Littelfuse BLF Series Midget Fast-Acting Fuse, 250V, Laminated Tube

Littelfuse BLF Series Midget Fast-Acting Fuse, 250V, Laminated Tube

The Littelfuse BLF Series is a midget fast-acting fuse line rated 250VAC, purpose-built for control circuit and instrument protection in dry locations. Housed in an economical laminated tube construction, the BLF Series is engineered as the lowest-price midget fuse in the Littelfuse lineup, giving panel builders and OEMs an affordable way to protect low-current control and instrumentation circuits without sacrificing performance. Available in 0.5A and 9A ampere ratings, the BLF Series combines a Fast-Acting (F) opening characteristic with a 10,000A interrupting rating at 250VAC to respond quickly to overcurrent conditions and help protect downstream components and wiring. Its compact Midget/5AG package size allows it to drop into standard midget fuse blocks and holders commonly found in control panels, instrumentation racks, and industrial equipment.

Key Features

• Ampere Rating Options: Available in 0.5A and 9A ratings, allowing precise overcurrent protection sized to the control circuit or instrument being protected.
• Voltage Rating: Rated 250VAC across the series, suitable for control circuit and instrument protection applications operating at standard control voltages.
• Fast-Acting Response: Fast-Acting (F) opening characteristic delivers quick circuit interruption under fault conditions, helping limit damage to downstream equipment.
• Interrupting Rating: 10,000A interrupting rating at 250VAC ensures reliable performance and safe clearing under high fault-current conditions.
• Compact Midget Package: Midget/5AG package size fits standard midget fuse holders and blocks in space-constrained control panels and instrument enclosures.
• Economical Laminated Tube Design: Laminated tube construction makes the BLF Series the lowest-price midget fuse option from Littelfuse, reducing per-point protection cost across large installations.
• Dry Location Use: Suitable for control circuit and instrument protection in dry locations, matching typical indoor panel and instrumentation environments.

Technical Specifications

• Series: BLF

Typical Applications

• Control Circuit Protection
• Instrument and Panel Meter Protection
• Industrial Control Panels
• OEM Equipment and Machinery Protection
• Dry-Location Panel and Enclosure Installations
• Midget Fuse Block and Holder Replacement

Why Littelfuse?

Littelfuse engineers the BLF Series with laminated tube construction to deliver reliable, fast-acting overcurrent protection at an economical price point, making it a practical choice when many protection points are needed across a control system. With 250VAC ratings, a 10,000A interrupting capacity, and ampere options spanning 0.5A to 9A, the BLF Series is built to clear faults safely across a range of control circuit and instrument protection applications. For professionals specifying dependable, cost-effective fuse protection for dry-location control panels and instrumentation, Littelfuse offers the BLF Series as a trusted, purpose-built solution.