KOA SPEER ELECTRONICS, INC.
SS-254 R2
AHA 12/03/03
Negative Tempco Thermistor
Type NT73
1. Features
s
s
s
s
s
CERTIFIED
Anti-leaching nickel barrier terminations
90/10 solder plated terminations, standard
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
L
Termination
Material
L: SnPb
T: Sn
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
3800
J
B Constant
Tolerance
J: ±5%
K: ±10%
PAGE 1 OF 5
Bolivar Drive
s
P.O. Box 547
s
Bradford, PA 16701
s
USA
s
814-362-5536
s
Fax 814-362-8883
s
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 R2
4. Applications and Ratings
Part
Designation
Resistance
@ 25°C
Resistance
Tolerance
B Constant
@ 25°C/75°C
B Constant
Tolerance
Thermal
Dissipation
Constant
(mW/°C)
Power
Rating
(mW)
Operating
Temperature
Range
NT731J
NT732A
6.8kΩ
10kΩ
15kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
1.0kΩ
2.0kΩ
2.2kΩ
2.4kΩ
3.3kΩ
4.7kΩ
5.0kΩ
6.8kΩ
10kΩ
10kΩ
15kΩ
20kΩ
22kΩ
30kΩ
33kΩ
47kΩ
68kΩ
100kΩ
150kΩ
3500K
±10%
J: ±5%
K: ±10%
3800K
±5%
2
5
3200K
K: ±10%
L: ±15%
3500K
±10%
-55°C
to
+125°C
3800K
3500K
2.8
5
J: ±5%
K: ±10%
L: ±15%
3800K
±5%
PAGE 2 OF 5
Bolivar Drive
s
P.O. Box 547
s
Bradford, PA 16701
s
USA
s
814-362-5536
s
Fax 814-362-8883
s
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 R2
4. Applications and Ratings (Continued)
Part
Designation
Resistance
@ 25°C
Resistance
Tolerance
B Constant
@ 25°C/75°C
B Constant
Tolerance
Thermal
Dissipation
Constant
(mW/°C)
Power
Rating
(mW)
Operating
Temperature
Range
NT732B
1.0kΩ
2.2kΩ
3.3kΩ
4.7kΩ
6.8kΩ
10kΩ
22kΩ
33kΩ
47kΩ
68kΩ
100kΩ
3200K
K: ±10%
L: ±15%
3500K
±10%
-55°C
to
+125°C
3
J: ±5%
K: ±10%
L: ±15%
3800K
±5%
5
5. 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.
PAGE 3 OF 5
Bolivar Drive
s
P.O. Box 547
s
Bradford, PA 16701
s
USA
s
814-362-5536
s
Fax 814-362-8883
s
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 R2
6. Environmental Applications
6.1 Temperature Characteristics
10,000,000
1,000,000
Resistance (Ω)
100,000
10,000
100kΩ
1,000
10kΩ
100
10
-50
-25
0
50
75
25
Temperature (°C)
100
1kΩ
125
6.2 RT/R25 Ratio vs. B Constant
Temperature (°C)
B Constant (K)
3200
3500
3800
Temperature (°C)
B Constant (K)
3200
3500
3800
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
51.45
37.02
27.03
20.00
14.99
11.36
8.71
6.75
5.28
4.17
3.33
2.67
2.17
1.77
1.45
1.20
1.00
0.838
0.706
74.45
51.94
36.82
26.48
19.32
14.27
10.68
8.08
6.18
4.77
3.72
2.93
2.33
1.86
1.50
1.22
1.00
0.824
0.683
107.72
72.87
50.15
35.07
24.90
17.92
13.08
9.66
7.22
5.46
4.17
3.21
2.50
1.97
1.56
1.24
1.00
0.810
0.661
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
0.598
0.509
0.436
0.375
0.323
0.281
0.244
0.214
0.188
0.165
0.146
0.130
0.115
0.103
0.092
0.083
0.075
0.067
0.570
0.478
0.403
0.342
0.291
0.249
0.214
0.185
0.160
0.140
0.122
0.107
0.094
0.083
0.074
0.066
0.058
0.052
0.543
0.448
0.373
0.312
0.262
0.221
0.188
0.160
0.137
0.118
0.102
0.088
0.077
0.067
0.059
0.052
0.046
0.041
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 4 OF 5
Bolivar Drive
s
P.O. Box 547
s
Bradford, PA 16701
s
USA
s
814-362-5536
s
Fax 814-362-8883
s
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 R2
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
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 5 OF 5
Bolivar Drive
s
P.O. Box 547
s
Bradford, PA 16701
s
USA
s
814-362-5536
s
Fax 814-362-8883
s
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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