POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES HF 500 Vac/dc • 35-800 A • Traditional Round Body Bolted Style Specifications Voltage Rating AC: 500V DC: 500V 35 - 800 A AC: 200 kA DC: 50 kA 10ms Body: Melamine Caps: Copper Alloy (Silver Plated) UL Recognized (E71611) c-UR-us (E71611) RoHS Compliant, REACH Mexico -55C to +125C Up to 35C with Relative Humidity <65% Amperage Rating Interrupting Rating Time Constant Material Approvals Environmental Country of Origin Operating Temperature Storage Temperature Description 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. Part Numbering System 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. Series L50 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. QS 500 X Package Quantity Body Type X = 1 (450 - 800A) V = 5 (125 - 400A) T = 10 (35 - 100A) Ampere Code SERIES L50 BODY AMPERE TYPE CODE QS 500 PACKAGE QUANTITY CATALOG NUMBER ORDERING NUMBER 1 L50QS500 L50QS500.X Recommended Fuse Blocks LSCR001 (35-200A) LSCR002 (225-800A) 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 littelfuse.com 1 of 12 © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES CATALOG NUMBER AMPERAGE RATING Electrical Specifications VOLTAGE RATING INTERRUPT RATING AC DC AC MELTING (PRE-ARC) I2T (A2s) DC TOTAL CLEARING I2T (A2s) TOTAL CLEARING I2T (A2s) 200 kA @ 500 Vac 50 kA @ 500 Vdc WATTS LOSS WATTS LOSS AT 80% RATED AT 100% RATED CURRENT CURRENT (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 35 L50QS225 225 500 500 200kA 50kA 5,379 25,300 16,700 19 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 littelfuse.com 2 of 12 © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Ordering Information SERIES AMPERAGE RATING AMPERE CODE CATALOG NUMBER ORDERING NUMBER PACK QUANTITY UPC L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS L50QS 35 40 50 60 70 80 90 100 125 150 175 200 225 250 275 300 325 350 400 450 500 600 700 800 035 040 050 060 070 080 090 100 125 150 175 200 225 250 275 300 325 350 400 450 500 600 700 800 L50QS035 L50QS040 L50QS050 L50QS060 L50QS070 L50QS080 L50QS090 L50QS100 L50QS125 L50QS150 L50QS175 L50QS200 L50QS225 L50QS250 L50QS275 L50QS300 L50QS325 L50QS350 L50QS400 L50QS450 L50QS500 L50QS600 L50QS700 L50QS800 L50QS035.T L50QS040.T L50QS050.T L50QS060.T L50QS070.T L50QS080.T L50QS090.T L50QS100.T L50QS125.V L50QS150.V L50QS175.V L50QS200.V L50QS225.V L50QS250.V L50QS275.V L50QS300.V L50QS325.V L50QS350.V L50QS400.V L50QS450.X L50QS500.X L50QS600.X L50QS700.X L50QS800.X 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 10 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 5 Pcs/ Box 1 Pc/ Box 1 Pc/ Box 1 Pc/ Box 1 Pc/ Box 1 Pc/ Box 07945885991 07945885992 07945885993 07945885994 07945885995 07945885996 07945885997 07945885998 07945885999 07945886000 07945886001 07945886002 07945886003 07945886004 07945886005 07945886006 07945886011 07945886007 07945886008 07945886009 07945886010 07945886012 07945886013 07945886014 littelfuse.com 3 of 12 © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Dimensions Millimeters [inches] Document Number: OL-L50QS000 25.27 [0.995] 10.41 [0.410] 22.73 [0.895] 17.02 [0.670] 8.73 [0.344] 8.74 [0.344] 92.08 [3.625] 110.31 [4.343] 92.08 [3.625] 76.19 [2.999] 53.98 [2.125] 65.07 [2.562] 87.37 [3.440] 73.86 [2.908] 70.32 [2.768] 35-100A 225-400A 125-200A 3.18 [0.125] 6.35 [0.250] 4.75 [0.187] ∅ 25.40 ∅ 38.10 [1.500] ∅ 30.94 [1.000] [1.218] Stud Size: M8 (5/16”) Recommended Torque: 15 Nm (132.76 in-lb) 53.16 [2.093] 69.83 [2.749] 53.98 [2.125] Stud Size: M8 (5/16”) Recommended Torque: 15 Nm (132.76 in-lb) Stud Size: M8 (5/16”) Recommended Torque: 15 Nm (132.76 in-lb) 50.80 [2.000] 13.46 [0.530] 38.10 [1.500] 10.41 [0.410] 157.15 [6.187] 126.93 [4.997] 113.49 [4.468] 87.30 [3.437] 92.82 [3.654] 56.34 [2.218] 70.86 [2.790] 700-800A 450-600A 6.35 [0.250] 9.53 [0.375] ∅ 50.80 [2.000] ∅ 63.50 [2.500] Stud Size: M8 (5/16”) Recommended Torque: 15 Nm (132.76 in-lb) littelfuse.com 56.34 [2.218] Stud Size: M12 (1/2”) Recommended Torque: 54 Nm (477.94 in-lb) 4 of 12 © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Time Current Curve 40000 50000 60000 70000 80000 90000 100000 30000 20000 4000 5000 6000 7000 8000 9000 10000 3000 2000 400 500 600 700 800 900 1000 300 200 40 50 60 70 80 90 100 30 20 4 5 6 7 8 9 10 3 2 100 90 80 70 60 50 40 100 90 80 70 60 50 40 30 30 20 20 10 9 8 7 6 5 4 10 9 8 7 6 5 4 3 3 2 2 - 60A 1 0.9 0.8 0.7 0.6 0.5 04 0.4 1 0.9 0.8 0.7 0.6 0.5 04 0.4 - 50A - 40A - 35A 0.3 0.3 0.0003 0 0003 0.0002 0.0002 0.0001 0.0001 40000 50000 60000 70000 80000 90000 100000 0.0003 0 0003 30000 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 20000 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 4000 5000 6000 7000 8000 9000 10000 0.002 3000 0.003 0.002 2000 0.003 400 500 600 700 800 900 1000 0.01 0.009 0.008 0.007 0.006 0.005 0.004 300 0.01 0.009 0.008 0.007 0.006 0.005 0.004 200 0.02 40 50 60 70 80 90 100 0.03 0.02 30 0.03 20 0.1 0.09 0.08 0.07 0.06 0.05 0.04 4 5 6 7 8 9 10 0.1 0.09 0.08 0.07 0.06 0.05 0.04 3 0.2 2 0.2 1 MELTING (PR RE‐ARCING) TIME IN SEC CONDS 1 L50QS Series PROSPECTIVE R.M.S CURRENT IN AMPERE TEST VOLTAGE: 500V TIME CONSTANT/POWER FACTOR: L50QS 35A - 800A BASIS FOR DATA: littelfuse.com FUSE CATALOG NUMBER: LITTELFUSE, INC. CHICAGO, IL. USA 5 of 12 DRAWN BY: LLL DATE: 10/14/2015 REVISION: A DRAWING NO.: © 2017 Littelfuse POWR-GARD® Products Rev: 110317 SHEET 2 OF 4 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Time Current Curve 200000 60000 70000 80000 90000 100000 50000 40000 30000 20000 6000 7000 8000 9000 10000 5000 4000 3000 2000 600 700 800 900 1000 500 400 300 200 100 L50QS Series 100 90 80 70 60 50 40 100 90 80 70 60 50 40 30 30 20 20 - 600A - 500A 10 9 8 7 6 5 4 10 9 8 7 6 5 4 - 450A 3 3 2 - 200A - 175A 1 0.9 0.8 0.7 0.6 0.5 0.4 1 0.9 0.8 0.7 0.6 0.5 0.4 - 150A - 125A 0.0003 0.0003 0.0002 0.0002 0.0001 0.0001 200000 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 60000 70000 80000 90000 100000 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 