Yato YT-82457 750W hot air soldering station gets video tests, temperature graphs, and a teardown to check whether a $35 budget unit can desolder motherboard parts.
The station uses a 50/60Hz mains transformer, BTA16-800B triac control via MOC3041S, an S3F94C4EZZ-DK94 MCU, and a 24C02SN EEPROM on PCB YCD-858D.
At 350°C with full blow, it removed an SO8 chip in 90 seconds; at 400°C it lifted a coil in just over a minute.
Performance looked close to the earlier 858 and better than JCD 8902, but still below Preciva 995D, Sugon 8630 PRO, and Quick 861DW.
Three stored programmes and flask-drop detection worked, but airflow rating was not verified and long-term reliability remains unknown.
Generated by the language model.
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Is the Yato YT-82457 750W hot air soldering station capable of desoldering components from a computer motherboard? Is its performance comparable to that of more expensive stations available for 100-250$? How is such a station constructed inside? I will try to check this here and present the results in the form of videos and graphs.
We start as usual with a presentation of the packaging and kit:
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Maximum air flow power is as usual 120l/min, similar to the other stations. I think of those I have tested so far only the Sugon 8630 PRO offered 200l/min.
The kit comes with instructions and additional nozzles:
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And then there is the station itself:
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Here is the first remark - this station has the possibility of setting three programmes which can make our work a little easier. The 858 discussed earlier did not offer this.
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The display is quite clear, while the casing seems to be quite cheap plastic.
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Instructions in Polish:
Specifications and description in Polish:
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Organisational issues .
Before we move on to the tests proper, I would like to highlight a few things here:
- all tests were performed on discs made from electro-waste
- the video clips do not show the correct methods of desoldering
- therefore in the videos I do not use kapton tape to protect adjacent components
- I do not ensure that the component does not "fly away" when blown by hot air
- the boards on the videos may not be thoroughly washed of flux
- in the videos I am "impatient" and move parts that should be left alone during the casting process, because if we use force we may break the pads
- etc. etc.
The topic "how to replace the MOSFET correctly and wash the board" will be covered separately. Here I am just testing hot air.
Videotests Yato YT-82457 .
Time for some experiments. For all the videos below I have made the following assumptions:
- at the beginning of the video the station is switched off, it is completely cooled down to room temperature, the board similarly
- 8.4mm nozzle or no nozzle (you can see in the video; yes, that's my nozzle, not any of the kit)
- highest blow rate, if the specification is to be believed, 120l/m
- films are not processed
Let's start with lower temperatures. 350°C, full blow, motherboard from a laptop, chip soldering in an SO8 or similar enclosure:
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90 seconds to remove, but this is without flux.
350°C, attempting to remove the coil from a large copper spout:
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Unsuccessful, I gave up after 2 minutes. I then let the plate cool down. Test at 400°C:
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Success in just over a minute.
400°C, soldering of the standing HDMI socket by heating on the other side of the PCB:
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It was possible to remove the socket without tearing the tracks or melting the socket itself.
450°C, MOSFET transistor soldering from a computer motherboard:
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Soldered out in less than a minute.
Drawings [/size]
Such games of soldering a component out of scrap in time may be fun, but it's also better to measure something. The standard assumption here is to use the largest overblow, although in many cases it could be reduced (then it could also heat a bit harder), but that's the assumption I started with and it's hard to change anymore.
I made the graphs based on my set up with a thermocouple:
OpenBeken configuration for hot air testing - MAX6675, temperature and power logging .
First a graph at 350°C:
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After about 100 seconds, the probe actually recorded over 300°C.
Interactive version:
https://openshwprojects.github.io/hotair/version5/350c.html
Now the graph at 450°C:
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After about 90 seconds, the probe actually recorded over 350°C, then the temperature already rose more slowly and approached 375°C in 200 seconds.
Interactive version of the graph:
https://openshwprojects.github.io/hotair/version5/450c.html The final evaluation will be in the last paragraph.
Interior .
We take a look inside:
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The first thing that catches the eye is the 50/60Hz mains transformer. The 858 had a boost converter.
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The ground is connected...
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Inside, the regulation is again on a BTA16-800B triac (in the 858 there was a BTA12), controlled by a MOC3041S.
The PCB designation is. YCD-858D. Well rather unsurprisingly, this is a very popular design.
