L L 1 1 L High accuracy, SMD chip type thermistor KT Thermistor The KT series SMD thermistor features high accuracy with tight resistance and B-value tolerances of 1%, high performance, high reliability and complies with EIAJ standards (dimensions: 1005, 1608). Product number explanation Dimensions Fig. 1 Glass coating 103 KT 1608T R tolerance 1P: 1% Tin plated electrodes 2P: 2% T 3P: 3% Size according to EIAJ standard: See Fig. 1 High accuracy SMD chip thermistor Rated zero-power resistance at 25 E.g.: 103 = 10 x 10 Size Size L (mm) W (mm) T (mm) L (mm) 1 (Metric / EIAJ) (Imperial) 1005 0402 1.00 0.15 0.50 0.10 0.6 max. 0.15 to 0.30 Applications 1608 0603 1.60 0.15 0.80 0.15 0.95 max 0.20 to 0.50 Office automation equipment, communication equipment, IT equipment, Unit: mm mobile devices, battery packs, battery chargers, LCDs, hybrid ICs, AV equipment Specifications Dissipation factor Thermal time Rated power at Operating temperature Product number R R tolerance value 3 25 25 (mw / ) constant (s) 25 (mW) range () 103KT1608T 10 3435 1 1 503KT1608T 50 4055 1 approx. 0.9 approx. 5 4.5 2% 40 to 125 104KT1608T 100 4390 1 3% 103KT1005T 10 3435 1 approx. 0.7 approx. 2.2 3.5 1 2 : Rated zero-power resistance at 25 : B value calculated from rated zero-power resistance at 25 and 85 3 : Time required to reach 63.2% of temperature difference. Measured with sensor suspended in mid-air. Reliability data Caution Before and after soldering always make sure the circuit Item Test conditions Criteria board is not bent or warped. Resistance to soldering heat 10 s at 260 (wave soldering) R, B 3% 5 s at 235 The size of the soldering pad should be the same for More than 75% Solderability Flux material: Rosin 25%, ethyl alcohol soldered both the left and the right side. 75% After mounting the thermistor body is Electrode connection strength vs. pushed horizontally with a jig with a force circuit board (horizontal) of 5 N for 10 s. After mounting the circuit board is bent R, B 3% and Electrode connection strength vs. from the back side to a maximum of 2 mm visual inspection circuit board (vertical) for 5 s. A force of 10 N is applied vertically with a Strength of NTC body jig for 10 s. Dry heat 1000 hours at 125 Damp heat 1000 hours at 40 and 90% humidity 50 cycles as below: R, B 3% 1. - 25 for 30 minutes Temperature cycle 2. Room temperature for 15 minutes (thermal shock) 3. 100 for 30 minutes 4. Room temperature for 15 minutes Recommended temperature profile for wave soldering Recommended soldering pad size Soldering 260 5 Cooling period A B C 220 5 Preheating (in mid-air) 60 190 15 Size (EIAJ) A B C D 1005 0.6 0.5 0.6 0.6 1608 1.0 1.0 1.0 1.2 Unit: mm 120 30 10 max. 120 1 to 2 / s Time (s) 16 W Temperature () D Resistance / temperature characteristics Product number Temperature () 103KT1608T 503KT1608T 104KT1608T 103KT1005T - 40 221.9 1920 5218 223.9 - 30 125.1 981.8 2530 126.1 - 20 73.38 525.2 1285 73.87 - 10 44.72 293.3 682.0 44.91 0 28.16 169.7 376.8 28.22 10 18.25 101.7 216.1 18.27 20 12.14 62.90 128.3 12.15 25 10.00 50.00 100.0 10.00 30 8.283 40.05 78.55 8.282 40 5.781 26.20 49.56 5.778 50 4.120 17.56 32.13 4.119 60 2.996 12.04 21.36 2.992 70 2.214 8.431 14.53 2.212 80 1.665 6.021 10.10 1.664 85 1.451 5.122 8.487 1.451 90 1.271 4.376 7.164 1.271 100 0.9832 3.237 5.176 0.9840 110 0.7707 2.433 3.803 0.7710 120 0.6114 1.855 2.839 0.6115 125 0.5469 1.627 2.466 0.5470 B 3435 K 4055 K 4390 K 3435 K 25/85 Unit: k Taping dimensions 1608: 4.000 pcs / reel 1005: 10.000 pcs / reel 0.1 0.1 1.5 1.5 0 4.0 0.1 0 2.0 0.05 4.0 0.1 0.6 max. 1.0 0.1 0.75 0.02 0.9 max 0.66 0.03 1.2 max. 2.0 0.05 2.0 0.10 4.0 0.1 0.6 0.10 Unit: k 17 1.85 0.1 3.5 0.05 1.75 0.1 8.0 0.3 1.10 0.10 3.5 0.05 1.75 0.1 8.0 0.3