Chengdu Ebyte Electronic Technology Co.,Ltd.
E280-2G4T12S User Manual
Copyright ©2012–2021
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
18
10 Welding operation guidance
10.1 Reflow temperature
Profile Feature
Curve characteristics
Sn-Pb Assembly
Pb-Free Assembly
Solder Paste
Solder
Sn63/Pb37
Sn96.5/Ag3/Cu0.5
Preheat Temperature min
（
Tsmin
）
Minimum
preheating
temperature
100℃
150℃
Preheat temperature max (Tsmax)
Maximum
preheating
temperature
150℃
200℃
Preheat Time (Tsmin to Tsmax)(ts)
Preheat time
60-120 sec
60-120 sec
Average ramp-up rate(Tsmax to Tp)
Average rise rate
3℃/second max
3℃/second max
Liquidous Temperature (TL)
Liquid phase temperature
183℃
217℃
Time
（
tL
）
Maintained Above
（
TL
）
Liquid phase or more
60-90 sec
30-90 sec
Peak temperature
（
Tp
）
Peak temperature
220-235℃
230-250℃
Aveage ramp-down rate
（
Tp to Tsmax
）
Average drop rate
6℃/second max
6℃/second max
Time 25℃ to peak temperature
25 ° C to peak temperature
6 minutes max
8 minutes max
10.2 Reflow solder curve diagram
