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Five cylindrical glass fuses with metal end caps

Bussmann

Bussmann S500-400-R 400mA 250V 35A Glass Fuse 5 PK

SKU CH-W9S6-57W5D

Pack of five 400 mA 250 V AC fast-acting glass fuses with a 35 A interrupt rating

  • Fast-acting protection clears faults quickly
  • 400 mA rating at 250 V AC suits low-current circuits
  • 35 A interrupt rating handles short-circuit energy
  • Glass cylindrical body fits standard 20 mm × 5 mm holders
  • Pack of five provides ready spares for maintenance

Glass fuse pack for low-current circuits

This five-pack supplies 400 mA glass fuses rated for 250 V AC with a 35 A interrupt rating. They suit maintenance technicians and hobbyists protecting small power supplies, control boards or instrumentation where a fast-acting link is required. The cylindrical 20 mm by 5 mm body fits standard HTB fuse blocks and matches the Bussmann GDB, Littelfuse 217 and Mersen GSB cross-references.

Fast-acting response under continuous fault current

The single-element design opens quickly when current exceeds 400 mA, limiting energy let-through during a sustained overload rather than surviving a brief surge. A 35 A interrupt rating at 250 V AC means the fuse can clear a heavy short-circuit without rupturing the glass envelope. CE, CSA and UL JDYX2 certifications confirm the device meets recognised safety standards for continuous operation.

Glass body and cylindrical mounting

The transparent glass tube allows visual confirmation of element status after a fault, while the non-rejection cylindrical body slides into compatible HTB fuse blocks without a keying feature. Supplied as a pack of five, the fuses provide ready spares for field service kits or production line replenishment. No special tools are needed for replacement.

How it compares

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Price $12.99
Cheaper than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How much heat does the 400 mA glass fuse generate when it runs continuously in a 250 V AC circuit?

The fuse is rated for 400 mA at 250 V AC and carries that current without exceeding its design limits; power loss is the product of voltage drop and current, both defined by the fuse element.

What fuse holder or block series is required to accept the 20 mm by 5 mm cylindrical body?

The fuse fits compatible HTB series fuse blocks designed for 20 mm length and 5 mm diameter cylindrical fuses.

Will the fast-acting S500 fuse coordinate with older GDB or 217 series fuses already installed in the same panel?

The S500 is equivalent to Bussmann GDB and Littelfuse 217 series, so it shares the same fast-acting characteristic and 35 A interrupt rating at 250 V AC.

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