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I am trying to repair a device that was handed to me. It has a broken tantalum capacitor with a missing lead, so it needs replacement. However I'm having trouble identifying its capacitance, voltage etc. I believe it's a KEMET T494 series but I can't say for sure. The markings on the capacitor are 'E105'. Does anyone have any ideas?

photo of capacitor

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    \$\begingroup\$ I would guess a 1uF 25v polarised capacitor \$\endgroup\$ – Soldersmoke Sep 11 '19 at 7:52
  • \$\begingroup\$ What makes you think it is Kemet T494? That's a low ESR series, meaning it would be a specialized cap. Also, nothing of these markings is remotely near the Kemet ones. \$\endgroup\$ – Lundin Sep 11 '19 at 7:56
  • \$\begingroup\$ @Lundin I thought the 'O' like marker on the polarity stripe looked like the one that the T494 series have according to this site but since I'm not really familiar with other manufacturers I couldn't say for sure. \$\endgroup\$ – CapacitaurusRex Sep 11 '19 at 8:22
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"105" usually means 10 pF x 100000. The "5" parts represents the number of zeros in the multiplier. "104" would be 100 nF. "103" would be 10 nF and "102" would be 1 nF.

Many companies use "E" to symbolize 25 volts and, as an example I've seen "A" used to represent 4.0 volts, B to represent 6.3 volts, C to represent 10 volts, D to represent 15 (or sometimes 16) volts hence, E represents 25 volts.

But, there are other code systems for the capacitor's voltage rating such as this: -

enter image description here

However, and luckily, E represents 25 volts in both systems. Another system that also uses "E" to represent 25 volts: -

enter image description here

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  • \$\begingroup\$ Thanks! The voltage seems to check out with some different tantalum caps on the same trace which where rated for 25V as well (Larger case-size so hence better markings). \$\endgroup\$ – CapacitaurusRex Sep 11 '19 at 8:42
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It seems like a Tantalum Poly Cap and the E would be 25V and the 105 would be 10+5 Zeros in pF or 1uF. The circle seems to indicate Kemet. Here is a snip from a similar Vishay Cap.

enter image description here

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