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LA731J Datasheet(PDF) 2 Page - KOA Speer Electronics, Inc.

Part No. LA731J
Description  thick film linear positive tempco thermistor
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Maker  KOA [KOA Speer Electronics, Inc.]
Homepage  http://www.koaspeer.com
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LA73
thick film linear positive tempco thermistor
Thermal
Dissipation
Constant
(mW/°C)
Rated
Ambient
Temp.
Max.
Working
Voltage (V)
applications and ratings
Part
Designation
Resistance
Tolerance
T.C.R.
Tolerance
T.C.R.
(ppm/°C)
Max.
1K
Ω - 10KΩ
680
Ω - 6.8KΩ
470
Ω - 4.7KΩ
470
Ω - 3.9KΩ
330
Ω - 2.7KΩ
330
Ω - 2.7KΩ
220
Ω - 1.8KΩ
220
Ω - 1.2KΩ
100
Ω - 1.2KΩ
100
Ω - 390Ω
68
Ω - 220Ω
33
Ω - 120Ω
22
Ω - 82Ω
1K
Ω - 10KΩ
680
Ω - 6.8KΩ
470
Ω - 4.7KΩ
470
Ω - 3.9KΩ
330
Ω - 2.7KΩ
330
Ω - 2.7KΩ
220
Ω - 1.8KΩ
220
Ω - 1.2KΩ
100
Ω - 1.2KΩ
100
Ω - 390Ω
68
Ω - 220Ω
33
Ω - 120Ω
22
Ω - 82Ω
1K
Ω - 10KΩ
680
Ω - 6.8KΩ
470
Ω - 4.7KΩ
470
Ω - 3.9KΩ
330
Ω - 2.7KΩ
330
Ω - 2.7KΩ
220
Ω - 1.8KΩ
220
Ω - 1.2KΩ
100
Ω - 1.2KΩ
100
Ω - 390Ω
68
Ω - 220Ω
33
Ω - 120Ω
22
Ω - 82Ω
Resistance Range
E-12
LA731J
LA732A
LA732B
J: ±5%
±200ppm/°C
±10%
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3300
3600
7.6
LA731J
8.2
LA732A
9.0
25
50
50
+70°C
LA732B
Performance Characteristics
Derating Curve
Temperature Characteristics
environmental applications
100
80
60
40
20
-60
-40
-20
0
406080100140
70
20
Ambient Temperature
(°C)
0
-55
120
125
40
30
0
-10
-50
-25
0
5075100125
Ambient Temperature
(°C)
-40
-75
3600ppm/°C
20
10
-20
-30
3000ppm/°C
2000ppm/°C
1000ppm/°C
25
PMS 300 neg.
Black neg.
Approximate Expression for Resistance-Temperature Characteristics
C1
C2
3000
3300
3600
0.926
0.00294
1.1 x 10-7
4.1 x 10-7
1.7 x 10-7
0.918
0.910
C0
T.C.R.
(x10-6/K)
0.00325
0.00359
(Values are not guaranteed but typical)
RT=R25 (C0+C1T+C2T2)
RT: Resistance value at T°C
R25: Resistance value at 25°C
T: Ambient temperature (°C)
C0, C1, C2: Constants
Operating Temp. Range: -55°C - +125°C
151
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • 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.
12/31/08
Parameter
Requirement
∆ R ±(% + 0.05Ω)
Limit
Typical
Test Method
Resistance
T.C.R.
25°C
+25°C/+75°C
Within specified
tolerance
Within specified
T.C.R.
Overload (Short time)
Rated voltage x 2.5 or maximum working volume x 2 for 5 seconds, whichever is lower
±1.0%
±0.5%
Resistance to Solder Heat
260°C ± 5°C, 10 seconds ± 1 second
±1.0%
±0.5%
Rapid Change of Temperature
-55°C (30 minutes)/ +125°C (30 minutes), 100 cycles
±1.0%
±0.5%
Moisture Resistance
40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0%
±1.5%
Endurance at 70°C
70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0%
±1.5%
High Temperature Exposure
-40°C, 45 minutes
±3% (Ref)
1733 Reader's Spreads pg1-203:document
1/27/09
4:11 PM
Page 149




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