Custom Made Epoxy-encapsulated NTC Thermistor 2.7KOhm 3977K 1% 500mW For Coolant Temperature Sensor 2.1-2.7KOhm At 20C
Applications
Temperature measurement, sensing and control,temperature compensation in industrial and consumer
electronics.
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Description
These thermistors have a negative temperature coefficient.
The device consists of a chip with two solid copper tin plated leads. It is grey lacquered and color coded, but not insulated.
Features
• Accuracy over a wide temperature range
• High stability over a long life
• Excellent price/performance ratio
• Wide resistance range
• Cost-effective
• Tinned copper leads
MOUNTING
By soldering in any position.
Not intended for potted applications.
Dimension (mm)
| NO | Material Name | Item/PN |
| a. | Element | R25=2.7KΩ±1% B25/85=3977K±1% |
| b. | Coating | Epoxy Resin (Black) |
| c. | Lead Wire | UL1332 AWG28 * 2C (Black) |
| NO | Item | Sign | Test Conditions | Min. | Normal value | Max. | Unit |
| 1. | Resistance at 25℃ | R25 |
Ta=25±0.05℃ PT≦0.1mw |
2.673 | 2.7 | 2.727 | kΩ |
| 2. | B Value | B25/85 | 3937 | 3977 | 4016 | k | |
| 3. | Dissipation factor | σ | Ta=25±0.5℃ | 2.5 | / | mw/℃ | |
| 4. | Time constant | τ | Ta=25±0.5℃ | / | / | 20 | sec |
| 5. | Insulation resistance | / | 500VDC | 100 | / | / | MΩ |
| 6. | Withstand voltage | / | 1500V AC (3mA) | 5 | / | / | Sec |
| 7. | Operating temp.range | / | / | -40 | / | +105 | ℃ |
| NO | Item | Technical requirements | Test conditions and method |
| 5-1. | High temp. Test |
DR/R25£±3%
DB/B£±3%
No change with withstand voltage, Insalution performance. Appearance without damage. |
100±5℃,power on 500±24 hrs,DC0.2mA |
| 5-2. | Low temp. tes | -15±5℃,power on 500±24 hrs,DC0.2mA | |
| 5-3. | Endure moisture test | Store in environment 55±2℃,90%-95%RH for 240±24 hrs | |
| 5-4. | Temp. cycle test | –20℃×30min→Room temp.×10min→ in 100℃ water×30min→Room temp.×10min 10 cycles | |
| 5-5 | Load electrify test | Power on DC1mA, 500hrs in room temp. and humid. | |
| 5-6 | Tensile tests | Applying 2 kg force lasts 1 min. | |
| 5-7 | Drop test | Free fall into concrete floor from height 1M ,10 cycle. | |
| 5-8 | Vibration test | Frequency range:10～55HZ Total amplitude 1.52mm 1 cycle 1 min ,direction and time X,Y,Z axs 2Hr each. | |
| 5-9 | Bending test | Bend 180°binding site wire and epoxy resin.Back and forth 10 times |
Resistance Vs. Temperature Table
| R－T CONVERSION TABLE | |||||||
| R25=2.7KΩ±1% B25/85=3977K±1% | |||||||
| T/℃ | Rmax | Rcen | Rmin | T/℃ | Rmax | Rcen | Rmin |
| -55 | 211.966 | 223.777 | 236.223 | -18 | 21.618 | 22.303 | 23.006 |
| -54 | 197.640 | 208.505 | 219.946 | -17 | 20.470 | 21.106 | 21.760 |
| -53 | 184.388 | 194.389 | 204.911 | -16 | 19.389 | 19.981 | 20.588 |
| -52 | 172.123 | 181.332 | 191.014 | -15 | 18.371 | 18.921 | 19.486 |
| -51 | 160.761 | 169.246 | 178.160 | -14 | 17.411 | 17.923 | 18.448 |
