SNT Series NTC Thermistors (SMD Type) MERITEK RoHS FEATURES UL E223037 EIA size 0402, 0603, 0805, 1206 Highly reliable monolithic structure Wide resistance range Cost effective Agency recognition: UL PART NUMBERING SYSTEM SNT 01 A 901 F 39D F Meritek NTC Thermistor Product Series EIA Size Code Size 01 0201 02 0402 03 0603 05 0805 06 1206 Definition of B Value Code Type A B25/85 B B25/50 Zero Power Resistance at 25°C (R25) Code Value 901 900Ω 203 20KΩ 474 470KΩ Tolerance of R25 Code Value F ±1% G ±2% H ±3% J ±5% K ±10% B Value Code Value 374 3740 39D 3935 395 3950 39H 3975 520 5200 Tolerance of B value Code Value F ±1% G ±2% H ±3% DIMENSIONS Part No. Size L1 W H max. L2 & L3 SNT01 0201 0.60±0.05 0.30±0.05 0.35 0.15±0.05 SNT02 0402 1.00±0.15 0.50±0.10 0.60 0.20±0.10 SNT03 0603 1.60±0.15 0.80±0.15 0.95 SNT05 0805 2.00±0.20 1.25±0.20 1.00 0.40±0.15 0.40±0.20 Unit: mm Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS ELECTRICAL CHARACTERISTICS Part Number SNT01B103□338* SNT01B683□425* SNT01B104□425* SNT02A103□34D* SNT02A103□395* SNT02A223□395* SNT02A333□405* SNT02A683□410* SNT02A104□405* SNT02A104□436* SNT02B103□338* SNT02B473□405* SNT02B104□354* SNT02B104□480* SNT02B224□470* SNT02B474□470* SNT03A202□340* SNT03A472□34D* SNT03A472□370* SNT03A502□34D* SNT03A502□385* SNT03A682□34D* SNT03A682□395* SNT03A103□34D* SNT03A103□39H* SNT03A103□430* SNT03A223□392* SNT03A473□39H* SNT03A683□39H* SNT03A104□405* SNT03A104□436* SNT03A154□406* SNT03A204□410* SNT03A474□415* SNT03B221□350* SNT03B222□395* SNT03B472□425* SNT03B103□338* SNT03B103□420* SNT03B104□355* SNT03B224□460* SNT05A502□34D* SNT05A103□34D* SNT05A103□395* SNT05A473□39H* SNT05A104□405* SNT05A684□450* Zero Power Resistance Size at 25°C 0201 0402 0603 0805 R25 (KΩ) 10 68 100 10 10 22 33 68 100 100 10 47 100 100 220 470 2 4.7 4.7 5 5 6.8 6.8 10 10 10 22 47 68 100 100 150 200 470 0.22 2.2 4.7 10 10 100 220 5 10 10 47 100 680 Tolerance of R25 ( ±%) 1, 2, 3, 5, 10 1, 2, 3, 5, 10 5, 10 1, 2, 3, 5, 10 5, 10 1, 2, 3, 5, 10 5, 10 1, 2, 3, 5, 10 1, 2, 3, 5, 10 5, 10 B Value (K) 3380 25/50 4250 4250 3435 3950 3950 25/85 4050 4100 4050 4360 3380 4050 3540 25/50 4800 4700 4700 3400 3435 3700 3435 3850 3435 3950 3435 3975 25/85 4300 3920 3975 3975 4050 4360 4060 4100 4150 3500 3950 4250 25/50 3380 4200 3550 4600 3435 3435 3950 25/85 3975 4050 4500 Tolerance of B value Max. Power Dissipation at 25℃ . Dissipation Factor Thermal Time Constant Operating Temperature Range (±%) PMAX (mW) δ (mW/°C) ԏ (Sec.) TL~TU(°C) F, G, H 140 Approx. 1.4 Approx. 1.2 -40 ~ +125 F, G, H 170 Approx. 1.7 Approx. 2.0 -40 ~ +125 210 Approx. 2.1 Approx. 3.1 -40~+125 240 Approx. 2.4 Approx. 