VOGONS


capacitor value.

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First post, by kenan83

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Hello. In the picture I shared, the blue capacitor is broken. It says 155Z2 on it. I want to replace this capacitor but I don't know the uf value. I would be glad if you help.

Reply 1 of 6, by Horun

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A 1.5uF (or 1500nF or 1500000pF). The first two digits are the value, the last is multiplier, so 15 + 5 zeroes = pF value.
The Z and 2 are tolerance voltage codes. Z is 20% and 2 is 50v iirc
Something like: https://www.mouser.com/ProductDetail/Murata-E … xvhVVoDXnz20%3D
or maybe https://www.mouser.com/ProductDetail/KEMET/C3 … 4IzPZtfHseJQ%3D

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 6, by kenan83

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Horun wrote on 2022-08-27, 21:57:
A 1.5uF (or 1500nF or 1500000pF). The first two digits are the value, the last is multiplier, so 15 + 5 zeroes = pF value. The Z […]
Show full quote

A 1.5uF (or 1500nF or 1500000pF). The first two digits are the value, the last is multiplier, so 15 + 5 zeroes = pF value.
The Z and 2 are tolerance voltage codes. Z is 20% and 2 is 50v iirc
Something like: https://www.mouser.com/ProductDetail/Murata-E … xvhVVoDXnz20%3D
or maybe https://www.mouser.com/ProductDetail/KEMET/C3 … 4IzPZtfHseJQ%3D

Thanks for your help.

Reply 3 of 6, by kenan83

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kenan83 wrote on 2022-08-28, 02:35:
Horun wrote on 2022-08-27, 21:57:
A 1.5uF (or 1500nF or 1500000pF). The first two digits are the value, the last is multiplier, so 15 + 5 zeroes = pF value. The Z […]
Show full quote

A 1.5uF (or 1500nF or 1500000pF). The first two digits are the value, the last is multiplier, so 15 + 5 zeroes = pF value.
The Z and 2 are tolerance voltage codes. Z is 20% and 2 is 50v iirc
Something like: https://www.mouser.com/ProductDetail/Murata-E … xvhVVoDXnz20%3D
or maybe https://www.mouser.com/ProductDetail/KEMET/C3 … 4IzPZtfHseJQ%3D

Thanks for your help.

Hello. Can I use 1.5uf 400v instead of 1.5uf 50v? I couldn't find any lower voltage. Also, the capacitor I bought is non-polar, will there be any problems? Thank you from now.

Reply 4 of 6, by majestyk

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Isn´t this 400V type far too large (and expensive)?

You can always replace a polar-capacitor by a non-polar one but not vice versa.
But here the original capactior IS non-polar too, so don´t worry.

Reply 5 of 6, by Horun

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Yeah just a little too large 😀, looks about 3mm lead spacing on the mobo if those SMT are 2mm long (a typical size). Most of the 400v units are 20mm spacing from a quick search....
My first link above is 5mm spacing, the second is 2.5mm spacing.. just for reference.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 6 of 6, by karakarga

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If it is on a mainboard, you don't need a high capacitor like 400 Volt. The part even looks small. Look for a maximum of 50 Volts.