do I need a separate holder?

The pack contains five S500 series glass fuses; a compatible fuse block such as the HTB series must be purchased separately.

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