5

Solder Reflow Temperature Profile

0

TIME (SECONDS)

200

100

50

150

100

200

250

300

0

30

SEC.

50 SEC.

30

SEC.

160°C

140°C

150°C

PEAK

TEMP.

245°C

PEAK

TEMP.

240°C

PEAK

TEMP.

230°C

SOLDERING

TIME

200°C

PREHEATING TIME

150°C, 90 + 30 SEC.

2.5°C ± 0.5°C/SEC.

3°C + 1°C/–0.5°C

TIGHT

TYPICAL

LOOSE

ROOM

TEMPERATURE

PREHEATING RATE 3°C + 1°C/–0.5°C/SEC.

REFLOW HEATING RATE 2.5°C ± 0.5°C/SEC.

Recommended Pb-free IR Profile

217 °C

RAMP-DOWN

6 °C/SEC. MAX.

RAMP-UP

3 °C/SEC. MAX.

150 - 200 °C

260 +0/-5 °C

t 25 °C to PEAK

60 to 150 SEC.

20-40 SEC.

TIME WITHIN 5 °C of ACTUAL

PEAK TEMPERATURE

tp

ts

PREHEAT

60 to 180 SEC.

tL

TL

Tsmax

Tsmin

25

Tp

TIME

NOTES:

THE TIME FROM 25 °C to PEAK TEMPERATURE = 8 MINUTES MAX.

Tsmax = 200 °C, Tsmin = 150 °C