The SCMR18D105PSBB0H: For a BOM line that already specifies this order code, the Active status removes the urgency to qualify a substitute — the part will be available for the foreseeable production horizon.
1 F at 5.4 V — sizing the hold-up or power buffer
Rated 1 F capacitance at 5.4 V working voltage. The stored energy is 14.58 J (E = ½CV²) — enough to hold up a microcontroller or RTC through a brief mains dropout, or to supply a peak current burst for a GSM/Wi-Fi transmission without pulling the main supply rail down. The 0%, +100% tolerance is standard for supercapacitors — the actual capacitance can be up to 2 F at delivery. For timing or balancing circuits, design for the worst-case minimum (1 F) and let the extra headroom improve hold-up margin. 250 mOhm ESR at 1 kHz limits the charge/discharge current and sets the I²R heating. At a 2 A pulse, the internal voltage drop is 0.5 V and the power dissipation is 1 W — the cell will self-heat, so pulse duty cycle must stay within the 1000-hour lifetime budget at 65°C.
Through-hole radial can — board integration
The radial can package with PC pins and 11.50 mm lead spacing fits a standard 0.453-inch pitch footprint. The Bulk package means the capacitor ships loose in a tube or tray — no tape-and-reel, so hand-insertion or wave-solder pallet is the assembly method. Plan for manual or selective soldering; not compatible with high-speed pick-and-place without a custom feeder.