1733 Reader's Spreads pg1-203:document 1/27/09 4:11 PM Page 146 LT73 linear positive tempco thermistor EU features circuit protection • • • • • Anti-leaching nickel barrier terminations Twenty-five specifiable temperature characteristics SMD thin film resistor with thermo-perceptivity Marking: Black four-digit on bronze body color Products with lead-free terminations meet EU RoHS and China RoHS requirements dimensions and construction L c Type c W Solder Plating Ni Plating t d Protective Coating L (Inch Size Code) Dimensions inches (mm) W c d 2A (0805) .079±.008 .049±.008 .016±.008 (2.0±0.2) (1.25±0.2) (0.4±0.2) 2B (1206) .126±.008 .063±.008 (1.6±0.2) (3.2±0.2) .02±.008 (0.5±0.3) .012 +.008 -.004 (0.3 +0.2 -0.1 ) .016 (0.4 +.008 -.004 +0.2 ) -0.1 t .02±.004 (0.5±0.1) .024±.004 (0.6±0.1) Resistive Inner Electrode Film Ceramic Substrate ordering information New Part # LT73 Type 2B T Size Code 2A: 0805 2B: 1206 Termination Material T: Sn (Other termination styles available, contact factory for options) TD Packaging TD: 7" paper taping (5,000 pieces/reel) TE: 7" embossed plastic (4,000 pieces/reel) 101 Resistance Value 2 significant figures + 1 multiplier J 1000 Tolerance T.C.R. G: ±2% J: ±5% For further information on packaging, please refer to Appendix A. Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 148 11/20/08 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 1733 Reader's Spreads pg1-203:document 1/27/09 4:11 PM Page 147 PMS 300 neg. Black neg. LT73 linear positive tempco thermistor applications and ratings LT732A Absolute Maximum Working Voltage 100mW 50V Absolute Operating Maximum Temp. Overload Range Voltage 100V -40°C to +125°C LT732B 125mW 75V 150V Resistance Range E-24* Resistance Tolerance LT732A LT732B 2KΩ - 24KΩ 1KΩ - 20KΩ 1KΩ - 13KΩ 510Ω - 4.7KΩ 510Ω - 4.7KΩ 510Ω - 3.0KΩ 510Ω - 3.0KΩ 510Ω - 3.0KΩ 100Ω - 1KΩ 51Ω - 510Ω 2KΩ - 51KΩ 1KΩ - 43KΩ 1KΩ - 27KΩ 1KΩ - 10KΩ 510Ω - 9.1KΩ 510Ω - 6.2KΩ 510Ω - 6.2KΩ 510Ω - 6.2KΩ 100Ω - 2KΩ 51Ω - 510Ω G: ±2% T.C.R. (ppm/°C)** T.C.R. Tolerance 150, 250, 350, 450, 500 ±100ppm/°C 600, 700, 800, 900 ±150ppm/°C 1000, 1200, 1400 ±15% 1600, 1800 2000, 2200, 2400 2600, 2800 3000, 3300, 3600 ±10% 3900 4200 4500 J: ±5% * See Appendix D for available decade values. ** T.C.R. is factory tested from 25°C to 75°C. environmental applications Examples of Temperature Characteristics of Resistance Resistance Changing Rate (∆R) Derating Curve 100 % Rated Power 80 60 40 20 0 -40 -20 0 20 40 60 80 70 Ambient Temperature (°C) 100 120 140 125 60 50 4500ppm/°C 40 3300ppm/°C 30 2400ppm/°C 20 1600ppm/°C 10 0 -10 -20 -30 -50 -25 0 25 50 75 100 125 Ambient Temperature (°C) Approximate Expression for Resistance-Temperature Characteristics T.C.R. (x10-6/K) C0 C1 3000 3300 3600 3900 4200 4500 0.934 0.927 0.921 0.915 0.909 0.903 0.00258 0.00282 0.00306 0.00330 0.00353 0.00377 C2 2.77 3.17 3.58 4.00 4.44 4.89 x x x x x x 10-6 10-6 10-6 10-6 10-6 10-6 Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Resistance to Solder Heat Rapid Change of Temperature Moisture Resistance Endurance at 70°C Low Temperature Exposure High Temperature Exposure Requirement ∆ R ±(% + 0.05Ω) Limit Typical Within specified — tolerance Within specified — T.C.R. ±1.0% ±0.23% ±1.0% ±0.1% ±1.0% ±0.1% ±3.0% ±0.54% ±3.0% ±0.62% — ±0.05% (Ref) ±0.6% (Ref) — Test Method 25°C +25°C/+75°C Rated voltage x 2.5 or maximum overload volume for 5 seconds, whichever is lower 260°C ± 5°C, 10 seconds ± 1 second -40°C (30 minutes)/ +125°C (30 minutes), 5 cycles 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle -40°C, 45 minutes +125°C, 1000 hours Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/31/08 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 149 circuit protection Power Rating @ 70°C Part Designation