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Weller SP40NKUS 40-Watts Soldering Iron Kit Red/Black, 5 piece

4.6 4.6 out of 5 stars 1,391 ratings

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Standard Kit

Purchase options and add-ons

Brand Weller
Power Source Corded Electric
Wattage 40 watts
Included Components 1 Weller Branded Product
Style Standard Kit

About this item

  • Medium duty consumer soldering iron with the latest LED technology. Includes 2 spare tips, wire, and solder aid tool
  • 3 LEDs for superior accuracy and application illumination
  • Triangular handle for tip positioning and precise control
  • Co-molded and ribbed grip for maximum comfort and reduced slippage
  • Easy tip change with a variety of options
See more product details

Customer ratings by feature

Easy to use
4.8 4.8
Value for money
4.5 4.5
Temperature Control
3.6 3.6

Frequently bought together

$34.35
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Weller SP40NKUS 40-Watts Soldering Iron Kit Red/Black, 5 piece
Weller SP40NKUS 40-Watts Soldering Iron Kit Red/Black, 5 piece
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Price$34.35-12% $29.99
List:$33.99
$24.36-20% $18.49
List:$22.99
$12.96$24.85
Delivery
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Get it as soon as Sunday, Mar 31
Customer Ratings
Value for money
4.5
3.5
3.5
3.1
4.3
3.5
Temperature Control
3.6
3.4
3.2
3.5
4.4
3.0
Easy to use
4.8
4.0
4.0
4.4
3.7
Sold By
EstBuy Trading
Amazon.com
Amazon.com
Amazon.com
MINGQ
Amazon.com
power source
Corded Electric
AC
AC
AC
ac
AC
heating element type
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
head style
spare tips
chisel,flat
Chisel
Chisel
solder tip
Chisel
style
Standard Kit
Pencil
Pencil
Pencil
80W blue
Pencil
model number
SP40NKUS
WLIRK6012A
WLIRK3012A
WLIR3012A
80w- blue
WLIR6012A
weight
6.9 ounces
0.37 pounds
0.35 pounds

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Product information

Technical Details

Additional Information

Warranty & Support

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Product Warranty: For warranty information about this product, please click here. [PDF ]

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Weller SP40NKUS 40-Watts Soldering Iron Kit Red/Black, 5 piece


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Product Description

Product Description

Weller's high performance consumer soldering iron with the latest LED technology. Delivers light to the application while working.

Amazon.com

High-performance LED soldering iron (view larger).

Delivering the ultimate soldering experience, the Weller SP40NKUS Soldering Iron Kit includes the SP40N co-molded hand soldering iron with three built-in LEDs for superior accuracy and application illumination. This medium duty iron produces 40 watts (up to 900 degrees F) for joining 12 AWG wire or smaller. It's ideal for use on electrical/electronic components, audio equip., RC hobbies, and more.

A round, soft grip, non-slip handle design helps relax the hand during extended use, and it easily provides a mechanism to roll and position the tip for application needs. A triangular front housing contains the high temperature long-life LEDs, which produce 25 lumens of light. Once the tip position is determined, the hand naturally gravitates to the triangular area to provide a more stable and effective way to control the tip position. It features a stainless steel heater construction, easily tip changes, and a durable cord with a 5-foot reach. This soldering iron is backed by a 7-year limited warranty.

What's in the Box

SP40NKUS iron, MT10, 6mm tip, iron stand, soldering aid tool, lead-free solder, spare ST3 (3.2mm) and ST7 (0.8mm) tips, operating instructions

About Weller

Weller has been the leading brand in professional-quality soldering equipment since 1945. In addition to its famous irons and soldering guns, Weller is also recognized as a leader in advanced electronic rework and repair equipment and irons for sophisticated industrial applications as well as numerou products for DIYers and hobbyists.

SP40NKUS Medium Duty LED Soldering Iron Kit

At a Glance
  • Produces 40 watts (up to 900 degrees F)
  • Three LEDs for superior accuracy and application illumination
  • Easy tip change with a variety of options
  • Triangular handle for tip positioning and precise control
  • Co-molded and ribbed grip for maximum comfort and reduced slippage
  • 7-year limited warranty

WARNING:

CHOKING HAZARD -- Small parts. Not for children under 3 yrs.

