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Recommended Soldering Guidelines
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 and specifications not found in this catalog. Generalized soldering procedures are outlined below.
HAND SOLDERING AND TEMPERATURES
SMT REFLOW (LEAD AND LEAD-FREE)
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.
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 p.c. board not to exceed 100°C (212°F) for 60 seconds.