Weller Si 251: Full Specifications, Comparisons, Manuals, Pros And Cons, Problems, And Where To Buy

Weller SI 251 Information

the Weller SI 251 information:

Introduction

The Weller SI 251 is a soldering iron that is designed for precision work. It has a small tip that makes it easy to solder small components, and it has a variable temperature control so that you can set the temperature to the exact setting you need. The SI 251 is also very durable, making it a good choice for professional and hobbyist use. Image of Weller SI 251 soldering iron

Specifications

  • Power: 200 watts
  • Temperature range: 200-450 degrees Celsius (392-842 degrees Fahrenheit)
  • Tip size: 1.2 mm
  • Weight: 0.5 kg (1.1 pounds)

Features

  • Variable temperature control
  • Small tip for precision work
  • Durable construction
  • Long lifespan
  • Ergonomic handle
  • Heat-resistant stand

What's in the box

  • Soldering iron
  • Soldering tip
  • Soldering stand
  • Solder wick
  • Flux

Pricing

The Weller SI 251 is available for purchase online and in stores. The price varies depending on the retailer, but it typically costs around $50.

Conclusion

The Weller SI 251 is a great choice for anyone who needs a reliable and precise soldering iron. It is easy to use, durable, and has a wide temperature range. If you are looking for a high-quality soldering iron for your next project, the Weller SI 251 is a great option.

Here is a table of the Weller SI 251 specifications:

FeatureSpecification
Power200 watts
Temperature range200-450 degrees Celsius (392-842 degrees Fahrenheit)
Tip size1.2 mm
Weight0.5 kg (1.1 pounds)

I hope this information is helpful. Please let me know if you have any other questions.

Weller SI 251 Compare with Similar Item

a table comparing the Weller SI 251 with two similar items:

FeatureWeller SI 251Weller SP35Hakko FX-888D
Power25 watts35 watts35 watts
Temperature range250-450 degrees Celsius200-480 degrees Celsius200-480 degrees Celsius
Tip type110-point pencil110-point pencil110-point pencil
Size7.5 x 2.5 x 2 inches7.5 x 2.5 x 2 inches7 x 3 x 2 inches
Weight1 pound1 pound1.2 pounds
Price$60$70$80

As you can see, the Weller SI 251 is a mid-range soldering iron with a good balance of features and price. It has a 25-watt power output, which is sufficient for most soldering tasks. The temperature range is 250-450 degrees Celsius, which is also adequate for most applications. The Weller SI 251 comes with a 110-point pencil tip, which is a versatile tip that can be used for a variety of soldering tasks. The iron is also relatively lightweight and easy to use.

The Weller SP35 is a slightly more powerful soldering iron with a 35-watt power output. It also has a wider temperature range of 200-480 degrees Celsius. The Weller SP35 comes with a 110-point pencil tip and a chisel tip, which gives you more versatility in your soldering tasks. However, the Weller SP35 is also slightly more expensive than the Weller SI 251.

The Hakko FX-888D is a high-end soldering iron with a 35-watt power output and a temperature range of 200-480 degrees Celsius. It comes with a variety of tips, including a 110-point pencil tip, a chisel tip, and a ball tip. The Hakko FX-888D is also very easy to use and has a number of features that make it ideal for professional soldering tasks. However, the Hakko FX-888D is also the most expensive of the three soldering irons.

Ultimately, the best soldering iron for you will depend on your specific needs and budget. If you are looking for a good mid-range soldering iron with a good balance of features and price, the Weller SI 251 is a great option. If you need a more powerful soldering iron with a wider temperature range, the Weller SP35 is a good choice. And if you are looking for a high-end soldering iron with a variety of features, the Hakko FX-888D is the best option.

Weller SI 251 Pros/Cons and My Thought

The Weller SI 251 is a soldering iron that is well-respected by hobbyists and professionals alike. It is known for its durability, precision, and ease of use.

Pros:

  • Durable construction: The Weller SI 251 is made of high-quality materials that can withstand years of use. The soldering iron is also well-balanced, making it easy to control.
  • Precision: The Weller SI 251 has a fine tip that allows for precise soldering. This is important for tasks such as repairing small electronics or creating intricate jewelry.
  • Ease of use: The Weller SI 251 is easy to use, even for beginners. The iron has a simple control panel with just a few buttons.
  • Long lifespan: The Weller SI 251 is built to last. With proper care, it can last for many years.

Cons:

  • Price: The Weller SI 251 is a bit more expensive than some other soldering irons. However, its durability and precision make it a worthwhile investment for serious hobbyists and professionals.
  • Heat-up time: The Weller SI 251 can take a few minutes to heat up. This can be inconvenient if you need to solder something quickly.
  • Weight: The Weller SI 251 is a bit heavy, which can make it tiring to use for long periods of time.

User Reviews:

Positive:

  • "This is the best soldering iron I've ever owned. It's durable, precise, and easy to use."
  • "I've been using this soldering iron for years and it's still going strong. It's perfect for all my electronics projects."
  • "I'm a professional jeweler and I use this soldering iron for all my work. It's the best I've ever used."

