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Specifications
Resistance @ 25℃:
10kΩ
Power(Watts):
100mW
Operating Temperature:
-40℃~+125℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
310uA
Thermal Time Constant:
5s
B Constant (25℃/85℃):
3480K
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3435K
B Constant Tolerance:
±1%
Mfr. Part #:
CMFA 103F3435
Package:
0603
Key Attributes
Model Number:
CMFA 103F3435
Product Description
NTC Thermistors
Product Overview
Nanjing Shiheng Electronics Technology Co., Ltd. offers the CMFA series of chip NTC thermistors, designed for precise temperature sensing and control. These thermistors are characterized by their high accuracy, reliability, and suitability for a wide range of operating temperatures. They are ideal for applications requiring accurate resistance-temperature characteristics, such as temperature measurement, compensation, and surge current limiting.
Product Attributes
- Brand: Shiheng
- Origin: Nanjing, China
- Product Type: Chip NTC Thermistor
- Series: CMFA
Technical Specifications
| Part Number | Resistance (25) (k) | B Constant (25/50) (K) | B Constant (25/85) (K) | Permissible Operating Current (25) (mA) | Dissipation Factor (mW/) | Thermal Time Constant (s) | Rated Power (25) (mW) | Operating Ambient Temperature () | Dimensions (LWT) (mm) | Tolerance of Resistance |
|---|---|---|---|---|---|---|---|---|---|---|
| CMFA 103F3435 | 10 1% | 3435 1% | 3480 | 0.31 | 1.0 | <5 | 100 | -40+125 | 1.600.800.80 (A) | J (5%) |
Dimensions
Fig. 1: Shape and Dimensions
Fig. 2: Recommended PCB Pattern for Reflow Soldering
| Type | L (inch [mm]) | W (inch [mm]) | T (inch [mm]) | a (inch [mm]) | A (inch [mm]) | B (inch [mm]) |
|---|---|---|---|---|---|---|
| [0603] | 0.0630.006 [1.60.15] | 0.0310.006 [0.80.15] | 0.0310.006 [0.80.15] | 0.0120.008 [0.30.2] | [0.6-0.8] | [0.6-0.7] |
Product Identification Breakdown (CMFA 103F3435)
- Type: CMF (Chip NTC Thermistor)
- External Dimensions (mm): A (0603) 1.600.800.80
- Nominal Zero-Power Resistance at 25: 103 (10k)
- Tolerance of Resistance: J (5%)
- B Constant: 3435 (3435K)
Test Conditions
Standard Atmospheric Conditions:
- Ambient Temperature: 2015
- Relative Humidity: 6520%
- Air Pressure: 86 kPa~106 kPa
Conditions for Disputed Results:
- Ambient Temperature: 252
- Relative Humidity: 655%
- Air Pressure: 86 kPa~106 kPa
Inspection Equipment
- Visual Examination: 20magnifier
- Resistance value test: Thermistor resistance tester
Reliability Test Summary
| Item | Standard | Requirements |
|---|---|---|
| Terminal Strength | IEC 60068-2-21 | No removal or split of the termination or other defects shall occur. |
| Resistance to Flexure | IEC 60068-2-21 | No visible damage. |R25/R25| 2% |
| Vibration | IEC 60068-2-80 | No visible damage. |
| Dropping | IEC 60068-2-32 | No visible damage. |
| Solderability | IEC 60068-2-58 | No visible damage. Wetting shall exceed 95% coverage. |
| Resistance to Soldering Heat | IEC 60068-2-58 | No visible damage. |R25/R25| 2%, |B/B| 1% |
| Temperature Cycling | IEC 60068-2-14 | No visible damage. |R25/R25| 2%, |B/B| 1% |
| High Temperature Storage | IEC 60068-2-2 | No visible damage. |R25/R25| 2%, |B/B| 1% |
| Low Temperature Storage | IEC 60068-2-1 | No visible damage. |R25/R25| 2%, |B/B| 1% |
| Damp Heat Storage | IEC 60068-2-78 | No visible damage. |R25/R25| 2%, |B/B| 1% |
| High Temperature Load | IEC 60539-1 5.25.4 | No visible damage. |R25/R25| 2%, |B/B| 1% |
Taping Information
| Type | Tape Thickness (mm) | Tape Material | Quantity per Reel |
|---|---|---|---|
| 0201 | 0.50.15 | Paper Tape | 15K |
| X | 0.50.15 | Paper Tape | 10K |
| A | 0.80.15 | Paper Tape | 4K |
| B | 0.850.2 | Paper Tape | 4K |
Storage Conditions
- Storage Temperature: -1040
- Relative Humidity: 75%RH
- Keep away from dust, corrosive atmosphere, and sunlight.
