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参数资料
| 型号： | PRF21BE471QB5RA |
| 厂商： | Murata Electronics North America |
| 文件页数： | 70/105页 |
| 文件大小： | 0K |
| 描述： | THERMISTOR |
| 标准包装： | 4,000 |
| 系列： | PRF18/21 |
| 在 25°C 时的电阻（欧姆）： | 470 |
| 电阻公差： | ±50% |
| 工作温度： | -20°C ~ 100°C |
| 安装类型： | PCB，表面贴装 |
| 封装/外壳： | 芯片 |
| 供应商设备封装： | * |
| 包装： | * |
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! 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 speci?cations. Therefore, please approve our product speci?cations or transact the approval sheet for product speci?cations before ordering.
POSISTOR r for Circuit Protection
Inrush Current Suppression for High Capacitance (100μF or more)
R90E.pdf
Mar.4,2014
POSISTOR r 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 POSISTOR r and relay or
semiconductor switch as thyristor.
c Features
D max.
T max.
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
POSISTOR r 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.
POSISTOR r
+
+
F±1.5
?d±0.05
(in mm)
-
Load
-
Load
Fig.1
POSISTOR r works as normal resistor in normal condition,
and it works as protector against over current situation on
the circuit.
11
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
Max.
Resistance Max. Inrush
Max. Charge
Max. Charge
Body
Thickness
Lead
Lead
Part Number
Voltage
(at +25°C)
Current
Energy (at +60°C)
Energy (at +85°C)
Diameter (D)
(T)
Space (F) Diameter (phi d)
(V)
(ohm)
(A)
(J)
(J)
(mm)
(mm)
(mm)
(mm)
PTGL14AS470H0B02BZ
PTGL16AS330H0B02BZ
PTGL16AS470H0B02BZ
PTGL16AS680H0B02BZ
PTGL16AS101H0B02BZ
PTGL20AS330H0D02BZ
PTGL20AS470H0D02BZ
280
280
280
280
280
280
280
47 ±25%
33 ±25%
47 ±25%
68 ±25%
100 ±25%
33 ±25%
47 ±25%
27 peak
39 peak
27 peak
19 peak
13 peak
39 peak
27 peak
106.9
130.8
130.8
130.8
130.8
181.7
181.7
56.9
80.8
80.8
80.8
80.8
131.7
131.7
16.0
18.0
18.0
18.0
18.0
22.0
22.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
10.0
10.0
10.0
10.0
10.0
10.0
10.0
0.6
0.6
0.6
0.6
0.6
0.8
0.8
Max. inrush current shows the maximum applying time of inrush current value at operating temperature range.
Max charge energy is de?ned 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 de?nition and yours, could you ask us free?
Operating temperature range is -20 to +85°C.
68
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