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PTGL07AR820M9A51B0 Datasheet(PDF) 7 Page - Murata Manufacturing Co., Ltd.

Part # PTGL07AR820M9A51B0
Description  PTC Thermistors for Overcurrent Protection / for Inrush Current Suppression / for Overheat Sensing Lead Type
Download  103 Pages
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Manufacturer  MURATA [Murata Manufacturing Co., Ltd.]
Direct Link  http://www.murata.com
Logo MURATA - Murata Manufacturing Co., Ltd.

PTGL07AR820M9A51B0 Datasheet(HTML) 7 Page - Murata Manufacturing Co., Ltd.

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R90E.pdf
Sep.24,2012
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
5
1. Resistance - Temperature Characteristics
POSISTOR
r has three main characteristics.
Although there is a negligible difference between the
normal and "Curie Point" temperature, POSISTOR
r
shows almost constant resistance-temperature
characteristics. Yet they have resistance-temperature
characteristics that cause resistance to sharply increase
when the temperature exceeds the Curie Point.
The Curie Point (C.P.) is defined as the temperature at
which the resistance value is twice the one at 25°C.
2. Current - Voltage Characteristics (Static Characteristic)
This shows the relation between applied voltage when
voltage applied to POSISTOR
r causes balancing of
inner heating and outer thermal dissipation and stabilized
current. This has both a maximum point of current and
constant output power.
3. Current - Time Characteristics (Dynamic Characteristic)
This shows the relation between current and time before
inner heating and outer thermal dissipation arrive at
equilibrium state. This features having large initial current
and abruptly continuous attenuating portion.
Resistance - Temperature Characteristic
cBasic Characteristics
10
5
10
4
10
3
10
2
10
1
0
50
100
150
200
Temperature (°C)
Current - Voltage Characteristic (Static Characteristic)
Current - Time Characteristic (Dynamic Characteristic)
Ta=25°C
10
10
10
1
3
2
2
0.1
1
10
10
Voltage (V)
1.5
1.0
0.5
Time (sec.)
Ta=25°C
BD BC BB AR
Basic Characteristics of POSISTOR
r
C.P. (AR: 120°C)


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