KOA SPEER ELECTRONICS, INC.
SS-254 R5
AHA 6/01/06
Negative Tempco Thermistor
Type NT73
1. Features
I
I
I
I
CERTIFIED
CERTIFIED
Anti-leaching nickel barrier terminations
Twelve standard resistance values
Suitable for reflow and wave soldering
Marking: Black three-digit on pink body color
2. Dimensions
L
Table 1
c
c
Type
Solder
Plating
L
Dimensions - inches (mm)
W
c
d
.031±.004
(0.8±0.1)
.049±.004
(1.25±0.1)
.063±.008
(1.6±0.2)
.012±.004
(0.3±0.1)
.016±.008
(0.4±0.2)
.02±.008
(0.5±0.3)
.012±.004
(0.3±0.1)
.012
+.008
-.004
+0.2
(0.3
-0.1
)
.016
+.008
-.004
+0.2
(0.4
-0.1
)
t
.02±.004
(0.5±0.1)
.02
+.008
-.004
(0.5
+0.2
)
-0.1
.024±.004
(0.6±0.1)
W
.063±.008
1J
(0603)
(1.6±0.2)
.079±.008
2A
(0805)
(2.0±0.2)
.126±.008
2B
(1206)
(3.2±0.2)
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
Ceramic
Substrate
3. Type Designation
Type designation shall be as the following form.
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%
PAGE 1 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
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.
SS-254 R5
4. 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
6.8kΩ
10kΩ
15kΩ
10kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
150kΩ
50kΩ
10kΩ
15kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
150kΩ
1kΩ
2.2kΩ
3.3kΩ
4.7kΩ
6.8kΩ
10kΩ
22kΩ
33kΩ
47kΩ
68kΩ
100kΩ
Resistance
Tolerance
B Constant
@ 25°C/75°C
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%
-55°C
to
+125°C
4100K
3200K
K: ±10%
L: ±15%
3500K
±10%
3800K
3500K
NT732A
3800K
±5%
2.8
5
-55°C
to
+125°C
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%
5. Environmental Applications
5.1 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
5.2 RT/R25 Ratio vs. B Constant
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
k
Ω
k
Ω
k
Ω
k
Ω
Ω
k
Ω
k
Ω
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
Note: RT/R25 ratio is the resistance at temperature (T) divided by the nominal resistance at 25°C. The RT/R25 ratio value is multiplied
by the thermistor’s nominal 25°C value to determine the nominal resistance value at a given temperature in the chart above.
PAGE 2 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
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.
SS-254 R5
6. Performance Characteristics
Parameter
Maximum
∆
R
Test Method
High Temperature Exposure
Resistance to Solder Heat
Terminal Strength-Bend
Moisture Resistance
Life
Temperature Cycling
Dielectric Withstanding Voltage
2A
2B
Insulation Resistance
±3.0%
±1.0%
±1.0%
±3.0%
±3.0%
±3.0%
1000 hours @ 80°C
MIL-R-55342
π
4.7.7, 260°C for 10 seconds
2mm min. deflection in either direction for 10 seconds
MIL-STD-202, Method 103, 40°C, 90 - 95% RH, 1000 hours
80°C, DC 5mm, 1000 hours
30 minutes @ -55°C, 15 minutes @ +25°C,
30 minutes @ +125°C, 15 minutes @ +25°C, 50 cycles
1 minute minimum
MIL-STD-202, Method 301
—
400V
400V
10,000 MΩ
Minimum
Note: RT/R25 ratio is the resistance at temperature (T) divided by the nominal resistance at 25°C. The RT/R25 ratio value is multiplied
by the thermistor’s nominal 25°C value to determine the nominal resistance value at a given temperature in the chart above.
7. Packaging Information
1.5
+0.1
-0
1.75±0.1
Central hole
B
W
øa
A
ø13
2
ø21
T
1
P
1
(TP)
2.0 4.0±0.1
P
1
T
1
Direction of feed
T
1
Component Size (mm)
Type
L
W
T
Carrier
Tape
Quantity/
Reel
(Pieces)
Taping (mm)
Reel Size
A
B
W
P1
T1
NT73
1J
2A
2B
14.6
2
3.2
0.8
1.25
1.6
0.45
0.5
0.6
TD
TD
TD
5000
5000
5000
1.9±0.1 1.1±0.1 8.0±0.2
2.4±0.2 1.65±0.2 8.0±0.2
3.5±0.2
2±0.2
8.0±0.2
4.0±0.1
4.0±0.1
4.0±0.1
0.6+0.2/-0
0.75+0.2/-0
0.75+0.2/-0
178
178
178
PAGE 3 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
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.
SS-254 R5
8. Pad Dimensions
B
D
A
C
Soldering Pad
Chip Component
NT73
1J
2A
2B
Size
1.6 x 0.8
2.0 x 1.25
3.2 x 1.6
A
0.8
1.2
2.2
B
2.6
3.0
4.2
C
0.8
1.2
1.5
D
0.9
0.9
1.0
PAGE 4 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
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