- Period of Storage: 6 Months after delivery
Notes & Warnings
- The CMF series thermistors shall not be operated or stored under the following environmental conditions: Corrosive or deoxidized atmospheres, volatile or inflammable atmospheres, dusty conditions, excessively high or low pressure, humid sites, places with brine, oil, chemical liquid or organic solvent, intense vibration, or analogously deleterious conditions.
- The ceramic body of the CMF series thermistors is fragile; no excessive pressure or impact shall be exerted on it.
- The CMF series thermistors shall not be operated beyond the specified Operating Temperature Range.
Recommended Soldering Technologies
Re-flowing Profile
- Ramp: 1~2/sec.
- Pre-heating: 150~170/9030 sec.
- Time above 240: 20~40 sec.
- Peak temperature: 260 Max./10 sec.
- Solder paste: 96.5Sn/3.0Ag/0.5Cu
- Max. 2 times for re-flowing.
Iron Soldering Profile
- Iron soldering power: Max. 20W
- Pre-heating: 150/60 sec.
- Soldering Tip temperature: 280 Max.
- Soldering time: 3 sec Max.
- Solder paste: 96.5Sn/3.0Ag/0.5Cu
- Max. 1 time for iron soldering.
- Note: Take care not to apply the tip of the soldering iron to the terminal electrodes.
R-T Table (CMFA 103F3435)
| Temperature () | R Min (k) | R Center (k) | R Max (k) | Resistance TOL. | Temperature TOL. () |
|---|---|---|---|---|---|
| -40 | 192.371 | 200.225 | 208.380 | 4.07% | 0.69 |
| -39 | 182.189 | 189.524 | 197.134 | 4.02% | 0.69 |
| -38 | 172.599 | 179.449 | 186.553 | 3.96% | 0.68 |
| -37 | 163.561 | 169.961 | 176.593 | 3.90% | 0.68 |
| -36 | 155.043 | 161.022 | 167.216 | 3.85% | 0.67 |
| -35 | 147.012 | 152.600 | 158.384 | 3.79% | 0.67 |
| -34 | 139.439 | 144.661 | 150.064 | 3.73% | 0.66 |
| -33 | 132.294 | 137.176 | 142.224 | 3.68% | 0.66 |
| -32 | 125.552 | 130.117 | 134.833 | 3.63% | 0.65 |
| -31 | 119.189 | 123.457 | 127.865 | 3.57% | 0.65 |
| -30 | 113.181 | 117.173 | 121.293 | 3.52% | 0.64 |
| -29 | 107.507 | 111.241 | 115.093 | 3.46% | 0.64 |
| -28 | 102.147 | 105.640 | 109.242 | 3.41% | 0.63 |
| -27 | 97.083 | 100.351 | 103.719 | 3.36% | 0.62 |
| -26 | 92.295 | 95.354 | 98.504 | 3.30% | 0.62 |
| -25 | 87.769 | 90.632 | 93.578 | 3.25% | 0.61 |
| -24 | 83.489 | 86.168 | 88.925 | 3.20% | 0.61 |
| -23 | 79.440 | 81.948 | 84.527 | 3.15% | 0.60 |
| -22 | 75.608 | 77.956 | 80.370 | 3.10% | 0.60 |
