Littelfuse FLNR050.TXID Class RK5 Time Delay Fuse 50A 250V

Product Description

The LITTELFUSE FLNR050.TXID is a Class RK5, dual-element, time-delay fuse rated at 50 amps and 250 volts AC. It is a current-limiting fuse designed for general-purpose branch circuit protection in residential, commercial, and light industrial electrical panels. The dual-element construction allows the fuse to tolerate temporary inrush currents from motor loads while still providing reliable overcurrent protection. An integrated visual indicator signals a blown fuse condition, reducing diagnostic time during service calls. Licensed electricians install this fuse in fusible panelboards and disconnect switches where Class RK5 fuses are specified.

This fuse is suited for general-purpose circuit protection applications including motor branch circuits, HVAC equipment disconnects, and feeder circuits that require a time-delay fuse to handle startup inrush without nuisance opening. The indicating feature makes it a practical choice in multi-fuse panels where rapid fault identification is important. It is appropriate for both new installations and replacement service in existing fusible equipment rated for Class RK5 fuses up to 250 volts AC.

Key Features

• Dual-element design tolerates motor inrush and startup surge currents
• Current-limiting construction reduces fault energy let-through
• Integrated blown-fuse indicator for fast visual fault identification
• Time-delay operation reduces nuisance openings on inductive loads
• Class RK5 rating for use in standard fusible disconnects and panelboards
• UL Listed for general-purpose circuit protection

Compatibility

Designed as an OEM-style replacement Class RK5 time-delay fuse for use in fusible panelboards, disconnect switches, and fuse blocks rated for 250 volt AC, 50 amp, Class RK5 fuses.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize and lock out the circuit before removing or installing fuses. Verify that the replacement fuse class, voltage rating, and ampere rating match the equipment nameplate and original fuse specification before installation. Do not install a fuse with a higher ampere rating than the circuit is designed to carry.