Littelfuse LLSRK050ID POWR-GARD RK1 Time-Delay Current-Limiting Fuse 50 A (1-1/16 in x 5-1/2 in) LFULLSRK050ID

Product Description

The Littelfuse LLSRK050ID is a POWR-GARD Class RK1 current-limiting, time-delay cartridge fuse rated 50 A for 600 VAC and 300 VDC service. It features dual-element construction, an indicating window for blown-fuse identification, and a precision-formed short-circuit element with granular quartz filling. Typical applications include motor protection, transformer circuits, and general industrial circuit protection where reduced nuisance openings and IEC type 2 protection are required.

• Rated 50 A; voltage: 600 VAC / 300 VDC; interrupting rating: 200 kA @ 600 VAC and 20 kA @ 300 VDC
• Dual-element time-delay design with precision-formed short-circuit element, granular quartz fill, plated end caps and elastomeric silicone overload section
• Cartridge body 1-1/16 in diameter x 5-1/2 in length, ferrule terminals, holder mounting, indicating window for instant blown-fuse ID

Product Highlights

Class RK1, current-limiting time-delay fuse with indicating window and IEC type 2 motor starter protection

Product Information

Standard Information

• Brand: LITTELFUSE
• Manufacturer Part Number: LLSRK050ID
• Country of Origin: Mexico

Technical Specifications

• MPN: LLSRK050ID
• Brand: Littelfuse
• Series: LLSRK
• Class: RK1
• Type: Current limiting, Time delay (dual element)
• Element: Dual
• Amperage Rating: 50 A
• Voltage Rating (AC): 600 VAC
• Voltage Rating (DC): 300 VDC
• Interrupting Rating (AC): 200 kA @ 600 VAC
• Interrupting Rating (DC): 20 kA @ 300 VDC
• Body Size (Diameter x Length): 1-1/16 in x 5-1/2 in
• Body Type: Cartridge
• Terminal Type: Ferrule
• Mounting Type: Holder (inline/holder, fuse block/clip compatible)
• Material / Construction: Fiberglass reinforced pultruded body; granular quartz filling; plated end caps; precision-formed short-circuit element; elastomeric silicone overload section
• Indicating: Yes (patented indicator window)
• Applications: Motor protection, transformers, general purpose industrial circuits, safety upgrades
• Standards / Approvals: UL 248-12; CSA; Federal Specification WF-1814; IEC type 2 no-damage protection referenced
• Country of Origin: Mexico
• Additional Features: POWR-PRO performance; precision-formed short-circuit elements; solid-state overload section (no moving parts)