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Five cylindrical glass fuses with metal end caps, 20 mm long and 5 mm diameter

Bussmann

Bussmann S506-315-R Glass Fuse 315mA 250V AC 35A 5 Pack

SKU CH-ESCV-83CQ0

Glass time-delay fuse rated 315 mA at 250 V AC with a 35 A interrupt rating, 20 mm × 5 mm cylindrical body, pack of five

  • Reliable overload protection with 35 A interrupt rating at 250 V AC
  • Precise 315 mA current rating safeguards sensitive circuits
  • Time-delay characteristic tolerates brief inrush without nuisance blowing
  • Compact 20 mm × 5 mm glass body fits standard fuse holders
  • cURus, IMQ and MITI/JET 1641-31003-1005 compliance confirms safety approval

Bussmann S506-315-R Glass Fuse 5 Pack

The Bussmann S506-315-R is a cylindrical glass fuse rated at 315mA and 250V AC with a 35A interrupt rating. It suits technicians and hobbyists needing time-delay protection for low-current circuits in equipment such as power supplies or control panels. The pack contains five identical fuses for spares or multi-point replacement.

Installation and common issues

Each fuse measures 20mm long by 5mm diameter and fits standard 5x20mm fuse holders or compatible HTB series blocks. Installation requires no tools beyond opening the holder and seating the fuse. The glass body allows visual inspection of the element. Common issues include using a fast-acting fuse where time-delay is required, causing nuisance blows, or exceeding the 250V AC rating.

Pre-order checks

Verify that your equipment specifies a 315mA time-delay fuse at 250V AC and accepts a 5x20mm cylindrical body. Confirm the holder is non-rejection type and rated for at least the available fault current. Cross-reference the S506 series with equivalents such as GDC, 218 or GDG if the service manual lists those designations. Ensure the application does not demand a higher interrupt rating than 35A.

How it compares

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

Price $20.99
Cheaper than about 78% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How do I confirm the fuse is working correctly after installation?

The circuit should remain powered under normal load; if the fuse opens, the glass body will show a visible break in the internal element, indicating it has interrupted a fault current up to 35A at 250V AC.

What comes in the pack and is any accessory required for mounting?

The pack contains five 20mm x 5mm cylindrical glass fuses rated 315mA, 250V AC, time-delay, non-rejection type; they fit compatible HTB series fuse blocks, which are sold separately.

Which version should I choose if I need a direct replacement for a Bussmann GDC or Littelfuse 218 fuse?

This S506-315-R is the direct equivalent to Bussmann GDC, Bussmann S506, Littelfuse 218 and Mersen GDG series fuses with the same 315mA, 250V AC, 35A interrupt rating.

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