184 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. 12/19/12
LT73
linear positive tempco thermistor
features
•Anti-leaching nickel barrier terminations
•Twenty-five specifiable temperature characteristics
•SMD thin film resistor with thermo-perceptivity
•Marking: Black four-digit on bronze body color
•Products with lead-free terminations meet EU RoHS
and China RoHS requirements
TD: 7" paper taping
(5,000 pieces/reel)
TE: 7" embossed plastic
(4,000 pieces/reel)
ordering information
2 significant
figures + 1
multiplier
2A: 0805
2B: 1206
T: Sn
(Other termination
styles available,
contact factory
for options)
G:±2%
J: ±5%
LT73 2B 1000T
Size
Code
Type Resistance
Value Tolerance T.C.R.
Termination
Material Packaging
New Part # TD 101 J
For further information on packaging,
please refer to Appendix A.
dimensions and construction
Protective
Coating
Lc
W
t
dInner
Electrode
Solder
Plating
Ni
Plating
Resistive
Film
Ceramic
Substrate
c
Type
L
.079±.008
(2.0±0.2)
.012 +.008
-.004
(0.3 +0.2)
-0.1
.016 +.008
-.004
(0.4 +0.2)
-0.1
.02±.004
(0.5±0.1)
.024±.004
(0.6±0.1)
.016±.008
(0.4±0.2)
.02±.008
(0.5±0.3)
.063±.008
(1.6±0.2)
.049±.008
(1.25±0.2)
.126±.008
(3.2±0.2)
2A
(0805)
2B
(1206)
(Inch Size Code) Wc d t
Dimensions inches (mm)
EU
thermal
protection
applications and ratings
Power
Rating
Thermal
Time
Constant
Thermal
Dissipation
Constant
Part
Designation
0.1W
LT732A
0.125W
LT322B
1.0s
1.5s
1.37mW/°C
1.47mW/°C
Operating
Temperature
Range
-40°C
to
+125°C
Rated Ambient
Temperature
+70°C
Maximum
Working
Voltage
Maximum
Overload
Voltage
50V
75V
100V
150V
Thermal time constant and dissipation constant are reference values, which are values of elements and vary with connecting or fixing methods.
LT73
linear positive tempco thermistor
applications and ratings
Resistance
Tolerance
T.C.R.
(x10-6/K) T.C.R.
Tolerance
2kΩ - 24kΩ
1kΩ - 20kΩ
1kΩ - 13kΩ
510Ω - 4.7kΩ
510Ω - 4.7kΩ
510Ω - 3.0kΩ
510Ω - 3.0kΩ
100Ω - 1kΩ
51Ω - 510Ω
2kΩ - 51kΩ
G: ±2%150, 250, 350, 450, 500
±100x10-6/K
±150x10-6/K
±15%
±10%
600, 700, 800, 900
1000, 1200, 1400
1600, 1800
2000, 2200, 2400
2600, 2800, 3000
3300, 3600, 3900
4200
4500
J: ±5%
1kΩ - 43kΩ
1kΩ - 27kΩ
1kΩ - 10kΩ
510Ω - 9.1kΩ
510Ω - 6.2kΩ
510Ω - 6.2kΩ
100Ω - 2kΩ
51Ω - 510Ω
Resistance Range
E-24
LT732B
LT732A
Performance Characteristics
Derating Curve
environmental applications
% Rated Power
100
80
60
40
20
-20 0 20406080100120140
12570
Ambient Tempe rature
(°C)
0
-40
Examples of Temperature
Characteristics of Resistance
60
50
20
10
0
-25 0 255075100125
Ambi ent Tem perature
(°C)
-30
-50
4500ppm/°C
40
30
-10
-20
3300ppm/°C
2400ppm/°C
1600ppm/°C
Resistance Changing Rate (∆R)
T.C.R. Measuring Temperature: +25°C ~ +75°C
Approximate Expression for Resistance-Temperature Characteristics
C1C2
3000
3300
3600
3900
4200
4500
0.9288 0.0028 1.9983 x 10-6
2.9980 x 10-6
4.0000 x 10-6
4.0064 x 10-6
3.9964 x 10-6
4.0064 x 10-6
0.0041
0.9232
0.9175
0.9099
0.9026
0.8948
C0
T.C.R.
(x10-6/K)
0.0030
0.0032
0.0035
0.0038
185
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. 12/19/12
Parameter
Requirement ∆ R ±(% + 0.05Ω)
Limit Typical Test Method
Resistance
T.C.R.
25°C
+25°C/+75°C
Within specified
tolerance
Within specified
T.C.R.
—
—
Overload (Short time) Rated voltage x 2.5 or maximum overload volume for 5 seconds, whichever is lower
±1.0% ±0.23%
Resistance to Solder Heat 260°C ± 5°C, 10 seconds ± 1 second
±1.0% ±0.1%
Rapid Change of Temperature -40°C (30 minutes)/ +125°C (30 minutes), 5 cycles
±1.0% ±0.1%
Moisture Resistance 40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0% ±0.54%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3.0% ±0.62%
Confirming resistance drift is recommended since this product has a tendency to have bigger resistance change than general flat chip over 70°C.
Please pay attention not to be applied ESD, it may cause of resistance change.
Test Items
High Temperature Exposure 125°C, 1000 hours
±0.6%
Low Temperature Exposure -40°C, 45 minutes
±0.05%
Reference Test Method
ESD Human model, 100 pF 1.5 kΩ
500V
Actual Value (Out of Guarantee)
thermal
protection
For resistors operated at an ambient temperature
of 70°C or above, a power rating shall be derated
in accordance with the above derating curve.
Rated voltage = √Power Rating x Resistance value or Max. working voltage, whichever is lower.
