Hot-Air Rework Station - 303D

This hot-air rework station is great for professionals and hobbyists in need of tight temperature tolerances and large air flows. This unit displays a digital readout of the actual air temperature with a flow rate of up to 23L per minute. This very powerful unit can be used for multiple applications including standard SMD reflow/repair/removal, thermal IC stress testing, thermoplastic welding, and shrink-wrapping.

Each 303D Hot-Air Rework Station has two knobs on the front of the case to control air flow as well as temperature. These knobs are labeled Low to High allowing you to adjust the 303D almost immediately. This rework station even has a detachable power cable so if you happen not to like in North American you can replace it to fit your own standard plug provided it still uses 110/120V.

Note: We are currently updating the photos of this product and should have new ones up within the week. We apologize for any inconvenience this may cause and thank you for your patience.

  • 303D Hot Air Rework Station
  • Wand Holder
  • x2 Round Nozzle Tips
  • Closed-loop temperature control
  • Heats up quickly
  • Anti-static design
  • Intelligent cooling system maintains airflow after the unit is powered off until the air temperature is below 100°C
  • Temperature adjustment range: 100 ~ 480°C
  • Handle length (including air line): 120cm
  • Noise: <40dB
  • 110VAC input
  • Removable power cable
  • Dimensions: 224 x 126 x 110mm

Hot-Air Rework Station - 303D Product Help and Resources

How to Use a Hot Air Rework Station

April 10, 2018

Hot-air stations or heat guns are very useful tools and are essential for any electronics workbench. When working with or building printed circuit boards, there is a lot of room for errors to be made. Have no fear though, there are ways to remedy this with a hot air rework station!

Low Airflow when "Air" Dial is Turned Up

If you are getting low airflow when the "Air" Dial is turned up, make sure that you have the nozzle securely attached. With the nozzle, you will get more air flowing through the hot air rework station's handle.

S-E and H-E Errors

"S-E" Error

“S-E” usually means Sensor Error. It’s a common error. Sometimes it goes away after messing with the dial and the temperature will display properly again. Other times it indicates that the heat sensor is failing. The rework station might be able to be revived by removing and re-attaching the heater. Another tech support rep thinks it’s oxide building up on the connections. This results in fooling the controller into thinking the heater has failed.

"H-E" Error

Units displaying the “H-E” usually means there is a heating error. It might be that there is something with the heating element failing or not connected properly. Try checking the connections to see if the heating element needs to be re-seated. Last resort is getting a replacement heating element. A last resort is getting a replacement heating element.

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

3 Soldering

Skill Level: Competent - You will encounter surface mount components and basic SMD soldering techniques are required.
See all skill levels

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
See all skill levels


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • I love it and ive been using mine for years but as i get more into 0402, 0201,bga the air pressure is just too high on low. Do you guys sell an attenuation kit to lower the air pressure more?

  • garrettscooter / about 4 years ago / 1

    Mine might be an older version. It started to make a loud noise when ever it was on, so I finally got sick of the noise and opened it up. Turns out the 2 zip ties holding the pump to some other plastic part had broken so they were rattling on each other. I put some new zip ties (had to use 3 in series to get the needed length) and now its quite again. Just though I would share in case someone else has this issues, its not to hard to fix.

  • BerenV / about 4 years ago / 1

    Does anyone know how to do more advanced stuff like changing from °C to °F and calibrating it? There's a little button on the back of the control board, but I haven't been able to figure out what it does.

    • santaimpersonator / about 4 years ago / 1

      Temperatures are only in °C.

      • BerenV / about 4 years ago / 1

        Well, I’m sure there’s some way they can change it at the factory. There’s a F and a C light on the display...

  • CleverAlias / about 6 years ago / 1

    Is there a good & affordable preheater that pairs well with this?

  • euanadie / about 6 years ago / 1

    Hi! Cable aside am wondering if the unit would work here in the UK - does the power supply support 240V/50Hz, do you know? Or just 110V like the Features tab suggests?

