Best Solder for Electronics – Best Soldering Wire – Best Lead Free Solde

What is the best solder for electronics? Whenever you are building something out of metal, you will always use a solder to join at least two metal pieces. Of course, there are other methods of joining metal pieces. These can include brazing and welding. However, if you are working with electronics that have very sensitive circuitry, you will only want to use the soldering technique.

It goes without saying that soldering requires certain tools that can guarantee the best possible bond between metal pieces without exposing you to significant harm. Choosing the right solder can help you build or fix your electronic devices, while ensuring your safety in the process.

Top 10 Best Solder for Electronics

WYCTN 60/40 Solder Wire for Electrical

WYCTN 60/40 Solder Wire for Electrical

If you are only starting out in your soldering journey, we recommend the WYCTN 60/40 Solder Wire. This solder is inexpensive enough to make it a good choice for budget-conscious people.

The solder also flows very nicely and it sticks where you need it to. Its melting point is low enough not to damage your electronics. The wire has a very small diameter that is perfect for soldering tiny circuits and electronic components.

We did unearth some issues about the poor quality of joints that it makes. What comforted us a bit is the fact that there are more people who found success with this product than those who had a very bad experience with it.

This solder from WYCTN may not have an American badge. However, its price and reliable performance in soldering electronics make it a wise choice for people who are new to the world of soldering.

Alpha Fry AT-31604 Rosin Core Solder 60/40

Alpha Fry AT-31604 Rosin Core Solder 60/40

The Alpha Fry AT-31604 Rosin Core Solder is a Mexican product that is now gaining popularity among American DIYers and electronics aficionados. It has good melting point and very small diameter that will bond together very small electronic components.

We found the Alpha Fry to be great for fixing common household appliances such as the stereo, TV, radio, and VCR. It works well on small motors and delicate wires, too. While it contains lead, the fumes that the AT-31604 creates are almost negligible enough to have a dramatic impact on your health. Of course, protection is still a must when working with the Alpha Fry.

What bothered us about the Alpha Fry is that it does not come with a return policy. This hardly matters as the solder works as intended.

The Alpha Fry AT-31604 is a wonderful product for soldering electronics. It is very easy to work with and comes with a price that is friendlier than most.

Alpha Metals #AM31605 Tin Lead Soldering

Alpha Metals #AM31605 Tin Lead Soldering

When working with electronics, you would want the best possible connections for your circuit. One way you can ensure this is by using the #AM31605 Tin Lead Solder from Alpha Metals.

This solder flows effortlessly onto the materials that you want to bond. Its temperature is not high enough to risk damaging your electronics. It already comes with rosin to help ensure a better finish in your joints. Working with this solder is very easy. Even an absolute beginner will not have issues with the solder.

The diameter of the #AM31605 may not be ideal for very small or tightly-packed electronic circuitry. You will need a smaller gauge or diameter for such a purpose. Other than that, this solder should be perfect for many applications.

The Alpha Metals #AM31605 Tin Lead Soldering is a product that people can rely on to make strong electrical connections. It has good solder properties and a nice price to match.

Kester 63/37 Solder Melting Point

Kester 63/37 Solder Melting Point

The Kester 63/37 Solder Melting Point is a wise choice for people who want to minimize their exposure to lead, while still benefitting from the advantages of using a conventional lead-based solder.

This solder has a higher melting point than your average 60/40 composition. It is great for working with electronics that have better heat tolerances. We love the instant wetting action of the Kester’s rosin core. It does not corrode, even if you forget to clean the surface right after soldering.

One downside to the Kester is that it costs you more than twice other products. With the quality of its soldering characteristics, cost is never an issue.

We like to believe that the Kester 63/37 solder is the perfect choice for people who want a product that is very easy to work with. Its lower lead composition also makes this Kester product a wise choice for health-conscious people.

Kester Solder Wire 32117

Kester Solder Wire 32117

People who have been soldering for most of their lives trust only Kester when it comes to solder. One of the brand’s bestsellers is the Solder Wire 32117. This comes with a standard 60/40 tin-lead composition for a lower melting point and better appearance of the joint.

The 32117 has all the fine characteristics of a conventional lead-based solder. Using it is easy. It melts nicely and flows into your intended area with precision. The appearance of the soldered joint also looks more refined than other solder.

As expected, the Kester 32117 can be very expensive. However, given its performance and the amount of solder wire you get per spool, this is a solder that will last many years. It can translate to more electronic devices you can fix without spending extra for additional wires.

The Kester Solder Wire 32117 is one of the best solders you can ever use for electronics. It bonds metal pieces exceptionally well.

Cardas Solder Wire Quad Eutectic Silver Solder

Cardas Solder Wire Quad Eutectic Silver Solder

If you want stronger and more conductive solder joints, you will want a solder that includes silver in its composition. One of the most reliable solutions on the market that have such properties is this solder wire from Cardas.

The company calls it a ‘quad’ solder because of the mixture of four different elements in the solder composition. It adds silver and copper to the base composition of lead and tin. The result is a solder joint that is stronger than other solder types. It is also perfect for ensuring better electrical conductivity.

Because of the unique composition of the Cardas, you can expect its price to be higher than most.

