FLNR150-ID - 150 Amp Fuse

FLNR150-ID - 150 Amp Fuse

When system uptime matters, and you simply can’t afford needless downtime, the Littelfuse FLNR150‑ID delivers industry‑leading protection built for demanding commercial and industrial installations. Offering a continuous 150 A rating, 250 V AC / 125 V DC capability, and interruption ratings of up to 300 kA AC and 20 kA DC, this dual‑element, time‑delay (Slo‑Blo) fuse is designed to endure the high‑inrush surges common with motors, HVAC systems, and heavy equipment without tripping prematurely. The built‑in visual indicator gives you instant blown‑fuse identification, enabling rapid troubleshooting and reducing costly downtime. Solid knife‑blade terminations ensure a secure connection in rugged environments, while the Class RK5 rating and compliance with UL, CSA and NEC standards make it a trusted choice for professionals tasked with safeguarding critical power‑distribution systems. Whether you’re managing a manufacturing line, a data center, or a commercial building service panel, this fuse brings reliable, high‑capacity fault‑protection performance—so you can confidently keep operations running.

Key Features & Benefits

• Visual indicator lets you instantly spot a blown fuse for faster service restoration.
• Time‑delay, dual‑element design handles high inrush currents (from motors/transformers) without nuisance trips.
• Impressive interrupting capacity (up to 300,000 A AC / 20,000 A DC) protects against extreme fault conditions.
• Knife‑blade terminals provide strong, reliable connections suited for industrial panel boards and heavy‑duty systems.
• Class RK5 rating is designed specifically for heavy commercial and industrial circuit protection.
• Manufactured by Littelfuse, a trusted name in circuit‑protection components, giving you confidence in durability and performance.

Technical Specifications

• Catalog Number: FLNR150‑ID
• Current Rating: 150 Amps (continuous)
• Voltage Rating: 250 V AC / 125 V DC
• Interrupting Capacity: Up to 300,000 A AC (self‑certified) / 20,000 A DC
• Fuse Type: Dual‑element, time‑delay (“Slo‑Blo”)
• Fuse Class: RK5
• Terminal Style: Knife‑blade / rejection style blade construction
• Indicator: Yes – built‑in visual blown fuse indicator

Material Compliance and Certifications

• UL Listed (meets UL 248‑12, Class RK5)
• CSA Certified
• Manufactured to meet applicable ROHS/environmental standards (check latest datasheet for full details)

Where It Works Best

• This fuse is ideal for installations in industrial manufacturing facilities, heavy‑duty commercial buildings, mission‑critical data centers, and infrastructure projects that require dependable fault‑protection for power distribution equipment. If you’re protecting motors, transformers, large HVAC systems, service‑entrance mains, or multi‑panel feeders—especially in environments prone to inrush or surge currents—the FLNR150‑ID offers the capacity, delay characteristics, and visual indication needed to keep things running smoothly and safely.