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I have a video doorbell system with a faulty power connector, 2pin.

Can you identify these connectors? The pitch is about 2mm.

enter image description here

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    \$\begingroup\$ Please, no "about". Measure distance between several pins and divide it, that way you will also divide your measurement error, so it will be clear what exactly the pitch is, namely 2mm or 2.54mm. I suggest you go to mouser or digikey, they have a lot of similar connectors \$\endgroup\$
    – Ilya
    Aug 31 at 9:27
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    \$\begingroup\$ Pretty sure it's a connector from Molex or JST, maybe PH serie for example jst.fr/fr/produit/ph_159 Do you have the exact pitch ? And other photos ? \$\endgroup\$
    – AdrienC
    Aug 31 at 10:28
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    \$\begingroup\$ (To get the most accurate pitch measurement, measure distance between the four pins, and divide by three [generally pitch = distance / (npins - 1)]). \$\endgroup\$ Aug 31 at 11:06
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    \$\begingroup\$ Unrelated to the question, the crimp job on the black cable is horrible and likely the reason for any problems you are having. \$\endgroup\$
    – Lundin
    Aug 31 at 14:33
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It is manufacturer JST, PH family of 2.0mm pitch connectors. Part number for top entry through-hole 4 pin should be B4B-PH-K-S. In case they are SMD (your pic is too bad to tell), then it is B4B-PH-SM4-TB instead.

https://www.jst-mfg.com/product/detail_e.php?series=199

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I used this Connector Identification Utility to identity them as Wurth WR-WTB 620 connectors. Part number 620304124022 Digikey page.

"Disclosure: I created and run the Connector Identification Utility website linked in this answer"

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