Overview
The Bussmann NO.216-R is a Class R fuse reducer designed to allow lower-rated Class R ferrule and blade fuses to fit into standard 100-ampere fuse blocks and panel cutouts. This rejection-type reducer maintains electrical and mechanical integrity while preventing mismatches between fuse ratings and equipment ratings.
Key Features
- Accepts up to 30A fuses at 600V or 35–60A fuses at 250V
- Reduces fuses to fit 100A fuse blocks and switchgear
- Class R specification with strong electrical and mechanical contact
- Non-indicating design for reliable performance
- Sold as 1 pair of reducers per unit
- UL and CSA certified for safety compliance
Technical Specifications
The 216-R is suitable for use with FRN-R, LPN-RK, FRS-R, LPS-RK, KTN-R, and KTS-R series Class R fuses. Mechanical and electrical contact is maintained reliably in most panel types including dead-front configurations. The short-circuit current rating (SCCR) matches the fuse interrupting rating, ensuring fault protection up to the fuse’s capability.
Typical Applications
- Commercial and industrial electrical panels requiring Class R fuse compatibility
- Switchgear and distribution equipment downsizing
- Retrofit installations where existing fuse blocks exceed load requirements
- Facilities requiring safety-rated fuse reducers for code compliance
Compatibility & Replacements
Compatible With
- Class R ferrule and blade fuses (FRN-R, FRS-R series)
- Class R cartridge fuses (LPN-RK, LPS-RK, KTN-R, KTS-R)
- 100-ampere fuse blocks and panelboards
- Standard dead-front electrical switchgear
Replaces / Drop-In Replacement For
The NO.216-R directly replaces other Bussmann Class R reducers with identical electrical and mechanical specifications. Verify part compatibility with your system integrator before ordering.
Works With
- Bussmann Class R fuse series (complete line)
- Eaton electrical distribution products
- Standard UL 512 and CSA fuse block configurations
- Industrial and commercial panelboards