5.4 -40~+125 H F, G, H H F, G, H H F, G, H F, G, H H Note 1: □ = Tolerance of R25 * = Tolerance of B value Note 2: Special specifications are available upon request Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS MAX POWER DISSIPATION DERATING CURVE R-T CHARACTERISTIC CURVES Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS R-T CHARACTERISTIC CURVES (CONT’D) Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS R-T CHARACTERISTIC CURVES (CONT’D) SOLDERING RECOMMENDATION IR-reflow Soldering Profile Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS Recommended Reworking Conditions with Soldering Iron Item Conditions Temperature of Soldering Iron-tip 360°C (MAX.) Soldering Time 3 sec. (MAX.) Diameter of Soldering Iron-tip Φ3mm (MAX.) Caution: Please do not touch the component surface with soldering iron directly to avoid its damage. Recommended Soldering Pad Dimensions Size Z (mm) G (mm) X (mm) Y (mm) 0201 0.8 0.3 0.3 0.25 0402 1.7 0.5 0.6 0.6 0603 3.0 1.0 1.0 1.0 0805 3.4 1.0 1.4 1.2 Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS Notice of Soldering and Mounting on PC Board For mounting SMDs on a PC board, supporting pin is suggested for use (refer to figure b) to avoid cracks caused by external stress (refer to figure a). If circuit bending is needed for PC board design, please refer to figure (c) for mounting positions to avoid cracks caused by stress imposed on the product. O means better, △ is acceptable, and X is worst. During circuit bending, please locate SMDs horizontally to the direction in which stress act to avoid its cracks (refer to figure d). Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS RELIABILITY Item Standard Test conditions / Methods Specifications Bending Strength IEC 60068-2-21 Warp : 2mm for 0402,0603 and 0805 1mm for 0201 Speed ＜ 0.5mm/sec. Duration: 10 sec. on PCB Solderability IEC 60068-2-58 245 ± 5°C, 3 ± 0.3 sec. Resistance to Soldering Heat IEC 60068-2-58 260 ± 5°C, 10 ± 1 sec. No Visible Damage |ΔR25/R25| ≤ 3% High Temperature Storage IEC 60068-2-2 125 ± 5°C, 1000 ± 24 hrs No Visible Damage |ΔR25/R25| ≤ 5% Damp Heat, Steady State IEC 60068-2-78 40 ± 2°C, 90~95% RH, 1000 ± 24 hrs No Visible Damage |ΔR25/R25| ≤ 3% Rapid Change of Temperature IEC 60068-2-14 The conditions shown below shall be repeated 5 cycles on PCB. Step Temperature (°C) Duration (minutes) 1 -40 ± 5 30 ± 3 2 Room Temperature 5±3 3 125 ± 5 30 ± 3 4 Room Temperature 5±3 No Visible Damage |ΔR25/R25| ≤ 3% Max. Power Dissipation IEC 60539-1 25 ± 5°C, PMAX, 1000 ± 24 hrs No Visible Damage |ΔR25/R25| ≤ 5% No Visible Damage |ΔR25/R25| ≤ 5% At least 95% of terminal electrode is covered by new solder Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS Package Taping Specification Unit: mm Index Size A0 B0 W E F P1 P2 P0 D0 K0 ±0.05 ±0.12 ±0.2 ±0.1 ±0.05 ±0.1 ±0.05 ±0.1 ±0.1 ±0.1 0201 0.38 0.68 8 1.75 3.5 2 2 4 1.55 0.38 0402 0.62 1.12 8 1.75 3.5 2 2 4 1.55 0.60 Unit: mm Index Size A0 B0 W E F P1 P2 P0 D0 K0 ±0.2 ±0.2 ±0.2 ±0.1 ±0.05 ±0.1 ±0.05 ±0.1 ±0.1 ±0.1 0603 1.1 1.9 8 1.75 3.5 4 2 4 1.55 0.95 0805 1.5 2.3 8 1.75 3.5 4 2 4 1.55 1.0 Rev. 7 SNT Series NTC Thermistors (SMD Type) MERITEK RoHS Quantity Size Quantity (pcs/reel) 0201 15,000 0402 10,000 0603 4,000 0805 3,500 Warehouse Storage Conditions of Products Storage Conditions : 1. Storage Temperature: -10°C ~ +40°C 2. Relative Humidity: ≦75%RH 3. Keep away from corrosive atmosphere and sunlight. Period of Storage : 1 year Rev. 7