| -21 | 71.981 | 74.180 | 76.439 | 3.04% | 0.59 |
| -20 | 68.548 | 70.607 | 72.721 | 2.99% | 0.59 |
| -19 | 65.296 | 67.225 | 69.203 | 2.94% | 0.58 |
| -18 | 62.216 | 64.022 | 65.874 | 2.89% | 0.57 |
| -17 | 59.297 | 60.989 | 62.723 | 2.84% | 0.57 |
| -16 | 56.531 | 58.116 | 59.739 | 2.79% | 0.56 |
| -15 | 53.908 | 55.393 | 56.913 | 2.74% | 0.56 |
| -14 | 51.421 | 52.812 | 54.236 | 2.69% | 0.55 |
| -13 | 49.062 | 50.366 | 51.698 | 2.65% | 0.54 |
| -12 | 46.824 | 48.045 | 49.293 | 2.60% | 0.54 |
| -11 | 44.700 | 45.844 | 47.013 | 2.55% | 0.53 |
| -10 | 42.683 | 43.755 | 44.850 | 2.50% | 0.52 |
| -9 | 40.768 | 41.772 | 42.798 | 2.45% | 0.52 |
| -8 | 38.949 | 39.890 | 40.851 | 2.41% | 0.51 |
| -7 | 37.221 | 38.103 | 39.002 | 2.36% | 0.50 |
| -6 | 35.578 | 36.405 | 37.247 | 2.31% | 0.50 |
| -5 | 34.017 | 34.792 | 35.581 | 2.27% | 0.49 |
| -4 | 32.533 | 33.259 | 33.998 | 2.22% | 0.48 |
| -3 | 31.121 | 31.802 | 32.493 | 2.18% | 0.48 |
| -2 | 29.779 | 30.416 | 31.064 | 2.13% | 0.47 |
| -1 | 28.501 | 29.098 | 29.704 | 2.08% | 0.46 |
| 0 | 27.285 | 27.844 | 28.412 | 2.04% | 0.46 |
| 1 | 26.127 | 26.651 | 27.182 | 1.99% | 0.45 |
| 2 | 25.024 | 25.515 | 26.013 | 1.95% | 0.44 |
| 3 | 23.974 | 24.434 | 24.899 | 1.91% | 0.43 |
| 4 | 22.974 | 23.404 | 23.840 | 1.86% | 0.43 |
| 5 | 22.020 | 22.423 | 22.831 | 1.82% | 0.42 |
| 6 | 21.111 | 21.488 | 21.870 | 1.78% | 0.41 |
| 7 | 20.245 | 20.598 | 20.955 | 1.73% | 0.41 |
| 8 | 19.419 | 19.749 | 20.082 | 1.69% | 0.40 |
| 9 | 18.630 | 18.939 | 19.251 | 1.65% | 0.39 |
| 10 | 17.878 | 18.167 | 18.459 | 1.60% | 0.38 |
| 11 | 17.161 | 17.431 | 17.703 | 1.56% | 0.38 |
| 12 | 16.476 | 16.728 | 16.982 | 1.52% | 0.37 |
| 13 | 15.821 | 16.057 | 16.295 | 1.48% | 0.36 |
| 14 | 15.197 | 15.417 | 15.639 | 1.44% | 0.35 |
| 15 | 14.600 | 14.806 | 15.012 | 1.40% | 0.34 |
| 16 | 14.030 | 14.222 | 14.414 | 1.36% | 0.34 |
| 17 | 13.485 | 13.664 | 13.844 | 1.32% | 0.33 |
| 18 | 12.964 | 13.131 | 13.298 | 1.28% | 0.32 |
| 19 | 12.466 | 12.621 | 12.777 | 1.24% | 0.31 |
| 20 | 11.990 | 12.134 | 12.280 | 1.20% | 0.30 |
| 21 | 11.534 | 11.669 | 11.804 | 1.16% | 0.30 |
| 22 | 11.099 | 11.224 | 11.349 | 1.12% | 0.29 |
| 23 | 10.681 | 10.798 | 10.914 | 1.08% | 0.28 |
| 24 | 10.282 | 10.390 | 10.498 | 1.04% | 0.27 |
| 25 | 9.900 | 10.000 | 10.100 | 1.00% | 0.26 |
| 26 | 9.527 | 9.627 | 9.727 | 1.04% | 0.27 |
