LT73
linear positive tempco thermistor
applications and ratings
Resistance
Tolerance
T.C.R.
(x10-6/K) T.C.R.
Tolerance
2kΩ - 24kΩ
1kΩ - 20kΩ
1kΩ - 13kΩ
510Ω - 4.7kΩ
510Ω - 4.7kΩ
510Ω - 3.0kΩ
510Ω - 3.0kΩ
100Ω - 1kΩ
51Ω - 510Ω
2kΩ - 51kΩ
G: ±2%150, 250, 350, 450, 500
±100x10-6/K
±150x10-6/K
±15%
±10%
600, 700, 800, 900
1000, 1200, 1400
1600, 1800
2000, 2200, 2400
2600, 2800, 3000
3300, 3600, 3900
4200
4500
J: ±5%
1kΩ - 43kΩ
1kΩ - 27kΩ
1kΩ - 10kΩ
510Ω - 9.1kΩ
510Ω - 6.2kΩ
510Ω - 6.2kΩ
100Ω - 2kΩ
51Ω - 510Ω
Resistance Range
E-24
LT732B
LT732A
Performance Characteristics
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-20 0 20406080100120140
12570
Ambient Tempe rature
(°C)
0
-40
Examples of Temperature
Characteristics of Resistance
60
50
20
10
0
-25 0 255075100125
Ambi ent Tem perature
(°C)
-30
-50
4500ppm/°C
40
30
-10
-20
3300ppm/°C
2400ppm/°C
1600ppm/°C
Resistance Changing Rate (∆R)
T.C.R. Measuring Temperature: +25°C ~ +75°C
Approximate Expression for Resistance-Temperature Characteristics
C1C2
3000
3300
3600
3900
4200
4500
0.9288 0.0028 1.9983 x 10-6
2.9980 x 10-6
4.0000 x 10-6
4.0064 x 10-6
3.9964 x 10-6
4.0064 x 10-6
0.0041
0.9232
0.9175
0.9099
0.9026
0.8948
C0
T.C.R.
(x10-6/K)
0.0030
0.0032
0.0035
0.0038
185
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. 12/19/12
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 overload volume for 5 seconds, whichever is lower
±1.0% ±0.23%
Resistance to Solder Heat 260°C ± 5°C, 10 seconds ± 1 second
±1.0% ±0.1%
Rapid Change of Temperature -40°C (30 minutes)/ +125°C (30 minutes), 5 cycles
±1.0% ±0.1%
Moisture Resistance 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0% ±0.54%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0% ±0.62%
Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 70°C.
Please pay attention not to be applied ESD, it may cause of resistance change.
Test Items
High Temperature Exposure 125°C, 1000 hours
±0.6%
Low Temperature Exposure -40°C, 45 minutes
±0.05%
Reference Test Method
ESD Human model, 100 pF 1.5 kΩ
500V
Actual Value (Out of Guarantee)
thermal
protection
For resistors operated at an ambient temperature
of 70°C or above, a power rating shall be derated
in accordance with the above derating curve.
Rated voltage = √Power Rating x Resistance value or Max. working voltage, whichever is lower.