L
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W
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Temperature Sensing Chip Resistor (P.T.C. Thermistor)
Type LT73 Series
Literature No. 1773244
Issued: 04-05
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
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Key Features
■Stable Alumina Substrate
■Solvent Resistant Coating
■Wide Value Range
■Excellent Linearity
■08 05 Small Size
■Stocked in 3900ppm/°C
■Other TCR's Available to
Order
■Supplied on Tape and Reel
■Custom Design Enquiries
Welcome
Type LT73 Series
This tiny thin film chip is manufactured
by sputtering pure metals onto a high
purity alumina base. This process
ensures the element remains stable in
performance over a long life. The LT73
is equally suited to temperature
compensation or thermal protection
when incorporated within the
appropriate electronics. This range of
sensors are finished in a tough epoxy
seal and are available on tape for high
speed auto placement.
Characteristics -
Electrical
Characteristics -
Mechanical
0805 Size (2A) 1206 Size (2B)
Resistance Range: 510R - 3K0 510R - 6K2
Resistance Tolerance: ±5% ±5%
Rated Power at 70°C: 0.1 watt 0.125 watt
Max. Working Voltage @ TA70°C: 50 volts 75 volts
Max. Overload Voltage @ TA70°C: 100 volts 150 volts
Operating Temperature Range: -40°C ~ +125°C -40°C ~ +125°C
TCR Measuring Temperature: +25°C ~ +75°C (See Graph) +25°C ~ +75°C (See Graph)
TCR Tolerance: ± 10% ± 10%
Insulation Resistance: More than 10 Meg More than 10 Meg
Dimensions
Seal Cover: Orange
Marking Ink Colour: Black
Characteristics -
Cleaning
The washing process is very important to ensure long term reliability because ionic impurity from flux may cause
electrolytic corrosion of the metal film.
Short time Overload: Rated Voltage x 2.5 maximum Overload Voltage for 5 seconds,
whichever is less
Resistance to Soldering Heat: 260°C ± 5°C, 10 seconds ± 1 second
Solderabililty: 235°C ± 5°C, 3 seconds ± 0.5 second
LT73 3900 2A 103 1K0 J
Common Part
3000ppm/°C
3900ppm/°C
T.C.R Size
LT73 - Standard
2A - 0.1W
2B - 0.125W
Resistance Value
J ±5%
Tolerance Pack Style
The first two digits
are significant figures
of resistance value
and the third denotes
the number of zeros
following.
e.g. 510R: 511
1K0: 102
3K0: 302
Taped - 4000
on Reel
How to Order
Chip LWHD d
Weight
Size /1000
2A-0805 2.0±0.2 1.25±0.2 0.5±0.1 0.4±0.2 0.35±0.15 4.54g
2B-1206 3.2±0.2 1.60±0.2 0.6±0.1 0.5±0.3 0.45±0.15 9.14g
Power Derating
-50 -25 0 25 50 75 100 125
Ambient Temperature (°C)
∆R (%)
60
50
40
30
20
10
0
-10
-20
-30
4500
3300
2400
1600
TCR
(ppm/°C)
-55 -25 0 30 60 70 90 120 125
100
80
60
40
20
0
Rated Power (%)
Ambient Temperature (°C)
