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I need some help identifying this component. It's similar to one of the components that burnt to the bottom left of the image, so I need to replace it.

It is on the laptop charging circuit, if that helps. It looks like a diode, but I've never seen one with that [ + ] symbol.

photo of PCB with unknown component marked

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2 Answers 2

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It appears to be a 100uF/20V Panasonic 20TQC100MYF or 20TDC100MYF tantalum polymer capacitor (POSCAP™). D is the voltage code.

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That's a tantalum capacitor, not a diode. Most likely 100 μF from the marking.

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  • \$\begingroup\$ Yep. Why wouldn't I thought it was a capacitor as I've never seen one like that. Thanks \$\endgroup\$
    – Alpha Adhito
    Commented Sep 10, 2022 at 14:22
  • \$\begingroup\$ @AlphaAdhito Tantalum capacitors are rather uncommon these days, though they used to be more common. They're smaller than aluminum electrolytics and can handle higher temperatures (as the electrolytic isn't water-based), but they're more expensive and their failure modes involve bursting into flames (so they need to be used with care). The availability of modern high-capacitance MLCCs (a type of ceramic capacitor) has relegated tantalum capacitors to basically nothing but very small form-factor power supplies, like those in mobile devices. \$\endgroup\$
    – Hearth
    Commented Sep 10, 2022 at 17:52
  • \$\begingroup\$ 100% concur about the "bursting into flames" failure mode as in my case. Luckily nothing except the plastic cover that got burnt. \$\endgroup\$
    – Alpha Adhito
    Commented Sep 11, 2022 at 13:46

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