    • CF / about 6 years ago / 2

      I wish these had support for 120/240 volt operation, but the internal components are 110/120 volt only. Unfortunately 240 volts will kill these in seconds.

      You're probably better off finding one that works on 240V/50Hz natively, but if you really wanted to, these could be used with a 800 watt or larger 240v to 120v step down transformer.

  • Madbodger / about 6 years ago / 1

    "Adjust immediately after adjusting"?

  • Kansukee / about 6 years ago / 0

    Hey can I comment yet?

Customer Reviews

4.7 out of 5

Based on 26 ratings:

Currently viewing all customer reviews.

2 of 2 found this helpful:

Nice tool works well

Only problem is I had to replace the zip ties that hold the air tank to the pump they failed in the first 15mins. Caused horrible noise and vibration. Simple fix cost one star...

1 of 1 found this helpful:

Nice Rework Station but with MInor Issues

When I received the station it had a loud vibration noise. I contacted the tech department and was told I could open up the unit if I felt comfortable. Upon opening the unit I found the 2 zip ties that hold the air chamber to the air pump were both broken. I replaced the zip ties and added some foam padding around the air tank and the unit is now quiet and works great. Other than that minor problem, the rework station has done everything I have asked of it.

1 of 1 found this helpful:

Great value for the money

I have an older Pace MBT with the hot air 'Thermo-Jet' handpiece which is fine for small things but needed a more robust hot air rework station. In looking at the options there were a load of really cheap and really questionable choices and a few brand name high dollar choices.

The Sparkfun 303D in terms of price is 1/10 the cost of a Hakko or Pace reflow station and works just as well. It is relatively quite and the auto-cooldown feature is really nice. I also like that it has two easy to adjust knobs which make adjustments very quick and easy.

I have also found myself using it as a makeshift PCB preheater. I was using a small HG-300D for this but found that the SFG-303D can also be used and not only preheat a large area before rework you can also spot heat a heavy trace to assist with desoldering. It makes removing large connectors on wide ground traces much easier.

2 of 2 found this helpful:

very good - but I wish the airflow went lower

I like this thing quite a bit. Compared to other rework stations I have used, it seems to have much better temperature control. It heats up unbelievably fast, it is comfortable to use and easy to control. I was, however, a little disappointment to find that the airflow setting goes from pretty high to absurdly high. I immediately set the airflow to the lowest possible setting and have not seen any need to increase it since. The high airflow makes the tool slightly more difficult to use in situations where you have a lot of densely populated components, but with care it is still usable.

Great hot air station.

Works well. As someone else mentioned, I pulled mine apart and found that the zip ties holding the tank on were both broken. The workmanship inside is good as well.

A very nice, economical hot-air station

I bought this instead of a more expensive (e.g., Hakko) unit, and very glad I did. So far, I've only installed a few 8-pin SOIC devices, but the unit is simple to use, the temperature seems accurate and settles in just a few seconds. More elaborate circuits to come !

great soldering station

its great for soldering/desoldering smd components and occasionally THT. unknowingly held the wand over a page of notes and burnt it.

Great Hot-Air Station

I've only worked with a few of these machines so I cannot attest to what I may be missing, however it has done everything I've needed it to; and at a super price! Sparkfun just made a xytronic-killer!


this unit is just what I was looking for , heats up quick , quality built little unit. i am going to have fun with this , and it was a fraction of the price of some other units i seen on line

Value for money

I bought this to finish a double sided PCB. Typically I use the hotplate method. I might be inclined to use this on single sided boards too. Only used once so far.

I love my new hot air station

I have had trouble soldering surface mount devices with my soldering iron. Surface mount is currently the best way to get components. The first time I tried it, it worked great at soldering on a 8 pin SOIC device. I have soldered multiple devices sincie and it works great, even including shrinking heat shrink tubing.

Too hot?

Excellent control over air, I just need to work on the temperature control better. If you're not careful, you will melt through the solder mask of a PCB.