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The whole design is based on the S3F94C4EZZ-DK94 MCU. The microcontroller is manufactured by Zilog. Next to it I also see an EEPROM - 24C02SN, I wonder what they hold there, calibration, settings?
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I was still interested in this transistor - it's a TIP122L, maybe from the air supply control? Interesting that it's mounted on an extra heatsink, although there's room on the PCB to solder it on. Maybe it was overheating in the previous version, hence the change?
Summary .
My first impression of this station is quite positive. I don't feel here the problem I wrote about with the JCD 8902 that the station lacks heating power at all, which meant that with the 8902 I wasn't able to remove the MOSFET transistor from the computer board without helping myself with a mainsheet or heater.
The measurements are not bad either, although here it should be borne in mind that I do not verify in my tests whether the airflow is really that 120l/min. In any case, comparing the performance of the stations I tested at the full blow setting, I see a lot of similarity between the Yato YT-82457 and the 858, the construction is also quite similar. The Preciva 995D is still slightly better than both of these stations, while all of them are further outperformed by the Sugon 8630 PRO and Quick 861DW. The JCD 8902 2 in 1 and the SP-1011DLR fall far behind.
I also tested the side functions such as the memory of three programmes (remembered when the power is switched off) and the detection of the flask being put down, I have no complaints here.
So the only question left is, what is a good buy on a budget of 35$? The previously tested Hot Air Station 858 was also good, but it did not have the possibility to set three programmes, so in terms of budget products, this one probably comes out on top. I wonder what its failure rate is after prolonged use, but I have no way of checking this "on the spot"....
And what is your opinion? Which hot air station do you use? Feel free to discuss. .
Attachments:
Instrukcja YT-82457.pdf(641.96 KB)
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Zamienniki YT-82457.pdf(1023.39 KB)
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About Author
p.kaczmarek2 wrote 14404 posts with
rating 12336 , helped 650 times.
Been with us since 2014 year.
I have a 2in1 WER 898D+, i.e. flask + Hotair.
I stopped using the flask a long time ago because the system is a bit of a failure. High inertia of the mainsail, not all heaters want to work, on top of... [Read more]
p.kaczmarek2
11 Nov 2024 19:55
Ksger T12 in smaller form (for external power supply) I tested, it is quite good:
Test of KSGER STM32 V3.1S OLED T12 soldering ministation and Fubarino SD soldering .
Supposedly, in its case, you... [Read more]
Mateusz_konstruktor
11 Nov 2024 22:45
A. The pictures don't do it justice, so I'm asking. What colour is the display?
B. What's the deal with the heatsink and the bent transistor? How is the whole thing mounted?
. [Read more]
p.kaczmarek2
11 Nov 2024 23:22
The heatsink is hanging in the air, I was a bit concerned about that. It looks as if this transistor was originally supposed to be soldered to the PCB (and the copper spout was supposed to dissipate heat)... [Read more]
ZbeeGin
12 Nov 2024 06:10
Well. a transistor that only miraculously does not break off during transport. Microswitches soldered on "in order to". And a solderless IEC socket... [Read more]
Karaczan
12 Nov 2024 23:16
.
Well that's what I have. Powered by a laptop power supply after a modification to increase the voltage (23.5V, 4.8A, can't remember from what)
As for your station, how does it react to putting the... [Read more]
FAQ
TL;DR: At $35 and 750 W, the Yato YT-82457 is, in the reviewer’s words, "probably the top budget pick" for users who want a cheap hot air station that can remove SO8 parts, MOSFETs, and even an HDMI port from motherboard-class boards without stepping up to $100–250 gear. [#21298835]
Why it matters: This FAQ helps repair hobbyists and budget buyers decide whether the Yato YT-82457 is strong enough for real motherboard work and what trade-offs its low-cost design brings.
Key insight: The Yato YT-82457 is not a high-end rework station, but it clears the most important budget test: it can desolder real motherboard parts at useful speeds. Its main advantage over a classic 858 is similar heating with added convenience features.
