Weller SP40NKUS Soldering Iron Review

Weller SP40NKUS Soldering Iron
Weller sp40nkus Soldering Iron

Product Name: Weller SP40NKUS

Product Description: Weller SP40NKUS is an amazing soldering iron that you can add to your soldering kit. Many professional or semi-professional solderers prefer buying high-quality soldering iron instead of a cheap soldering station.




  • Lightweight
  • Triangular shape
  • Two sizes, 25W and 40W
  • Great for beginners


  • Low power
  • Tips could be better
  • The cord is not too long
  • Power - 86%
  • Quality - 93%
  • Quick Heating - 93%
  • Customer Reviews - 91%
  • Works Properly - 97%

About Weller SP40NKUS

Weller sp40nkus


Soldering iron SP40NKUS is one of the best-selling soldering iron on the market. Good and affordable price for soldering iron will simply force you to buy. It is good Weller quality soldering iron with great durability. Package of 40W contains Iron with MT10, 6mm tip, iron stand, user manual, soldering aid tool, lead-free solder, spare ST3 (3.2mm), and ST7 (0.8mm) tips.

SP40NKUS package contains Iron with MT10, 6mm tip, iron stand, user manual, soldering aid tool, lead-free solder, spare ST3 (3.2mm), and ST7 (0.8mm) tips. It means that iron is available in two different power, 25W and 40W, so you can select which one is for you. Soldering iron is a particular product for some basic soldering. They are often used in harder soldering or some thick wire, and they are transitioning between soldering stations with digital temperature controlling and soldering guns. Sp40NKUS is a soldering iron that is used by everyone, including hobbyists, DIY-ers, and professionals.

Weller SP40NKUS Specifications

SP40NKUS is high-performance soldering LED iron. Version with 40W power goes up to 900ºF, and 25W version maximum temperature is 750ºF. Three 5mm high-temperature long-life LEDs at 25 Lumens/ft² for superior soldering accuracy. Co-molded soft grip ribbed handle design for maximum comfort and reduced slippage. It has a triangular design which allows quickly controlling during soldering. The balance of weight is impressive, and you can solder without effort. It features a stainless steel heater construction, easy tip changes, and a durable cord with a 5-foot reach. A 7-year limited warranty backs this soldering iron.

Customer reviews

Weller SP40NKUS has an attractive rating on Amazon, and it has over 435 customer reviews, and it approves that this is one of best seller soldering iron. Reviews are positive, and usually, they give a 5 rating. They are saying iron heating is quick; it can repair stuff, good for housekeeping and garage. I select a few reviews for you.

  • I am a beginner, and this tool can do whatever I want. I am satisfied so far.
  • Weller SP40NKUS is a soldering iron that can maintain various types of jobs.
  • Great soldering iron for professionals and beginners. I like this handle; it is amazing.
  • You should try this iron if you have any confusion.

Weller sp40nkus


Weller SP40NKUS soldering iron is a good choice for DIY-ers and hobbyists. If you are new to soldering, maybe you want to buy some cheaper soldering iron, and if you think you will not use it too much. You can buy some no-brand soldering iron for 6-8 $, but often you cannot use them after a few months. With SP40NKUS, you get seven years warranty, and you do not need to worry about quality. It can do many soldering jobs, and it is a low price, so do not wait to take one now.

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