PRF18BE471RB5RB datasheet(23/104 Pages) MURATA

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Chip Type Speciﬁcations and Test Methods

(*) The resistance measurement after the test.

After leaving for 24 hours or more in 25±2°C, it measures by 4 wire measuring methods using the direct-current terminal current of 10mA or less (0.1 or

less Vdcs).

Above mentioned soldering in "4. Adhesive Strength" and "5. Vibration" is done under the following conditions at our site.

#Glass-Epoxy PC board

#Standard land dimension

#Standard solder paste

#Standard solder profile

Above conditions are mentioned in Notice.

60±3°C (in air), PTC is applied maximum operating voltage for

1.5 hrs. on and 0.5 hrs. off. This cycle is repeated for 500±10 hrs.

High Temperature Load

JIS C 5102 term 9.3

Times: 5 cycles

Temperature Cycling

60±2°C, 90-95%RH leave for 500±4 hrs.

Damp Heat

-10±3°C leave for 1000±12 hrs.

Cold

60±3°C leave for 1000±12 hrs.

Dry Heat

Normal appearance

Resistance change: not to exceed ±20% (*)

Solder: Sn-3Ag-0.5Cu

Flax: Solder paste containing less than 0.2wt% of chlorine.

Preheating: 150±5°C 3 mins.

Peak temp.: 260±5°C 10±5 secs. (reflow)

PCB: Glass Epoxy PCB (JIS C 6484)

Soldering Heat Resistance

Normal appearance

Resistance change: not to exceed ±20% (*)

JIS C 5102 term 8.4

Solder: Sn-3Ag-0.5Cu

Solder temp: 245±5°C

Soaking time: 3±0.5 secs.

Soaking position: Until a whole electrode is soaked.

Solderability

Min. 75% electrode is covered with new solder.

Resistance change: not to exceed ±20% (*)

JIS C 5102 term 8.2

Soldered PTC to PCB

Vibration: A 10-55-10Hz (1 min.)

Width: 1.5mm

Vibrate for 2 hrs. in each of 3 mutually perpendicular planes for

a total of 6 hrs.

Vibration

Normal appearance

Resistance change: not to exceed ±20% (*)

EIAJ ET-7403 term 9

Soldered PTC to PCB and add a force of 5.0N in the direction

as shown below.

Adhesive Strength

There is no sign of exfoliation on electrode.

We apply 120% of the maximum operating voltage to PTC by

raising gradually for 180±5 secs. at 25°C. (A protective resistor

is to be connected in series, and the inrush current through

PTC must be limited below maximum rated value.)

Withstanding Voltage

Without damage

After leaving for 24 hrs. or more in 25°C, it measures by 4 wire

measuring methods using the direct-current terminal current of

10mA or less (0.1 or less Vdcs).

Resistance Value (at 25°C)

The resistance value should be within the specified

tolerance.

Temperature range with maximum voltage applied to PTC.

Operating Temp.

-10 to 60°C

Step

Temp. (°C)

-20 +0, -3

Room temp.

+85 +3, -0

Room temp.

Time (min.)

10-15

Glass Epoxy PCB

F=5.0N

PTC

c PRG18/21BC Series

No.

Method of Examination

Rating Value

Item

R90E.pdf

Sep.24,2012

!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.

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