| 27 | 9.169 | 9.269 | 9.369 | 1.08% | 0.29 |
| 28 | 8.828 | 8.927 | 9.026 | 1.11% | 0.30 |
| 29 | 8.500 | 8.599 | 8.698 | 1.15% | 0.31 |
| 30 | 8.186 | 8.285 | 8.383 | 1.19% | 0.32 |
| 31 | 7.886 | 7.984 | 8.082 | 1.23% | 0.33 |
| 32 | 7.598 | 7.695 | 7.792 | 1.26% | 0.35 |
| 33 | 7.322 | 7.419 | 7.515 | 1.30% | 0.36 |
| 34 | 7.058 | 7.153 | 7.249 | 1.34% | 0.37 |
| 35 | 6.805 | 6.899 | 6.994 | 1.38% | 0.38 |
| 36 | 6.562 | 6.655 | 6.749 | 1.41% | 0.40 |
| 37 | 6.328 | 6.421 | 6.514 | 1.45% | 0.41 |
| 38 | 6.105 | 6.196 | 6.288 | 1.48% | 0.42 |
| 39 | 5.890 | 5.980 | 6.071 | 1.52% | 0.43 |
| 40 | 5.684 | 5.773 | 5.863 | 1.56% | 0.45 |
| 41 | 5.487 | 5.575 | 5.663 | 1.59% | 0.46 |
| 42 | 5.297 | 5.384 | 5.471 | 1.63% | 0.47 |
| 43 | 5.115 | 5.200 | 5.287 | 1.66% | 0.49 |
| 44 | 4.940 | 5.024 | 5.109 | 1.70% | 0.50 |
| 45 | 4.771 | 4.855 | 4.939 | 1.73% | 0.51 |
| 46 | 4.610 | 4.692 | 4.775 | 1.77% | 0.52 |
| 47 | 4.455 | 4.535 | 4.617 | 1.80% | 0.54 |
| 48 | 4.305 | 4.385 | 4.465 | 1.84% | 0.55 |
| 49 | 4.162 | 4.240 | 4.319 | 1.87% | 0.57 |
| 50 | 4.024 | 4.101 | 4.179 | 1.90% | 0.58 |
| 51 | 3.891 | 3.967 | 4.044 | 1.94% | 0.59 |
| 52 | 3.763 | 3.838 | 3.914 | 1.97% | 0.61 |
| 53 | 3.641 | 3.714 | 3.788 | 2.01% | 0.62 |
| 54 | 3.522 | 3.595 | 3.668 | 2.04% | 0.63 |
| 55 | 3.409 | 3.480 | 3.552 | 2.07% | 0.65 |
| 56 | 3.299 | 3.369 | 3.440 | 2.10% | 0.66 |
| 57 | 3.194 | 3.262 | 3.332 | 2.14% | 0.68 |
| 58 | 3.092 | 3.160 | 3.228 | 2.17% | 0.69 |
| 59 | 2.994 | 3.061 | 3.128 | 2.20% | 0.70 |
| 60 | 2.900 | 2.965 | 3.031 | 2.24% | 0.72 |
| 61 | 2.809 | 2.873 | 2.938 | 2.27% | 0.73 |
| 62 | 2.722 | 2.785 | 2.849 | 2.30% | 0.75 |
| 63 | 2.637 | 2.699 | 2.762 | 2.33% | 0.76 |
| 64 | 2.556 | 2.617 | 2.679 | 2.36% | 0.78 |
| 65 | 2.478 | 2.537 | 2.598 | 2.39% | 0.79 |
| 66 | 2.402 | 2.461 | 2.520 | 2.43% | 0.81 |
| 67 | 2.329 | 2.387 | 2.445 | 2.46% | 0.82 |
| 68 | 2.259 | 2.315 | 2.373 | 2.49% | 0.84 |
| 69 | 2.191 | 2.246 | 2.303 | 2.52% | 0.85 |
| 70 | 2.125 | 2.180 | 2.236 | 2.55% | 0.87 |
| 71 | 2.062 | 2.116 | 2.170 | 2.58% | 0.88 |
| 72 | 2.001 | 2.054 | 2.107 | 2.61% | 0.90 |
| 73 | 1.942 | 1.994 | 2.047 | 2.64% | 0.91 |
| 74 | 1.885 | 1.936 | 1.988 | 2.67% | 0.93 |
| 75 | 1.830 | 1.880 | 1.931 | 2.70% | 0.94 |
| 76 | 1.777 | 1.826 | 1.876 | 2.73% | 0.96 |
| 77 | 1.726 | 1.774 | 1.823 | 2.76% | 0.98 |
