PRF18BA471QB5RB Datasheet, PDF (69/104 Pages) Murata Manufacturing Co., Ltd. – POSISTOR for Circuit Protection

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POSISTORr for Circuit Protection
Inrush Current Suppression (Less than 100µF)
R90E.pdf
Sep.24,2012
POSISTORr is one of lead type PTC Thermistor that is able
to support overcurrent or inrush current issue on the power
supply circuit.
It is able to integrated circuit for protection from inrush
current suppression with POSISTORr and relay or
semiconductor switch as thyristor.
c Features
1. Protection against overcurrent situations
2. Automatic reset from protective trip mode
3. Space-saving
4. Various characteristics to meet a suitable resistance
value
c Applications
POSISTORr is an integrated solution to work as both
current limit resistor and overcurrent fuse. It works as a
stable resistor in normal operation and products itself
against overcurrent situation.
It can be replaced from normal resistor or the resistor with
temperature fuses solution as Fig.1.
D max.
T max.
F±1.5
ød±0.05
(in mm)
+
-
Load
POSISTORr
+
-
Load
Fig.1
POSISTORr works as normal resistor in normal condition,
and it works as protector against over current situation on
the circuit.
1. High-power switching power supply (LCD TV)
2. The power supply for inverter on outside unit for
Air-conditioner
3. The power supply for inverter type fluorescent lamp
4. Other SW type power supply
Part Number
PTGL07AS121M0N51B0
Max.
Voltage
(V)
280
Resistance
(at +25°C)
(ohm)
120 ±20%
Max. Inrush
Current
(A)
8.46 peak
Max. Applying
Time of Inrush
(ms)
10
Body
Diameter (D)
(mm)
7.8
Thickness
(T)
(mm)
6.0
PTGL07AS181M0N51B0
280
180 ±20% 6.22 peak
10
7.8
6.0
PTGL07AS201M0N51B0
280
200 ±20% 5.66 peak
10
7.8
6.0
Max. inrush current shows the maximum inrush current value which be introduced into "POSISTOR" at operating temperature range.
Max. applying time of inrush shows the maximum applying time of inrush current value at operating temperature range.
Operating temperature range is -40 to +105°C.
Taping type of part numbers with "A0" is available.
Lead
Space (F)
(mm)
5.0
5.0
5.0
Lead
Diameter (phi d)
(mm)
0.5
0.5
0.5
10
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