POLYFUSE(R) Resettable PTCs Surface Mount 1812L Series Description The 1812L series device provides surface mount overcurrent protection for applications where resettable protection is desired. Features Agency Approvals AGENCY * Low resistance * Low-profile * Compatible with high temperature solders * RoHS compliant and lead-free * Fast response to fault currents * Compact design saves board space AGENCY FILE NUMBER Applications E183209 * Plug and play protection for motherboards and peripherals * USB peripherals R50082521 * PCI cards * Game console port protection Electrical Characteristics Marking I hold (A) I trip (A) V max (Vdc) I max (A) Pd max. (W) 1812L010 LF010 0.10 0.30 30 100 1812L014 LF014 0.14 0.34 60 10 1812L020 LF020 0.20 0.40 30 1812L050-C LF050 0.50 1.00 1812L075-C LF075 0.75 1.50 1812L075/24 LF075-24 0.75 1.50 24 1812L075/33 LF075-33 0.75 1.50 1812L110-C LF110 1.10 2.20 1812L110/16 LF110-16 1.10 1812L110/33 LF110-33 1.10 1812L125-C LF125 1812L125/6 1812L150-C 1812L150/12 1812L150/24 1812L160-C Part Number www.littelfuse.com (c)2006 Littelfuse Maximum Time To Trip Agency Approvals Resistance Current (A) Time (Sec.) R min () R typ () R 1max () 0.8 0.50 1.50 1.600 7.000 15.000 X X 0.8 1.50 0.15 1.500 4.000 6.000 X X 100 0.8 8.00 0.02 0.800 2.900 5.000 X X 15 100 0.8 8.00 0.15 0.150 0.600 1.000 X X 13.2 100 0.8 8.00 0.20 0.100 0.260 0.450 X X 100 0.8 8.00 0.20 0.110 0.200 0.290 X X 33 20 0.8 8.00 0.20 0.110 0.260 0.400 X X 6 100 0.8 8.00 0.30 0.040 0.120 0.210 X X 1.95 16 100 0.8 8.00 0.50 0.060 0.120 0.180 X X 1.95 33 20 0.8 8.00 0.50 0.060 0.120 0.200 X X 1.25 2.50 15 100 0.8 8.00 0.40 0.050 0.160 0.250 X X LF125-6 1.25 2.50 6 100 0.8 8.00 0.40 0.050 0.090 0.140 X X LF150 1.50 3.00 8 100 0.8 8.00 0.30 0.040 0.070 0.110 X X LF150-12 1.50 3.00 12 100 0.8 8.00 0.50 0.040 0.070 0.110 X X LF150-24 1.50 3.00 24 20 0.8 8.00 1.50 0.040 0.070 0.120 X X LF160 1.60 2.80 8 100 0.8 8.00 1.00 0.030 0.066 0.100 X X 15 Electronics Designers Guide 1812L Series Specifications are subject to change without notice. POLYFUSE(R) Resettable PTCs Surface Mount Electrical Characteristics (continued) I trip (A) V max (Vdc) I max (A) Pd max. (W) Maximum Time To Trip Part Number Marking I hold (A) 1812L160/12 LF160-12 1.60 2.80 12 100 0.8 8.00 1812L200-C LF200 2.00 3.50 8 100 0.8 8.00 1812L260-C LF260 2.60 5.00 6 100 0.8 8.00 2.50 Current (A) Agency Approvals Resistance R min () R typ () R 1max () 1.00 0.030 0.066 0.100 X X 2.00 0.020 0.040 0.060 X X 0.015 0.030 0.047 X X Time (Sec.) I hold = Hold current: maximum current device will pass without tripping in 20C still air. R typ = Typical resistance of device in initial (un-soldered) state. I trip = Trip current: minimum current at which the device will trip in 20C still air. R 1max = Maximum resistance of device at 20C measured one hour after tripping or reflow soldering of 260C for 20 sec. V max = Maximum voltage device can withstand without damage at rated current (I max) Caution: Operation beyond the specified rating may result in damage and possible arcing and flame. I max = Maximum fault current device can withstand without damage at rated voltage (Vmax) P d = Power dissipated from device when in the tripped state at 20C still air. R min = Minimum resistance of device in initial (un-soldered) state. Temperature Rerating Ambient Operation Temperature -40C -20C 0C 23C 50C 60C 70C 85C 1812L010 0.16 0.14 0.12 0.10 1812L014 0.23 0.19 0.17 0.14 0.08 0.07 0.06 0.05 