Bulk capacitance for 35 V rails — ESR and temperature profile
The TPSE226K035P0300: That ESR figure governs the ripple current the part can handle before self-heating becomes the limiting factor — in a 35 V rail with 100 kHz switching ripple, the 300 mOhm keeps the I²R loss low enough that the capacitor stays within its rated temperature rise at typical load currents. For a 24 V nominal bus with 35 V transients, this part provides margin without needing a higher voltage rating that would increase ESR and package size.
Footprint and layout — 2917 E case
The molded case offers a flat top for pick-and-place nozzle vacuum pickup, and the tape-and-reel packaging (cut tape available) supports high-volume assembly without a changeover. Surface-mount termination on a 2-layer board requires a solid copper pad under the capacitor to spread heat during reflow — the 7343 metric footprint is wide enough that a 0.5 oz copper pour under the part keeps the peak reflow temperature within the MSL 3 rating typical for molded tantalums.
Lifecycle and sourcing — active, no end-of-life pressure
No franchised allocation constraints apply; the part is quoted to order.