KOA SPEER ELECTRONICS, INC. SS-250 R4 AHA 5/01/08 Thick Film Linear Positive Tempco Thermistor LA73 Type CERTIFIED CERTIFIED 1. Features ■ Anti-leaching nickel barrier terminations ■ Marking: Black three-digit on orange body color ■ Twenty-five specifiable temperature characteristics ■ Products with lead-free terminations meet EU-RoHS requirements. Pb located in glass material, electrode and resistor element is exempt per Annex 1, exemption 5 of EU directive 2005/95/EC 2. Dimensions L c Table 1 c W t d Part L 1J (0603) 0.063±0.008 (1.6±0.2) 0.031±0.004 (0.8±0.1) 2A (0805) 0.079±0.008 (2.0±0.2) 2B (1206) 0.126±0.008 (3.2±0.2) Solder Plating Ni Plating Protective Coating Resistive Inner Film Electrode Ceramic Substrate Dimensions - inches (mm) W c d t 0.012±0.004 (0.3±0.1) 0.012±0.004 (0.3±0.1) 0.02±0.004 (0.5±0.1) 0.049±0.004 (1.25±0.1) 0.016±0.008 (0.4±0.2) +0.008 0.012±... .. -0.004 +0.2 (0.3± -0.1 ) 0.02±0.004 (0.5±0.1) 0.063±0.008 (1.6±0.2) 0.02±0.008 (0.5±0.3) +0.008 0.016±... .. -0.004 +0.2 (0.4± -0.1 ) 0.024±0.004 (0.6±0.1) 3. Type Designation The type designation shall be in the following form: LA73 Type 1J T TD 101 J 3300 Size Code Termination Material Packaging Resistance Value Tolerance T.C.R. 1J: 0603 2A: 0805 2B: 1206 T: Sn (Other termination styles available, contact factory for options) TP: 7" Embossed Plastic 2mm pitch TD: 7" paper (5,000 pieces/reel) 2 significant figures + 1 multiplier J: ±5% PAGE 1 OF 4 Bolivar Drive ■ P.O. Box 547 ■ Bradford, PA 16701 ■ USA ■ 814-362-5536 ■ Fax 814-362-8883 ■ www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. KOA SPEER ELECTRONICS, INC. SS-250 R4 4. Standard Applications Table 1 Part Designation Thermal Dissipation Constant (mW/°C) LA731J 7.6 LA732A 8.2 LA732B 9.0 Rated Ambient Temp. Operating Temp. Range +70°C -55°C to +125°C Table 2 Resistance Range E-12 LA731J LA732A LA732B 1KΩ - 10KΩ 680Ω - 6.8KΩ 470Ω - 4.7KΩ 470Ω - 3.9KΩ 330Ω - 2.7KΩ 330Ω - 2.7KΩ 220Ω - 1.8KΩ 100Ω - 1.2KΩ 100Ω - 1.2KΩ 100Ω - 390Ω 68Ω - 220Ω 33Ω - 120Ω 22Ω - 82Ω 1KΩ - 10KΩ 680Ω - 6.8KΩ 470Ω - 4.7KΩ 470Ω - 3.9KΩ 330Ω - 2.7KΩ 330Ω - 2.7KΩ 220Ω - 1.8KΩ 100Ω - 1.2KΩ 100Ω - 1.2KΩ 100Ω - 390Ω 68Ω - 220Ω 33Ω - 120Ω 22Ω - 82Ω 1KΩ - 10KΩ 680Ω - 6.8KΩ 470Ω - 4.7KΩ 470Ω - 3.9KΩ 330Ω - 2.7KΩ 330Ω - 2.7KΩ 220Ω - 1.8KΩ 100Ω - 1.2KΩ 100Ω - 1.2KΩ 100Ω - 390Ω 68Ω - 220Ω 33Ω - 120Ω 22Ω - 82Ω Resistance Tolerance T.C.R. (ppm/°C) Max. J: ±5% 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3300 3600 T.C.R. Tolerance ±100ppm/°C ±5% PAGE 2 OF 4 Bolivar Drive ■ P.O. Box 547 ■ Bradford, PA 16701 ■ USA ■ 814-362-5536 ■ Fax 814-362-8883 ■ www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. KOA SPEER ELECTRONICS, INC. SS-250 R4 6. Environmental Applications 6.2 Temperature Characteristics Resistance Changing Rate (∆R) 6.1 Derating Curve 100 40 % Rated Power 80 60 40 3600ppm/∞C 30 3000ppm/∞C 20 2000ppm/∞C 10 1000ppm/∞C 0 -10 -20 20 -30 0 -60 -40 -55 -20 0 20 40 60 80 70 Ambient Temperature (∞C) -40 -75 100 120 140 125 -50 -25 0 25 50 75 Ambient Temperature (∞C) 100 125 7. Approximate Expression for Resistance-Temperature Characteristics T.C.R. (x10-6/K) C0 C1 C2 3000 3300 3600 0.926 0.918 0.910 0.00294 0.00325 0.00359 1.1 x 10-7 4.1 x 10-7 1.7 x 10-7 (Values are not guaranteed but typical) RT=R25 (C0+C1T+C2T2) RT: Resistance value at T°C R25: Resistance value at 25°C T: Ambient temperature (°C) C0, C1, C2: Constants 8. Characteristics Parameter Resistance T.C.R. Short Time Overload Requirement ∆ R Within regulated tolerance Within specified T.C.R. Test Method 25°C +25°C/+75°C Rated voltage x 2.5 or max. working voltage x 2 for 5 seconds, whichever is less 260°C ± 5°C, 10 seconds ± 1 second 235°C ± 5°C, 2 seconds ± 0.5 seconds Width of holding point 90mm, bending 3mm, 1 time -55°C (30 minutes), +125°C (30 minutes), 100 cycles 40°C ± 2°C, 90 - 95% RH, 1000 hours, rated voltage load 70°C ± 3°C, 1000 hours, rated voltage load ±(1.0% + 0.1Ω): 1J, 2A, 2B Resistance to Solder Heat Solderability Bending Test Temperature Cycling Moisture Resistance Load Life 95% coverage minimum ±(1.0% + 0.1Ω): 1J, 2A, 2B ±(3.0% + 0.1Ω): 1J, 2A, 2B PAGE 3 OF 4 Bolivar Drive ■ P.O. Box 547 ■ Bradford, PA 16701 ■ USA ■ 814-362-5536 ■ Fax 814-362-8883 ■ www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. KOA SPEER ELECTRONICS, INC. SS-250 R4 9. Packaging Specifications (Notes) Dotted lines are applicable to only "TP." Dimensions - inches (mm) Style A B W 2A 0.75±0.004 (1.9±0.1) 0.043±0.004 (1.1±0.1) 2B 0.94±0.008 (2.4±0.2) 0.065±0.008 (1.65±0.2) 1J 0.45±0.004 (1.15±0.1) 0.026±0.004 (0.65±0.1) P1 T1 0.024+0.008/-0 (0.6+0.2/-0) 0.16±0.004 (4.0±0.1) 0.31±0.008 (8.0±0.2) 0.03+0.008/-0 (0.75+0.2/-0) 0.78±0.002 (2.0±0.05) 0.018+0.004/-0 (0.45+0.1/-0) (Notes) Reel holes, shapes and design are examples Dimensions - inches (mm) Style Tape 2A Punched Carrier 2B TD øa B D ød 7±.078 (178±2) 2.36±.078 (60±2) 0.35±.059 (9±1.5) .83 (21) 1J PAGE 4 OF 4 Bolivar Drive ■ P.O. Box 547 ■ Bradford, PA 16701 ■ USA ■ 814-362-5536 ■ Fax 814-362-8883 ■ www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.