Overview
The Bussmann FRS-R-30 is a Class RK5 dual-element time-delay fuse designed for industrial motor control and branch circuit protection. With a 30A rating, 600VAC/300VDC voltage, 200kA interrupting rating at 600VAC and 20kA at 300VDC, this fuse combines overload tolerance with high short-circuit protection. Fusetron fuses deliver 8 seconds minimum of time-delay at 500% of rated current for ratings up to 30A.
Key Features
- Class RK5 dual-element time-delay fuse for rejection or ordinary fuse clips
- Overload element holds five times the ampere rating for minimum ten seconds
- Dual-element design opens in as little as 0.004 second for short-circuit conditions
- UL energy-efficient protection with dual-element, time-delay construction
- Provides high degree of short-circuit protection and current-limitation in surge-prone circuits
- Compatible with Class H, Class K, or Class R fuse blocks via groove or notch design
Technical Specifications
This lot contains two Bussmann FRS-R-30 fuses with the following specifications:
- Rated Amperage: 30A
- Voltage Rating: 600VAC / 300VDC
- Series: FRS-R (Fusetron)
- Class: RK5
- Type: Dual-Element, Time-Delay, Current-Limiting
- Interrupting Rating: 200,000 AIC @ 600VAC; 20,000 AIC @ 300VDC
- Time-Delay Response: 8 seconds @ 500% rated current
- Body Material: Fiberglass
- Diameter: 13/16" (0.81")
- Length: 5"
- Termination: Ferrule
- Fuse Holder Code: P
Typical Applications
FRS-R fuses provide motor overload, ground fault and short-circuit protection. Common applications include:
- Motor and branch circuit protection where higher amperage or voltage ratings are required
- Motor circuits subject to surge currents, allowing sizing close to full-load amperes for maximum protection
- Commercial, industrial and agricultural equipment protection
- Transformer and inductive load circuits
- Combination starters and control equipment
Compatibility & Replacements
Compatible With
- Class R rejection-type fuse blocks and cartridge holders
- Standard fuse clips rated for 600V
- Industrial control centers and combination starters
- Motor control circuits up to 600VAC
Replaces / Drop-In Replacement For
- Mersen / Ferraz Shawmut TRS-R-30
- Littlefuse FLSR-30
- Other Class RK5 30A fuses with identical footprint (verify with system integrator)
Works With
- All 600VAC motor control circuits
- Electrical distribution panels and switchboards
- Disconnect switches and safety switches rated for 600V
- Eaton / Cutler-Hammer combination starters
- Allen-Bradley and other industrial control equipment compatible with Class R fuses
