PSX

PSX LITTELFUSE | Alldatasheet

Document overview

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Technical content

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 1 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY Specifications Voltage Rating Dc: 1500 V Amperage Rating 80 A–1400 A Interrupting Rating Dc: 250 kA Time Constant 1XL: </= 3 ms 3XL: </= 5 ms Microswitch Yes Mounting Bolted-blade style, DIN-blade style, Metric flush-end style Material Body: ceramic Contacts: plated copper (bladed) plated brass (flush end) Approvals cURus Recognized (File: E71611) Applicable Standards UL 248-13, IEC 60269-7 Environmental RoHS Compliant, REACH Operating Temperature -55 °C to +125 °C Storage Temperature Up to +35 °C with relative humidity <65 % Country of Origin Mexico Ordering Part Number PSX 3XL UB 1400 X Termination UB = bolted blade DB = DIN blade FL = flush-metric Case Size 1XL, 3XL Series Packing Quantity X = (1 pc/box) Amperage Catalog Number SERIES CASE SIZE TERMINATION AMPERAGE CATALOG NUMBER ORDERING PART NUMBER PSX 3XL UB 1400 PSX3XLUB1400 PSX3XLUB1400X Recommended Accessories Microswitch: MSXL2000C Web Resources Download technical documents: Littelfuse.com/PSX Battery Protection Fuses • 1500 V Dc Class aBat • 80 A–1400 A

Description

Littelfuse PSX series 1500 V dc high-speed square body fuses are specially designed to protect battery energy storage systems (BESS), photovoltaic inverters, and many dc applications such as dc common bus systems, larger industrial regenerative drives, rectifiers and metal processing equipment. The PSX series fuses are extremely fast-acting, offering high-speed performance up to 1500 V dc, ranging from 80 A to 1400 A in the smallest NH XL package sizes. The PSX series is available with multiple mounting terminations including flush-end, DIN, and bolted-blade styles. Visual blown fuse indication is standard on all fuses and optional micro-switch is available for external indication. The PSX series is certified to UL248-13 and designed to meet IEC 60269-7 (Class aBat) battery protection fuse standard. Features/Benefits High dc voltage rating up to 1500 V dc Dc interrupting rating is 250 kA Extremely fast acting for high speed performance Low watt loss provides energy efficiency for BESS

applications

Compact NH 1XL and 3XL sizes offer flexibility Battery energy storage systems (BESSs) Power conversion systems Dc common bus systems Hybrid PV-BESS inverters Regenerative drives Industrial heaters and welding equipment Metal processing equipment

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 2 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY

