KOA SPEER ELECTRONICS, INC.
SS-250 R3
AHA 6/01/06
Thick Film Linear Positive
Tempco Thermistor
LA73 Type
1. Features
I
Anti-leaching nickel barrier terminations
I
Twenty-five specifiable temperature characteristics
I
CERTIFIED
CERTIFIED
Marking: Black three-digit on orange
body color
2. Dimensions
Table 1
Part
1E (0402)
Solder
Plating
Ni
Plating
c
L
c
L
0.039±0.004
(1.0±0.1)
0.063±0.008
(1.6±0.2)
0.079±0.008
(2.0±0.2)
0.126±0.008
(3.2±0.2)
Dimensions - inches (mm)
W
c
0.012±0.004
(0.5±0.1)
0.031±0.004
(0.8±0.1)
0.049±0.004
(1.25±0.1)
0.063±0.008
(1.6±0.2)
0.008±0.004
(0.2±0.1)
0.012±0.004
(0.3±0.1)
0.016±0.008
(0.4±0.2)
0.02±0.008
(0.5±0.3)
d
t
0.014±0.004
(0.35±0.1)
0.02±0.004
(0.5±0.1)
0.02±0.004
(0.5±0.1)
0.024±0.004
(0.6±0.1)
W
0.01±0.004
(0.25±0.1)
0.012±0.004
(0.3±0.1)
+0.008
0.012±...
..
-0.004
+0.2
(0.3±
-0.1
)
+0.008
0.016±...
..
-0.004
+0.2
(0.4±
-0.1
)
t
d
Protective
Coating
Resistive Inner
Film
Electrode
1J (0603)
2A (0805)
2B (1206)
Ceramic
Substrate
3. Type Designation
The type designation shall be in the following form:
LA73
Type
1J
Size Code
1E: 0402
1J: 0603
2A: 0805
2B: 1206
T
Termination
Material
T: Sn
(Other termination
styles available,
contact factory
for options)
TD
Packaging
TP: 7" Embossed Plastic
2mm pitch
(1E only: 10,000 pcs/reel)
TD: 7" paper
(5,000 pieces/reel)
101
Resistance
Value
2 significant
figures + 1
multiplier
J
Tolerance
J: ±5%
3300
T.C.R.
PAGE 1 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
KOA SPEER ELECTRONICS, INC.
SS-250 R3
4. Standard Applications
Table 1
Part
Designation
LA731E
LA731J
LA732A
LA732B
Thermal Dissipation
Constant (mW/°C)
6.8
7.6
+70°C
8.2
9.0
-55°C to +125°C
Rated
Ambient Temp.
Operating
Temp. Range
Table 2
Resistance Range
E-12
LA731E
1.2KΩ - 2.2KΩ
1.2KΩ - 2.2KΩ
—
—
—
—
—
—
—
—
—
—
—
—
—
LA731J
—
—
1KΩ - 10KΩ
680Ω - 6.8KΩ
470Ω - 4.7KΩ
470Ω - 3.9KΩ
330Ω - 2.7KΩ
330Ω - 2.7KΩ
220Ω - 1.8KΩ
100Ω - 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
100Ω - 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
100Ω - 1.2KΩ
100Ω - 1.2KΩ
100Ω - 390Ω
68Ω - 220Ω
33Ω - 120Ω
22Ω - 82Ω
Resistance
Tolerance
T.C.R.
(ppm/°C)
Max.
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3300
3600
T.C.R.
Tolerance
±100ppm/°C
J: ±5%
±5%
PAGE 2 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
KOA SPEER ELECTRONICS, INC.
SS-250 R3
6. Environmental Applications
6.1 Derating Curve
100
80
% Rated Power
60
40
20
0
-60 -40
-55
Resistance Changing Rate (∆R)
40
30
20
10
0
-10
-20
-30
-40
-75
-50
-25
0
25
50
75
100
125
6.2 Temperature Characteristics
3600ppm/°C
3000ppm/°C
2000ppm/°C
1000ppm/°C
-20
0
20
40
60
80
70
Ambient Temperature
(°C)
100 120
140
125
Ambient Temperature
(°C)
7. 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
8. Characteristics
Parameter
Resistance
T.C.R.
Short Time Overload
Resistance to Solder Heat
Solderability
Bending Test
Temperature Cycling
Moisture Resistance
Load Life
Requirement
∆
R
Within regulated tolerance
Within specified T.C.R.
±(1.0% + 0.1Ω): 1J, 2A, 2B
±(3.0% + 0.1Ω): 1E
95% coverage minimum
±(1.0% + 0.1Ω): 1J, 2A, 2B
±(3.0% + 0.1Ω): 1E
±(3.0% + 0.1Ω): 1J, 2A, 2B
±(5.0% + 0.1Ω): 1E
Test Method
25°C
+25°C/+75°C
Rated voltage x 2.5 or max. working voltage x 2
for 5 seconds, whichever is less
260°C ± 5°C, 10 seconds ± 1 second
235°C ± 5°C, 2 seconds ± 0.5 seconds
Width of holding point 90mm, bending 3mm, 1 time
-55°C (30 minutes), +125°C (30 minutes), 100 cycles
40°C ± 2°C, 90 - 95% RH, 1000 hours, rated voltage load
70°C ± 3°C, 1000 hours, rated voltage load
PAGE 3 OF 4
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
KOA SPEER ELECTRONICS, INC.
SS-250 R3
9. Packaging Specifications
(Notes) Dotted lines are applicable to only "TP."
Dimensions - inches (mm)
Style
1E
2A
2B
1J
A
0.14±0.008
(3.5±0.2)
0.75±0.004
(1.9±0.1)
0.94±0.008
(2.4±0.2)
0.45±0.004
(1.15±0.1)
B
0.78±0.008
(2±0.2)
0.043±0.004
(1.1±0.1)
0.065±0.008
(1.65±0.2)
0.026±0.004
(0.65±0.1)
0.31±0.008
(8.0±0.2)
0.16±0.004
(4.0±0.1)
W
P
1
T
1
0.03+0.008/-0
(0.75+0.2/-0)
0.024+0.008/-0
(0.6+0.2/-0)
0.03+0.008/-0
(0.75+0.2/-0)
0.78±0.002
(2.0±0.05)
0.018+0.004/-0
(0.45+0.1/-0)
(Notes) Reel holes, shapes and design are examples
Dimensions - inches (mm)
Style
1E
2A
2B
1J
PAGE 4 OF 4
Bolivar Drive
I
Tape
TP
Punched
Carrier
TD
øa
B
D
ød
7±.078
(178±2)
2.36±.078
(60±2)
0.35±.059
(9±1.5)
.83
(21)
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
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