When you place the tip on your component or solder site, the temperature
falls asymptotically from your 380 C or 425 C to the desired soldering
temperature, that can be 220 C or 240 C. However, there are risks with
using as high temperature. If the component has a poor contact with the
solder site, the component (or part of it) may rush to 425 C in a few
seconds, and not all components like that. There may be a thermal
damage. If it's possible, use a lower temperature, and a tip with a
large mass, i.e. the temperature will not fall below 220 C or 240 C.
my 2 tips
Inge
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Luan Nguyen
Sent: den 26 juni 2008 10:48
To: [log in to unmask]
Subject: [TN] Temperature of lead-free for hand soldering
Dear All,
We have a question about set temperature for hand soldering. We were
using Hakko FM-202.
- For tin lead, we set 320 C degree
- For lead-free, we plan to set 380 C degree. However, we can not find
any standard (IPC, J-STD) mention to set temperature. We refer some
documents, experience sharing that temperature range is from 370 C
degree to 425 C degree. Moreover, in there is also mention as "> 80 W
hand soldering is always OK" that effect us due to Hakko FM-202 have
power consumption of soldering iron is 70W.
Please help me any reference, any document, any advice.
Thanks and best regards,
***************************
Nguyen Hoang Luan
QC&Training Supervisor
Spartronics VietNam Co, Ltd.
No.3, Street No.6, VSIP
Th An Dist., BDuong Prov., VN
Tel: (84-650) 784 890
Fax: (84-650) 784 891
Mobile: 090.3.667448
Email: [log in to unmask]
***************************
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