FLSR100-ID - 100 Amp Fuse

FLSR100-ID - 100 Amp Fuse

Upgrade your electrical protection strategy with the Littelfuse FLSR100ID, a high‑performance 100 amp, 600 volt (AC) / 300 volt (DC) Class RK5 indicating time‑delay fuse. Designed specifically for demanding industrial and commercial environments, this fuse delivers reliable over‑current protection while reducing downtime and simplifying maintenance. With its dual‑element time‑delay construction and built‑in visual blown‑fuse indicator, the FLSR100ID lets you spot a fault at a glance without taking equipment offline—saving valuable troubleshooting time and keeping your systems running. The knife‑blade terminals ensure secure, low‑resistance connections in heavy‑duty panelboards, motor circuits, and transformer feeds. Whether you’re safeguarding motors, lighting circuits, or control panels, this fuse brings peace of mind and long service‑life performance.

Key Features and Benefits

• Time‑Delay (Dual‑Element) Performance: Ideal in circuits with high inrush loads (such as motors or lighting banks), this fuse withstands temporary surges without nuisance blowing, yet still responds quickly to over‑current faults.
• Indicating Feature: A built‑in indicator window turns black when the fuse opens, enabling faster fault identification and minimizing system downtime.
• Dual‑Element Design with Current Limiting: Offers superior protection by reducing peak let‑through energy and limiting fault current, which helps safeguard sensitive equipment and reduce risk of collateral damage.
• Heavy‑Duty Knife‑Blade Terminals: Designed for secure insertion into fuse blocks or clips, these terminals provide stable, low‑resistance connections in industrial power‑distribution environments.
• Wide Voltage Ratings: Rated for up to 600 V AC and 300 V DC, making this fuse suitable for a broad range of electrical systems.

Technical Specifications

• Catalog Number: FLSR100ID
• Current Rating: 100 Amps (continuous)
• Voltage Rating: 600 V AC maximum / 300 V DC maximum
• Fuse Class: Class RK5 (time‑delay)
• Interrupting Rating (AC): 200 kA rms symmetrical at 600 V
• Interrupting Rating (DC): 20 kA at 300 V
• Terminal Type: Knife‑Blade
• Indicating: Yes (visual blown‑fuse indication)

Material Compliance and Certifications

• UL Listed (File: E81895)
• CSA Certified (File: LR29862)
• RoHS Compliant (meets global environmental requirements)

Where It Works Best

• The Littelfuse FLSR100ID is an excellent choice when you’re protecting critical equipment where reliability matters and troubleshooting speed matters even more. Use it in applications such as motor control centres, transformer feeds, switchboard mains and feeder panels, industrial lighting circuits, and general‑purpose distribution panels in manufacturing plants, commercial buildings, utility service‑entrance systems, or any installation where downtime must be minimized. In short, if you’re specifying a fuse for heavy‑duty circuits that require both dependable fault‑clearing and quick visual identification of failures, this fuse is a top‑tier option.