Electrical Characteristics

Ordering Information

FLUSH METRIC (FL) BOLTED BLADE (UB) DIN BLADE (DB) BOX QUANTITYCATALOG NUMBER ORDERING PART NUMBER UPC CATALOG NUMBER ORDERING PART NUMBER UPC CATALOG NUMBER ORDERING PART NUMBER UPC NH 1XL PSX1XLFL0080 PSX1XLFL0080X 07945825798 PSX1XLUB0080 PSX1XLUB0080X 07945825819 PSX1XLDB0080 PSX1XLDB0080X 07945826320 1 pc/box PSX1XLFL0100 PSX1XLFL0100X 07945825799 PSX1XLUB0100 PSX1XLUB0100X 07945825820 PSX1XLDB0100 PSX1XLDB0100X 07945826321 1 pc/box PSX1XLFL0125 PSX1XLFL0125X 07945825800 PSX1XLUB0125 PSX1XLUB0125X 07945825821 PSX1XLDB0125 PSX1XLDB0125X 07945826322 1 pc/box PSX1XLFL0160 PSX1XLFL0160X 07945825801 PSX1XLUB0160 PSX1XLUB0160X 07945825822 PSX1XLDB0160 PSX1XLDB0160X 07945826323 1 pc/box PSX1XLFL0200 PSX1XLFL0200X 07945825802 PSX1XLUB0200 PSX1XLUB0200X 07945825823 PSX1XLDB0200 PSX1XLDB0200X 07945826324 1 pc/box PSX1XLFL0250 PSX1XLFL0250X 07945825803 PSX1XLUB0250 PSX1XLUB0250X 07945825824 PSX1XLDB0250 PSX1XLDB0250X 07945826325 1 pc/box PSX1XLFL0280 PSX1XLFL0280X 07945825804 PSX1XLUB0280 PSX1XLUB0280X 07945825825 PSX1XLDB0280 PSX1XLDB0280X 07945826326 1 pc/box PSX1XLFL0315 PSX1XLFL0315X 07945825805 PSX1XLUB0315 PSX1XLUB0315X 07945825826 PSX1XLDB0315 PSX1XLDB0315X 07945826327 1 pc/box PSX1XLFL0350 PSX1XLFL0350X 07945825806 PSX1XLUB0350 PSX1XLUB0350X 07945825827 PSX1XLDB0350 PSX1XLDB0350X 07945826328 1 pc/box PSX1XLFL0400 PSX1XLFL0400X 07945825807 PSX1XLUB0400 PSX1XLUB0400X 07945825828 PSX1XLDB0400 PSX1XLDB0400X 07945826329 1 pc/box PSX1XLFL0450 PSX1XLFL0450X 07945825808 PSX1XLUB0450 PSX1XLUB0450X 07945825829 PSX1XLDB0450 PSX1XLDB0450X 07945826330 1 pc/box PSX1XLFL0500 PSX1XLFL0500X 07945825809 PSX1XLUB0500 PSX1XLUB0500X 07945826310 PSX1XLDB0500 PSX1XLDB0500X 07945826331 1 pc/box PSX1XLFL0550 PSX1XLFL0550X 07945825810 PSX1XLUB0550 PSX1XLUB0550X 07945826311 PSX1XLDB0550 PSX1XLDB0550X 07945826332 1 pc/box PSX1XLFL0630 PSX1XLFL0630X 07945825811 PSX1XLUB0630 PSX1XLUB0630X 07945826312 PSX1XLDB0630 PSX1XLDB0630X 07945826333 1 pc/box NH 3XL PSX3XLFL0450 PSX3XLFL0450X 07945828641 PSX3XLUB0450 PSX3XLUB0450X 07945828645 PSX3XLDB0450 PSX3XLDB0450X 07945828649 1 pc/box PSX3XLFL0500 PSX3XLFL0500X 07945828642 PSX3XLUB0500 PSX3XLUB0500X 07945828646 PSX3XLDB0500 PSX3XLDB0500X 07945828650 1 pc/box PSX3XLFL0550 PSX3XLFL0550X 07945828643 PSX3XLUB0550 PSX3XLUB0550X 07945828647 PSX3XLDB0550 PSX3XLDB0550X 07945828651 1 pc/box PSX3XLFL0630 PSX3XLFL0630X 07945828644 PSX3XLUB0630 PSX3XLUB0630X 07945828648 PSX3XLDB0630 PSX3XLDB0630X 07945828652 1 pc/box PSX3XLFL0700 PSX3XLFL0700X 07945825812 PSX3XLUB0700 PSX3XLUB0700X 07945826313 PSX3XLDB0700 PSX3XLDB0700X 07945826334 1 pc/box PSX3XLFL0800 PSX3XLFL0800X 07945825813 PSX3XLUB0800 PSX3XLUB0800X 07945826314 PSX3XLDB0800 PSX3XLDB0800X 07945826335 1 pc/box PSX3XLFL0900 PSX3XLFL0900X 07945825814 PSX3XLUB0900 PSX3XLUB0900X 07945826315 PSX3XLDB0900 PSX3XLDB0900X 07945826336 1 pc/box