Cooper Bussmann No. 663-R Class R fuse reducers designed to allow smaller amperage fuses to fit larger fuse clips. This set is rated for 1/10–30 amp fuses used with 60 ampere clips at up to 600 volts.

Includes one pair of Bussmann 663-R fuse reducers in the original box. The reducers show storage/handling marks consistent with older stock, and the original packaging shows shelf wear and writing.

Condition
New – Open box

Specifications

• Brand: Cooper Bussmann
• Manufacturer: Cooper Industries / Bussmann
• Model / Part Number: 663-R
• Product Type: Fuse Reducers
• Fuse Class: Class R
• Fuse Size: 1/10–30 Amp
• Fits Clip Size: 60 Amp
• Voltage Rating: 600V
• Quantity: 1 Pair
• UL Listed: Yes
• Marking: 398P Fuse Reducer

Compatibility

• Designed for 1/10–30 amp, 600V Class R fuses used in 60 ampere fuse clips
• Box references Buss Fusetron, Low-Peak, Limitron, and other Class R fuses
• Verify application requirements before purchase

Features

• Converts 60 amp fuse clips for use with smaller 1/10–30 amp Class R fuses
• Rated for applications up to 600 volts
• Original Cooper Bussmann packaging
• Includes one matched pair of reducers
• Industrial electrical replacement component

Shipping
Carefully packaged
Tracking uploaded promptly
Smoke-free storage environment
Combined shipping available when applicable

Notes
Original box shows age-related shelf wear, discoloration, and handwritten markings. Reducers may show minor cosmetic storage marks from long-term storage.

Photos are representative. Serial numbers and packaging may vary. Item will be identical model and condition.