KOA SPEER ELECTRONICS, INC.
SS-251 R1
AHA 4/20/05
Linear Positive Tempco Thermistor
Type LT73
1. General
I
Anti-leaching nickel barrier terminations
I
Twenty-five specifiable temperature
characteristics
I
I
CERTIFIED
CERTIFIED
SMD thin film resistor with thermo-perceptivity
Marking: black four-digit on bronze body color
2. Dimensions
W
c
L
c
Solder
Plating
Ni
Plating
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Table 1
Part
2A
(0805)
2B
(1206)
Ceramic
Substrate
L
0.079±0.008
(2.00±0.20)
0.126±0.008
(3.20±0.20)
Dimensions - inches (mm)
c
W
0.049±0.008
(1.25±0.20)
0.063±0.008
(1.60±0.20)
0.016±0.008
(0.40±0.20)
0.020±0.012
(0.50±0.30)
d
t
0.020±0.004
(0.50±0.10)
0.024±0.004
(0.60±0.10)
0.012
+.008
.
-.004
+.20
(0.30
-.10
)
0.016
+.008
.
-.004
+.20
(0.40
-.10
)
3. Type Designation
The type designation shall be in the following form:
New Type
LT73
Type
2B
Size
2A: 0805
2B: 1206
T
Termination
Material
T: Sn
L: SnPb
TD
Packaging
TD: 7" Paper Taping
5,000 pcs/reel
TE: 7" Embossed Plastic
4,000 pcs/reel
101
Resistance
Value
2 significant
figures +
1 multiplier
J
Tolerance
G: ±2%
J: ±5%
1000
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 pr ior notice. Please confir m technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
SS-251 R1
4. Standard Applications
Part
Designation
Power
Rating
@ 70°C
Absolute
Maximum
Working
Voltage
Absolute
Operating
Maximum
Temp.
Overload
Range
Voltage
Resistance Range
E-24*
LT732A
2KΩ - 24KΩ
1KΩ - 20KΩ
1KΩ - 13KΩ
510Ω - 4.7KΩ
510Ω - 4.7KΩ
510Ω - 3.0KΩ
510Ω - 3.0KΩ
510Ω - 3.0KΩ
100Ω - 1KΩ
51Ω - 510Ω
LT732B
2KΩ - 51KΩ
1KΩ - 43KΩ
1KΩ - 27KΩ
1KΩ - 10KΩ
510Ω - 9.1KΩ
510Ω - 6.2KΩ
510Ω - 6.2KΩ
510Ω - 6.2KΩ
100Ω - 2KΩ
51Ω - 510Ω
G: ±2%
Resistance
Tolerance
T.C.R.
(ppm/°C)
Maximum**
T.C.R.
Tolerance
LT732A
100mW
50V
100V
-40°C
to
+125°C
J: ±5%
LT732B
125mW
75V
150V
150, 250, 350, 450, 500 ±100ppm/°C
600, 700, 800, 900
±150ppm/°C
1000, 1200, 1400
±15%
1600, 1800
2000, 2200, 2400
2600, 2800
3000, 3300, 3600
±10%
3900
4200
4500
* See Appendix D for available decade values.
** T.C.R. is factory tested from 25°C to 75°C.
5. Environmental Applications
5.1 Derating Curve
100
80
% Rated Power
60
40
20
0
-40
-20
0
80
70
Ambient Temperature
(°C)
20
40
60
100 120
140
125
5.2 Temperature Characteristics
Resistance Changing Rate (∆R)
10
8
6
500ppm/°C
1000ppm/°C
Resistance Changing Rate (∆R)
60
50
40
30
20
10
0
-10
-20
-30
-50
-25
0
25
50
75
100
125
3300ppm/°C
2400ppm/°C
1600ppm/°C
4500ppm/°C
4
2
0
-2
-4
-6
-8
-50
-25
0
25
50
75
100
125
150ppm/°C
Ambient Temperature
(°C)
Ambient Temperature
(°C)
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 pr ior notice. Please confir m technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
SS-251 R1
6. Approximate Expression for Resistance-Temperature Characteristics
T.C.R.
(x10
-6
/K)
3000
3300
3600
3900
4200
4500
C
0
0.934
0.927
0.921
0.915
0.909
0.903
C
1
0.00258
0.00282
0.00306
0.00330
0.00353
0.00377
C
2
2.77 x 10
-6
3.17 x 10
-6
3.58 x 10
-6
4.00 x 10
-6
4.44 x 10
-6
4.89 x 10
-6
7. Performance Characteristics
Parameter
Thermal Shock
Low Temperature Operation
High Temperature Exposure
Short Time Overload
Resistance to Solder Heat
Terminal Strength-Bend
Moisture Resistance
Life
Temperature Cycling
Maximum
∆
R
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±3.0%
±3.0%
±1.0%
Test Method
MIL-STD-202, Method 107, -55°C to +155°C, 5 cycles
MIL-R-55342
π
4.7.4, 1 Hour @ -55°C followed by
45 minutes of RCWV*
MIL-R-55342
π
4.7.6, 100 hours @ 125°C
MIL-R-55342
π
4.7.5, 2.5 x RCWV for 5 seconds
MIL-R-55342
π
4.7.7, 260°C for 10 seconds
2mm min. deflection in either direction for 10 seconds
MIL-STD-202, Method 103, 40°C, 90 - 95% RH,
1000 hours
MIL-STD-202, Method 108, 70°C, 1000 hours @ RCWV,
1.5 hr ON, 0.5 hr OFF
30 minutes @ -55°C, 15 minutes @ +25°C,
30 minutes @ +125°C, 15 minutes @ +25°C, 5 cycles
* RCWV = Rated Continuous Working Voltage
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 pr ior notice. Please confir m technical specifications before you order and/or use.
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