Very Good Hot-Air Station

This is the second unit for me. The first one ran flawlessly for nearly six years, but one of the thermocouple wires broke right where the cable enters the box, and I couldn't find a replacement cable. I may take the cable apart and replace/repair the broken wire, but for now the new one I am sure will last longer than the first, as I will be taking much better care of the cable than I did with the first unit.

Really good

Worked right out the box, was prefect for my application, real intuitive. I appreciated the sparkfun manual.

This is great--for less than the price of a populated board

I bought this over a lot of more expense models because I trust sparkfun I really like it--after a few weeks of intense fabrication it works nicely. Airflow is a a bit high as others have mentioned--I find that using the larger nozzles solves this but it would be nice to have a weaker blower in further models.

I am recommending this to the guys at the lab!

Great station!

Work as expected and heats up very fast. Minimum air flow could be lower but so far it didn't resulted in any component flying away.

Best hot air unit on the market. Great Price

Have bought several brands of hot air rework units and this one has been found to perform well in constant production usage. We bought three units for our repair techs.

Very solid rework station

I’ve had this for over a year now and have been very happy with it. I like that it has an internal diaphragm pump rather than the blower in the handle that a lot of cheaper stations have. It’s quieter and makes the handheld part lighter too.

I wish it could switch to Fahrenheit as well as Celsius, but as far as I can tell there’s no way to do that (despite having the indicator on the display, which is misleading). Also, the minimum air flow is “25%” and that can even be a bit too much (especially if you use the smallest nozzle). Even on the lowest setting it tends to blow components away... whoever designed it probably couldn’t get the PID tuned right for super low flow and set the minimum at 25% (understandably).

Improved from the 2017 model

This is the perfect tool for soldering large SMT parts, such as ATmega168 or power supply inductors (with a jar of solder paste). The handle is more comfortable than the previous model. The fan is also more powerful. I bought one in 2017, but that one was sold with a company. It's so handy that I bought another one.

Con: the manuals are not online. I'll never find small odd-sized manuals, so I had to scan the manuals and saved on my hard drive (with backup). Would be nice if the manuals were under the "documents" section of the web site.

Great Hot-Air Rework Station

For the moment I am using the Hot-Air Rework Station 303D to put kits together, one "Gikfun DIY SMD SMT Welding Practice Soldering Skill Training Board Ek7028"and 3 Evil Mad Scientist's kits. Setting the rework station to 350 degrees and using the larger of the 2 included nozzles and the lowest air speed setting made assembling these kits amazingly easy, even the tiny 0402 sized components. I love that it is from Sparkfun and that replacement heating elements are available if I ever need them.

Very easy to use

First time using a hot air rework station. After practicing on a throw-away board, it was pretty easy to do the real work I wanted to do without messing things up. Just make sure you have flux, soldering paste, and isopropyl alcohol for clean-up. The whole assembly ended up being larger than I expected. I expected it to be about the size of my soldering station, but it's about the size of a toaster.

Quiet and super easy transition into rework

Bought this to repair a FujiNet, where the surface-mount USB micro port can pop off the PCB if you move the device while USB is plugged in. This repaired the device successfully.

This also seems OK for freshly soldering SMD - that point in time where you do not have an oven but you want to solder things that were too difficult with a soldering iron. Just remember an air tool can blow things around.

I have also used this to smooth out PLA objects from my 3D printer. Done with care, the objects look improved. See people's YouTube videos.

Noise levels are quite tolerable. NICE. You will hear some humming and clicking from the power supply. ((I am happy there is no piezo to "chirp" whenever the device temperature reaches the preset.. my Aoyue iron does this and it's the same chirp fire alarms use)). So you could use this at night while someone sleeps in the next room, with the door closed anyways.

Great Tool For The Arsenal

I've wanted a reason to get one of these for a couple years and in my kind-of-new job I get to repair emergency alert devices. So I finally had justification for purchase. This is my first rework station so can't compare it to anything other brands. I can say, for desoldering antenna connectors from circuit boards, it works great! Controls are easy. Display is easy to read. Hose/wire length is ok although I could use another couple feet. I'm looking forward to trying surface mount soldering just for fun now.

Good hot air gun

This hot air gun works very well