We think the price does not matter that much as the Cardas solder wire is long and has good soldering characteristics. This product is good for soldering thousands of electrical components, while ensuring better safety than traditional 60/40 lead solder.

MAIYUM 63-37 Tin Lead Soldering

MAIYUM 63-37 Tin Lead Soldering

There are some of us who do not want to invest in a premium-quality solder. This is especially true for those who are new to soldering. If you are such a person, then the MAIYUM 63-37 Tin Lead Soldering is a good choice.

One thing we noted about the MAIYUM solder is that it melts and flows well with low heat. This is perfect for working with electronic toys and gadgets, as well as home appliances. It already has a rosin core that ensures better oxidation control. The finish of the solder joint looks more flawless than those created by more expensive products.

Keep in mind, however, that the MAIYUM may not be suitable for very small electronics or those with tightly-spaced components. The size of the solder joint created can be an issue with these devices.

Nevertheless, the MAIYUM Tin Lead Soldering is a good product for average use. It is inexpensive, too.

Mudder Lead Free Solder for Butane Soldering Iron

Mudder Lead Free Solder for Butane Soldering Iro

The Mudder Lead Free Solder is a wise choice for people who do not want to get themselves exposed to lead during soldering. This product contains only tin, silver, and copper.

We tried using the Mudder solder in fixing a circuit board and it performed well in bonding capacitors to the board. While it does have a higher melting temperature, the unique characteristics of the solder’s chemical composition allowed us to retain the integrity of our circuit board. If this works well with circuit boards, then it should not have any problems with other electronics.

The downside of the Mudder solder is that is not ideal for electronics that are very sensitive to high heat. You will also have to use a soldering iron that can melt the solder at a higher temperature.

Despite this limitation, the Mudder Solder is still a great product. This is especially true if you do not want to expose yourself to lead.

Lead Solder Wire 63-37 for Cordless Soldering Iron

Lead Solder Wire 63-37 for Cordless Soldering Iron

You do not need an expensive solder if you are only going to use it occasionally on some small project. What you need is a solder that can give you a strong bond, good conductivity, and a nice finish to the joint. This is where the Acusstom Lead Solder Wire can be very advantageous.

We were surprised to learn that the price of the Acusstom was for three packs of 63/37 lead-based solder. This makes the product a good option for those on a tight budget or those who only want to ensure the basic connections in their electronics. The Acusstom flows much like expensive brands. It secures electronic components well, too.

Our only lament is that the size of the wire may be too big for very small electronic devices.

Other than that, we do not have any complaints about the Acusstom Lead Solder Wire. It does a decent job of soldering for its price.

Kester Rosin Core Solder 63/37 for Soldering Iron Station

Kester Rosin Core Solder 63/37 for Soldering Iron Station

One can never doubt the quality of Kester products. It is a trustworthy brand when it comes to soldering materials. One of the brand’s most sought-after solder is the Rosin Core Solder 63/37 for the soldering iron station.

The design of the solder wire incorporates more rosin than other brands. We find this very interesting as it already minimizes the application of additional flux. The composition of the solder also allows for better flow with minimal heat application. We used this Kester product on several electronic devices and it performed exceptionally.

We do not have any issues with the solder itself. However, we do find that the wire often gets entangled on the spool. We had to rewind the wire around the spool to address this issue.

Regardless, the Kester Rosin Core Solder works better than expected. The solder joints are stronger and have a more polished appearance to them.

Types of Soldering

Soft soldering, hard soldering, and brazing are the three major types of soldering. They differ in the melting points of the filler and the type of metal pieces being joined. However, most people today look at the solder type depending on whether the filler contains lead or not. In this section, you will learn lead free solder vs lead solder as the two basic types of soldering substances.

Types of Soldering

Lead Based Solder

This was the go-to filler among electronics manufacturers and repairmen for many decades. It is a combination of lead and tin. One of the most remarkable properties of this type of solder material is that it exposes the electronic component to less thermal threat. It is also cheaper than lead-free solder, while ensuring a shinier appearance once cooled. This makes it easy to spot oxidation and other problems in the joint. The only problem is that there has been an increasing pressure from health and environmental advocates regarding the use of lead.

Lead Free Solder

As the name implies, a lead-free solder does not contain lead. The question now is what is lead free solder made of? This solder material often includes a combination of tin, indium, zinc, silver, bismuth, copper, and antimony. Some manufacturers can also include other trace elements.

In learning about lead vs lead free solder, one must look at their main differences. One of these is the melting points of both materials. In general, the melting point of a lead-free solder is higher than a lead-based filler. Lead free solder temperature can reach as high as 217OC. Other lead-free fillers can have a higher melting point, depending on their chemical composition. For example, a combination of tin and copper can have a melting point of 227OC. On the other hand, a lead-based solder will only have a melting temperature of 183OC.

One flaw of a lead-free solder is its poor wettability. As such, if you want the best lead free solder, you will have to choose one with good wettable properties.

Newbies often have a difficult time choosing a solder that is right for their electronics. There are several factors that one must consider when shopping for the best solder for your electronic devices.

