Eaton Bussmann 663 Fuse Reducer – 1/8–30A to 60A Fuse Clips, 250/600V – Excellent Used Condition

This Eaton Bussmann 663 fuse reducer is in excellent used condition, fully functional and clean with only minor cosmetic wear.
The 663 is a non-rejection fuse reducer designed to allow very small fuses—anywhere from 1/8 amp up to 30 amps (Class H or Class K)—to be safely installed into 60 amp fuse clips.

This makes it perfect for lowering fuse ratings on existing equipment without replacing the fuse block or disconnect, improving protection coordination and allowing safer operation of sensitive circuits.

Key Specs & Features

• Model: 663 (also marked NO. 663)

• Type: Fuse reducer / fuse adapter

• Fuse Class: Class H / Class K

• Reduced Fuse Rating: 1/8 A to 30 A

• Fuse Clip Rating: Fits 60 A fuse clips

• Voltage Rating: 250V AC / 600V AC

• Construction: Plated metal reducer for solid electrical contact

• Certifications: UL Listed, CSA Certified

• Manufacturer: Eaton Bussmann

Condition: Excellent used condition – fully functional with only light cosmetic signs of previous use

Ideal for industrial panels, motor circuits, equipment retrofits, and maintenance operations where a 1/8A–30A fuse needs to be used in an existing 60A fuse block safely and to code.