Passive component country of origin is not in anything we hold. We re-opened all 451 pages of our 28 Walsin datasheets and all 203 parametric export files for this post, and the result is the same zero it was last time: no country, no city, no plant. For a United States buyer, we will not guess it.
Venatech Limited, an authorised Walsin distributor in Hong Kong, holds 28 Walsin Technology (Walsin) datasheets totalling 451 pages and all 203 of Walsin’s parametric export files, covering 359,135 distinct part numbers. We re-ran the full-text search and the column-header search behind this post from scratch rather than copy the earlier count forward, because a re-measurement is the only way to be sure a finding still holds. Every part number below is real and every count is of documents, pages or part numbers — never pieces.
Does any of our 451 Walsin datasheet pages name a country of origin?
No. We searched the full text of all 451 pages for 33 terms — country and territory names, city and province names associated with passive component manufacturing, “Made in”, “country of origin”, “plant”, “factory”, “manufacturing site”, “assembled in” and several more. Every one of the 33 terms returns zero pages, on this pass exactly as on the last one.
| What we searched 451 pages for | Pages found |
|---|---|
| Ten country and territory names | 0 |
| Nine manufacturing city and province names | 0 |
| “Made in” / “manufactured in” / “assembled in” | 0 |
| “plant” / “factory” / “manufacturing site” | 0 |
| “country of origin” / “origin” | 0 |
| Any postal address | 0 |
| “WTC” (Walsin’s own short name) | 199 |
| “contact … local representative” | 102 |
That last two rows are the ones worth sitting with. Walsin’s own abbreviation appears 199 times across the library, and the instruction to contact a local representative appears 102 times — more than once per document on average — but not once attached to a place. The documentation routes a reader to a person, never to a location, and an origin statement needs a location.
Is country of origin a column in any of the 203 export files we hold?
No. We opened all 203 export files fresh and pulled every column header into one set: 96 distinct column names, and Series is the only one that appears in all 203. We then searched those 96 names for “origin”, “country”, “plant”, “site”, “made” and “manufact”. Zero matches, on 120 files that return data and 83 that return none.
This is not a defect we are pinning on Walsin. A parametric export describes what a part is — case size, dielectric, resistance, tolerance. Origin is a property of a specific shipment, and a catalogue file was never built to carry it. The mistake happens one step downstream, when a distributor fills the blank anyway. We hold no document stating an origin for any of the 359,135 part numbers in our data, and we will not write one in to look complete.
Which of our 28 documents route a reader to Walsin instead of naming a place?
Twenty of them. We went back through the 102 “local representative” pages and counted how many of the 28 source documents they come from: 20 of 28 carry the phrase at least once. The eight that never use it are the MLCC application guide, the Middle and High Voltage sheet, the Surface Coating Type sheet, the Low Profile TT sheet, both Mega Cap sheets, and — this is the detail we have not seen flagged before — both of our chip resistor datasheets. Neither Walsin_WR_General_Purpose_Chip_Resistor.pdf nor Walsin_MR_Automotive_Thick_Film_Chip_Resistor.pdf tells the reader to contact anyone, and between them those two documents govern a share of our 234,815 chip resistor part numbers. We have not seen this split counted anywhere. Even the routing instruction, the nearest thing to a “where” in our library, is unevenly distributed.
What does a safety-certified part’s paperwork locate, and what does it not?
A certificate number, never a place. We checked four real part numbers against what their governing documents actually state, including the one series where we hold named third-party certificates.
| Part number | Line, governing document | What the sheet states | Match / mismatch vs a United States origin declaration |
|---|---|---|---|
0603B101J500 |
General Purpose, 01_General_Purpose.pdf |
0603, X7R, 100 pF, ±5%, 50 Vdc | Mismatch — full dimensional and electrical data, zero location data |
HH15N0R2A500 |
High Q / Low ESR, 10_High_Q_Low_ESR_HH.pdf |
0402, NP0, 0.2 pF, ±0.05 pF, 50 Vdc | Mismatch — same gap; this series has a public datasheet URL and still no place name |
S252N470K602 |
Safety X1/Y2, 16_Safety_X1Y2_General_S2.pdf |
2211, NP0, 47 pF, 6000 Vdc printed as the impulse rating, not the working voltage | Match on a checkable certificate; mismatch on origin — UL file E182369 and TUV R50381780 / R50195920 sit on this series and none of the three names a country |
MF12Q10R0ATL |
Tantalum nitride thin film resistor | 1206, 10.0 Ω, ±0.05%, ≦±50 ppm/°C, 2/5 W | Mismatch — the most precision-documented resistor in our library still has no origin field |
The S2 row is worth a second look, because it is where our strongest and our weakest documentation sit on the same part. We can hand a buyer a UL file number and two TUV certificate numbers he can check himself in minutes. We cannot hand him a country, and listing the voltage field without the correction would be worse than silence — the 6000 Vdc figure printed on that series is the impulse voltage, not a working rating, and treating one undocumented field carelessly is exactly how a second one gets invented too.
