Overview
The Bussmann SOY-B is a double receptacle fuse box cover unit engineered for low-cost supplemental protection in fractional horsepower motor circuits. As part of the Fusetron product line, the SOY-B provides accessible dual fuse mounting in a compact square profile, making it ideal for retrofitting existing electrical enclosures without major rewiring. Bussmann is a trusted leader in fuse and fusible protection systems, and the SOY-B model carries the heritage of reliability across industrial, commercial, and residential applications.
Key Features
- Double fuse holder design protects two independent motor circuits
- Edison-base receptacle fuses with threaded mount for secure installation
- Manual switch control included for load disconnection
- Fits standard 4-inch square electrical boxes
- UL listed for safety compliance
- Compatible with Bussmann Edison Type T, TL, TC, P, and W plug fuses
Technical Specifications
| Voltage Rating | 125 VAC |
| Current Rating | 15 A |
| Horsepower Rating | 3/4 HP per motor (dual motors) |
| Fuse Type | Edison Base Plug Fuse (Type T, TL, TC, P, W) |
| Number of Fuse Holders | 2 (Double) |
| Box Type Compatibility | 4-Inch Square Standard Electrical Box |
| Control Features | Manual Switch Control with Protective Cover |
| Material | Steel with protective lid |
| Certification | UL Listed |
| Part Number | SOY-B |
| Manufacturer | Eaton Bussmann (Cooper Bussmann) |
Typical Applications
The Bussmann SOY-B is widely used in:
- Fractional horsepower single-phase motor circuits (pumps, blowers, compressors)
- HVAC equipment, power tools, and small machine controls
- Supplemental overload and short-circuit protection below main branch circuit breaker rating
- Industrial automation equipment requiring localized motor circuit protection
- Retrofit applications where dual independent fuse protection is required without box replacement
Compatibility & Replacements
Compatible With
- Bussmann Edison Type T dual-element fuses
- Bussmann Edison Type TL, TC, P, and W plug fuses
- SA fuse adapters (with note: may prevent cover from fully closing)
- Standard 4-inch square electrical enclosures and junction boxes
- Single-phase, 125V AC electrical systems
Replaces / Drop-In Replacement For
The SOY-B replaces earlier single-fuse or non-switching fuse box covers in standard applications. Verify compatibility with your system integrator before ordering, as exact cross-references depend on existing box size and fuse configuration.
Works With
- Edison-base threaded plug fuses (non-rejection type)
- Dual independent motor load circuits
- Manual load disconnect and overcurrent protection applications
- Supplemental fusing systems per NEC requirements
