Most contamination problems can be prevented by exercising care during the cleaning and soldering process. Care should be taken not to immerse or spray unsealed switches during flux removal. Contact E-Switch for specific soldering recommendations. Generalized soldering procedures are outlined below.
HAND SOLDERING AND TEMPERATURES
Recommend soldering irons of 30 watt maximum with a tip temperature of 345°C (650°F) for 2-3 seconds and solder of 0.030 – 0.040 diameter.
SMT REFLOW (LEAD AND LEAD-FREE)
Classification Reflow Profile
WAVE SOLDER TIME AND TEMPERATURES
When wave soldering, we recommend using a no-clean flux soldering process, rather than a process that requires washing. The fluxing process must be controlled so as not to have flux migrate inside the switch.
WAVE SOLDER
(Includes Pb-free, max component side preheat temp of 130°C)
Good venting is required. No-clean flux vapors can enter the switch if adequate venting is not available. The vapors will condense on the internal contacts and become an insulator when they solidify.
- Preheat temperature/time: Circumferential temperature of the PC board not to exceed 100°C (212°F) for 60 seconds.
- Soldering temperature/time: not to exceed 260°C (500°F) for five seconds.