50000 0.002 40000 0 003 0.003 0.002 30000 0 003 0.003 20000 0.01 0.009 0.008 0.007 0.006 0.005 0.004 6000 7000 8000 9000 10000 0.01 0.009 0.008 0.007 0.006 0.005 0.004 5000 0.02 4000 0.03 0.02 3000 0.03 2000 0.1 0.09 0.08 0.07 0.06 0.05 0.04 600 700 800 900 1000 0.1 0.09 0.08 0.07 0.06 0.05 0.04 500 0.2 400 0.2 300 0.3 200 0.3 100 MELTING (PR RE‐ARCING) TIME IN SEC CONDS 2 PROSPECTIVE R.M.S CURRENT IN AMPERE TEST VOLTAGE: 500V TIME CONSTANT/POWER FACTOR: L50QS 35A - 800A BASIS FOR DATA: littelfuse.com FUSE CATALOG NUMBER: LITTELFUSE, INC. CHICAGO, IL. USA 6 of 12 DRAWN BY: LLL DATE: 10/14/2015 REVISION: A © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Time Current Curve 100 90 80 70 60 50 40 200000 60000 70000 80000 90000 100000 50000 40000 30000 20000 6000 7000 8000 9000 10000 5000 4000 3000 2000 600 700 800 900 1000 500 400 300 200 100 L50QS Series 100 90 80 70 60 50 40 - 800A 30 30 - 700A 20 20 - 400A - 350A 10 9 8 7 6 5 4 - 300A - 275A 3 3 - 250A 2 1 0.9 0.8 0.7 0.6 0.5 0.4 - 225A 2 - 100A 1 0.9 0.8 0.7 0.6 0.5 0.4 - 90A - 80A - 70A 0.3 0.3 0.2 0.2 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.03 0.02 0.02 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0 003 0.003 0 003 0.003 0.002 0.002 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 0.001 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 200000 60000 70000 80000 90000 100000 50000 40000 30000 20000 6000 7000 8000 9000 10000 5000 4000 3000 2000 600 700 800 900 1000 500 0.0001 400 0.0001 300 0.0003 0.0002 200 0.0003 0.0002 100 MELTING (PRE‐ARCING) TIME IN SEC CONDS 10 9 8 7 6 5 4 - 325A PROSPECTIVE R.M.S CURRENT IN AMPERE TEST VOLTAGE: 500V TIME CONSTANT/POWER FACTOR: L50QS 35A - 800A BASIS FOR DATA: littelfuse.com FUSE CATALOG NUMBER: LITTELFUSE, INC. CHICAGO, IL. USA 7 of 12 DRAWN BY: LLL DATE: 10/14/2015 REVISION: A DRAWING NO.: © 2017 Littelfuse POWR-GARD® Products Rev: 110317 SHEET 4 OF 4 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Peak Let-Thru Curve 200,000 60,000 70,000 80,000 90,000 100,000 50,000 40,000 30,000 20,000 6,000 7,000 8,000 9,000 10,000 5,000 4,000 3,000 2,000 600 700 800 900 1,000 500 400 300 200 100 L50QS Series 100,000 90,000 100,000 90,000 80,000 80,000 70,000 70,000 800A - 60,000 50,000 60,000 50,000 600A - 40,000 40,000 400A - 30,000 30,000 200A 100A - 20,000 60A - 10,000 9,000 8,000 10,000 9,000 8,000 7,000 7,000 6,000 6,000 5,000 5,000 4,000 4,000 3,000 3,000 2,000 2,000 1,000 900 800 1,000 900 800 200,000 60,000 70,000 80,000 90,000 100,000 50,000 20,000 40,000 100 30,000 100 6,000 7,000 8,000 9,000 10,000 200 5,000 200 4,000 300 3,000 300 2,000 400 600 700 800 900 1,000 400 500 500 400 600 500 300 700 600 200 700 100 PEAK LET- THRU IN AMPERES 20,000 AVAILABLE FAULT CURRENT SYMMETRICAL R.M.S. AMPERES TEST VOLTAGE: littelfuse.com BASIS FOR DATA: TIME CONSTANT/POWER FACTOR: 8 of 12 FUSE CATALOG NUMBER: © 2017 Littelfuse POWR-GARD® Products L50QS 60A - 800A DRAWN BY: LLL Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Temperature