What can we hand a United States buyer today, and what will we not invent?
Four real things, and nothing beyond them. Authorised-channel provenance confirmable with Walsin directly, original sealed Walsin packaging, lot and date-code traceability, and a certificate of conformity per shipment on request. We will not add a fifth line that says where a part was made, because no document we hold supports it.
What would actually resolve this, and has it been asked?
One document: a written origin statement from Walsin, per part number or per shipment, on the manufacturer’s own letterhead. That sits on our request list alongside the other eighteen document types absent from our 451 pages — REACH, SVHC, conflict minerals, PFAS, China RoHS, ISO 9001, IATF 16949, PPAP, IMDS, a qualification report and a Declaration of Conformity among them. We say “on our request list” rather than “we have requested” because nothing has gone to Walsin in writing yet, and that difference is the difference between a status and a promise.
The fastest practical step while that request is open is to cross the whole bill of materials in one pass. Paste up to 500 part numbers or drop your Excel or CSV into the free cross-reference tool. It is matched against Walsin’s published catalogue, decodes 18 manufacturers’ part numbers and returns candidates against 800,000+ crossable Walsin part numbers, stating every difference from your original instead of hiding it. Then check ready stock — a dated snapshot as at 23 September 2026, not a live feed — before committing a build slot. For what authorised supply adds beyond that, see authorised distributor, verified and, for the automotive-grade paperwork gap on the resistor side, MR versus WR, field by field. The capacitor range sits on the Walsin MLCC page.
The short version
We re-measured, not re-quoted. All 451 pages, searched again for 33 origin terms, return zero. All 203 export files, searched again across 96 distinct column names, carry none for origin. Twenty of our 28 documents route a reader to “contact Walsin’s local representative” and the other eight — including both chip resistor datasheets — do not even do that. We can check a UL file number and two TUV certificate numbers for you in minutes. We cannot tell you a country, so we will not. Qualification, and the customs filing, stay with you.
Send us the part numbers you need to clear for a United States entry and we will put a written origin request to Walsin on your behalf, then tell you exactly what comes back — including if it is nothing. If another supplier has already given you a country for a Walsin part, ask them which document it came from. We would like to know whether anyone can answer that.
Frequently asked questions
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Does Venatech state a country of origin for Walsin passive components?
No. We searched all 451 pages of our 28 Walsin datasheets for 33 terms covering countries, cities, plants and the phrase “country of origin.” Every one returns zero pages, and we hold no document stating an origin for any of our 359,135 part numbers, so we state none.
Is country of origin a field in a Walsin parametric export?
No. We opened all 203 export files and collected 96 distinct column names across them. None names origin, country, plant, site or manufacture. Origin describes a shipment, not a catalogue entry, which is why a parts export was never built to carry it.
Which Walsin documents never even mention a local representative?
Eight of our 28, including both chip resistor datasheets — Walsin_WR_General_Purpose_Chip_Resistor.pdf and Walsin_MR_Automotive_Thick_Film_Chip_Resistor.pdf. The other 20 documents carry the phrase “contact Walsin’s local representative” at least once, across 102 of the 451 pages, but never alongside a place name.
What traceability can Venatech actually supply for a United States buyer?
Original sealed Walsin packaging, lot and date-code traceability, a certificate of conformity per shipment on request, and authorised-distributor status confirmable with Walsin directly. On the safety-certified capacitor line we can also give UL file E182369 and TUV certificates R50381780 and R50195920, each checkable in the issuing body’s own public database.
Is the 6000 Vdc figure on a Walsin S2 safety capacitor its working voltage?
No, and this is a separate trap from the origin question. The Rated Voltage field on S2 export rows, including S252N470K602, is the impulse voltage. The real working voltage, stated only in the datasheet, is X1 310 Vac / Y2 250 Vac, 1500 Vdc. We flag this every time the field comes up, because quoting it unread is the same kind of error as guessing an origin.
Will Venatech put a written origin request to Walsin for a specific part number?
Yes, and we will tell you the date we sent it. Nothing has been requested from Walsin in writing yet, which is why we say “on our request list” rather than “requested.” A written statement of origin, from the manufacturer, is the only document that actually settles this.
Where does Venatech ship from, if not from a stated country of origin?
Hong Kong, on every line, with group entities in Shenzhen, Singapore and Jiangmen and Chengdu in preparation. Shipping origin and country of origin are two different facts, and we keep them apart deliberately — one is where our warehouse is, the other is a fact we do not hold.