LA73
thick film linear positive tempco thermistor
EU
features
•
•
•
•
Anti-leaching nickel barrier terminations
Twenty-five specifiable temperature characteristics
Marking: Black three-digit on orange body color
Products with lead-free terminations meet EU RoHS
requirements. Pb located in glass material, electrode
and resistor element is exempt per Annex 1, exemption
5 of EU directive 2005/95/EC
circuit
protection
dimensions and construction
c
L
c
Type
(Inch Size Code)
L
Dimensions
inches
(mm)
W
c
d
t
W
Solder
Plating
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
1J
(0603)
2A
(0805)
2B
(1206)
.063±.008 .031±.004 .012±.004 .012±.004 .018±.004
(1.6±0.2)
(0.8±0.1)
(0.3±0.1) (0.45±0.1)
(0.3±0.1)
.079±.008 .049±.004 .016±.008
(2.0±0.2) (1.25±0.1) (0.4±0.2)
.126±.008 .063±.008
(3.2±0.2)
(1.6±0.2)
.02±.008
(0.5±0.3)
.012
(0.3
.016
(0.4
+.008
-.004
+0.2
)
-0.1
+.008
-.004
+0.2
)
-0.1
.02±.004
(0.5±0.1)
.024±.004
(0.6±0.1)
Ceramic
Substrate
ordering information
New Part #
LA73
Type
1J
Size
Code
1J: 0603
2A: 0805
2B: 1206
T
Termination
Material
T: Sn
(Other termination
styles available,
contact factory
for options)
TD
Packaging
TD: 7" paper
(5,000 pieces/reel)
101
Resistance
Value
2 significant
figures + 1
multiplier
J
Tolerance
J: ±5%
3300
T.C.R.
For further information on packaging,
please refer to Appendix A.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/20/08
150
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
LA73
thick film linear positive tempco thermistor
applications and ratings
Thermal
Rated
Max.
Part
Dissipation
Ambient Working
Designation Constant
Temp. Voltage (V)
(mW/°C)
LA731J
7.6
25
Resistance Range
E-12
LA731J
1KΩ - 10KΩ
680Ω - 6.8KΩ
470Ω - 4.7KΩ
470Ω - 3.9KΩ
330Ω - 2.7KΩ
330Ω - 2.7KΩ
220Ω - 1.8KΩ
220Ω - 1.2KΩ
100Ω - 1.2KΩ
100Ω - 390Ω
68Ω - 220Ω
33Ω - 120Ω
22Ω - 82Ω
LA732A
1KΩ - 10KΩ
680Ω - 6.8KΩ
470Ω - 4.7KΩ
470Ω - 3.9KΩ
330Ω - 2.7KΩ
330Ω - 2.7KΩ
220Ω - 1.8KΩ
220Ω - 1.2KΩ
100Ω - 1.2KΩ
100Ω - 390Ω
68Ω - 220Ω
33Ω - 120Ω
22Ω - 82Ω
LA732B
1KΩ - 10KΩ
680Ω - 6.8KΩ
470Ω - 4.7KΩ
470Ω - 3.9KΩ
330Ω - 2.7KΩ
330Ω - 2.7KΩ
220Ω - 1.8KΩ
220Ω - 1.2KΩ
100Ω - 1.2KΩ
100Ω - 390Ω
68Ω - 220Ω
33Ω - 120Ω
22Ω - 82Ω
Resistance
Tolerance
T.C.R.
(ppm/°C)
Max.
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3300
3600
T.C.R.
Tolerance
circuit
protection
±200ppm/°C
LA732A
8.2
+70°C
50
J: ±5%
LA732B
9.0
50
±10%
Operating Temp. Range: -55°C - +125°C
environmental applications
Derating Curve
100
80
% Rated Power
60
40
20
0
-60 -40
-55
Temperature Characteristics
Resistance Changing Rate (∆R)
40
30
20
10
0
-10
-20
-30
-40
-75
-50
-25
0
25
50
75
100
125
3600ppm/°C
3000ppm/°C
2000ppm/°C
1000ppm/°C
-20
0
80
70
Ambient Temperature
(°C)
20
40
60
100 120
140
125
Ambient Temperature
(°C)
Approximate Expression for Resistance-Temperature Characteristics
T.C.R.
(x10
-6
/K)
3000
3300
3600
C
0
0.926
0.918
0.910
C
1
0.00294
0.00325
0.00359
C
2
1.1 x 10
-7
4.1 x 10
-7
1.7 x 10
-7
(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
T.C.R.
Overload (Short time)
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
High Temperature Exposure
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
±1.0%
±0.5%
±1.0%
±0.5%
±1.0%
±0.5%
±3.0%
±1.5%
±3.0%
±1.5%
—
±3% (Ref)
Test Method
25°C
+25°C/+75°C
Rated voltage x 2.5 or maximum working volume x 2 for 5 seconds, whichever is lower
260°C ± 5°C, 10 seconds ± 1 second
-55°C (30 minutes)/ +125°C (30 minutes), 100 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
-40°C, 45 minutes
12/31/08
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.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
151
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