L50QS Series - High-Speed Round Body Fuses

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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
L50QS035.T FUS 500V SEMICONDUCTOR 35A RoHS No 08/12/2016 PbFree No 08/12/2016 CoC_RoHS9_L50QS035.T_05-28-2020 REACH209_Declaration_-Contain-_L50QS035.T_08-04-2020 No
L50QS050.T FUS 500V SEMICONDUCTOR 50A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS050.T_08-17-2017 REACH197_Declaration_with_Pb_L50QS050.T_02-05-2019 No
Does not Contain
L50QS060.T FUS 500V SEMICONDUCTOR 60A RoHS No 01/22/2017 PbFree No 01/22/2017
L50QS080.T FUS 500V SEMICONDUCTOR 80A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS080.T_02-20-2020 REACH205_Declaration_with_Pb_L50QS080.T_02-20-2020 No
Does not Contain
L50QS125.V FUS 500V SEMICONDUCTOR 125A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS125.V_03-14-2018 No
L50QS150.V FUS 500V SEMICONDUCTOR 150A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS150.V_10-09-2020 REACH209_Declaration_-Contain-_L50QS150.V_10-09-2020 No
L50QS200.V FUS 500V SEMICONDUCTOR 200A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS200.V_08-17-2017 No
L50QS250.V FUS 500V SEMICONDUCTOR 250A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS250.V_05-18-2020 REACH205_Declaration_-Contain-_L50QS250.V_05-18-2020
L50QS300.V FUS 500V SEMICONDUCTOR 300A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS300.V_02-21-2020 REACH209_Declaration_-Contain-_L50QS300.V_09-08-2020 No
L50QS400.V FUS 500V SEMICONDUCTOR 400A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS400.V_08-17-2017 No
L50QS600.X FUS 500V SEMICONDUCTOR 600A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS600.X_11-18-2019 REACH201_Declaration_with_Pb_L50QS600.X_11-18-2019
Does not Contain
L50QS700.X FUS 500V SEMICONDUCTOR 700A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS700.X_11-18-2019 REACH201_Declaration_with_Pb_L50QS700.X_11-18-2019 No
Does not Contain
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