LT
linear positive miniature tempco thermistor
Performance Characteristics
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-20 0 20406080100120140
12570
Ambient Te mperature
(°C)
0
-40
Temperature Characteristics of Resistance
50
40
10
0
-50 -25 0 5075100125
Ambient Te mperature
(°C)
-30
-75
4500
30
20
-10
-20
3600
2000
1000
Resistance Changing Rate (%)
25
TCR (X10-6/K)
Approximate Expression for Resistance-Temperature Characteristics
C1C2
3600 4.0000 x 10-6
0.9175
C0
T.C.R.
(x10-6/K)
0.0032
(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
4200
4500
0.9026 0.0038 3.9964 x 10-6
4.0064 x 10-6
0.8948 0.0041
3900 4.0064 x 10-6
0.9099 0.0035
189
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. 12/29/08
Parameter
Requirement ∆ R ±(% + 0.05Ω)
Limit Typical Test Method
Resistance 25°C
Within specified
tolerance —
Overload (Short time) Rated voltage x 2.5 for 5 seconds
±1% ±0.75%
Resistance to Solder Heat 260°C ±5°C, 10 seconds ± 1 second
±1% ±0.75%
Rapid Change of Temperature -40°C (30 minutes), +125°C (30 minutes), 5 cycles
±1% ±0.75%
Moisture Resistance 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3% ±2%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3% ±2%
thermal
protection