| -50 | 150.230 | 158.051 | 166.262 | -13 | 16.507 | 16.983 | 17.471 |
| -49 | 140.463 | 147.675 | 155.242 | -12 | 15.654 | 16.097 | 16.551 |
| -48 | 131.398 | 138.052 | 145.027 | -11 | 14.850 | 15.262 | 15.684 |
| -47 | 122.980 | 129.121 | 135.555 | -10 | 14.092 | 14.475 | 14.867 |
| -46 | 115.158 | 120.828 | 126.764 | -9 | 13.376 | 13.732 | 14.097 |
| -45 | 107.885 | 113.122 | 118.602 | -8 | 12.700 | 13.032 | 13.371 |
| -44 | 101.119 | 105.958 | 111.018 | -7 | 12.062 | 12.371 | 12.686 |
| -43 | 94.821 | 99.294 | 103.968 | -6 | 11.459 | 11.746 | 12.040 |
| -42 | 88.955 | 93.092 | 97.411 | -5 | 10.890 | 11.157 | 11.429 |
| -41 | 83.489 | 87.316 | 91.309 | -4 | 10.351 | 10.600 | 10.853 |
| -40 | 78.393 | 81.934 | 85.626 | -3 | 9.843 | 10.074 | 10.309 |
| -39 | 73.640 | 76.918 | 80.333 | -2 | 9.361 | 9.576 | 9.795 |
| -38 | 69.204 | 72.239 | 75.399 | -1 | 8.906 | 9.106 | 9.310 |
| -37 | 65.062 | 67.873 | 70.798 | 0 | 8.475 | 8.662 | 8.851 |
| -36 | 61.193 | 63.797 | 66.505 | 1 | 8.068 | 8.241 | 8.417 |
| -35 | 57.577 | 59.990 | 62.498 | 2 | 7.682 | 7.843 | 8.006 |
| -34 | 54.195 | 56.433 | 58.756 | 3 | 7.316 | 7.466 | 7.618 |
| -33 | 51.033 | 53.107 | 55.260 | 4 | 6.970 | 7.109 | 7.250 |
| -32 | 48.073 | 49.996 | 51.992 | 5 | 6.642 | 6.771 | 6.902 |
| -31 | 45.301 | 47.086 | 48.936 | 6 | 6.331 | 6.451 | 6.573 |
| -30 | 42.706 | 44.362 | 46.077 | 7 | 6.036 | 6.148 | 6.261 |
| -29 | 40.274 | 41.810 | 43.402 | 8 | 5.757 | 5.860 | 5.965 |
| -28 | 37.994 | 39.420 | 40.896 | 9 | 5.492 | 5.588 | 5.685 |
| -27 | 35.855 | 37.180 | 38.550 | 10 | 5.243 | 5.333 | 5.423 |
| -26 | 33.850 | 35.080 | 36.351 | 11 | 5.001 | 5.084 | 5.167 |
| -25 | 31.967 | 33.110 | 34.289 | 12 | 4.775 | 4.851 | 4.928 |
| -24 | 30.199 | 31.261 | 32.356 | 13 | 4.559 | 4.630 | 4.702 |
| -23 | 28.539 | 29.526 | 30.543 | 14 | 4.355 | 4.421 | 4.487 |
| -22 | 26.980 | 27.896 | 28.841 | 15 | 4.161 | 4.222 | 4.283 |
| -21 | 25.513 | 26.365 | 27.243 | 16 | 3.976 | 4.032 | 4.089 |
| -20 | 24.135 | 24.927 | 25.742 | 17 | 3.801 | 3.853 | 3.905 |
| -19 | 22.838 | 23.574 | 24.332 | 18 | 3.634 | 3.682 | 3.730 |
| R－T CONVERSION TABLE | |||||||
| R25=2.7KΩ±1% B25/50=3950K±1% | |||||||
| T/℃ | Rmax | Rcen | Rmin | T/℃ | Rmax | Rcen | Rmin |
| 19 | 3.475 | 3.520 | 3.564 | 56 | 0.764 | 0.782 | 0.799 |
| 20 | 3.324 | 3.365 | 3.407 | 57 | 0.736 | 0.753 | 0.771 |
| 21 | 3.181 | 3.219 | 3.257 | 58 | 0.710 | 0.727 | 0.744 |
| 22 | 3.044 | 3.079 | 3.114 | 59 | 0.684 | 0.701 | 0.717 |
| 23 | 2.914 | 2.946 | 2.978 | 60 | 0.660 | 0.676 | 0.692 |
| 24 | 2.790 | 2.820 | 2.849 | 61 | 0.637 | 0.652 | 0.668 |
| 25 | 2.673 | 2.700 | 2.727 | 62 | 0.614 | 0.629 | 0.645 |
| 26 | 2.558 | 2.585 | 2.612 | 63 | 0.593 | 0.608 | 0.623 |
| 27 | 2.449 | 2.476 | 2.503 | 64 | 0.572 | 0.587 | 0.602 |
| 28 | 2.345 | 2.372 | 2.399 | 65 | 0.552 | 0.566 | 0.581 |
| 29 | 2.246 | 2.273 | 2.299 | 66 | 0.533 | 0.547 | 0.561 |
