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| 型号： | PRF21BE471QB5RA |
| 厂商： | Murata Electronics North America |
| 文件页数： | 66/105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.
PTGL Series Narrow Current Band Speci?cations and Test Methods
R90E.pdf
Mar.4,2014
No.
1
2
Item
Operating Temperature
Storage Temperature
-30 to +85°C
-40 to +125°C
Rating Value
Method of Examination
The temperature range with maximum voltage applied to the
POSISTOR r .
The temperature range with zero voltage.
Resistance value is measured by applying voltage under 1.0Vdc
3
Resistance Value (at 25°C)
Satisfies ratings
(by a direct current of less than 10mA) at 25°C. But it must be
measured after maximum voltage is applied for 180 seconds and
then is left for 2 hours at 25°C.
We apply AC voltage 120% that of the maximum voltage to
POSISTOR r by raising voltage gradually for 180±5 seconds at
4
Withstanding Voltage
No problem
25°C. (A protective resistor is to be connected in series, and
the inrush current through POSISTOR r must be limited below
maximum rated value.)
Maximum current is measured in this examination. Voltage is
5
Protective Threshold Current
Satisfies ratings
(Trip Current, Hold Current)
applied to POSISTOR r for 3 minutes step by step on still air
based on "Protective Threshold Current Test Conditions"
shown in next page. Stable current is measured at each step.
The load is gradually applied to each terminal of POSISTOR r
until the force of the following table in the axial direction with
fixing POSISTOR r 's body itself and this load is kept for 10
6
Tensile Strength of Lead
Wire Terminal
No damage
seconds.
Lead Diameter
?0.60mm max.
?0.65mm min.
Force
4.90N
9.80N
POSISTOR r is held so that it is perpendicular to the lead wire
with the following lead hanging in the axial direction of the lead
wire.
The lead wire is slowly bent to 90° and returned.
7
Bending Strength of Lead
Wire Terminal
Lead wire does not come off
Then it is slowly bent in the opposite direction and returned to
original state.
Lead Diameter
Force
?0.60mm max.
2.45N
?0.65mm min.
4.90N
The Lead wire of POSISTOR r is soaked in an Isopropyl
Solder is applied around the lead wire covering 3/4
Alcohol (JIS K 8839) solution (about 25wt%) of colophony (JIS
8
Solderability
or more of the circumference without gap in the axial
direction.
K 5902) for 5-10 sec. Each lead wire is soaked in molten solder
(JIS Z 3282 H60A) at 235±5°C from the bottom to a point of
2.0-2.5mm for 2±0.5 seconds.
The lead wire of POSISTOR r is soaked in molten solder (JIS Z
9
Terminal Durability of
Soldering
Δ R/R25 V ±15%
3282 H60A) at 350±10°C from the bottom to a point of
2.0-2.5mm for 3.5±0.5 seconds.
After the device is left at room temperature (25°C) for 24±4
hours, the resistance is then measured.
POSISTOR r is set in an environmental chamber at 60±2°C
10 Humidity Test
Δ R/R25 V ±20%
and 90-95% humidity for 500±4 hours.
After the device is left at room temperature (25°C) for one hour,
the resistance measurement is then performed.
POSISTOR r is set in an environmental chamber at 85±3°C
with maximum voltage applied for 500±4 hours. After the
11
Load Test at High
Temperature
Δ R/R25 V ±20%
device is left at room temperature (25°C) for one hour, the
resistance measurement is performed. (A protective resistor is
to be connected in series and the inrush current through
POSISTOR r must be limited below maximum rated value.)
POSISTOR r is set at room temperature (25±2°C) with
maximum voltage applied for 1 minute and then is left without
voltage applied for 5 minutes. This cycle is repeated for 100
12
Load Cycle Test at Room
Temperature
Δ R/R25 V ±20%
cycles, and after the device is left at room temperature (25°C)
for one hour, the resistance measurement is performed. (A
protective resistor is to be connected in series and the inrush
current through POSISTOR r must be limited below maximum
rated value.)
Continued on the following page.
64
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