FLSR004-ID - 4 Amp Fuse

FLSR004-ID - 4 Amp Fuse

When you need precision protection for critical and sensitive equipment, the Littelfuse FLSR004ID delivers. This 4-amp, dual‑element time‑delay cartridge fuse is built to handle the rigors of industrial control panels, motor‑driven systems, switchboards, and manufacturing automation. With its 600 V AC/300 V DC voltage ratings and a high interrupting capability, the FLSR004ID gives you dependable defense against both overloads and short‑circuits. The built‑in blown‑fuse indicator adds a visual cue for quicker troubleshooting and less downtime in demanding environments.

Key Features and Benefits

• Time‑Delay / Slo‑Blo Design: Handles temporary inrush currents (such as motor starts) without unnecessary blowing, minimizing service interruptions and replacement costs.
• High Voltage Capability: Rated for up to 600 V AC and 300 V DC, giving versatility across a wide range of industrial systems.
• Industrial Cartridge Style Construction: The standard 13/16"×5" barrel provides secure mounting in fuse holders and panels, supporting safe, standardized installations.
• Visual Indicating Feature: The built‑in indicator window clearly shows when the fuse has operated, enabling faster diagnosis and less downtime.
• Advanced Dual‑Element & Current‑Limiting Protection: Helps restrict fault current and provides superior protection under overload and short‑circuit conditions.

Technical Specifications

• Current Rating: 4 Amps
• Voltage Ratings: 600 V AC / 300 V DC
• Interrupting Rating: Up to 200 kA AIC at 600 V AC; 20 kA at 300 V DC
• Fuse Class: Class RK5 (UL 248‑12)
• Construction: Single‑barrel industrial cartridge style
• Opening Characteristic: Time‑delay (also referred to as “slo‑blo”) dual‑element

Material Compliance and Certifications

• UL Listed: (File E81895)
• CSA Certified: (File LR29862)
• Designed to help meet environmental standards: (check with manufacturer for full RoHS and material disclosures)

Where It Works Best

• Low‑amperage motor protection such as small drive systems or auxiliary motors.
• Industrial control panels and feeders where inrush currents may occur — the time‑delay design prevents nuisance opening.
• Commercial and industrial electronic equipment requires reliable protection in demanding environments.
• Power distribution systems in manufacturing, process automation, machine tools, or other critical loads where quick fault indication adds value.
• Sensitive circuits where the visual status of the fuse (indicating feature) helps maintenance teams act faster and reduce downtime.