De-rating Curve (Temperature of Air Immediately Surrounding Fuse) L50QS Series PERCENT OF UPRATING 30% 20% 10% 0 0 10% 30% 40% PERCENT OF DOWNRATING 20% 50% -60°C -76°F -40°C -40°F -20°C -4°F 0°C 32°F 20°C 68°F 40°C 104°F 60°C 140°F 80°C 176°F 100°C 212°F 120°C 248°F 140°C 284°F AMBIENT TEMPERATURE TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: L50QS Series BASIS FOR DATA: LITTELFUSE, INC. littelfuse.com CHICAGO, IL. USA 9 of 12 TEMPERATURE RE-RATING CURVE DRAWN BY: LLL 08/14/2017 DATE: A REVISION: DRAWING NO.: © 2017 Littelfuse POWR-GARD® Products SHEET 2 OF 2 FCC11-L50QS Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Total Clearing I2t Correction Factor Curve L50QS Series 500 400 300 200 100 TOTAL CLEARING I2T CORRECTION FA ACTOR 1 1 0.9 0.9 0.8 0.8 0.7 0.7 0.6 0.6 0.5 0.5 0.4 0.4 - 35A - 800A 0.3 0.3 0.2 0.2 0.1 0.1 500 400 300 200 100 OPERATING VOLTAGE IN VOLT TEST VOLTAGE: 100V - 500V TIME CONSTANT/POWER FACTOR: L50S 35A 35-800A L50QS - 800A BASIS FOR DATA: littelfuse.com FUSE CATALOG NUMBER: LITTELFUSE, INC. CHICAGO, IL. USA 10 of 12 DRAWN BY: LLL DATE: 01/26/2015 10/30/2015 REVISION: A © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Watts Loss Correction Factor Curve L50QS Series 100 90 80 70 60 50 40 30 WATTS LO OSS CORRECTION FACTTOR 1 1 0.9 0.9 0.8 0.8 0.7 0.7 0.6 0.6 0.5 0.5 0.4 0.4 - 35A - 800A 0.3 0.3 0.2 0.2 0.1 0.1 100 90 80 70 60 50 40 30 PERCENT OF RATED CURRENT (%) TEST VOLTAGE: 500V TIME CONSTANT/POWER FACTOR: L50S 35-800A L50QS 35A-800A BASIS FOR DATA: littelfuse.com FUSE CATALOG NUMBER: LITTELFUSE, INC. CHICAGO, IL. USA 11 of 12 DRAWN BY: LLL DATE: 01/26/2015 10/30/2015 REVISION: A © 2017 Littelfuse POWR-GARD® Products Rev: 110317 POWR-SPEED™ Fuse Datasheet L50QS SERIES HIGH-SPEED ROUND BODY FUSES Peak Arc Voltage Curve L50QS Series PEAK ARC VOLTAGE IN VOLTT 500 400 300 200 100 1000 1000 900 900 800 800 700 700 600 600 500 500 400 400 300 300 200 200 100 100 500 400 300 200 100 OPERATING VOLTAGE IN VOLTS TEST VOLTAGE: 100V-500V TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: L70S 35A 35-800A - 800A BASIS FOR DATA: Disclaimer Notice - Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation,L50QS 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 BY: granted LLL injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.DRAWN Warranties 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 orDATE: damages arising out of products used in applications not expressly intended by 01/26/2015 10/30/2015 IL. USA Littelfuse as set forth in applicable Littelfuse documentation.CHICAGO, The sale and use of Littelfuse products is subject to Littelfuse Terms and REVISION: A Conditions of Sale, unless otherwise agreed by Littelfuse. Littelfuse.com/Product-Disclaimer DRAWING NO.: SHEET 2 3 OF 2 3 LITTELFUSE, INC. MAX ARC VOLTAGE ARC VOLTAGE VARIATION CURVE littelfuse.com 12 of 12 - THIS DATA IS GENERATED IN EXCEL - FCC09-L50QS FCC0- © 2017 Littelfuse POWR-GARD® Products Rev: 110317