Semiconductor Fuses


  • Littelfuse PSR High-Speed Fuse Series

    PSR Flush End

  • Littelfuse PSR Series High-Speed Square Body Fuses are specially designed for protection of power se...More

  • Amps (A): 40, 50, 050, 63, 063, 80, 080, 100, 125, 160, 200, 250, 280, 315, 350, 400, 450, 500, 550, 630 more

  • Interrupting Rating: 100kA@1300VAC, 200kA@600VAC, 200kA@650VAC, 200kA@700VAC

  • Opening: Very Fast-Acting (FF)

  • L50QS

  • The L50QS Series is a next generation High-Speed Fuse for the protection of power semiconductor devi...More

  • Amps (A): 35, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 400, 450 more

  • VAC (V): 500

  • VDC (V): 500

  • L70QS

  • The L70QS Series is a next generation High-Speed Fuse for the protection of power semiconductor devi...More

  • Amps (A): 35, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600 more

  • VAC (V): 700

  • VDC (V): 700

  • Littelfuse L75QS

    L75QS

  • The L75QS Series is a next generation High-Speed Fuse for the protection of power semiconductor devi...More

  • Amps (A): 35, 40, 50, 60, 70, 80, 90, 100, 125, 150, 175, 200, 225, 250, 300, 350, 400, 450, 500, 600 more

  • VDC (V): 750

  • Interrupting Rating: 50kA@750VDC

Semiconductor fuses protect against overcurrents in various semiconductor applications such as rectifiers, inverters, DC drives, UPS and variable speed drive systems. Littelfuse offers a wide variety of semiconductor fuses to meet your growing needs.

pdf icon POWR-Speed Technical Application Guide

Your complete guide to high-speed (semiconductor) fuses. Download the application guide to find out more.

pdf icon POWR-SPEED® Range of High-Speed Fuses - Flyer

Optimized protection for your power electronics.

PSR Series POWR-Sell

Optimize protection for your power electronics with Littelfuse POWR-SPEED® range of High-Speed Fuses

pdf icon POWR-SPEED® Fuse Cross Reference

This guide covers the most popular high-speed fuse types that Littelfuse has in stock and ready to ship.

pdf icon POWR-SPEED® Catalog

These certified high-speed fuses are optimized for performance and efficiency to better protect your critical power semiconductors against short circuits. PF611

pdf icon POWR-SPEED® Range of High-Speed Fuses Flyer - Mandarin

为您的电力电子设备提供最佳保护

pdf icon PSR Series POWR-Sell Flyer - Mandarin

采用Littelfuse POWR-SPEED® 系列高速熔断器优化电力 电子的保护

pdf icon POWR-SPEED® Catalog - Mandarin

高速半导体熔断器产品目录

pdf icon POWR-SPEED® Fuse Cross Reference - Mandarin

本指南涵盖Littelfuse最受欢迎的 高速熔断器类型,库存充足,可随 时发货!交叉引用旨在对快速识别 和产品选型作出指导。我们建议 您在进行替换之前查看全部适用 规格。