Artikelnummer / part number :

82.551.140

Bezeichnung :

description :

1206 SMD VARISTOR

SMD size:

1206

RECOMMENDED SOLDER PAD LAYOUT

(Unit : mm)

1 - The solder paste shall be printed in a thickness of 150 to 200µm.

2 - The SIR test of the solder paste shall be done（Based on JIS-Z-3284）

3 - IR reflow Pb Free Process suggestin profile (Based on J-STD-020-C):

- Preheat

1.The temperature rising speed is suggested to be 2~3°C/s.

2.Appropriate preheat time will be from 60 to 120 seconds.

3.Temp. maintain at 175 +/-25°C 120 seconds.

- Heating

1.Careful about sudden rise in temperature as it may worsen

the solder ability.

2.Set the peak temperature in 235°C 10-20s or 260°C 3-10s.

- Cooling

1.Ramp down rate 6°C/s max.

※Perform adequate test in advance as the reflow temperature

profile will vary according to the conditions of the manufacturing

process, and the specification of the reflow furnace

4 - Wave Soldering Process

Ramp-up rate 3°C/s max.

Temp. maintain at 175 +/-25°C 180 seconds max.

Peak temperature 260°C 3-10s.

Ramp down rate 6°C/s max.

to thermal shock, a preheat is recommended in the soldering

process. and the peak temperature should be under controlled

rigidly in the solder process.

5 - Hand Soldering Process

Preheating 150°C

Temperature of soldering iron tip 380°C max. 3 to 5 sec

The Varistorrs shall be cooled gradually at room ambient temperature

6 - Ultrasonic cleaning

For preventing failures or damages. Frequency 29MHz max - radied Power 20W/l max - Period 5mn max

Rapid heating, partial heating or rapid cooling will easily cause defect of the component. So preheating and gradual cooling process is

suggested. IR soldering has the highest yields due to controlled heating rates and solder liquidus times. Make sure that the element is not

subjected to a thermal gradient steeper than 3 degrees per second. 2 degrees per second is the ideal gradient. During the soldering process,

pre- heating to within 175 degrees of the solders peak temperature is essential to minimize thermal shock.

Spezifikation für Freigabe / specification for release

Würth Elektronik eiSos GmbH & Co.KG - Radialex department

Würth Elektronik eiSos GmbH & Co.KG - Radialex department

Würth Elektronik eiSos GmbH & Co.KG - Radialex department

Würth Elektronik eiSos GmbH & Co.KG - Radialex department

D-74638 Waldenburg · Max-Eyth-Straße 1 - 3 · Germany · Telefon (+49) (0) 7942 - 945 - 0 · Telefax (+49) (0) 7942 - 945 - 400

http://www.we-online.com

Kunde / customer :

SISE

A

B

C

D

0402

0.4~0.6

1.0~1.8

0.6~0.7

0.6~1.2

0603

0.8~1.2

1.7~3.0

1.2~1.6

0.9~1.8

0805

1.0~1.5

2.1~3.8

1.5~2.1

1.1~2.3

1206

1.8~2.5

3.0~5.8

1.8~2.6

1.2~3.3

1210

1.8~2.5

3.2~6.1

2.8~3.8

1.3~3.5

1812

2.5~3.5

4.0~7.3

3.3~4.5

1.5~3.8

2220

3.5~4.6

5.0~8.5

5.2~6.2

1.5~3.9

D

B

C

A

Time (mn)

250

75

100

125

150

175

200

225

01:00:00

25

02:00:00

03:00:00

04:00:00

Peak Temp.

260°C

(3 to 10sec)

Peak Temp.

175°C

(60 to 120sec)

Peak Temp.

245°C

(10 to 20sec)

275

Time (mn)

250

75

100

125

150

175

200

225

01:00:00

25

02:00:00

03:00:00

04:00:00

Peak Temp.

260°C

(3 to 10sec)

Preheat.

175°C 150sec max.

275

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