The Bussmann BP/FRN‑R‑15ID is a premium, dual‑element, time‑delay fuse designed for superior overload and short‑circuit protection in demanding electrical environments. Engineered within the widely trusted Fusetron FRN‑R series, this fuse is built to handle the elevated inrush currents typical of motors, transformers, and inductive loads—allowing equipment to start smoothly while still providing rapid protection against damaging sustained overloads.

Its dual‑element construction separates short‑circuit and overload protection, enabling precise performance during both temporary surges and dangerous fault conditions. The “Easy‑ID” indicator window darkens when the fuse opens, allowing fast troubleshooting and reducing downtime in commercial, industrial, and facility‑maintenance settings.

Designed for compatibility with standard RK5‑rated fuse holders, the BP/FRN‑R‑15ID offers reliable, energy‑efficient protection across a wide range of electrical applications.

Key Features

• 15‑Amp Time‑Delay Protection ideal for circuits with high motor starting currents. 
• Dual‑Element Design separates overload and short‑circuit protection for enhanced safety and fewer nuisance openings.
• Current‑Limiting Class RK5 Construction provides fast response to short‑circuit conditions, helping minimize equipment damage.
• Easy‑ID Blown‑Fuse Indicator darkens when the fuse opens to simplify diagnostics and speed up maintenance.
• Allows Temporary Overloads such as motor and transformer inrush without opening unnecessarily. 
• Durable Cartridge Body built for dependable long‑term electrical performance.
• Drop‑In Upgrade compatible with existing Class RK5, RK1, K5, and many H‑class fuse blocks.
• UL and CSA Listed for reliable, recognized protection. 

Specifications

• Amperage Rating: 15 A 
• Voltage Rating: 250 V AC / 125 V DC 
• Time‑Delay Rating: Minimum 10 seconds at 500% of rated current (8 seconds for small amp sizes)
• Fuse Class: RK5 (current‑limiting) 
• Type: Dual‑element, time‑delay cartridge fuse 
• Indicator: Integrated open‑fuse visual indicator on select models (ID version) 
• Interrupting Rating: Up to 200 kA, depending on system configuration 
• Construction: Cartridge style with brass/fiberglass body and reinforced terminals
• Compatibility: Fits RK1, RK5, K5, and many standard fuse holder families 
• Element Type: Dual element for precise overload and fault separation 

Applications

The Bussmann BP/FRN‑R‑15ID is ideal for circuits that experience temporary inrush currents yet still require dependable overload and short‑circuit protection:

• Motor Control Centers and machinery requiring high‑performance time‑delay characteristics. 
• Power Panelboards in commercial and industrial environments. 
• Combination Starters and equipment subject to brief overload surge conditions. 
• Machinery Disconnects ensuring selective coordination and reduced nuisance outages. 
• Transformers and inductive‑load circuits, where inrush demands must be tolerated safely.
• Facilities Maintenance and Industrial Electrical Panels needing easy troubleshooting via indicator ID window.