1 µF at 35 V — the B-case workhorse for rail decoupling
The TAJB105K035K is a 1 µF ±10% molded tantalum capacitor rated at 35 V in the B case (1210 / 3528 metric footprint). It belongs to the TAJ series, KYOCERA AVX's general-purpose manganese-dioxide tantalum line, and is specified for surface-mount assembly on tape-and-reel. At 1 µF and 35 V, this part fits decoupling applications on 24 V or 12 V rails where the margin to the 35 V rating covers transients without derating worry. The 6.5 Ω ESR at 100 kHz governs ripple current capability — higher ESR means the part self-heats more under AC ripple, so it suits low-ripple positions like output filtering on linear regulators or as a bulk cap after a moderate-switching DC-DC converter.
Footprint and temperature envelope
Molded construction means the epoxy case resists mechanical stress during reflow and handling better than conformal-coated parts, and the orientation mark (a stripe on the positive end) is visible under inspection — useful for the bench when hand-placing or reworking a board.