3D Inspection Solutions

Littelfuse Launches High Amperage Rating Fuse Blocks for 5x20mm Fuses

Available in surface- and through-hole mount options to support more demanding applications

CHICAGO, September 5, 2023 —  Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, and safer world, announced the latest release of the 656 and 658 Series Fuse Blocks product line. These fuse blocks offer a higher amperage rating, giving electronics engineers and designers more options depending on their specific application requirements.

The key differentiator of these high-resistance fuse blocks is their ability to support a higher amperage rating available in PCB-mounted (656) and surface-mounted (658) options. While the current versions are rated up to 16 A, Littelfuse is now offering versions rated at 20 A and 30 A. This expanded range allows customers to choose the appropriate amperage rating based on the needs of their applications, which include:

  • Consumer electronics,
  • Data centers,
  • Telecom,
  • Building and home automation,
  • Appliances,
  • HVACR,
  • General industrial, and
  • Electrical equipment.

These new fuse blocks provide our customers with greater flexibility and choice.

3D Inspection Solutions | Koh Young America

Style Liu, Global Product Manager at Littelfuse

By offering higher amperage ratings, we ensure our customers have the necessary options to meet their specific application requirements.

Style Liu, Global Product Manager at Littelfuse

The 656 and 658 Series Fuse Blocks offer the following key benefits:

  • Provides PCB-mounted and surface-mounted solutions for designs that require 5 x 20 mm fuse sizes.
  • High voltage 500 V ac / V dc rating with 30 A current rating that accommodates many power applications.
  • UL recognized to UL / CSA 4248-1


The 656 and 658 Series Fuse Blocks are available in bulk packs of 100 pieces, and 658 Series is also available in tape and reel format in quantities of 400. Place sample requests through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

For More Information

Additional information on the latest series release is available on the 656 and 658 Series Fuse Blocks product page. For technical questions, please contact Style Lui, Global Product Manager, sliu@littelfuse.com.

About Littelfuse

Littelfuse is a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 20 countries, and with approximately 18,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets—everywhere, every day. Headquartered in Chicago, Illinois, United States, Littelfuse was founded in 1927. Learn more at Littelfuse.com.

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