| 78 | 1.677 | 1.724 | 1.772 | 2.79% | 0.99 |
| 79 | 1.629 | 1.675 | 1.722 | 2.82% | 1.01 |
| 80 | 1.582 | 1.628 | 1.674 | 2.85% | 1.02 |
| 81 | 1.538 | 1.582 | 1.628 | 2.88% | 1.04 |
| 82 | 1.494 | 1.538 | 1.583 | 2.91% | 1.05 |
| 83 | 1.452 | 1.495 | 1.539 | 2.94% | 1.07 |
| 84 | 1.412 | 1.454 | 1.497 | 2.97% | 1.09 |
| 85 | 1.373 | 1.414 | 1.456 | 3.00% | 1.10 |
| 86 | 1.335 | 1.375 | 1.417 | 3.02% | 1.12 |
| 87 | 1.298 | 1.338 | 1.379 | 3.05% | 1.14 |
| 88 | 1.263 | 1.302 | 1.342 | 3.08% | 1.15 |
| 89 | 1.229 | 1.267 | 1.306 | 3.11% | 1.17 |
| 90 | 1.195 | 1.233 | 1.272 | 3.14% | 1.19 |
| 91 | 1.163 | 1.200 | 1.238 | 3.16% | 1.20 |
| 92 | 1.132 | 1.168 | 1.206 | 3.19% | 1.22 |
| 93 | 1.102 | 1.137 | 1.174 | 3.22% | 1.24 |
| 94 | 1.073 | 1.108 | 1.143 | 3.25% | 1.25 |
| 95 | 1.044 | 1.079 | 1.114 | 3.27% | 1.27 |
| 96 | 1.017 | 1.051 | 1.085 | 3.30% | 1.29 |
| 97 | 0.990 | 1.023 | 1.057 | 3.33% | 1.31 |
| 98 | 0.965 | 0.997 | 1.030 | 3.36% | 1.32 |
| 99 | 0.940 | 0.971 | 1.004 | 3.38% | 1.34 |
| 100 | 0.915 | 0.947 | 0.979 | 3.41% | 1.36 |
| 101 | 0.892 | 0.923 | 0.954 | 3.44% | 1.38 |
| 102 | 0.869 | 0.899 | 0.930 | 3.46% | 1.39 |
| 103 | 0.847 | 0.877 | 0.907 | 3.49% | 1.41 |
| 104 | 0.826 | 0.855 | 0.885 | 3.51% | 1.43 |
| 105 | 0.805 | 0.833 | 0.863 | 3.54% | 1.45 |
| 106 | 0.785 | 0.813 | 0.842 | 3.57% | 1.46 |
| 107 | 0.765 | 0.793 | 0.821 | 3.59% | 1.48 |
| 108 | 0.746 | 0.773 | 0.801 | 3.62% | 1.50 |
| 109 | 0.728 | 0.754 | 0.782 | 3.64% | 1.52 |
| 110 | 0.710 | 0.736 | 0.763 | 3.67% | 1.54 |
| 111 | 0.693 | 0.718 | 0.745 | 3.70% | 1.55 |
| 112 | 0.676 | 0.701 | 0.727 | 3.72% | 1.57 |
| 113 | 0.659 | 0.684 | 0.710 | 3.75% | 1.59 |
| 114 | 0.643 | 0.668 | 0.693 | 3.77% | 1.61 |
| 115 | 0.628 | 0.652 | 0.677 | 3.80% | 1.63 |
| 116 | 0.613 | 0.637 | 0.661 | 3.82% | 1.65 |
| 117 | 0.598 | 0.622 | 0.645 | 3.85% | 1.67 |
| 118 | 0.584 | 0.607 | 0.630 | 3.87% | 1.69 |
| 119 | 0.571 | 0.593 | 0.616 | 3.89% | 1.70 |
| 120 | 0.557 | 0.579 | 0.602 | 3.92% | 1.72 |
| 121 | 0.544 | 0.566 | 0.588 | 3.94% | 1.74 |
| 122 | 0.532 | 0.553 | 0.575 | 3.97% | 1.76 |
| 123 | 0.519 | 0.540 | 0.562 | 3.99% | 1.78 |
| 124 | 0.507 | 0.528 | 0.549 | 4.02% | 1.80 |
| 125 | 0.496 | 0.516 | 0.537 | 4.04% | 1.82 |
2410121534_Nanjing-Shiheng-Elec-CMFA-103F3435_C2889048.pdf
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