NT73
negative tempco thermistor
EU
features
•
Twelve standard resistance values
•
Products with lead-free terminations meet EU RoHS
requirements. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resistor element and glass.
thermal
protection
dimensions and construction
c
L
c
Type
(Inch Size Code)
L
Dimensions
inches
(mm)
W
c
d
t
.02±.004
(0.5±0.1)
+.008
-.004
+0.2
)
(0.5
-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
(1.6±0.2)
(0.8±0.1)
(0.3±0.1)
(0.3±0.1)
.079±.008 .049±.004 .016±.008
(2.0±0.2) (1.25±0.1) (0.4±0.2)
.126±.008 .063±.008
(3.2±0.2)
(1.6±0.2)
.02±.008
(0.5±0.3)
.012
(0.3
.016
(0.4
+.008
-.004
+0.2
)
-0.1
+.008
-.004
+0.2
)
-0.1
.02
.024±.004
(0.6±0.1)
Ceramic
Substrate
ordering information
NT73
Type
2A
Size
Code
1J: 0603
2A: 0805
2B: 1206
T
Termination
Material
T: Sn
(Other termination
styles may be
available, please
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
@ 25°C
6.8kΩ
10kΩ
15kΩ
10kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
47kΩ
1kΩ
2kΩ
2.2kΩ
2.4kΩ
3.3kΩ
4.7kΩ
5kΩ
Resistance
Tolerance
B Constant
@ 25°C/75°C
3500K
3800K
3700K
B Constant
Tolerance
±10%
Power
Rating
(mW)
Operating
Temperature
Range
±5%
±3%
NT731J
J: ±5%
K: ±10%
5
3800K
±5%
±3%
NT732A
K: ±10%
L: ±15%
J: ±5%; K: ±10%
L: ±15%
4100K
3200K
-55°C
to
+125°C
±10%
3500K
5
±5%
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.
11/28/17
230
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
NT73
negative tempco thermistor
applications and ratings
(continued)
Part
Designation
Resistance
@ 25°C
6.8kΩ
10kΩ
15kΩ
10kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
150kΩ
50kΩ
10kΩ
15kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
150kΩ
1kΩ
2.2kΩ
3.3kΩ
4.7kΩ
6.8kΩ
10kΩ
22kΩ
33kΩ
47kΩ
68kΩ
100kΩ
Resistance
Tolerance
K:±10%; L: ±15%
B Constant
@ 25°C/75°C
3800K
3500K
B Constant
Tolerance
±10%
Power
Rating
(mW)
Operating
Temperature
Range
3800K
J: ±5%
K: ±10%
L: ±15%
±5%
NT732A
5
3950K
4100K
±3%
-55°C
to
+125°C
3200K
K: ±10%
L: ±15%
J: ±5%
K: ±10%
L: ±15%
3500K
±10%
5
NT732B
3800K
±5%
Thermal dissipation constant - in the atmosphere - (reference) 1J: 2.0mW/°C, 2A: 2.8mW/°C, 2B: 3.0mW/°C
environmental applications
Temperature Characteristics
10,000,000
1,000,000
Resistance (Ω)
100,000
10,000
1,000
100
10
-50
-25
0
25
50
75
Temperature (°C)
100
100kΩ
10kΩ
3800k
RT/R25 Ratio vs. B Constant
Resistance
1k
Ω
5k
Ω
10k
Ω
100k
Ω
10kΩ
Resistance 1k
Ω
5k
Ω
10k
Ω
100k
Ω
10kΩ
B Constant 3200K 3500K 3700K 3800K 4100K B Constant 3200K 3500K 3700K 3800K 4100K
Ω
Ω
k
Ω
k
Ω
k
Ω
k
Ω
k
Ω
k
Ω
k
Ω
k
Ω
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
1kΩ
3800k
3200k
125
Performance Characteristics
Parameter
Resistance
B Constant
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Load Life
High Temperature Exposure
Requirement
∆
R ±(%+0.05Ω)
Limit
Typical
Within specified
tolerance
Within specified
tolerance
Other: ±1%,
±2%:1kΩ
±3.0%
±3.0%
±3.0%
±3.0%
––
––
Other: ±0.5%,
±1%:1kΩ
±1.3%
±1.1%
±2.5%
±1.6%
Test Method
25°C
+25°C/+75°C
260°C ± 5°C, 10 seconds ± 1 second
-55°C (30 minutes),+125°C (30 minutes), 50 cycles
40°C ± 2°C, 90 - 95% RH, 1000 hours
80°C ± 3°C, DC5mW, 1000 hours
80°C, 1000 hours
Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 80°C.
Please pay attention not to be applied ESD, it may cause of resistance change.
Actual Value (Out of Guarantee)
Test Items
High Temperature Exposure
ESD
Reference
±7.0%
500V
Test Method
125°C, 1000 hours
Human model, 100 pF 1.5 kΩ
11/28/17
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
231
thermal
protection
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