0.03 0.12 0.10 0.09 0.08 0.06 1812L020 0.29 0.26 0.23 1812L050-C 0.77 0.68 0.59 0.20 0.17 0.15 0.14 0.12 0.10 0.50 0.44 0.40 0.37 0.33 1812L075-C 1.15 1.01 0.29 0.88 0.75 0.65 0.60 0.55 0.49 1812L075/24 1.06 0.43 0.95 0.84 0.75 0.60 0.55 0.50 0.45 0.37 1812L075/33 1812L110-C 1.10 1.00 0.88 0.75 0.66 0.60 0.56 0.47 0.36 1.59 1.43 1.26 1.10 0.95 0.87 0.80 0.71 0.60 1812L110/16 1.58 1.43 1.27 1.10 0.95 0.85 0.77 0.71 0.58 1812L110/33 1.55 1.40 1.25 1.10 0.93 0.83 .073 .063 .050 1812L125-C 2.00 1.75 1.52 1.25 1.00 0.95 0.90 0.75 0.53 1812L125/6 2.00 1.75 1.52 1.25 1.00 0.95 0.90 0.75 0.53 1812L150-C 2.06 1.93 1.79 1.50 1.28 1.10 1.02 0.80 0.68 1812L150/12 2.04 1.88 1.68 1.50 1.25 1.10 1.00 0.80 0.60 1812L150/24 2.05 1.87 1.67 1.50 1.25 1.08 0.95 0.77 0.60 1812L160-C 2.20 2.06 1.91 1.60 1.36 1.17 1.09 0.85 0.72 1812L160/12 2.18 2.01 1.79 1.60 1.34 1.16 1.07 0.83 0.60 1812L200-C 3.08 2.71 2.35 2.00 1.80 1.60 1.50 1.07 0.80 1812L260-C 4.00 3.52 3.06 2.60 2.34 2.08 1.95 1.39 1.04 Part Number 40C Hold Current (A) 1812L Series Specifications are subject to change without notice. 16 Electronics Designers Guide www.littelfuse.com (c)2006 Littelfuse POLYFUSE(R) Resettable PTCs Surface Mount 1812L Series 0.500A Temperature Rerating Curve 0.750A/24V 0.750A 0.750A/33V 1.10A/16V 1.10A/33V 1.10A 1.25A 1.25A/6V 1.50A/12V 1.50A-/8V 1.50A/24V 1.60A/12V 1.60A 1.60A/8 2.00A 2.60A 0.100A 0.140A 0.200A Average Time Current Curves 100000 10000 TIME IN SECONDS 1000 100 10 1 0.100 0.010 0.001 0.02 0.100 1 10 100 CURRENT IN AMPERES Specifications are subject to change without notice. Note: 1.00 means the number one with two decimal places. AKL V3.9 06.05.10 The average time current curves and temperature rerating curve performance is affected by a number or variables, and these curves provided as guidance only. Customer must verify the performance in their application. www.littelfuse.com (c)2006 Littelfuse 17 Electronics Designers Guide 1812L Series Specifications are subject to change without notice. POLYFUSE(R) Resettable PTCs Surface Mount Soldering Parameters Condition Reflow Peak Temp/ Duration Time 260C / 10 Sec Time above liquids (TAL) 220C 60 Sec ~ 100 Sec Preheat 120C~ 180C 50 Sec ~ 150 Sec 0C~35C, < =70%RH Cooling 220 Temperature (C) Storage Condition Soldering 260 * Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment for lead-free * Devices are not designed to be wave soldered to the bottom side of the board. * Recommended maximum paste thickness is 0.25mm (0.010 inch) * Devices can be cleaned using standard industry methods and solvents. Note: If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements. 180 120 0 Preheating 50 to 150 60 to 100 120 Time(s) Physical Specifications Environmental Specifications Terminal Material Solder-Plated Copper (Solder Material: Matte Tin (Sn)) Operating/Storage Temperature -40C to +85C Lead Solderability Meets EIA Specification RS186-9E, ANSI/ J-STD-002 Category 3. Maximum Device Surface Temperature in Tripped State 125C Passive Aging +85C, 1000 hours 5% typical resistance change Humidity Aging +85C, 85%R.H. 1000 hours 5% typical resistance change Thermal Shock MIL-STD-202 Method 107G +85C/-40C 20 times -30% typical resistance change Solvent Resistance MIL-STD-202, Method 215 No change Vibration MIL-STD-883C, Method 2007.1, Condition A No change 1812L Series Specifications are subject to change without notice. 