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NT73
negative tempco thermistor features * * * * * Anti-leaching nickel barrier terminations Twelve standard resistance values Suitable for reflow and wave soldering Marking: Black three-digit on pink body color Products with lead-free terminations meet RoHS requirements
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circuit protection
dimensions and construction
c L c Type
(Inch Size Code)
L
Dimensions inches (mm) W c d
t .02.004 (0.50.1)
+.008 -.004 (0.5 +0.2 ) -0.1
W Solder Plating t d Protective Coating Resistive Inner Film Electrode Ni Plating
1J (0603) 2A (0805) 2B (1206)
.063.008 .031.004 .012.004 .012.004 (1.60.2) (0.80.1) (0.30.1) (0.30.1) .079.008 .049.004 .016.008 (2.00.2) (1.250.1) (0.40.2) .126.008 .063.008 (3.20.2) (1.60.2) .02.008 (0.50.3) .012 (0.3 .016 (0.4
+.008 -.004 +0.2 ) -0.1 +.008 -.004 +0.2 ) -0.1
.02
.024.004 (0.60.1)
Ceramic Substrate
ordering information
New Part # NT73 Type 2A Size Code 1J: 0603 2A: 0805 2B: 1206 T Termination Material T: Sn (Other termination styles available, contact factory for options) TD Packaging TD: 7" paper tape (5,000 pieces/reel) 103 Nominal Resistance 2 significant figures + 1 multiplier K Resistance Tolerance J: 5% K: 10% L: 15% 3800 B Constant Nominal 3200 3500 3700 3800 3950 4100 J B Constant Tolerance H: 3% J: 5% K: 10%
applications and ratings
Part Designation Resistance @ 25C
6.8k 10k 15k 10k 20k 22k 30k 33k 47k 68k 100k 47k
Resistance Tolerance
B Constant @ 25C/75C
3500K 3800K 3700K
B Constant Tolerance
10%
Thermal Dissipation Constant (mW/C)
Power Rating (mW)
Operating Temperature Range
5%
3%
NEW
NT731J
J: 5% K: 10%
2
3800K
5
5%
3%
-55C to +125C
4100K
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. 1/05/06
148
KOA Speer Electronics, Inc. * Bolivar Drive * P Box 547 * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com .O.
NT73
negative tempco thermistor applications and ratings (continued)
Part Designation Resistance @ 25C
1k 2k 2.2k 2.4k 3.3k 4.7k 5k 6.8k 10k 15k 10k 20k 22k 30k 33k 47k 68k 100k 150k 50k 10k 15k 22k 30k 33k 47k 68k 100k 150k 1k 2.2k 3.3k 4.7k 6.8k 10k 22k 33k 47k 68k 100k
Resistance Tolerance
B Constant @ 25C/75C
3200K
B Constant Tolerance
K: 10% L: 15%
3500K
10%
3800K 3500K
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3800K
5%
2.8
5 -55C to +125C
J: 5% K: 10% L: 15%
3950K
4100K
3%
3200K
K: 10% L: 15% J: 5% K: 10% L: 15%
3500K
10% 3 5
NT732B
3800K
5%
environmental applications Temperature Characteristics
10,000,000 1,000,000 Resistance () 100,000 10,000 1,000 100 10 -50 -25 0 25 50 75 Temperature (C) 100
100k 10k
3800k
RT/R25 Ratio vs. B Constant
Resistance 1k 5k 10k 100k 10k Resistance 1k 5k 10k 100k 10k B Constant 3200K 3500K 3700K 3800K 4100K B Constant 3200K 3500K 3700K 3800K 4100K k k k k k k k k Temp. (C) Temp. (C)
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 38770 28840 21706 16517 12698 9857.0 7721.2 6100.5 4858.7 3899.0 3151.3 2564.2 2099.9 1730.0 1433.5 1194.2 1000.0 841.48 711.39 273.24 197.67 144.85 107.43 80.577 61.077 46.759 36.137 28.173 22.147 17.546 14.004 11.256 9.1063 7.4135 6.0712 5.0000 4.1398 3.4451 638.23 465.81 343.25 255.22 191.37 144.64 110.13 83.710 64.190 49.640 38.680 30.370 23.970 19.070 15.270 12.320 10.000 8.1700 6.7100 7692.5 5414.6 3864.5 2794.3 2045.2 1514.1 1133.0 856.49 653.63 503.31 390.86 305.97 241.34 191.73 153.36 123.46 100.00 81.470 66.739 1203.1 820.76 568.09 398.57 283.20 203.64 148.07 108.37 80.182 59.943 45.252 34.478 26.473 20.506 16.016 12.608 10.000 7.9880 6.4242 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 604.07 515.10 441.00 379.00 326.90 282.95 245.72 214.08 187.08 163.96 144.11 127.00 112.21 99.377 88.224 78.501 70.004 62.558 2.8809 2.4202 2.0421 1.7302 1.4718 1.2568 1.0771 0.92637 0.79937 0.69199 0.60087 0.52329 0.45701 0.40016 0.35129 0.30915 0.27272 0.24114 5.5500 4.6100 3.8500 3.2300 2.7200 2.3100 1.9700 1.6800 1.4500 1.2500 1.0800 0.94000 0.82000 0.72000 0.63000 0.56000 0.49000 0.44000 54.959 45.484 37.823 31.594 26.506 22.330 18.886 16.035 13.663 11.682 10.022 8.6257 7.4466 6.4466 5.5968 4.8721 4.2523 3.7207 5.1999 4.2349 3.4692 2.8585 2.3682 1.9721 1.6504 1.3877 1.1724 0.99491 0.84926 0.72802 0.62662 0.54156 0.46982 0.40906 0.35741 0.31332
1k
3800k 3200k
125
Note: RT/R25 ratio is the resistance at temperature (T) divided by the nominal resistance at 25C. The RT/R25 ratio value is multiplied by the thermistor's nominal 25C value to determine the nominal resistance value at a given temperature in the chart above.
Performance Characteristics
Parameter High Temperature Exposure Resistance to Solder Heat Terminal Strength-Bend Moisture Resistance Life Temperature Cycling Dielectric Withstanding Voltage 2A 2B Insulation Resistance Maximum R 3.0% 1.0% 1.0% 3.0% 3.0% 3.0% 400V 400V 10,000 M Minimum Test Method 1000 hours @ 80C MIL-R-55342 4.7.7, 260C for 10 seconds 2mm min. deflection in either direction for 10 seconds MIL-STD-202, Method 103, 40C, 90 - 95% RH, 1000 hours 80C, DC 5mm, 1000 hours 30 minutes @ -55C, 15 minutes @ +25C, 30 minutes @ +125C, 15 minutes @ +25C, 50 cycles 1 minute minimum MIL-STD-202, Method 301 --
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
12/02/04
KOA Speer Electronics, Inc. * Bolivar Drive * P Box 547 * Bradford, PA 16701 * USA * 814-362-5536 * Fax: 814-362-8883 * www.koaspeer.com .O.
149
circuit protection
Thermal Dissipation Constant (mW/C)
Power Rating (mW)
Operating Temperature Range

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