Littelfuse FLQ Series 500V Slo-Blo Midget Fuse

Littelfuse FLQ Series 500V Slo-Blo Midget Fuse

The Littelfuse FLQ Series 500V Slo-Blo Midget Fuse is a time-delay fuse line built to deliver dependable supplemental circuit protection wherever high inrush currents are present, and this product page covers both the FLQ.250 and FLQ.600 models. Every FLQ Series fuse carries UL and CSA 500-volt ratings for use on 480-volt circuits, is built in the compact Midget/5AG package size for standard fuse holders and fuse blocks, and is rated 500VAC / 300VDC with a 10000A@500VAC interrupting rating. The Slo-Blo/Time Lag (T) opening characteristic protects control power transformers, solenoids, and small motors from damaging overcurrent conditions without nuisance tripping during normal startup surges.

Key Features

• Voltage Rating: Rated 500VAC and 300VDC, FLQ Series fuses carry UL and CSA 500-volt ratings that permit use on 480-volt circuits for broad application flexibility.
• Time-Delay Operation: The Slo-Blo/Time Lag (T) opening characteristic provides excellent supplemental protection for control power transformers, solenoids, and circuits subject to high inrush currents.
• Interrupting Rating: A 10000A@500VAC interrupting rating gives these fuses the capacity to safely clear high fault currents in demanding electrical systems.
• Package Size: Built in the compact Midget/5AG package size, FLQ Series fuses fit standard midget fuse holders and fuse blocks used throughout industrial and commercial equipment.
• Model Options: Available in FLQ.250 and FLQ.600 versions to match different amperage requirements within the same Slo-Blo Midget platform.
• Motor Protection: FLQ fuses also provide supplemental protection to small motors, guarding connected equipment against sustained overcurrent conditions.
• Branch-Circuit Guidance: For motor branch-circuit protection applications, Littelfuse recommends its Class CC fuse line rather than the FLQ Series.

Certifications & Compliance

• UL Listed for circuit protection applications
• CSA Certified for use in Canadian electrical systems
• 500-Volt Rating Permits Use on 480-Volt Circuits

Technical Specifications

• Series: FLQ
• Amperage Rating: 0.250A (FLQ.250)
• Standards: UL-CSA

Typical Applications

• Control Power Transformer Protection
• Solenoid Circuit Protection
• High-Inrush Current Circuits
• Supplemental Protection for Small Motors
• Industrial and Commercial Control Panels

Why Littelfuse?

Littelfuse engineers the FLQ Series to meet UL and CSA 500-volt standards, giving electrical professionals a fuse line they can rely on for consistent, code-compliant performance across both FLQ.250 and FLQ.600 models. The Slo-Blo time-delay design and 10000A@500VAC interrupting rating reflect the kind of robust construction demanded in commercial and industrial control circuits. Choose the Littelfuse FLQ Series for supplemental protection built to keep control power transformers, solenoids, and small motors running safely.