18 Electronics Designers Guide www.littelfuse.com (c)2006 Littelfuse POLYFUSE(R) Resettable PTCs Surface Mount Dimensions MARKING CODE VARIES WITH AMPERAGE AND VOLTAGE RATING (SEE CHART) SHOWN ARE: - 1.1A/6V RATING (LEFT) - 1.1A/33V RATING (RIGHT) C A Top View 110 Bottom View 110 110 -33 B 3.45 mm (.135") Pad Layout D E Side View 1.78mm (.070") A Part Number B Inches mm Inches D Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Min. Min Max. Min. Max. 1812L010 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65 1812L014 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.08 0.75 1.95 0.01 0.30 0.01 0.03 0.25 0.65 1812L020 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.04 0.55 1 0.01 0.30 0.01 0.03 0.25 0.65 1812L050-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.75 0.01 0.30 0.01 0.02 0.25 0.5 1812L075-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.75 0.01 0.30 0.01 0.02 0.25 0.5 1812L075/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.06 0.75 1.55 0.01 0.30 0.01 0.03 0.25 0.65 1812L075/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.06 0.75 1.55 0.01 0.30 0.01 0.03 0.25 0.65 1812L110-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.5 0.71 0.01 0.30 0.01 0.02 0.25 0.5 1812L110/16 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65 1812L110/33 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.05 0.08 1.2 2 0.01 0.30 0.01 0.03 0.25 0.65 1812L125-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.02 0.25 0.5 1812L125/6 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.45 0.75 0.01 0.30 0.01 0.03 0.25 0.65 1812L150-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.4 0.71 0.01 0.30 0.01 0.03 0.25 0.65 1812L150/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65 1812P150/24 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.07 0.8 1.8 0.01 0.30 0.01 0.03 0.25 0.65 1812L160-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.02 0.03 0.4 0.75 0.01 0.30 0.01 0.03 0.25 0.65 1812L160/12 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.75 1.25 0.01 0.30 0.01 0.03 0.25 0.65 1812L200-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.81 1.2 0.01 0.30 0.01 0.02 0.25 0.5 1812L260-C 0.17 0.19 4.37 4.73 0.12 0.13 3.07 3.41 0.03 0.05 0.8 1.34 0.01 0.30 0.01 0.02 0.25 0.5 19 Electronics Designers Guide mm E mm (c)2006 Littelfuse mm C Inches www.littelfuse.com Inches 3.15 mm (.124") Inches mm 1812L Series Specifications are subject to change without notice. POLYFUSE(R) Resettable PTCs Surface Mount Part Numbering System 1812 L 075 /33 D R PACKAGING STYLE R: Tape & Reel SERIES QUANTITY CODE: D=1500 M=1000 P=2000 /XX: SPECIAL VOLTAGE RATING (NOT APPLICABLE TO ALL PARTS) I HOLD CURRENT CODE (SEE TABLE BELOW) L: LITTELFUSE SURFACE MOUNT PPTC SIZE Packaging I hold (A) I hold Code 0.10 Packaging Option Quantity Quantity & Packaging Codes 010 Tape and Reel 1500 DR 0.14 014 Tape and Reel 1500 DR 0.20 020 Tape and Reel 2000 PR 0.50 050 Tape and Reel 2000 PR Tape and Reel 2000 PR /24 Tape and Reel 1500 DR /33 Tape and Reel 1500 DR Tape and Reel 2000 PR /16 Tape and Reel 1500 DR /33 Tape and Reel 1000 MR Tape and Reel 1500 DR Tape and Reel 2000 PR Tape and Reel 2000 ZR /12 Tape and Reel 1500 DR /24 Tape and Reel 1000 MR Tape and Reel 2000 PR /12 Tape and Reel 1500 DR 0.75 1.10 1.25 1.50 Voltage Option 075 110 125 150 /6 1.60 160 2.00 200 Tape and Reel 1500 DR 2.60 260 Tape and Reel 1000 ZR 1812L Series Specifications are subject to change without notice. 20 Electronics Designers Guide www.littelfuse.com (c)2006 Littelfuse