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Buyer’s Guide Best Solder for Electronics

Newbies often have a difficult time choosing a solder that is right for their electronics. There are several factors that one must consider when shopping for the best solder for your electronic devices.

Guide Best Solder for Electronics

Soldering Composition

There are lead solder products that have a 60/40 composition or a 63/37 composition. This reflects the amount of tin relative to the amount of lead in the solder. A tin-copper lead-free solder can have a composition of 97/3. Keep in mind that the greater the tin composition, the higher the melting point and the higher its resistance to corrosion.

Solder Diameter

The diameter of the solder depends on what you will be working on. If you are going to work on basic electronics, then a solder gauge of 16 to 22 is enough. If you will be working on electronics with very small spacing in between metal parts, you would want to use a solder with a higher gauge number as this will have a smaller diameter. Solder for electronics often has a diameter between 0.028 inches (Gauge 22) and 0.064 inches (Gauge 16).

Flux Solder

There are two reasons why you need a flux solder. One is to improve electrical connection between two critical parts of an electronic device. The other is to improve the strength of the bond. One of the most common type of flux is rosin. This helps prevents further oxidation at the point of contact between the solder and the metals. Unfortunately, there have been issues raised because of the fumes that rosin creates during soldering. It can expose certain people to asthma attacks. If you have asthma, then you should consider choosing a rosin-free flux.

Lead Free Solder vs Lead Solder

If you are only beginning to solder, the general recommendation is to use a lead-based solder. It is a lot easier to work with. Lead-free solder is very easy to oxidize. There are also those that can produce less structurally-sound metal bonds. The only issue with lead-based solder is its safety. However, if you are not going to expose yourself to large amounts of lead at a time and you will observe basic safety and lead-handling procedures, then a lead solder is for you.

Shelf Life

Solder companies always put expiration dates on their products. Lead-based solder often has a shelf life of about 2 years. Lead-free solder can last up to 3 years. However, the actual shelf life of solder depends on its chemical composition.

Benefits of Soldering Electronics

Benefits of Soldering ElectronicsElectronic devices have very sensitive and very small circuits that are vulnerable to breakage or damage. One of the most important benefits of soldering is strengthening the connection between two or more metal components of an electronic device. This guarantees a longer life span for your electronics.

Another benefit is the improved performance of the device. Soldering ensures better electrical connectivity, allowing you to enjoy the different features of your electronic gadget.

Choosing the right solder can also allow for the making of smaller electronic components. Many solder systems today can work on platforms that have very tight spacing between individual components. You can make electrical devices that are smaller than the average.

What Kind of Solder for Electronics?

Most people who solder electronics use lead-based solder of either a 60/40 or 63/37 composition because of its lower melting point and a better finish. For those who are concerned about their health, they can always choose a lead-free solder. It is also important to stick with solder that has either a water-based flux or a rosin flux. Using acid flux can damage the sensitive circuitry of electronics.

How to Use Flux When Soldering Electronics

How to Use Flux When Soldering ElectronicsYou will need a flux to strengthen the bond of metals and ensure better electrical conductivity. Start by cleaning the surfaces to be bonded, including the tip of the soldering iron. Intertwine your wires to be soldered so that there will be no pointed ends. Apply a layer of flux on the intertwined wire, making sure to coat the surface completely.

Apply a small amount of filler onto the iron tip just before you press the tip onto one side of the intertwined wire. Press your solder in the opposite side. The heat from the iron and the wires will also start melting the solder. Make sure to cover the surface of the wires with melted solder before you remove the soldering iron. You can press the solder for about one or two seconds and let the iron tip distribute the melted substance. you can always add more if necessary. Allow the solder to cool down, solidify, and harden.

How to Solder Safely

Soldering will always expose you to some form of harm. Here is how you can ensure your safety when soldering.

Avoid lead exposure

Using a lead-free solder is best. However, if you prefer using a lead-based solder, then you should minimize exposure to this substance. Always wear personal protective equipment like

appropriate clothing and a face shield or safety goggles. Wash your hands right after soldering. Keep your soldering station clean. Make sure that your soldering area is in a well-ventilated location.

Avoiding rosin exposure

Always wear a particle respirator when working with rosin flux solder. You can also use a face shield.

General safety rules

Whenever soldering, it is best to keep your work area as clean as possible. This will not only help ensure better bonding of the metals. It can also keep you safe. Always wear protective equipment. Make sure to adhere to the safety protocols of the manufacturer. It would help to read the product’s Safety Data Sheet for a deeper understanding of how you can keep yourself safe.

Proper waste solutions

Always dispose of lead solder and other materials in a lidded metal container. Make sure to label the container as hazardous. Contact your local waste management office so they can pick up the hazardous material.


Picking the best solder for electronics is a matter of personal preference as well as the extent of your soldering activities. Lead-based solder remains the go-to product for soldering electronics as it is a lot easier to work with. Lead-free solder products are excellent for those who do not want to expose themselves to unnecessary harm. Regardless of the type of solder that one uses, it is still crucial to learn how to use it properly. Both can offer good structural strength for your electronics, given the correct procedure of soldering. Of equal importance is the observation of safety protocols in the use and handling of these products.

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