PRF18BA471QB5RB Datasheet, PDF (70/104 Pages) Murata Manufacturing Co., Ltd. – POSISTOR for Circuit Protection

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R90E.pdf
Sep.24,2012
POSISTORr for Circuit Protection
Inrush Current Suppression for High Capacitance (100µF or more)
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.
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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
Max. Resistance Max. Inrush
Voltage (at +25°C) Current
(V)
(ohm)
(A)
PTGL14AS470H0B02BZ 280 47 ±25% 27 peak
Max. Charge
Energy (at +60°C)
(J)
106.9
Max. Charge
Energy (at +85°C)
(J)
56.9
Body
Diameter (D)
(mm)
16.0
Thickness Lead
Lead
(T) Space (F) Diameter (phi d)
(mm)
(mm)
(mm)
6.5
10.0
0.6
PTGL16AS330H0B02BZ 280 33 ±25% 39 peak
130.8
80.8
18.0
6.5
10.0
0.6
PTGL16AS470H0B02BZ 280 47 ±25% 27 peak
130.8
80.8
18.0
6.5
10.0
0.6
PTGL16AS680H0B02BZ 280 68 ±25% 19 peak
130.8
80.8
18.0
6.5
10.0
0.6
PTGL16AS101H0B02BZ 280 100 ±25% 13 peak
130.8
80.8
18.0
6.5
10.0
0.6
PTGL20AS330H0D02BZ 280 33 ±25% 39 peak
181.7
131.7
22.0
6.5
10.0
0.8
PTGL20AS470H0D02BZ 280 47 ±25% 27 peak
181.7
131.7
22.0
6.5
10.0
0.8
Max. inrush current shows the maximum applying time of inrush current value at operating temperature range.
Max charge energy is defined as the maximum charged up energy value of over 95%.
The capacitance is calculated as the following formula.
J=CV^2/2 C: capacitance, V: peak voltage
Note: The criteria of the standard for the maximum charged up energy value of over 95%.
If there is the difference between our definition and yours, could you ask us free?
Operating temperature range is -20 to +85°C.
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