PSX3XLFL1000 PSX3XLFL1000X 07945825815 PSX3XLUB1000 PSX3XLUB1000X 07945826316 PSX3XLDB1000 PSX3XLDB1000X 07945826337 1 pc/box PSX3XLFL1100 PSX3XLFL1100X 07945825816 PSX3XLUB1100 PSX3XLUB1100X 07945826317 PSX3XLDB1100 PSX3XLDB1100X 07945826338 1 pc/box PSX3XLFL1250 PSX3XLFL1250X 07945825817 PSX3XLUB1250 PSX3XLUB1250X 07945826318 PSX3XLDB1250 PSX3XLDB1250X 07945826339 1 pc/box PSX3XLFL1400 PSX3XLFL1400X 07945825818 PSX3XLUB1400 PSX3XLUB1400X 07945826319 PSX3XLDB1400 PSX3XLDB1400X 07945826340 1 pc/box CASE SIZE CATALOG NUMBER AMPERE RATING (A) VOLTAGE RATING (V) INTERRUPTING RATING MINIMUM BREAKING CAPACITY (A) MELTING (PRE-ARC) I2T (A2S) TOTAL CLEARING I2T (A2S) AT RATED VOLTAGE WATTS LOSS AT 100% RATED CURRENT (W) AGENCY CERTIFICATION FLUSH METRIC (FL) BOLTED BLADE (UB) DIN BLADE (DB) DC DC DC cURus NH 1XL PSX1XLFL0080 PSX1XLUB0080 PSX1XLDB0080 80 1500 250 kA 800 A 2048 8720 16.4 • PSX1XLFL0100 PSX1XLUB0100 PSX1XLDB0100 100 1500 250 kA 1000 A 3540 15485 19.1 • PSX1XLFL0125 PSX1XLUB0125 PSX1XLDB0125 125 1500 250 kA 1250 A 7091 35720 19.6 • PSX1XLFL0160 PSX1XLUB0160 PSX1XLDB0160 160 1500 250 kA 1600 A 13704 55490 24.6 • PSX1XLFL0200 PSX1XLUB0200 PSX1XLDB0200 200 1500 250 kA 2000 A 18016 77240 34.6 • PSX1XLFL0250 PSX1XLUB0250 PSX1XLDB0250 250 1500 250 kA 2500 A 36552 156450 38.5 • PSX1XLFL0280 PSX1XLUB0280 PSX1XLDB0280 280 1500 250 kA 2800 A 36552 156450 48.7 • PSX1XLFL0315 PSX1XLUB0315 PSX1XLDB0315 315 1500 250 kA 3150 A 56940 212400 53.6 • PSX1XLFL0350 PSX1XLUB0350 PSX1XLDB0350 350 1500 250 kA 3500 A 86623 332050 51.8 • PSX1XLFL0400 PSX1XLUB0400 PSX1XLDB0400 400 1500 250 kA 4000 A 116271 352600 64.4 • PSX1XLFL0450 PSX1XLUB0450 PSX1XLDB0450 450 1500 250 kA 6750 A 149336 540850 69.3 • PSX1XLFL0500 PSX1XLUB0500 PSX1XLDB0500 500 1500 250 kA 7500 A 250109 774600 71.5 • PSX1XLFL0550 PSX1XLUB0550 PSX1XLDB0550 550 1500 250 kA 8250 A 276650 924967 83.1 • PSX1XLFL0630 PSX1XLUB0630 PSX1XLDB0630 630 1500 250 kA 9450 A 276650 924967 127.3 • NH 3XL PSX3XLFL0450 PSX3XLUB0450 PSX3XLDB0450 450 1500 250 kA 4500 A 57143 194500 146.3 • PSX3XLFL0500 PSX3XLUB0500 PSX3XLDB0500 500 1500 250 kA 5000 A 98570 333900 132.5 • PSX3XLFL0550 PSX3XLUB0550 PSX3XLDB0550 550 1500 250 kA 5500 A 142790 451600 136.7 • PSX3XLFL0630 PSX3XLUB0630 PSX3XLDB0630 630 1500 250 kA 6300 A 205617 650304 150.9 • PSX3XLFL0700 PSX3XLUB0700 PSX3XLDB0700 700 1500 250 kA 7000 A 305720 1003650 164.5 • PSX3XLFL0800 PSX3XLUB0800 PSX3XLDB0800 800 1500 250 kA 8000 A 335493 1150000 209.6 • PSX3XLFL0900 PSX3XLUB0900 PSX3XLDB0900 900 1500 250 kA 9000 A 403262 1308500 266.9 • PSX3XLFL1000 PSX3XLUB1000 PSX3XLDB1000 1000 1500 250 kA 10000 A 484792 1791500 335.0 • PSX3XLFL1100 PSX3XLUB1100 PSX3XLDB1100 1100 1500 250 kA 11000 A 656719 2201250 341.0 • PSX3XLFL1250 PSX3XLUB1250 PSX3XLDB1250 1250 1500 250 kA 12500 A 995376 3003500 346.9 • PSX3XLFL1400 PSX3XLUB1400 PSX3XLDB1400 1400 1500 250 kA 14000 A 1395828 4228250 361.9 •

