POWR-SPEED
®
PRODUCTS HIGH-SPEED FUSES FUSE BLOCKS & HOLDERS
SPECIAL PURPOSE FUSES
MICROSWITCHES
HIGH-SPEED SEMICONDUCTOR PRODUCTS CATALOG
Battery Protection Fuses
Battery protection requires higher dc voltage, dc current
and interrupting rating fuses then other applications.
These specialty fuses deliver high-speed protection at the
increased voltage coupled with better interrupting ratings,
to prevent costly catastrophic failures due to overcurrents.
ESR Series PSX Series with microswitch
1 of 68
Littelfuse.com/powr-speed
© 2023 Littelfuse, Inc.
INTRODUCTION
POWR-SPEED
®
High-Speed Semiconductor Fuses ..................................... 2
POWR-SPEED FUSES
High-Speed Square-Body Fuses
ESR Series ....................................................................................................... 6
PSX Series ...................................................................................................... 9
PSR Series Flush End ................................................................................... 12
PSR Series Bolted Blade ............................................................................... 18
PSR Series DIN Blade ................................................................................... 24
High-Speed Round-Body Fuses
L75QS Series ................................................................................................. 30
L70QS Series ................................................................................................. 35
L50QS Series ................................................................................................. 36
L70S Series ................................................................................................... 40
L50S Series ................................................................................................... 43
L15S Series ................................................................................................... 46
L25S Series ................................................................................................... 50
L60S / KLC Series ......................................................................................... 54
POWR-SPEED FUSE ACCESSORIES
LSCR Series High-Speed Fuse Blocks .......................................................... 58
MS Series High-Speed Microswitches ........................................................ 62
SPECIAL PURPOSE FUSES
Telecommunications
L17T Series Telecom Power Fuses ............................................................... 64
TLS Series Telecom Power Fuses ................................................................. 65
CROSS REFERENCE GUIDE
POWR-SPEED Fuse Cross Reference ........................................................... 68
High-Speed Semiconductor Fuses Catalog
TABLE OF CONTENTS