Overview
The Bussmann No. 616 Class H fuse reducer is a non-indicating adapter designed to accommodate smaller Class H and K fuses in equipment rated for 100A operation at 600V. This pair of reducers installs on fuse ferrules or blades to permit the application of smaller fuse sizes (35–60A) than those for which the fuse blocks or holders are originally designed. Commonly used in electrical panels, disconnect switches, and motor control centers, the No. 616 maintains both mechanical and electrical contact integrity while reducing the arc rating in the circuit.
Key Features
- Compatible with Class H and Class K fuses (NOS/RES fuse types)
- Rated for 35–60A fuses in 100A fuse blocks
- Non-rejecting design fits most panel and switch configurations, including dead-front types
- Strong mechanical and electrical contact for reliable performance
- Sold as a pair (quantity: 2)
Technical Specifications
- Fuse Class: H, K
- Voltage Rating: 600V AC
- Fuse Amperage Range: 35–60A
- Fuse Block/Equipment Rating: 100A
- Rejection Type: Non-rejecting
- Material: Copper
- Standards Compliance: UL Listed (E12853), CSA Certified (CLR47235)
- Quantity: Pair (2 units)
Typical Applications
- Industrial control panels and motor control centers
- Electrical distribution equipment with oversized fuse blocks
- Machine tool circuits and branch circuit protection
- Equipment upgrades where smaller fuses are required for load reduction
- Retrofit installations in existing panels and disconnect switches
Compatibility & Replacements
Compatible With
- Bussmann Class H and K fuses (NOS and RES types)
- 100A-rated fuse blocks and disconnect switches
- Industrial control panels and electrical cabinets
- Standard fuse clips and ferrule holders
Replaces / Drop-In Replacement For
- Original Bussmann No. 616 units
- Equivalent Class H fuse reducers from Eaton/Bussmann for 100A-to-60A applications
- Cooper Bussmann No. 616 (legacy designation)
Works With
- Bussmann NOS/RES fuse families (600V Class H and K)
- IEC 60269 fuse standards (UL and CSA certified)
- Non-rejecting fuse block designs in dead-front and open-front equipment
- Any 100A fuse holder designed for Class H or K fuses
