L
T
linear positive miniature tempco thermistor
EU
features
•
•
•
•
High stability and excellent linearity
Miniature size
Marking: Light-gray body color with color-coded bands
Products with lead-free terminations
meet EU RoHS requirements
thermal
protection
dimensions and construction
L
D
Trimming Line
Ceramic Core
d
l
Type
LT1/6
LT1/4
L (ref.)
.126±.012
(3.2±0.3)
.248±.008
(6.3±0.5)
Dimensions
inches
(mm)
C (max.)
D
d
.146
(3.7)
.280
(7.1)
l
.067±.008 .018±.002
(1.7±0.2) (0.45±0.05)
1.18±.118
.091±.012 .024±.002
(30.0±3.0)
(2.3±0.3) (0.6±0.05)
Marking
Resistive
Film
End
Cap
Lead
Wire
Insulation Coating
C
ordering information
New Part #
LT
Type
1/6
Power
Rating
1/4
1/6
C
Termination
Material
C: SnCu
T26
Taping and
Forming
T26, T52
A
Packaging
A: Ammo
R: Reel
102
Nominal
Resistance
2 significant
figures + 1
multiplier
“R” indicates
decimal on
value <10Ω
J
Tolerance
J: ±5%
3600
T.C.R.
(ppm/˚C)
1000 -
4,500
applications and ratings
T.C.R.
(ppm/°C)*
1000
1200
1400
2000
3600
3900
4200
4500
T.C.R.
Tolerance
Resistance
Range
E-24
(LT1/6S)
100Ω - 20KΩ
100Ω - 9.1KΩ
100Ω - 5.1KΩ
100Ω - 3.3KΩ
100Ω - 750Ω
100Ω - 240Ω
Resistance
Range
E-24
(LT1/4S)
100Ω - 39KΩ
100Ω - 15KΩ
100Ω - 6.8KΩ
100Ω - 6.2KΩ
100Ω - 1KΩ
100Ω - 510Ω
J: ±5%
+70°C
-40°C
to
+125°C
Resistance
Tolerance
Rated
Ambient
Temperature
Operating
Temperature
Range
±15%
±10%
* T.C.R. measuring temperature: +25°C to +75°C
For further information on packaging, please refer to Appendix C.
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
188
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
L
T
linear positive miniature tempco thermistor
environmental applications
Resistance Changing Rate (%)
100
80
% Rated Power
60
40
20
0
-40
50
40
30
20
10
0
-10
-20
-30
-75
-50
-25
0
25
50
75
100
125
2000
1000
TCR (X10
-6
/K)
4500
3600
-20
0
20
40
60
80
70
Ambient Temperature
(°C)
100 120
140
125
Ambient Temperature
(°C)
Approximate Expression for Resistance-Temperature Characteristics
T.C.R.
(x10
-6
/K)
3600
3900
4200
4500
C
0
0.9175
0.9099
0.9026
0.8948
C
1
0.0032
0.0035
0.0038
0.0041
C
2
4.0000
4.0064
3.9964
4.0064
x
x
x
x
10
-6
10
-6
10
-6
10
-6
(Values are not guaranteed but typical)
R
T
=R
25
(C
0
+C
1
T+C
2
T
2
)
R
T
: Resistance value at T°C
R
25
: Resistance value at 25°C
T: Ambient temperature (°C)
C
0
, C
1
, C
2
: Constants
Performance Characteristics
Parameter
Resistance
Overload (Short time)
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
Within specified
—
tolerance
±1%
±0.75%
±1%
±0.75%
±1%
±0.75%
±3%
±2%
±3%
±2%
Test Method
25°C
Rated voltage x 2.5 for 5 seconds
260°C ±5°C, 10 seconds ± 1 second
-40°C (30 minutes), +125°C (30 minutes), 5 cycles
40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
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
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
189
thermal
protection
Derating Curve
Temperature Characteristics of Resistance
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