Quick Facts
Rated at 750 W with a claimed maximum airflow of 120 l/min; the kit includes extra nozzles and a clear display, though the casing feels like cheap plastic in hand. [#21298835]
In practical tests, an SO8-class chip came off at 350°C in about 90 seconds without flux, and a MOSFET came off at 450°C in under 1 minute. [#21298835]
A coil on a large copper area did not come off at 350°C after 2 minutes, but removal succeeded at 400°C in just over 1 minute. [#21298835]
Thermocouple logging showed the station reached over 300°C after about 100 s with a 350°C setting, and over 350°C after about 90 s with a 450°C setting, later approaching 375°C by 200 s. [#21298835]
Inside, the station uses a mains transformer, a BTA16-800B triac driven by MOC3041S, a YCD-858D-marked PCB, an S3F94C4EZZ-DK94 MCU, 24C02SN EEPROM, and a TIP122L on a separate heatsink. [#21298835]
How well does the Yato YT-82457 750W hot air station handle desoldering MOSFETs and HDMI ports from computer motherboards?
It handles those jobs well for a $35-class station. In the tests, it removed a motherboard MOSFET at 450°C in under 1 minute, and it removed a vertical HDMI connector at 400°C by heating from the other side of the PCB without tearing tracks or melting the socket. The same thread also shows an SO8-class part removed at 350°C in about 90 seconds, which confirms enough heat for common board repair tasks. [#21298835]
Yato YT-82457 vs classic 858 hot air station — which one is the better budget choice for about $35?
The Yato YT-82457 is the better budget choice if both cost about $35. The reviewer judged its heating performance as very similar to the classic 858, and the internal platform is also similar, but the Yato adds three memory programs and handle-down detection. That extra convenience matters in repeated repair work, because you can save common presets instead of dialing them in every time. [#21298835]
What is a BTA16-800B triac and what role does it play inside a hot air soldering station like the Yato YT-82457?
A BTA16-800B triac is a power semiconductor switch that controls AC mains loads, handling bidirectional current and letting the controller regulate heater power. In this station, the thread reports a BTA16-800B triac driven by a MOC3041S optocoupler, so it is part of the heater regulation path. The reviewer also notes that the older 858 used a BTA12 instead, making the Yato’s triac one visible hardware difference. [#21298835]
What is a reed switch in a hot air gun stand and how does it detect when the handle is put down for cooldown?
A reed switch is a magnetically operated contact switch that closes or opens when a nearby magnet changes its magnetic field, letting the station detect handle position without direct mechanical contact. In the discussion, one user says his station uses a reed switch in the stand and needed extra neodymium magnets so the handle could be placed down less precisely and still trigger cooldown. [#21300794]
How do the three memory programs on the Yato YT-82457 work, and what settings are worth saving in them?
They store three user presets and keep them even after power-off. The reviewer tested the memory and reported no complaints, so the feature works as expected. A practical setup from the thread would be: 1. save 350°C for lighter SO8 work, 2. save 400°C for larger joints like coils or HDMI work, 3. save 450°C for stubborn motherboard MOSFETs, all with high airflow because that was the main test condition. [#21298835]
Why did the Yato YT-82457 fail to remove a coil at 350°C but succeed at 400°C on a large copper area?
It failed at 350°C because the large copper area pulled heat away too quickly. In the test, the reviewer gave up after 2 minutes at 350°C, let the board cool, then succeeded at 400°C in just over 1 minute on the same type of joint. That result shows the station has enough heat for large thermal masses, but only when the temperature margin rises above the loss into the copper pour. [#21298835]
How should I choose temperature and airflow on a hot air station for SO8 chips, MOSFETs, coils, and HDMI connectors?
Use lower temperatures for small parts and step up for large copper or shielded joints. The thread’s working examples are clear: 350°C removed an SO8-class chip in about 90 s, 400°C handled a coil on a large copper area and an HDMI port, and 450°C removed a motherboard MOSFET in under 1 minute. The tests were run at the highest airflow setting, claimed as 120 l/min, so those numbers are the thread’s reference point. [#21298835]
What is inside the Yato YT-82457, and how does its internal design compare with the popular YCD-858D / 858 platform?
Inside, it looks very close to the common 858 family. The thread identifies a mains transformer, BTA16-800B triac, MOC3041S driver, YCD-858D-marked PCB, S3F94C4EZZ-DK94 MCU, 24C02SN EEPROM, and a TIP122L transistor on a separate heatsink. The reviewer explicitly says the construction is similar to the 858 and calls the YCD-858D layout a very popular design, which places this station firmly in that platform lineage. [#21298835]
Why would a hot air station use a mains transformer instead of a boost converter, and what difference does that make in practice?