| 30 | 2.152 | 2.178 | 2.205 | 67 | 0.515 | 0.528 | 0.542 |
| 31 | 2.062 | 2.088 | 2.115 | 68 | 0.497 | 0.511 | 0.524 |
| 32 | 1.977 | 2.002 | 2.029 | 69 | 0.480 | 0.493 | 0.507 |
| 33 | 1.895 | 1.921 | 1.946 | 70 | 0.464 | 0.477 | 0.490 |
| 34 | 1.817 | 1.843 | 1.868 | 71 | 0.448 | 0.461 | 0.474 |
| 35 | 1.743 | 1.768 | 1.793 | 72 | 0.433 | 0.446 | 0.458 |
| 36 | 1.672 | 1.697 | 1.722 | 73 | 0.419 | 0.431 | 0.443 |
| 37 | 1.605 | 1.629 | 1.654 | 74 | 0.405 | 0.417 | 0.429 |
| 38 | 1.540 | 1.564 | 1.588 | 75 | 0.392 | 0.403 | 0.415 |
| 39 | 1.479 | 1.502 | 1.526 | 76 | 0.379 | 0.390 | 0.402 |
| 40 | 1.420 | 1.443 | 1.467 | 77 | 0.367 | 0.378 | 0.389 |
| 41 | 1.364 | 1.387 | 1.410 | 78 | 0.355 | 0.366 | 0.377 |
| 42 | 1.310 | 1.333 | 1.356 | 79 | 0.343 | 0.354 | 0.365 |
| 43 | 1.259 | 1.281 | 1.304 | 80 | 0.332 | 0.343 | 0.353 |
| 44 | 1.210 | 1.232 | 1.254 | 81 | 0.322 | 0.332 | 0.342 |
| 45 | 1.163 | 1.184 | 1.206 | 82 | 0.312 | 0.322 | 0.332 |
| 46 | 1.118 | 1.139 | 1.161 | 83 | 0.302 | 0.311 | 0.321 |
| 47 | 1.075 | 1.096 | 1.117 | 84 | 0.292 | 0.302 | 0.312 |
| 48 | 1.035 | 1.055 | 1.075 | 85 | 0.283 | 0.293 | 0.302 |
| 49 | 0.995 | 1.015 | 1.036 | 86 | 0.274 | 0.284 | 0.293 |
| 50 | 0.956 | 0.976 | 0.995 | 87 | 0.266 | 0.275 | 0.284 |
| 51 | 0.922 | 0.941 | 0.961 | 88 | 0.258 | 0.267 | 0.276 |
| 52 | 0.888 | 0.906 | 0.926 | 89 | 0.250 | 0.258 | 0.267 |
| 53 | 0.855 | 0.873 | 0.892 | 90 | 0.242 | 0.251 | 0.259 |
| 54 | 0.823 | 0.841 | 0.860 | 91 | 0.235 | 0.243 | 0.252 |
| 55 | 0.793 | 0.811 | 0.829 | 92 | 0.228 | 0.236 | 0.244 |
| R－T CONVERSION TABLE | |||||||
| R25=2.7KΩ±1% B25/50=3950K±1% | |||||||
| T/℃ | Rmax | Rcen | Rmin | T/℃ | Rmax | Rcen | Rmin |
| 93 | 0.221 | 0.229 | 0.237 | ||||
| 94 | 0.215 | 0.222 | 0.230 | ||||
| 95 | 0.208 | 0.216 | 0.224 | ||||
| 96 | 0.202 | 0.210 | 0.217 | ||||
| 97 | 0.196 | 0.203 | 0.211 | ||||
| 98 | 0.191 | 0.198 | 0.205 | ||||
| 99 | 0.185 | 0.192 | 0.199 | ||||
| 100 | 0.180 | 0.187 | 0.193 | ||||
| 101 | 0.175 | 0.181 | 0.188 | ||||
| 102 | 0.170 | 0.176 | 0.183 | ||||
| 103 | 0.165 | 0.171 | 0.178 | ||||
| 104 | 0.160 | 0.166 | 0.173 | ||||
| 105 | 0.156 | 0.162 | 0.168 | ||||
| 106 | 0.151 | 0.157 | 0.164 | ||||
| 107 | 0.147 | 0.153 | 0.159 | ||||
| 108 | 0.143 | 0.149 | 0.155 | ||||
| 109 | 0.139 | 0.145 | 0.151 | ||||
| 110 | 0.135 | 0.141 | 0.147 | ||||
| 111 | 0.132 | 0.137 | 0.143 | ||||
| 112 | 0.128 | 0.133 | 0.139 | ||||
| 113 | 0.125 | 0.130 | 0.135 | ||||
| 114 | 0.121 | 0.127 | 0.132 | ||||
| 115 | 0.118 | 0.123 | 0.128 | ||||
| 116 | 0.115 | 0.120 | 0.125 | ||||
| 117 | 0.112 | 0.117 | 0.122 | ||||
| 118 | 0.109 | 0.114 | 0.119 | ||||
| 119 | 0.106 | 0.111 | 0.116 | ||||
| 120 | 0.104 | 0.108 | 0.113 | ||||
| 121 | 0.101 | 0.105 | 0.110 | ||||
| 122 | 0.098 | 0.103 | 0.107 | ||||
| 123 | 0.096 | 0.100 | 0.104 | ||||
| 124 | 0.093 | 0.098 | 0.102 | ||||
| 125 | 0.091 | 0.095 | 0.099 | ||||
