L50QS Series – High-Speed Semiconductor Fuse, Round Body Series - Littelfuse L50QS High-Speed Fuses Provide Superior Protection

Series: L50QS Series – High-Speed Semiconductor Fuse, Round Body
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POWR-Speed Overcurrent Protection Fundamentals
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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 POWR-SPEED® next-generation, high-speed fuse used for the protection of power semiconductor devices and is designed in the traditional, North American-bolted style package. These fuses protect power converters, drives, and control circuit applications. Designed with lower I2t performance characteristics, the L50QS fuses provide balanced performance to extend longevity while lowering potentially damaging heat energy to the devices being protected. The L50QS series is rated at 500 V ac-dc and is extremely current-limiting. These fuses have been designed with a universal mounting option to meet customer requirements for installation into a variety of application configurations.

POWR-SPEED® brand fuses are optimized for performance and efficiency to help extend equipment life. They perform at the extremely fast speed required to protect modern day, sensitive, high-power semiconductor devices. These 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.

Features

  • Extremely current-limiting
  • Low energy let-through (I2t)
  • POWR-SPEED® technology
  • Compliance with US and Canadian requirements
  • Traditional North American bolted style dimensions
  • Direct bus-bar mount or stud-mount design
  • Halogen free, RoHS and REACH compliant
  • Class aR performance

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Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)Interrupting RatingOpeningVAC (V)VDC (V)StockSamplesCompare
L50QS03535200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS04040200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS05050200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS06060200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS07070200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS08080200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS09090200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS100100200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS125125200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS150150200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS175175200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS200200200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS225225200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS250250200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS275275200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS300300200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS325325200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS350350200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS400400200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS450450200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS500500200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS600600200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS700700200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
L50QS800800200 kA @ 500 VacVery Fast-Acting (FF)500500CheckOrder
Catalog # Certificates
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L50QS035 URiconCURicon
L50QS040 URiconCURicon
L50QS050 URiconCURicon
L50QS060 URiconCURicon
L50QS070 URiconCURicon
L50QS080 URiconCURicon
L50QS090 URiconCURicon
L50QS100 URiconCURicon
L50QS125 URiconCURicon
L50QS150 URiconCURicon
L50QS175 URiconCURicon
L50QS200 URiconCURicon
L50QS225 URiconCURicon
L50QS250 URiconCURicon
L50QS275 URiconCURicon
L50QS300 URiconCURicon
L50QS325 URiconCURicon
L50QS350 URiconCURicon
L50QS400 URiconCURicon
L50QS450 URiconCURicon
L50QS500 URiconCURicon
L50QS600 URiconCURicon
L50QS700 URiconCURicon
L50QS800 URiconCURicon
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
L50QS035.T FUS 500V SEMICONDUCTOR 35A RoHS No 08/12/2016 PbFree No 08/12/2016 CoC_RoHS9_L50QS035.T REACH209_Declaration_Contain-_L50QS035.T Yes
08/12/2016		 Contains
L50QS040.T FUS 500V SEMICONDUCTOR 40A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS050.T FUS 500V SEMICONDUCTOR 50A RoHS No 01/22/2017 PbFree No 01/22/2017 REACH197_Declaration_with_Pb_L50QS050.T Yes
01/22/2017		 Contains
L50QS060.T FUS 500V SEMICONDUCTOR 60A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS070.T FUS 500V SEMICONDUCTOR 70A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS080.T FUS 500V SEMICONDUCTOR 80A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS080.T REACH205_Declaration_with_Pb_L50QS080.T Yes
01/22/2017		 Contains
L50QS090.T FUS 500V SEMICONDUCTOR 90A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS100.T FUS 500V SEMICONDUCTOR 100A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017		 IPC_L50QS100.T
L50QS125.V FUS 500V SEMICONDUCTOR 125A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS125.V REACH209_Declaration_Contain-_L50QS125.V Yes
01/22/2017		 Contains
L50QS150.V FUS 500V SEMICONDUCTOR 150A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS150.V REACH209_Declaration_Contain-_L50QS150.V Yes
01/22/2017		 Contains IPC_L50QS150.V
L50QS175.V FUS 500V SEMICONDUCTOR 175A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS175.V REACH211_Declaration_Contain-_L50QS175.V Yes
01/22/2017		 Contains
L50QS200.V FUS 500V SEMICONDUCTOR 200A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS200.V REACH209_Declaration_Contain-_L50QS200.V Yes
01/22/2017		 Contains
L50QS225.V FUS 500V SEMICONDUCTOR 225A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS250.V FUS 500V SEMICONDUCTOR 250A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS250.V REACH205_Declaration_Contain-_L50QS250.V Yes
01/22/2017		 Contains
L50QS275.V FUS 500V SEMICONDUCTOR 275A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS300.V FUS 500V SEMICONDUCTOR 300A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS300.V REACH_SVHC Declaration (Contain)_L50QS300.V Yes
01/22/2017		 Contains
L50QS325.V FUS 500V SEMICONDUCTOR 325A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS350.V FUS 500V SEMICONDUCTOR 350A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS350.V Yes
01/22/2017
L50QS400.V FUS 500V SEMICONDUCTOR 400A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS400.V REACH209_Declaration_Contain-_L50QS400.V Yes
01/22/2017		 Contains
L50QS450.X FUS 500V SEMICONDUCTOR 450A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
L50QS500.X FUS 500V SEMICONDUCTOR 500A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS500.X REACH209_Declaration_Contain-_L50QS500.X Yes
01/22/2017		 Contains
L50QS600.X FUS 500V SEMICONDUCTOR 600A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS600.X REACH201_Declaration_with_Pb_L50QS600.X Yes
01/22/2017		 Contains IPC_L50QS600.X
L50QS700.X FUS 500V SEMICONDUCTOR 700A RoHS No 01/22/2017 PbFree No 01/22/2017 CoC_RoHS9_L50QS700.X REACH201_Declaration_with_Pb_L50QS700.X Yes
01/22/2017		 Contains IPC_L50QS700.X
L50QS800.X FUS 500V SEMICONDUCTOR 800A RoHS No 01/22/2017 PbFree No 01/22/2017 Yes
01/22/2017
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