PRF18BA471QB5RB Datasheet, PDF (66/104 Pages) Murata Manufacturing Co., Ltd. – POSISTOR for Circuit Protection

!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.
PTGL Series Narrow Current Band Specifications and Test Methods
R90E.pdf
Sep.24,2012
No.
Item
1 Operating Temperature
2 Storage Temperature
-30 to +85°C
-40 to +125°C
Rating Value
3 Resistance Value (at 25°C)
Satisfies ratings
4 Withstanding Voltage
No problem
5 Protective Threshold Current
Satisfies ratings
(Trip Current, Hold Current)
6
Tensile Strength of Lead
Wire Terminal
No damage
Method of Examination
The temperature range with maximum voltage applied to the
POSISTORr.
The temperature range with zero voltage.
Resistance value is measured by applying voltage under 1.0Vdc
(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
POSISTORr by raising voltage gradually for 180±5 seconds at
25°C. (A protective resistor is to be connected in series, and
the inrush current through POSISTORr must be limited below
maximum rated value.)
Maximum current is measured in this examination. Voltage is
applied to POSISTORr 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 POSISTORr
until the force of the following table in the axial direction with
fixing POSISTORr's body itself and this load is kept for 10
seconds.
Lead Diameter
ø0.60mm max.
ø0.65mm min.
Force
4.90N
9.80N
7
Bending Strength of Lead
Wire Terminal
Lead wire does not come off
POSISTORr 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.
Then it is slowly bent in the opposite direction and returned to
original state.
Lead Diameter
ø0.60mm max.
ø0.65mm min.
Force
2.45N
4.90N
8 Solderability
9
Terminal Durability of
Soldering
10 Humidity Test
11
Load Test at High
Temperature
12
Load Cycle Test at Room
Temperature
Solder is applied around the lead wire covering 3/4
or more of the circumference without gap in the axial
direction.
The Lead wire of POSISTORr is soaked in an Isopropyl
Alcohol (JIS K 8839) solution (about 25wt%) of colophony (JIS
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.
ΔR/R25V±15%
The lead wire of POSISTORr is soaked in molten solder (JIS Z
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.
ΔR/R25V±20%
POSISTORr is set in an environmental chamber at 60±2°C
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.
ΔR/R25V±20%
POSISTORr is set in an environmental chamber at 85±3°C
with maximum voltage applied for 500±4 hours. 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
POSISTORr must be limited below maximum rated value.)
ΔR/R25V±20%
POSISTORr 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
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 POSISTORr must be limited below maximum
rated value.)
Continued on the following page.
64