MLCC Capacitance by Case Size: Walsin’s Maximum Value Catalogued

MLCC capacitance by case size in Walsin’s catalogue runs from 100 nF at the ultra-small 01R5 case
to 220 µF at both 1206 and 1210, measured directly against the 24,025-part parametric extract.
General Purpose X5R parts hold the ceiling at nine of sixteen case sizes; higher-voltage and
RF-oriented series hold it at the rest, where a tighter dielectric trades capacitance for voltage
or Q.

Venatech Limited, an authorised Walsin distributor in Hong Kong, built this table from the full MLCC
parametric extract of Walsin Technology (Walsin) — 24,025 real parts across 16 series — after
excluding the known defective rows described below. Every part number in this post is real and
appears in the extract.

What is the maximum capacitance available in each Walsin MLCC case size?

A single part per size, identified by actual Farad value rather than by the printed string
(220uF and 2200nF do not sort against each other as text, so Venatech converted every row to
Farads before ranking):

General Purpose (X5R or X7R) holds the ceiling at 9 of the 16 case sizes. The rows where it does
not — 0505, 1111, 1808 and 2211 — are exactly the sizes where a specialised series exists for Q
factor, high voltage or safety rating, and every one of those trades capacitance for that other
property. The 0505 and 1111 ceilings come from the Microwave
RF
datasheet, the 1808 ceiling from Middle and High
Voltage,
and 1825/2220/2225 from 1825/2220/2225 Large
Size.
General Purpose figures are from the General
Purpose
datasheet.

Why does the larger 1210 case not offer more capacitance than 1206?

It does not, in this catalogue, and that is worth checking before paying for the larger footprint.
Both 1206 and 1210 top out at exactly 220 µF, each with exactly two part numbers at that value — one
rated 4 Vdc, one rated 6.3 Vdc:

1210 is wider and thicker than 1206 — 2.50 mm against 1.60 mm on both dimensions — for the same
220 µF ceiling. The extra volume does not raise the capacitance figure anywhere in Walsin’s General
Purpose extract. If a BOM calls for 1210 specifically because “bigger should mean more
capacitance,” that assumption does not hold at the top of this catalogue; check whether 1206 already
meets the value before specifying the larger, costlier footprint.

Which dielectric and series dominate the top of the capacitance range?

X5R, inside General Purpose, every time capacitance rather than voltage or precision is the
priority. Every case-size ceiling from 0201 through 1210 is an X5R or X7R General Purpose part
rated 4 or 6.3 Vdc — the lowest voltage rating in the catalogue, which is the trade Class II
dielectrics make for volumetric efficiency. The moment a case size’s ceiling comes from a different
series, the rated voltage jumps by two to three orders of magnitude: 250 Vdc at 0505, 500 Vdc at
1111, 630 Vdc at 1808, 5000 Vdc at 2211.

That pattern is the practical takeaway: a design that needs both high capacitance and high voltage
in the same case size will not find a single part number doing both at the top of Walsin’s range.
The 2.7 nF ceiling at 2211 is not a shortage of General Purpose high-capacitance parts at that size —
it is what is left once the part must also survive a 5000 Vdc peak safety rating.

Are there errors in Walsin’s own capacitance data?

Yes — seven rows, and every one is recoverable from the part number itself. Venatech found these
while converting the Capacitance column to a numeric value for this comparison; none is visible to
a text or numeric filter run directly against the field as exported.

Three of the seven — MT31B474J101, MT31B474K101 and MT31B474M101, the three tolerance variants of one part — carry the full string
/wp-content/uploads/datasheet/WTC_MLCC_Automotive_MT.pdf where a capacitance value belongs, which
is a datasheet-link field overwriting the parametric one rather than a typo. 0201N0R1D250 shows
the same overwrite and additionally has its Rated Voltage value duplicated into the L field,
so two columns are affected on that single row. None of the seven was previously logged; all are
excluded from the capacitance table above and should be excluded from any script run directly
against the raw Capacitance column.

How do I find the highest-capacitance part at my case size?

1. Confirm the case size against this table first, not against a filtered search — the
   ceiling will not change by sorting on the live site’s capacitance column, which reads the same
   export.
2. Check whether the part also needs a rated voltage above a few volts. If so, expect the
   usable ceiling in that case size to be far below the table value, because the table maximum is
   almost always a 4 Vdc or 6.3 Vdc X5R part.
3. Treat a pF, nF or uF string from the export as provisional until you have confirmed it
   is not one of the seven corrupted rows above, or a sibling with the same EIA code, if the part
   number looks unfamiliar.
4. Cross-check against the datasheet, not just the parametric export, before committing a
   high-capacitance part to a BOM.

For how the capacitance and voltage codes are built into the part number itself, see How to read a
Walsin MLCC part number. For the dielectric trade-off
behind the voltage jump at the top of this table, see NP0 vs X7R vs X5R: which MLCC
dielectric. The full range is on the Walsin MLCC
range page.

The short version

Walsin’s MLCC capacitance ceiling by case size runs from 100 nF at 01R5 to 220 µF at both 1206 and
1210 — the larger 1210 case buys no extra capacitance over 1206 in this catalogue. General Purpose
X5R or X7R holds the ceiling at 9 of 16 sizes, always at 4 or 6.3 Vdc; wherever a different series
holds it, rated voltage is two to three orders of magnitude higher and capacitance falls
accordingly. Seven rows in the raw Capacitance column are corrupted or empty and need the sibling
part number’s EIA code to recover.

Send us the case size and the voltage the part has to hold, and we will tell you the real ceiling
for that combination — not just the case size’s theoretical maximum. Or give us a part number and
ask us to confirm its capacitance against the datasheet.

Two things you can do without waiting for a reply. Cross your part — paste a single number or drop in an Excel or CSV of the whole line, and each result names what matches and what does not. And ready stock lists the ceramic capacitor part numbers held in Hong Kong, with an RFQ against any of them.

Frequently asked questions