Overview
The Cooper Bussmann 216-R is a Class R rejection fuse reducer designed for industrial electrical systems. It allows smaller capacity fuses—35 to 60A at 250V or 1 to 30A at 600V—to fit into 100A fuse blocks while maintaining mechanical and electrical contact integrity. This adapter is essential for retrofitting and protecting circuits where oversized fuse blocks are installed.
Key Features
- Class R rejection design prevents interchangeability errors
- Supports dual voltage ratings: 250V and 600V
- Compatible with FRN-R, LPN-RK, FRS-R, LPS-RK, KTN-R, and KTS-R series ferrule and blade-end fuses
- Fits standard industrial panels and Dead-front type switches
- Strong mechanical and electrical contact design
- 1 pair of reducers per package
- Short-circuit current rating (SCCR) up to fuse interrupting rating
Technical Specifications
- Fuse Class: R (rejection)
- Input Voltage/Amperage: 35–60A at 250V; 1–30A at 600V
- Output Amperage: 100A fuse block rating
- Voltage Rating: 250V/600V
- Material: Copper
- Package Contents: 1 pair of reducers
- UPC: 051712613668
- Certifications: UL, CSA
- Weight: 0.27 lb
- Dimensions: 2.5″ L × 1.8″ W × 1.4″ H
Typical Applications
- Industrial control panels requiring fuse size reduction
- Retrofit installations in existing electrical enclosures
- Commercial HVAC and machinery motor protection circuits
- Load centers and switchboards with 100A fuse blocks
- Three-phase power distribution systems
Compatibility & Replacements
Compatible With
- FRN-R series Class R ferrule fuses
- LPN-RK series blade-end Class R fuses
- FRS-R series Class R ferrule fuses
- KTN-R and KTS-R series Class R fuses
- Standard industrial fuse blocks rated 100A
- Dead-front type electrical panels and switches
Replaces / Drop-In Replacement For
- Eaton Bussmann NO.216-R (identical part under Eaton ownership)
- Original Bussmann 216-R units
Works With
- Class R rejection fuse system (prevents use of non-Class R fuses)
- UL and CSA approved electrical enclosures
- Standard 250V and 600V industrial power systems
- Any control panel or switchboard with 100A rated fuse positions
