Six Walsin MLCC Series Return Zero Parts on the Search Tool

Six Walsin Technology MLCC series have a published datasheet but return zero parts on Walsin’s own
parametric search: VT, 0612, OP, S3, SG High Voltage and SH High Voltage. Venatech queried all 16
series groups directly and confirmed each of the six returns nothing — not a filter problem, not a
temporary gap, a series that is datasheet-only as far as the public search tool is concerned.

Venatech Limited, an authorised Walsin distributor in Hong Kong, checked the MLCC product search of
Walsin Technology (Walsin) against its full datasheet set and parametric extract — 24,025
real parts across the 16 series that do return results. What follows states only what we measured,
flags what we are inferring, and names what we cannot confirm.

Which six Walsin MLCC series return zero searchable parts?

VT, 0612, OP, S3, SG High Voltage and SH High Voltage. Each has a datasheet on file, and querying
Walsin’s export for that series returns the note “this series has a datasheet but no individual
part numbers in Walsin’s searchable database,” checked 14 September 2026:

This is distinct from a separate, smaller gap elsewhere in the catalogue: four more series — RH, RT
and both Mega Cap variants (M and V) — are on Walsin’s marketing pages with a full datasheet but do
not appear as a filterable series in the search tool at all. The six above do appear as a named
series filter; the filter simply returns nothing.

Does the zero-result series have a working sibling?

Yes, in three of the six cases, and that pairing is the new measurement in this post. Three of the
zero-result series sit directly alongside a standard-voltage or standard-rating sibling that returns
a large, real part count:

SG31B222K631 (2200 pF, X7R, 630 Vdc) and SG18N821J500 (820 pF, NP0, 50 Vdc) are both real,
searchable SG-series parts. SH18B683K101 (68 nF, X7R, 100 Vdc) is a real, searchable SH-series
part. S252B272K502 (2.7 nF, X7R, 5000 Vdc) is a real, searchable S2-series safety part. None of
the four has a counterpart in SG High Voltage, SH High Voltage or S3 — an engineer who needs the
same construction at a higher voltage band, or the X2/Y3 safety class instead of X1/Y2, finds
nothing to filter against.

Why would a series have a datasheet but no searchable parts?

We do not know, and we are not going to guess on Walsin’s behalf. Possible explanations include a
series that is sampled or build-to-order only, a search tool that has not been populated for a
smaller line, or a series that has been superseded but whose datasheet has not been withdrawn. All
three are consistent with what we measured; none is confirmed. The practical fact for a sourcing
decision is the same regardless of cause: nothing in these six series can be found, compared or
priced through Walsin’s own parametric tool today.

Does this affect every voltage and safety variant equally?

No — this is uneven across the three families we checked, which is itself worth stating plainly.
Standard-voltage soft termination (SH, SG) and the lower safety class (S2, X1/Y2) are both well
populated — 1,524 and 65 and 173 parts respectively. The higher-rated sibling in each family — high
voltage or the X2/Y3 class — returns nothing. A sourcing search that only tries the standard series
name would never notice the gap, because the standard series looks fully stocked with real part
numbers.

What should I do if I need a part from one of these six series?

1. Confirm with Walsin or an authorised distributor whether the series is still active before
   specifying it. A datasheet being on file does not confirm current production or availability.
2. Check whether the standard-voltage or standard-class sibling actually covers your
   requirement. The SH datasheet’s own voltage range runs higher than what is searchable under the
   plain SH filter; your target voltage may already sit inside a series that is fully searchable.
3. Do not assume a zero-result series is discontinued. We hold no Walsin end-of-life list and
   are not asserting one — “zero searchable parts” and “discontinued” are not the same claim, and we
   are only making the first one.
4. Ask us to check for a specific part number if you have one from an older BOM or a competitor
   cross — we can confirm whether it still resolves against Walsin’s current data.

For how soft-termination constructions differ from each other in the series that are searchable, see
Soft termination MLCC: SH, SG, ST and VT. For the X1/Y2
safety class that does return results, see X1/Y1 vs X1/Y2 safety
capacitors. The full range is on the Walsin MLCC
range page.

The short version

VT, 0612, OP, S3, SG High Voltage and SH High Voltage return zero parts on Walsin’s MLCC search
tool despite carrying a datasheet, confirmed by direct query on 14 September 2026. Three of the six
sit next to a working sibling series with real, searchable parts — SG (65), SH (1,524) and S2
(173) — which makes the absence easy to miss if you only search the sibling name. We do not know
why, and we are not claiming the series are discontinued; we are reporting what the search tool
returns today.

Send us the series and the specification you need, and we will tell you plainly whether it is
searchable, datasheet-only, or something we have to confirm with Walsin directly. Or give us an
old part number and ask us to check it against current data.

Faster than an email. The cross-reference tool takes a pasted list or a spreadsheet and returns Walsin ceramic capacitor candidates field by field, differences included. Ready stock shows what is physically in Hong Kong, so you can see straight away whether a line is a stock pull or a production slot.

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