Important information

Legal Disclaimer

This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Wattage

40 watts

Bulb Voltage

120 volts

Customer reviews

4.6 out of 5 stars
4.6 out of 5
1,391 global ratings

Customers say

Customers like the quality, performance, brightness, and value of the soldering iron. For example, they mention it's well made, works well for small solder jobs, and has handy lights. Some appreciate the accessories, ease of use, and ease of holding. That said, opinions are mixed on the heat.

AI-generated from the text of customer reviews

205 customers mention156 positive49 negative

Customers like the quality of the soldering iron. They mention that the tips are good quality, and the product is well made. Some say that it is an amazing solder iron, and an effective kit to do solder projects.

"...It worked very good. I did six PL-259's total. The chisel tip is still nice and shiny." Read more

"...Excellent iron but I have no idea how to use the black stick tool that came with it. I have been using it for through hole components." Read more

"...Worth the few extra dollars. Heavy duty tips made well...." Read more

"...and makes iron not truly stable.(Has fallen several times now and burned a few things)..." Read more

146 customers mention129 positive17 negative

Customers like the performance of the soldering iron. They say it heats up fast, works well for small solder jobs, and intuitive. The solder that came with it worked perfect. The iron works great for re-wiring a guitar and has 3 tips. The precision tip works well and has a great shape. The LED lighting is really neat and works well to see where you are solder.

"It heats up fast and works very well. The led lights don't really add much light." Read more

"...It worked very good. I did six PL-259's total. The chisel tip is still nice and shiny." Read more

"I bought this to use on my jewelry and so far it works great. I use some silver solder to attach wires to pieces and attach pieces to each other...." Read more

"...Haven't had to. From day one this iron worked great. The only complaint I have for this iron is that it feels like it gets too hot...." Read more

104 customers mention84 positive20 negative

Customers like the brightness of the soldering iron. They say the LED lights are perfect to light up the spot where they are working. They also say the lights in the handle are nice for giving off some extra light when working. Some customers say the best feature is the light, which they didn't think they would care for, but it does.

"Pros:- Affordable- LEDs to help see what you are soldering- Usual multiple set of different tips- Easy to set up..." Read more

"...The LEDs are very useful when soldering in not-ideal amounts of light...." Read more

"...The LED lighting in the handle is very nice for giving off some extra light when working on delicate components that are harder to see due to their..." Read more

"...The best feature is the light which I didn't think I would care for, but it does really help." Read more

86 customers mention70 positive16 negative

Customers like the value of the soldering iron. They say it's a good low cost iron that does what they need it to do. The price is right with quick delivery and the kit offers flexibility in tip application. Customers also mention that it'll make a great purchase.

"Pros:- Affordable- LEDs to help see what you are soldering- Usual multiple set of different tips- Easy to set up..." Read more

"...Worth the few extra dollars. Heavy duty tips made well...." Read more

"While this soldering iron is inexpensive, you get what you pay for. I've had this iron for about 7 months and only used it 3 times...." Read more

"...Overall, I'm happy with the soldering iron. It is decently priced in the 20 buck range and has a 7 year warranty." Read more

31 customers mention31 positive0 negative

Customers find the accessories included with the soldering iron to be useful and a nice added feature. They also appreciate the variety of tips, which allow them to work exactly as they need to.

"...It's easy to hold on to and the extra tips are a big plus...." Read more

"...Heats up fast. Great tips and handle. Bangs out electronic jobs lightning quick. The solder it comes with is junk...." Read more

"...The tips are decent, I've used them a few times each and haven't noticed much deterioration, but I don't think they are very high quality...." Read more

"...It comes with a couple tips which was nice as there will be times you need a wider or more narrow tip." Read more

29 customers mention27 positive2 negative

Customers find the soldering iron intuitive, easy to set up, and great for beginners. They say it's comfortable to hold and easy to control for delicate tasks. Customers also mention that it heats up and is ready to use within a minute.

