POWR-SPEED Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES 500 Vac/dc 35-800 A Traditional Round Body Bolted Style HF Specifications Voltage Rating AC: 500V DC: 500V Amperage Rating 35 - 800 A Interrupting Rating AC: 200 kA DC: 50 kA Time Constant 10ms Material Body: Melamine Caps: Copper Alloy (Silver Plated) Approvals UL Recognized (E71611) c-UR-us (E71611) Environmental RoHS Compliant, REACH Country of Origin Mexico Operating Temperature -55C to +125C Storage Temperature Up to 35C with Relative Humidity <65% Description The L50QS Series is a next generation High-Speed Fuse Part Numbering System for the protection of power semiconductor devices and is designed in the Traditional North American Bolted L50 QS 500 X Style package. Series L50QS Series High-Speed Fuses are extremely current limiting and are used to protect power converters, drives Package Quantity Body Type 2 and control circuit applications. Designed with lower I t X = 1 (450 - 800A) Ampere Code performance characteristics, these fuses provide balanced V = 5 (125 - 400A) T = 10 (35 - 100A) 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 BODY AMPERE PACKAGE CATALOG SERIES ORDERING NUMBER universal mounting option to meet customer requirements TYPE CODE QUANTITY NUMBER for installation into a variety of application configurations L50 QS 500 1 L50QS500 L50QS500.X Littelfuse POWR-SPEED products offer optimized circuit protection at the extremely fast speed required to Recommended Fuse Blocks protect modern day, sensitive, high-power semiconductor LSCR001 (35-200A) devices. Such products are commonly found in various LSCR002 (225-800A) industries including pulp and paper industries, cranes and heavy-lifting equipment, processing industries, wastewater treatment plants and large factories and MRO facilities. Features Compliance with US and Canadian Requirements Traditional North American Bolted Style dimensions Class aR performance Direct bus-bar mount or stud mount design Halogen Free, RoHS and REACH Compliant Applications Power Converters (Inverters, Rectifiers) Power Supplies UPS Variable Speed Drives Web Resources Control Circuits Download technical documents: littelfuse.com/L50QS Soft Starters 1 of 12 littelfuse.com 2017 Littelfuse POWR-GARD Products Rev: 110317 POWR-SPEED Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Electrical Specifications TOTAL TOTAL WATTS LOSS WATTS LOSS VOLTAGE INTERRUPT MELTING CLEARING CLEARING AT 80% RATED AT 100% RATED CATALOG RATING RATING 2 2 2 2 (PRE-ARC) I T (A s) I T (A s) CURRENT CURRENT NUMBER 2 2 I T (A s) AC DC AC DC 200 kA 500 Vac 50 kA 500 Vdc (W) (W) L50QS035 35 500 500 200kA 50kA 111 430 290 3 5 L50QS040 40 500 500 200kA 50kA 137 530 363 3 9 L50QS050 50 500 500 200kA 50kA 211 770 516 5 8 L50QS060 60 500 500 200kA 50kA 269 1,500 881 5 9 L50QS070 70 500 500 200kA 50kA 393 1,775 1,185 6 11 L50QS080 80 500 500 200kA 50kA 616 3,550 1,720 6 11 L50QS090 90 500 500 200kA 50kA 720 4,075 1,990 8 14 L50QS100 100 500 500 200kA 50kA 905 4,577 2,313 9 17 L50QS125 125 500 500 200kA 50kA 1,503 7,655 4,815 10 17 L50QS150 150 500 500 200kA 50kA 2,382 11,100 7,190 12 21 L50QS175 175 500 500 200kA 50kA 3,148 16,500 9,900 14 25 L50QS200 200 500 500 200kA 50kA 4,102 18,233 11,567 17 32 L50QS225 225 500 500 200kA 50kA 5,379 25,300 16,700 19 35 L50QS250 250 500 500 200kA 50kA 7,094 31,350 22,500 20 37 L50QS275 275 500 500 200kA 50kA 9,655 40,175 30,177 21 39 L50QS300 300 500 500 200kA 50kA 11,240 53,800 36,150 25 46 L50QS325 325 500 500 200kA 50kA 13,183 56,250 41,000 27 51 L50QS350 350 500 500 200kA 50kA 14,246 68,850 44,800 30 61 L50QS400 400 500 500 200kA 50kA 21,155 100,300 67,300 33 65 L50QS450 450 500 500 200kA 50kA 26,425 121,000 84,650 35 63 L50QS500 500 500 500 200kA 50kA 31,747 141,000 103,500 39 72 L50QS600 600 500 500 200kA 50kA 43,922 193,500 128,000 49 92 L50QS700 700 500 500 200kA 50kA 75,597 314,000 230,000 51 92 L50QS800 800 500 500 200kA 50kA 92,717 393,500 280,000 63 117 2 of 12 littelfuse.com 2017 Littelfuse POWR-GARD Products Rev: 110317 AMPERAGE RATING