In this thread, the practical difference is architectural, not a measured performance claim. The reviewer points out that the Yato uses a 50/60 Hz mains transformer, while the 858 he discussed earlier used a boost converter. He does not report a direct user-visible advantage from that alone, but he does show that the Yato still delivers workable heat on motherboard jobs, so the transformer-based build does not prevent effective budget performance here. [#21298835]
How accurate is the displayed temperature on the Yato YT-82457 compared with thermocouple measurements at 350°C and 450°C?
The displayed temperature reads higher than the thermocouple measurement point in the reviewer’s setup. At a 350°C setting, the probe recorded only over 300°C after about 100 seconds. At a 450°C setting, it recorded over 350°C after about 90 seconds, then rose more slowly and approached 375°C by 200 seconds. Those graphs show useful heating, but not a one-to-one match between display value and measured probe temperature. [#21298835]
What does Kapton tape do during hot air desoldering, and when should it be used to protect nearby components?
Kapton tape protects nearby parts from hot airflow during rework. The reviewer explicitly warns that his videos do not show proper desoldering practice and says he did not use Kapton tape there because the clips were only performance tests on scrap boards. That means you should treat the videos as stress tests, not best practice, and use Kapton when adjacent components, plastics, or connectors could be overheated or blown away. [#21298835]
How does the Yato YT-82457 compare with the Preciva 995D, Quick 861DW, Sugon 8630 Pro, JCD 8902, and SP-1011DLR for heating performance?
It sits in the middle of the tested group. The reviewer says the Yato YT-82457 and the 858 feel very similar at full airflow, the Preciva 995D is slightly better than both, and the Sugon 8630 Pro plus Quick 861DW outperform all of them by a wider margin. He also says the JCD 8902 2-in-1 and SP-1011DLR fall far behind, making the Yato a solid budget option but not a substitute for higher-end rework stations. [#21298835]
Why is the TIP122L transistor in this station mounted on a separate heatsink, and what problems could that layout cause over time?
The thread suggests it was moved to a separate heatsink because heat management on the original PCB position was not good enough. The reviewer notes that there is room to solder the TIP122L directly to the PCB, but the installed version uses an added heatsink, and he speculates this may reflect an earlier overheating issue. Another participant criticizes the mechanical execution, warning that a poorly supported transistor can risk breaking off during transport or long-term handling. [#21298835]
What should I check for safety and build quality when buying a cheap hot air station, such as grounding, IEC socket mounting, and loose internal parts?
Check grounding first, then look for solid connector mounting and secure internal parts. In this thread, the reviewer confirms the ground connection is present, which is a positive sign. A later comment flags three build-quality risks to watch for in cheap stations: a transistor hanging in the air, microswitches soldered carelessly, and an IEC mains socket that appears poorly mounted. Those details matter because a low-cost station can work well thermally while still having weak mechanical assembly. [#21299372]
How does the Yato YT-82457 react when the hot air handle is placed back on the stand, and what can be done if the sleep or cooldown detection is unreliable?
It correctly detects the handle being put down and starts the expected stand function. The reviewer says he tested the handle-down detection and had no complaints. If a similar station reacts unreliably, the thread gives one concrete fix: add strong neodymium magnets in the stand so the reed-switch system detects the handle over a wider placement range instead of only in one precise position. [#21298835]
Comments
I have a 2in1 WER 898D+, i.e. flask + Hotair. I stopped using the flask a long time ago because the system is a bit of a failure. High inertia of the mainsail, not all heaters want to work, on top of... [Read more]
Ksger T12 in smaller form (for external power supply) I tested, it is quite good: Test of KSGER STM32 V3.1S OLED T12 soldering ministation and Fubarino SD soldering . Supposedly, in its case, you... [Read more]
A. The pictures don't do it justice, so I'm asking. What colour is the display? B. What's the deal with the heatsink and the bent transistor? How is the whole thing mounted? . [Read more]
The heatsink is hanging in the air, I was a bit concerned about that. It looks as if this transistor was originally supposed to be soldered to the PCB (and the copper spout was supposed to dissipate heat)... [Read more]
Well. a transistor that only miraculously does not break off during transport. Microswitches soldered on "in order to". And a solderless IEC socket... [Read more]
. Well that's what I have. Powered by a laptop power supply after a modification to increase the voltage (23.5V, 4.8A, can't remember from what) As for your station, how does it react to putting the... [Read more]