Second-sourcing an aluminium electrolytic capacitor? Capacitance and voltage are only the first two lines. Match these four as well.
1. Endurance: hours at temperature. "2000 h at 105 °C" and "2000 h at 85 °C" are different parts, and so are 2000 h and 5000 h at the same temperature. The endurance line decides how the part ages in your product, so compare it line for line.
2. Impedance class. Standard, low-impedance and extra-low-impedance series share the same capacitance and voltage codes. On the output of a switching regulator, a swap between classes changes ripple behaviour. Check the impedance or ESR figure at the frequency your design uses.
3. Temperature range. A lower limit of −55 °C and one of −40 °C look similar on a BOM line, but one of them may not cover your product's storage and transport conditions. Confirm both ends of the range.
4. Mounting and soldering. SMD V-chip parts are rated for reflow; radial parts are not. Confirm the footprint, the height limit and the soldering profile the datasheet actually allows.
Put the reference part's datasheet next to the candidate's and go down these lines one by one. If a line does not match, the engineer who owns the design decides whether it matters.
Pro-An is an independent distributor based in Hong Kong and Shenzhen since 1992. Our own passive brand, KOME, includes SMD aluminium electrolytic series across these endurance, impedance and temperature classes. We send datasheets and samples first, and propose a part only where the key parameters match the reference you give us. Your engineers make the call. ISO 9001:2015 certified (Certificate No. 11326Q02187R001).
Send us your reference part number. We reply with the datasheet comparison before anything is ordered.
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