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So here's the run down, I purchased a rework/soldering iron station off eBay years ago. Believe it's a cheap Chinese knock off labeled CE 852D+

Recently the heater element for soldering iron went bad. Bought what I thought would be an exact replacement but it was slightly longer. Original on top

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Tried installing and this was the result

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I tested it and it seems to work fine in terms of heating up and detecting the temp setting. I'm wondering if I alter the little indents on the bottom that seat into the soldering iron PCB so it recesses just enough to fit flush, if it would be safe to use?

I also noticed writing on the iron handle that faded and all I can make out is "907" and the last letter I think was an "A"

Also the soldering iron PCB has a "YH936B-5" marking on itenter image description here

Should I be looking for a heater element for a 907A instead of the station 852D+?

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If the old element is already bad, I would recess it twice so much to see, if I would hit comething other, than just ceramic cover. If in the double depth is not anything else than ceramic, I would feel confident to recess the new one the single lenght. (But the less it is recessed, the better)

(douyble the recess, so I would be sure, that I did not stopped "just a hair" from heating wire, and that the new one have probably enought of isolation left after shorting it)

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  • \$\begingroup\$ I'm confused. Are you saying to recess the tip? I was thinking lengthening the two notches on the bottom so it sits lower on the PCB of soldering iron \$\endgroup\$
    – ohmmy
    Jan 27, 2017 at 0:36
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    \$\begingroup\$ So I did not understood you question well, my bad. (English is not my native lang). IMHO if you lenghten the nothes, it is safer way, as it can be undone. But the wide part might serve as support too, so make sure, it still fits well mechanically. I think, it will be OK too. On my soldering station I would do it and I think it would work OK, but it have slightly different construction. \$\endgroup\$
    – gilhad
    Jan 27, 2017 at 1:14
  • \$\begingroup\$ It wouldn't cause any damage to the station if say the heater element resistances internally aren't identical? \$\endgroup\$
    – ohmmy
    Jan 27, 2017 at 1:31
  • \$\begingroup\$ Ops, I did not think about that, as you did not mentioned it and I would order something with same electrical characteristics if I could. So if the resistance is nearly the same, it is not problem, as it gets regulated depending on the temperature generated. But if your new heater have lesser resistance, it would enable more current thru and may damage the station (I would not risk take more than 10% more current, if I do not know the characteristic) \$\endgroup\$
    – gilhad
    Jan 27, 2017 at 1:54
  • \$\begingroup\$ on the other hand if the new have larger resistance, the current will be much less and so the power, so it would not be able to reach maximum temperature consistently (if at all) and will take longer to heat-up, but it probably would not harm the station (see if there is something in documentation - mainly if it say that turning the station on without heating pen attach can harm it, then big resistance can have similar effect, but I do not expect current-source there. Voltage source with PWM or swithing on/off is IMHO more usual) \$\endgroup\$
    – gilhad
    Jan 27, 2017 at 1:58

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