01005 MLCC for SMPS filtering
The JMK042BJ332KC-W is a 3300 pF X5R ceramic capacitor in a 01005 (0402 metric) surface-mount case, rated 6.3 V with ±10% tolerance. Its primary application is SMPS filtering — the capacitance value and voltage rating place it in the decouple/bulk-decouple role on switching supply rails where board space is at a premium.
01005 footprint and assembly reality
The body measures 0.40 mm × 0.20 mm with a maximum thickness of 0.22 mm — the 01005 is one of the smallest standard SMD packages and demands precise paste deposition and vision-assisted placement. At 6.3 V and 3300 pF the part generates negligible self-heat; thermal relief on the pads is governed by the surrounding board design rather than the component itself.
Temperature grade and filtering context
X5R temperature coefficient means the capacitance drifts within ±15% over the -55°C to 85°C operating window — adequate for most industrial and consumer power rails, but verify the total tolerance stack against your ripple budget if the ambient swings wide. The -55°C lower limit covers cold-start and outdoor deployments; the 85°C ceiling suits enclosed equipment but not direct engine-bay or exhaust-adjacent locations.
Active supply and sourcing posture
No official second-source or cross-reference is listed in the ledger for this specific order code, so a BOM substitution requires direct confirmation with the supplier.