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 4 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY - THIS DATA IS GENERATED IN EXCEL - 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET TIME CURRENT CHARACTERISTIC CURVES LITTELFUSE, INC. CHICAGO, IL. USA

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C PROSPECTIVE R.M.S CURRENT IN AMPERE VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS - 80A - 100A - 125A - 160A - 200A - 250A - 315A - 350A - 400A Time Current Curve (1XL Case Size 80 A–400 A)

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 5 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY - THIS DATA IS GENERATED IN EXCEL - 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET TIME CURRENT CHARACTERISTIC CURVES LITTELFUSE, INC. CHICAGO, IL. USA

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C PROSPECTIVE R.M.S CURRENT IN AMPERE VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS - 450A - 500A - 630A Time Current Curve (1XL Case Size 450 A–630 A)

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 6 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY - THIS DATA IS GENERATED IN EXCEL - 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET TIME CURRENT CHARACTERISTIC CURVES LITTELFUSE, INC. CHICAGO, IL. USA

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C PROSPECTIVE R.M.S CURRENT IN AMPERE VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS - 280A - 550A Time Current Curve (1XL Case Size 280 A and 550 A)

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 7 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY- THIS DATA IS GENERATED IN EXCEL - 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 1009080 1098 10.90.8 0.7 0.6 0.5 0.4 0.3 0.2 0.10.090.08 0.07 0.06 0.05 0.04 0.03 0.02 0.010.0090.008 0.007 0.006 0.005 0.004 0.003 0.002 0.0010.00090.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 90000 80000 70000 60000 50000 40000 30000 20000 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 900 800 700 600 500 400 300 200 100 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET TIME CURRENT CHARACTERISTIC CURVES LITTELFUSE, INC. CHICAGO, IL. USA

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D PROSPECTIVE R.M.S CURRENT IN AMPERE VIRTUAL MELTING (PRE‐ARCING) TIME IN SECONDS - 800A - 900A - 1000A - 1100A - 1250A - 1400A - 700A - 500A - 550A - 630A - 450A Time Current Curve (3XL Case Size 450 A–1400 A)

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 8 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY - THIS DATA IS GENERATED IN EXCEL - 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1500 1400 1300 1200 1100 1000 900 800 700 600 500 1500 1400 1300 1200 1100 1000 900 800 700 600 500 1400 1200 1000 800 600 BASIS FOR DATA: TEST VOLTAGE: 500V - 1500V TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET I2T VARIATION CURVES LITTELFUSE, INC. CHICAGO, IL. USA A OPERATING VOLTAGE IN VOLTS TOTAL CLEARING I2t CORRECTION FACTOR T otal Clearing l2T Correction Factor Curve (1XL and 3XL)

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 9 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY Peak Arc Voltage Curve 1XL and 3XL - THIS DATA IS GENERATED IN EXCEL - 1200 1300 1400 1500 1600 1700 1800 1900 2000 500 600 700 800 900 1000 1100 1200 1300 1400 1500 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET ARC VOLTAGE LITTELFUSE, INC. CHICAGO, IL. USA LLL 01/26/2015 A

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OPERATING VOLTAGE IN VOLTS PEAK ARC VOLTAGE IN VOLT BASIS FOR DATA: TEST VOLTAGE: 500V-1500V TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET MAX ARC VOLTAGE VARIATION CURVE LITTELFUSE, INC. CHICAGO, IL. USA A

Littelfuse.com/PSX © 2022 Littelfuse, Inc. Rev: 041122 10 of 10 POWR-SPEED® Fuse PSX SERIES HIGH-SPEED SQUARE BODY - THIS DATA IS GENERATED IN EXCEL - BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET TEMPERATURE RE-RATING CURVE LITTELFUSE, INC. CHICAGO, IL. USA LLL 04/04/2017 A 20% 140°C 284°F 20% 120°C 248°F 80°C 176°F 40°C 104°F -20°C -4°F -40°C -40°F -60°C -76°F 40% 0°C 32°F 20°C 68°F 100°C 212°F 60°C 140°F PERCENT OF UPRATING AMBIENT TEMPERATURE 10% 30% 10% 30% 50% T emperature Derating Curve (temperature of air immediately surrounding fuse) - THIS DATA IS GENERATED IN EXCEL - 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 100 100 BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET I2T CORRECTION FACTOR LITTELFUSE, INC. CHICAGO, IL. USA LLL 01/26/2015 A PERCENT OF RATED CURRENT(%) WATTS LOSS CORRECTION FACTOR BASIS FOR DATA: TEST VOLTAGE: TIME CONSTANT/POWER FACTOR: FUSE CATALOG NUMBER: DRAWN BY: DATE: REVISION: DRAWING NO.: SHEET DERATING CURVE - WATTS LOSS CORRECTION LITTELFUSE, INC. CHICAGO, IL. USA LLL 03/20/2017 A Watts Loss Correction Factor Curve Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.