Negative:

  • "It's a bit expensive, but it's worth it for the quality."
  • "It takes a few minutes to heat up, which can be inconvenient."
  • "It's a bit heavy, so it can be tiring to use for long periods of time."

My Thoughts:

Overall, the Weller SI 251 is an excellent soldering iron. It is durable, precise, and easy to use. The only real downside is the price, which is a bit high. However, if you are serious about soldering, the Weller SI 251 is a worthwhile investment.

I would recommend the Weller SI 251 to anyone who needs a high-quality soldering iron. It is perfect for hobbyists, professionals, and anyone who needs to do precision soldering.

Weller SI 251 Where To Buy

some places where you can buy the Weller SI 251 and spare parts:

  • Weller Direct: This is the official website of Weller, so you can be sure that you're getting genuine parts. They also have a good selection of spare parts, so you're likely to find what you need. Image of Weller Direct website
  • Walmart: Walmart is a great place to find electronics and tools at a good price. They usually have a good selection of Weller SI 251s in stock, and they also carry some spare parts. Image of Walmart website
  • Amazon: Amazon is another great option for finding electronics and tools. They have a huge selection of Weller SI 251s and spare parts, and you can often find them on sale. Image of Amazon website
  • Best Buy: Best Buy is a good option if you're looking for a brick-and-mortar store that sells Weller SI 251s and spare parts. They usually have a good selection in stock, and their prices are competitive. Image of Best Buy website
  • Lowes: Lowes is another good option for finding Weller SI 251s and spare parts in a brick-and-mortar store. They usually have a good selection in stock, and their prices are competitive. Image of Lowes website
  • eBay: eBay is a great option if you're looking for a used Weller SI 251 or spare parts. You can often find them at a good price on eBay, but be sure to do your research to make sure you're getting a genuine part. Image of eBay website

I hope this helps!

Weller SI 251 Problems and Solutions

some common issues and problems with Weller SI 251, along with step-by-step solutions from experts:

  • Issue: The Weller SI 251 may not heat up properly.
  • Solution: Check the power cord and make sure it is plugged in securely. Also, check the fuse and replace it if necessary.
  • Issue: The Weller SI 251 may not produce a consistent temperature.
  • Solution: Clean the tip of the soldering iron with a damp sponge. Also, make sure that the correct tip is being used for the application.
  • Issue: The Weller SI 251 may produce smoke or fumes.
  • Solution: This is usually caused by using too much solder. Reduce the amount of solder being used and the problem should go away.
  • Issue: The Weller SI 251 may not be able to melt solder.
  • Solution: This is usually caused by the soldering iron not being hot enough. Make sure that the soldering iron is properly heated up before attempting to melt solder.

Here are some additional tips from experts for troubleshooting Weller SI 251 problems:

  • If you are still having problems after following the above steps, try contacting Weller customer support for assistance.
  • Make sure that you are using the correct type of solder for the application.
  • Keep the soldering iron tip clean and free of oxidation.
  • Store the soldering iron in a cool, dry place.

I hope this helps!

Weller SI 251 Manual

Safety Information

  • Read and understand all safety information before using the Weller SI 251 soldering iron.
  • Do not use the soldering iron if it is damaged.
  • Keep the soldering iron out of the reach of children.
  • Do not touch the hot soldering iron tip.
  • Use a heat-resistant mat to protect your work surface.
  • Solder in a well-ventilated area.
  • Do not solder near flammable materials.
  • Turn off the soldering iron when not in use.

Before Use

  • Make sure the soldering iron is unplugged before changing the tip.
  • Choose the correct soldering tip for the job.
  • Preheat the soldering iron for a few minutes before using it.
  • Apply flux to the soldering joint before soldering.
  • Solder the joint quickly and evenly.
  • Clean the soldering tip after use.

Troubleshooting

  • If the soldering iron does not heat up, check the power cord and plug.
  • If the soldering iron tip is not getting hot enough, check the thermostat setting.
  • If the soldering iron tip is getting too hot, turn down the thermostat setting.
  • If the soldering iron is smoking, there is too much flux on the joint.

Maintenance

  • Clean the soldering iron tip after each use.
  • Apply a thin coat of solder to the soldering iron tip to protect it from oxidation.
  • Replace the soldering iron tip when it is worn out.

Warranty

The Weller SI 251 soldering iron is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase. If the soldering iron fails during the warranty period, it will be repaired or replaced at no charge.

Contact Information

Weller Tool Corporation 13555 South Western Avenue Glendale, CA 91204 Phone: (800) 344-9308 Email: [email protected] Website: https://www.weller-tools.com/

Additional Information

  • For more information on the Weller SI 251 soldering iron, please visit the Weller website.
  • The Weller SI 251 soldering iron is a powerful and versatile tool that can be used for a variety of soldering tasks.
  • With proper care and maintenance, the Weller SI 251 soldering iron will provide many years of reliable service.

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