JLLN175 - 175Amp Fuse

JLLN175 - 175Amp Fuse

If you’re looking for dependable protection in demanding power‑system environments, the Littelfuse JLLN175 Class T 175 A fast‑acting fuse is engineered to meet the challenge. With a 175‑amp rating and dual voltage handling of up to 300 VAC and 125 VDC, it delivers high‑capacity fault interruption for installations with compact layouts and high speed requirements. The JLLN175 interrupts fault currents up to 200,000 A at 300 VAC, allowing it to quickly isolate dangerous short‑circuit events, protect sensitive equipment and maintain continuity of service in UPS systems, motor drives and switchboards.

Key Features and Benefits

• High‑Speed Fault Protection: Responds in a fraction of a second to over‑current events, helping safeguard downstream devices from damage.
• Space‑Efficient Class T Form Factor: Its compact design makes it easier to fit into control panels, compact power distribution systems or retrofits where space is at a premium.
• Knife‑Blade Style Terminals: Provides a secure, low‑impedance mounting option in high‑current circuits, helping maintain performance under heavy loads.
• Current‑Limiting Performance: Reduces peak let‑through energy during fault events, lessening thermal and mechanical stress on circuit components and improving system longevity.

Technical Specifications

• Current Rating: 175 A
• Voltage Ratings: 300 VAC / 125 VDC
• Interrupting Ratings: 200,000 A at 300 VAC; 20,000 A at 125 VDC
• Response Type: Fast‑Acting (F)
• Mounting Method: Knife‑Blade / Bolt‑In
• Fuse Class: UL Class T
• Indication Feature: None
• Body Construction: Premium materials engineered for durability and arc‑suppression

Material Compliance and Certifications

• UL Listed in accordance with UL 248‑15 standards for Class T fuses
• CSA Certified to Canadian regulatory standards
• RoHS Compliant – manufactured without restricted hazardous substances
• CE Marked – meets applicable European electrical safety directives

Where It Works Best

• Large Motor Starters and Variable Speed Drives: Offers high‑capacity protection for systems where fault currents can be substantial and rapid reaction is vital.
• Power Management Systems (UPS, Rectifiers, Inverters): Ideal for mission‑critical installations that require reliable fault isolation to maintain uptime and protect downstream electronics.
• Compact Electrical Panels and Control Cabinets: The Class T form factor and high interrupt rating let you deploy powerful protection even when panel space is limited.
• Main Breaker Panels and Sub‑main Switchboards in Commercial/Industrial Facilities: Provides dependable protection for main circuits where surges and fault currents must be safely handled.