What is the Right Soldering Iron Temperature

Soldering Iron Temperature

Many people may not think about the right soldering iron temperature. Have you ever used soldering iron with variable temperature setting?

Probably a yes! Then you might be wondering about the same thing.

I have been wondering, "What is the right soldering temperature in the various situation?" My response to this, you should have the solder joint hot enough to melt the solder. In most cases, the solders melt at approximately 180 to 190 degrees Celsius (360 to 370 Fahrenheit degree Celsius). Different solder types will require different temperature to melt.

However, you should be aware of the Restriction of Hazardous Substances Regulations that came to pass in 2006. ROHS regulation prohibits the use of lead solders. Most common lead alloys have got special features that the fusion occurs at approximately 1800C.

The fusion of the most common lead-free alloy occurs at 220°C, a difference of 40°C. This implies that the temperature should be increased to achieve a solder joint. The hotter the tip, the higher chances of burning your fingers. 

Additionally, holding the iron tip in one place may lead to damage and overheating of your component. Therefore, it is vital to determine a right soldering temperature for your components.

Selecting Right Soldering Iron Temperature Chart Step By Step Guide

Soldering temperature is affected by a few things. When dealing with a high effect soldering iron, then a large soldering tip would be sufficient since it efficiently transfers heat - you don’t need high temperature. 

Perhaps just 250oC would be ok.

However, when you are using low effect soldering iron having a small and tiny tip that badly transfer heat. In this case, you need high temperatures.

A soldering temperature of about 400 oC will be good.

When you have a huge solder joint, one needs a higher temperature compared when you have tiny and small solder joint.


Learning by Experience

Getting the right temperature for your iron is something you can figure out as you try.

In case you are having trouble in having your solder melt, this implies that you should turn the heat a little bit.

You should consider turning the temperature down when you are burning your component. Working with the temperature between 350 to 400 degrees Celsius for most soldering works.


Soldering iron temperature controller circuit

Importance of Accuracy

It is advisable always to check your soldering temperature not only to avoid overheating and soldering with low temperature but also to increase the tip life. These are some of the importance of using accurate.

Overheating: Many technicians have the notion that if the solder does not melt within a shorter, then they should increase the soldering temperature to compensate.

However, raising the temperature can cause localized overheating and lifted lands, board damage, oxidation increase, overheated solder, poor solder joints and erosion of the tip surface plating.

Lower than expected temperatures: might lead to longer working time as well as poor heat transfer, reduced productivity and poor quality solder connections.

So for better performance, precise temperature readings are necessary.

How to Maintain Correct Temperature

You should always keep your working temperatures low when you have started soldering to avoid flux burning as well as poor quality solder joints production and also making them fragile.

When you notice the solder does not melt fast enough, you will be inclined to increase the temperature which should be avoided at all cost.

Instead, to maintain correct temperature in such a scenario, you should choose a larger tip having greater surface contact. A small surface contact will imply that there is a slow heat transfer.

Therefore, you will be compelled to increase the temperature to unadvisable levels of 450°C. This level is dangerous for soldering works.

Final Verdict

In conclusion, temperature regulation during soldering tasks is very important. Having the correct soldering iron temperature control enables one to complete his or her soldering tasks on time and efficiently.

Most soldering tasks work within 180°C to 190°C. Using lead-free solders often require little bit of more experience when handling the soldering equipment. When the soldering time is increased, printed circuits as well as components might get damaged.

Therefore, this will reduce the tip life as well as increases.

Willie Ryan

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