These tat's are definitely installed vertically (Standing up), the marketing on these is "compact space saving tantalum capacitors". The one I'm showing are a older design. KEMET has now put a "radial curve" on the anode side of the capacitor and now puts the makings on the top surface of the capacitor. They indeed or not a SMD, but what they call a PMD - Precision Molded Device. One of the unique identifiers for these tat's is the bottom shape. Coppied straight from the data sheet: " These standoffs, located in the base of all case sizes, provide vents for air circulation and also allow easy removal of flux residues from lead wire and circuit board solder joints."
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