Chadti99 wrote on 2022-02-27, 12:49:

This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the pola […]
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This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the polarity but is the top or bottom the voltage or capacity, what’s the “d” for?

01E60FE8-9C6A-4BB0-9A15-1CE48C8B3B28.jpeg

Had one explode in spectacular fashion.
3AF88075-C417-4D13-934D-650EF590C11E.jpeg

Assuming the code is the same as the one used by Matsuo capacitors ( https://etechcomponents.com/wp-content/upload … 08/204_en-1.pdf ) and that my understanding is correct,

this is a 10 uF capacitor, rated for 16V , where the lead closest to the plus sign is the anode and the letter D refers to an, IMHO, rather arcane date code (see https://electronics.stackexchange.com/questio … ponents-marking ) with a 4-year cycle, where the "D" (case sensitive) likely means a production date of April 1993 in this case if my extrapolation is correct (as April 1989 or April 1997 wouldn't make sense in this case).

darry wrote on 2022-02-27, 16:03:

Chadti99 wrote on 2022-02-27, 12:49:

This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the pola […]
Show full quote

This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the polarity but is the top or bottom the voltage or capacity, what’s the “d” for?

01E60FE8-9C6A-4BB0-9A15-1CE48C8B3B28.jpeg

Had one explode in spectacular fashion.
3AF88075-C417-4D13-934D-650EF590C11E.jpeg

Assuming the code is the same as the one used by Matsuo capacitors ( https://etechcomponents.com/wp-content/upload … 08/204_en-1.pdf ) and that my understanding is correct,

this is a 10 uF capacitor, rated for 16V , where the lead closest to the plus sign is the anode and the letter D refers to an, IMHO, rather arcane date code (see https://electronics.stackexchange.com/questio … ponents-marking ) with a 4-year cycle, where the "D" (case sensitive) likely means a production date of April 1993 in this case if my extrapolation is correct (as April 1989 or April 1997 wouldn't make sense in this case).

Thanks for this Darry! I was able to source replacement tantalum caps and had to replace one more before the board fired right up no issues. Had no idea these things could fail so spectacularly.

Chadti99 wrote on 2022-03-05, 17:28:

darry wrote on 2022-02-27, 16:03:

Chadti99 wrote on 2022-02-27, 12:49:

This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the pola […]
Show full quote

This is on a Promise VLB 2300 controller. It has six of these guys. Top text is 10+ and bottom is 16d. I get the + is the polarity but is the top or bottom the voltage or capacity, what’s the “d” for?

01E60FE8-9C6A-4BB0-9A15-1CE48C8B3B28.jpeg

Had one explode in spectacular fashion.
3AF88075-C417-4D13-934D-650EF590C11E.jpeg

Assuming the code is the same as the one used by Matsuo capacitors ( https://etechcomponents.com/wp-content/upload … 08/204_en-1.pdf ) and that my understanding is correct,

this is a 10 uF capacitor, rated for 16V , where the lead closest to the plus sign is the anode and the letter D refers to an, IMHO, rather arcane date code (see https://electronics.stackexchange.com/questio … ponents-marking ) with a 4-year cycle, where the "D" (case sensitive) likely means a production date of April 1993 in this case if my extrapolation is correct (as April 1989 or April 1997 wouldn't make sense in this case).

Thanks for this Darry! I was able to source replacement tantalum caps and had to replace one more before the board fired right up no issues. Had no idea these things could fail so spectacularly.

Glad I could help .

I would consider replacing all those tantalums as I wouldn't be surprised that more will eventually fail . I have read somewhere that modern tantalum caps are more reliable, not sure if this accurate or why this is .