FRS-R-20 - 20Amp Fuse

FRS-R-20 - 20Amp Fuse

Meet the FRS‑R‑20 from the renowned Eaton Bussmann series—a 20-amp, dual‑element, time‑delay fuse crafted for demanding industrial and commercial applications. If your system needs to handle motor start surges, transformer energizing, and other abrupt inrush events without nuisance tripping, this fuse delivers. Rated at 600 Vac / 300 Vdc, and capable of interrupting 200 kA in AC and 20 kA in DC fault conditions, the FRS‑R‑20 provides peace of mind by limiting fault let‑through energy, protecting downstream equipment, and helping maximize uptime. With a built‑in 10‑second delay at 500 % of rated current, you get dependable protection that tolerates benign surges while immediately responding to dangerous overloads—an essential safeguard for mission‑critical motor control centers, panelboards, HVAC systems, and other heavy loads.

Key Features and Benefits

• Time‑delay, dual‑element design: Lets you avoid nuisance trips during harmless inrushes, such as motor startups.
• Current‑limiting performance: Drastically reduces let‑through energy (I²t) during fault events, protecting sensitive downstream components.
• High interrupting ratings: 200 kA at 600 Vac, 20 kA at 300 Vdc mean the fuse can safely clear large faults with minimal collateral stress.
• Designed for heavy‑duty environments: Ideal for motors, transformers, inductive loads, and systems where reliability and protection matter.
• Compact cartridge format: Fits standard holders (cartridge style) and integrates easily into existing industrial or commercial power distribution systems.

Technical Specifications

• Catalog Number: FRS‑R‑20
• Amperage Rating: 20 A
• Voltage Rating: 600 Vac / 300 Vdc
• Interrupting Rating: 200 kA AC (600 Vac) / 20 kA DC (300 Vdc)
• Time Delay: Minimum 10 seconds at 500% of rated current (inrush tolerance)
• Fuse Type: Class RK5, dual‐element, time‑delay, non‑indicating (standard)
• Dimensions: Approximately 5.0 in length and 0.81 in diameter for the 20 A version.
• Weight: ~0.16 lb (0.16 lb quoted; actual manufacturer may vary slightly)

Material Compliance and Certifications

• UL 248‑12 certified: (Class RK5 fuses)
• CSA C22.2 No. 248.12 certified
• CE marked: For applicable international markets
• Note: While the manufacturer does not always list lead‑free/RoHS status for this specific model, consult Eaton’s full datasheet for your region if that’s a requirement in your facility.

Where It Works Best

• This fuse thrives in applications where heavy loads and transient inrush currents are the norm—not the exception. Use it in motor control centers, industrial panelboards, HVAC units, machine disconnects, and branch circuits where you want to minimize downtime and maximize protection. It’s especially well-suited when you need a fuse that can “ride through” brief surges without tripping but instantly act when there’s a real fault.