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Why do you need a variable temperature soldering iron?
The tip stays hotter than it needs to be (so it doesn’t cool down too quickly when you do apply solder), so the solder that is on the tip oxidizes quickly. This makes for poor thermal conductivity which makes soldering hard. All these reasons are why you need a temperature-controlled soldering iron.
How hot does a 30 watt soldering iron get?
30 watt. You can expect a 30 watt soldering iron to reach between 400°C-470°C. This may not seem like a massive step-up in terms of how hot the soldering iron can get, but a 30 watt is far better at maintaining its heat compared to a 20 watt. A 30 watt soldering iron should be suitable to do most electronic soldering.
How does a temperature controlled soldering iron work?
Working of Solder Iron Temperature Controller The TRIAC connected here in the circuit, switches the high current and voltages over both parts of an AC waveform. The TRIAC is fired in different angles to get different temperature levels from 0 degrees to maximum.
How is the temperature of a soldering iron related to the wattage?
The instant the tip touches metal and solder a lot of heat is transferred away and temperature drops. The wattage does not correlate directly with the temperature of the iron (unless it is an adjustable iron). It has more to do with the heating capacity.
What to look for when buying a soldering iron?
When you are shopping for a new soldering iron keep these recommendations in mind in order to get the most bang for your buck — remember: temperature, wattage, and soldering iron tip.
Which is better a temperature controlled iron or a simple iron?
A temperature controlled iron is usually much higher power than a ‘simple iron’, for example 80W or more. This allows it to maintain a working temperature while it is being used, and heat parts with larger thermal conduction or capacity. It won’t slow down an operator, and is a bit more flexible on what it can be used for than a ‘simple iron’.
What happens when you use an underpowered soldering iron?
As the other two answers state, large parts need a lot of energy to heat the part and melt solder. Soldering with an underpowered iron might damage plastic or glue around a part, and may produce a poor soldered joint.