"...Usual multiple set of different tips- Easy to set upCons:- Feels cheap-..." Read more

"...is that otherwise it is very well built - heats up and is ready to use within a minute and LED's help in focusing on the area...." Read more

"Easy to use. The toughest thing about it is getting it out of the packaging. Just choose the attachment and plug it in...." Read more

"...I found the tool really intuitive, and the solder that came with it worked perfect - I didn't need to go out and buy a whole bunch of stuff that I..." Read more

26 customers mention26 positive0 negative

Customers find the soldering iron easy to hold. They mention that it has a comfortable grip, good ergonomics, and a ribbed handle. Some appreciate the molded rubberized grip.

"...It's easy to hold on to and the extra tips are a big plus...." Read more

"...The rubberized handle gives a great grip and I've had no issues with the handle getting too hot even after using it for an extended period of time...." Read more

"...Iron heats up fast. A lot faster than the one it replaced.Good ergonomic grip.LED Lights but also a con.Cons:..." Read more

"...Still the feel is good and the led's around the handle end light up your work area very nice...." Read more

156 customers mention85 positive71 negative

Customers are mixed about the heat of the soldering iron. Some mention that it gets hot fairly quickly, and the LED lights help a lot more than they would have. It doesn't add too much heat to melt the plastic rail ties, and it holds the tip securely. However, other customers say that it may get a bit too hot for sensitive solder projects, and there is zero temperature control.

"It heats up fast and works very well. The led lights don't really add much light." Read more

"...Easy to set upCons:- Feels cheap- No temperature control (when it's on, it's on)-..." Read more

"...These get HOT, and they do so very quickly. I have many rolls of solder and I needed enough heat to deal with anything I happen to pick up...." Read more

"...The only complaint I have for this iron is that it feels like it gets too hot. I started unplugging it in between component placing...." Read more

Weller soldering iron 40 watts
5 Stars
Weller soldering iron 40 watts
Excellent heat quality used it to solder 14awg wire onto a 12v car adapter. Heated up to full temp in 90 seconds, maintained temperature when soldering. Worth the few extra dollars. Heavy duty tips made well. I have used the 5.00 cheap soldering irons and they do not produce enough heat to melt solder unless you give them 4 min to heat up and the heat dissipates rapidly if soldering anything larger then micro connections. This is a true 40-watt iron like they used to be made 20 years ago. Stay away from the cheap kits for 5.99 or similar.
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Reviewed in the United States on September 29, 2023
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Reviewed in the United States on May 31, 2019
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5.0 out of 5 stars Weller soldering iron 40 watts
Reviewed in the United States on May 31, 2019
Excellent heat quality used it to solder 14awg wire onto a 12v car adapter. Heated up to full temp in 90 seconds, maintained temperature when soldering. Worth the few extra dollars. Heavy duty tips made well. I have used the 5.00 cheap soldering irons and they do not produce enough heat to melt solder unless you give them 4 min to heat up and the heat dissipates rapidly if soldering anything larger then micro connections. This is a true 40-watt iron like they used to be made 20 years ago. Stay away from the cheap kits for 5.99 or similar.
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6 people found this helpful
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Reviewed in the United States on December 17, 2014
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25 people found this helpful
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Top reviews from other countries

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MRS
5.0 out of 5 stars Works well
Reviewed in Canada on January 31, 2023
Style: Standard KitVerified Purchase
hector garcia
5.0 out of 5 stars muy bueno
Reviewed in Mexico on June 6, 2021
Style: Standard KitVerified Purchase
Toledo Ivan
5.0 out of 5 stars Excelente producto
Reviewed in Mexico on September 2, 2020
Style: Standard KitVerified Purchase
J-rod
1.0 out of 5 stars crap
Reviewed in Canada on October 30, 2021
Style: Standard KitVerified Purchase
Amazon Customer
2.0 out of 5 stars Tip melted after 2 uses
Reviewed in Canada on October 25, 2021
Style: Standard KitVerified Purchase
One person found this helpful
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