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Littelfuse FLSR400X industrial fuse

The FLSR400X series fuse offers reliable overcurrent protection with a dual-element design suitable for various industrial applications. Rated for 600 V AC, it features current limiting properties, short-circuit current ratings up to 200 kA rms symmetrical, and is UL listed and CSA certified. These fuses are ideal for service entrance switches, transformers, motor control centers, and switchboard mains. Available in indicating and non-indicating versions, they provide precise overload and short-circuit protection for heavy-duty circuits, ensuring safety and operational continuity.

Authorized Distributors
Source:DigiKey
Part No:FLSR400.X
Stock:1
Inv Date:05-28-2026
Price: Unit price: $286.4
Buy/RFQ:
Part No:FLSR400.X
Stock:0
Inv Date:05-28-2026
Price: Unit price: $316.5
Buy/RFQ:
Part No:FLSR400.X
Stock:6
Inv Date:05-28-2026
Price: Unit price: $246.88
Buy/RFQ:
Part No:FLSR400.X
Stock:6
Inv Date:05-28-2026
Price: Unit price: $246.88
Buy/RFQ:
Part No:FLSR400.X
Stock:0
Inv Date:05-28-2026
Price: Unit price: $156.44
Buy/RFQ:

Littelfuse FLSR400X industrial fuse Specifications:

  • Voltage Ratings: AC: 250 V (FLNR_ID), 600 V (FLSR_ID); DC: 125 V (FLNR 1/10 ~ 30 A), 125 V (FLNR_ID 35-600 A), 300 V (FLSR_ID)
  • Interrupting Ratings: AC: 200 kA rms, DC: 20 kA
  • Ampere Range: Up to 600 A
  • Design: Dual-element, current limiting, fast response
  • Certifications: UL Listed, CSA Certified, Federal Specification WF-1814
  • Dimensions: Vary by rating; detailed in technical charts, typical approximate length 2.75 inches
  • Features: Available with indication or non-indicating, compact size, suitable for heavy-duty circuits
  • Application: Protects service entrance switches, transformers, motor control circuits, switchboard mains, and feeders

Buy the Littelfuse FLSR400X – Reliable Industrial Fuse for Heavy-Duty Circuits

Purchase the Littelfuse FLSR400X fuse online today to ensure optimal protection for your heavy-duty electrical circuits. Designed with dual-element technology, this fuse offers superior short-circuit and overload protection, rated for 600 volts AC, with high interrupting ratings up to 200 kA rms. Its compact design makes it suitable for service entrance switches, transformers, motor control centers, and switchboard mains. Available with indication options, it provides quick fault detection and enhances safety, ensuring your system’s reliability and continuous operation. Buy now for dependable circuit protection.

Get Littelfuse FLSR400X today—built for precision and long-lasting durability in industrial protection systems.

Frequently Asked Questions

Where can I buy Littelfuse FLSR400X?

You can click on the BUY or RFQ button to purchase FLSR400X from an authorized Littelfuse distributor.

How do I troubleshoot issues or seek technical support for part FLSR400X?

You can download the FLSR400X datasheet or visit the Littelfuse website for support.

Who is the manufacturer of FLSR400X?

Littelfuse

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