Bussmann Fusetron FRN-R-2-1/4 Dual-Element Time-Delay Fuse Class RK5 (Box of 10)
The Bussmann Fusetron FRN-R-2-1/4 is a 2.25-amp, 250V, Class RK5 dual-element time-delay fuse designed to provide superior protection for electrical circuits. This fuse is ideal for applications requiring both overload and short-circuit protection, such as combination starters, motor control centers, machinery disconnects, and power panelboards.
Key Features
- Dual-Element Design: Offers advanced protection by combining separate overload and short-circuit elements, allowing for closer sizing to motor full load amperes (FLA).
- Time-Delay Capability: Provides a minimum of 10 seconds delay at 500% of rated current, accommodating temporary inrush currents without nuisance openings.
- High Interrupting Rating: Rated at 200,000 amperes interrupting capacity (AIC) at 250V AC and 20,000 AIC at 125V DC, ensuring reliable performance under fault conditions.
- Current Limiting: Reduces the let-through energy during short-circuit events, protecting downstream equipment from damage.
- Compact Dimensions: Measures 0.56 inches in diameter and 2 inches in length, facilitating easy installation in standard fuse holders.
Specifications
- Voltage Rating: 250V AC / 125V DC
- Amperage Rating: 2.25 Amps
- Interrupting Rating: 200 kA at 250V AC; 20 kA at 125V DC
- Response Time: 10 seconds at 500% of rated current
- Body Type: Cylindrical with ferrule ends
- Material: Fiberglass body for enhanced durability
Applications
The FRN-R-2-1/4 fuse is suitable for a variety of industrial and commercial applications, including:
- Motor overload and ground fault protection
- Protection against single-phasing on three-phase systems
- Use in combination starters and motor control centers
- Integration into machinery disconnects and power panelboards
Compliance and Certifications
- UL Listed: Standard 248-12, Class RK5, Guide JDDZ, File E4273
- CSA Certified: C22.2 No. 248.12, Class 1422-02, File 53787
- CE Marked: Indicating compliance with European standards
Each box contains 10 fuses, providing a convenient solution for maintenance and replacement needs in various electrical systems.
