L50QS Series - High-Speed Round Body Fuses

The L50QS Series is a next generation High-Speed Fuse for the protection of power semiconductor devices and is designed in the Traditional North American Bolted Style package.

L50QS Series High-Speed Fuses are extremely current limiting and are used to protect power converters, drives and control circuit applications. Designed with lower I2t performance characteristics, these fuses provide balanced performance to extend longevity while lowering potentially damaging heat energy to the devices being protected.

In addition L50QS Series fuses have been designed with a universal mounting option to meet customer requirements for installation into a variety of application configurations Littelfuse POWR-SPEED™ products offer optimized circuit protection at the extremely fast speed required to protect modern day, sensitive, high-power semiconductor devices. Such products are commonly found in various industries including pulp and paper industries, cranes and heavy-lifting equipment, processing industries, wastewater treatment plants and large factories and MRO facilities.

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)VAC (V)VDC (V)Interrupting RatingOpeningStockSamplesCompare
L50QS03535500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS04040500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS05050500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS06060500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS07070500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS08080500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS09090500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS100100500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS125125500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS150150500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS175175500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS200200500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS225225500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS250250500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS275275500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS300300500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS325325500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS350350500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS400400500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS450450500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS500500500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS600600500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS700700500500200kA@500VACVery Fast-Acting (FF)CheckOrder
L50QS800800500500200kA@500VACVery Fast-Acting (FF)CheckOrder

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