An authorised distributor holds a written agreement with the component manufacturer to
buy and resell its parts, so every reel arrives in factory packaging with its lot and date
code intact. You verify one by asking for the manufacturer’s written confirmation, asking
which legal entity signed it, checking the manufacturer’s own distributor list, and
requesting a Certificate of Conformity.
What does “authorised distributor” actually mean?
It means a signed agreement with the manufacturer to buy and resell its components. Stock
moves factory to distributor to you, in the manufacturer’s own packaging. The manufacturer
can confirm the relationship exists, and can hold the distributor to its terms. Without an
agreement there is no authorisation, however much of the brand appears on a website.
The word that matters is agreement, not stock. Anyone can hold Walsin Technology
(Walsin) parts. Anyone can build a website listing Walsin part numbers. What separates an
authorised distributor is a contractual line back to the factory, which is also the only
thing that makes the lot and date code on a reel mean anything.
Three roles get confused. A manufacturer makes the part. An authorised distributor buys it
from that manufacturer under agreement. A broker or independent buys wherever stock can be
found, including from other buyers’ excess. All three are legitimate businesses. Only the
first two can tell you, from their own records, which factory lot a reel came from.
How do I verify that a distributor is authorised?
Four checks, in this order. Ask the distributor for the manufacturer’s written confirmation
of authorisation. Ask which legal entity that confirmation names. Cross-check the entity
against the manufacturer’s own published distributor list. Then ask for a Certificate of
Conformity against a specific part number. If any of the four stalls, that is your answer.
None of the four requires you to trust the distributor’s own description of itself. They are
all answerable by a third party — the manufacturer — or by a document the distributor either
has or does not have.
| Check | What to ask for | A clean answer looks like | A weak answer looks like |
|---|---|---|---|
| 1. Written confirmation | A letter or email from the manufacturer naming the distributor | Manufacturer letterhead, a named signatory, a dated period of validity | A logo pasted on the distributor’s own PDF |
| 2. Signing entity | The exact registered name on the agreement | A registered company name and jurisdiction you can search | A group or trading name only |
| 3. Manufacturer’s list | The manufacturer’s published distributor page | The same registered name appears | A similar name in a different country |
| 4. Certificate of Conformity | A CoC against one real part number you intend to buy | Part number, lot or date code, quantity, manufacturer named | “We can supply that later” |
Do this once per manufacturer, not once per distributor. Authorisation is granted brand by
brand. A distributor authorised for one manufacturer is not thereby authorised for another,
and a line card that mixes the two without saying which is which is the single most common
place this gets blurred.
Which legal entity holds the agreement, and why does that matter?
Because the agreement belongs to a registered company, not to a brand name or a group. The
entity that signed is the entity the manufacturer will confirm, the entity that appears on
its distributor list, and the entity that invoices you. If those four names are not the same,
ask why before you place the order.
Groups in this industry commonly operate several entities across Hong Kong, mainland China
and Southeast Asia for tax, currency and logistics reasons. That is normal. What is not
normal is an agreement held by one entity and an invoice issued by another with no
explanation of the relationship. Ask for it in writing.
Why does a real part number sometimes fail on the manufacturer’s own website?
Because manufacturer search tools and manufacturer order codes are not the same string.
Packaging suffixes, embedded spaces and export quirks mean a genuine, orderable part number
can return zero results on the brand’s own site. A failed copy-paste is a data formatting
problem far more often than it is a counterfeit signal.
This is worth knowing before you use “it isn’t on the manufacturer’s website” as a
verification test, because it fails on real parts. Venatech Limited, an authorised Walsin
distributor in Hong Kong, holds a stock snapshot dated 23 September 2026 covering 1,125
distinct part numbers, and a separate extract of Walsin’s own parametric exports. The two
disagree on formatting in three different ways.
| Order code we would quote | Same part in Walsin’s parametric export | Copy-paste resolves? | Match / mismatch |
|---|---|---|---|
0201B101K160CT |
0201B101K160 |
No | Mismatch — export omits the CT packaging suffix |
HH03N0R4B500CT |
HH03N0R4B500 |
No | Mismatch — same suffix omission |
S242B102K502CT |
S242B102K502 |
No | Mismatch — same suffix omission |
WR04X101JTL |
WR04X101 JTL |
No | Mismatch — export carries an embedded space |
WA04X300JTL |
WA04X300 JTL |
No | Mismatch — embedded space |
WR02X1002FAL |
WR02X1002FAL |
Yes | Match — identical string |
MF12E1R00FTL |
MF12E1R00FTL |
Yes | Match — identical string |
WR12X0000FTL |
no row returned | No | Mismatch — absent from the export entirely |
Unique to Venatech’s data. Of the 254 chip resistor part numbers in the 23 September
2026 snapshot, 183 appear in Walsin’s chip resistor export exactly as we would quote
them, 66 appear only once an embedded space is stripped out, and 5 do not appear at all.
On the capacitor side, 762 of 864 MLCC lines resolve against Walsin’s MLCC export and
102 do not. Every one of those 102 is a part we hold. The count comes from matching our
own snapshot against Walsin’s own exports, and is not published anywhere.
The practical rule: verify the relationship with the manufacturer, and verify the part
against the datasheet. Do not verify the part against a search box. See
Why Walsin part numbers do not paste into your BOM
for the full structure of the formatting problem.
What documents should an authorised distributor hand over without argument?
Four, and none of them should take a week. The manufacturer’s datasheet for the exact part.
A Certificate of Conformity naming the part, the lot or date code and the quantity. A
statement of what is in the packaging and whether it is unopened. And the registered entity
details behind the quotation.
A distributor that hesitates on the datasheet is not reading the part number carefully. A
distributor that hesitates on the CoC may be sourcing the line somewhere it would rather not
describe. The CoC is the cheapest question you can ask and the most revealing.
| Document | What it proves | What it does not prove |
|---|---|---|
| Manufacturer datasheet | The specification the part should meet | That this reel is that part |
| Certificate of Conformity | The supplier is stating, on the record, which lot shipped | That the part will pass your own qualification |
| Packaging statement | Whether the reel is factory-sealed or repacked | Anything about parts already removed |
| Registered entity details | Who you are actually contracting with | That they hold the manufacturer’s agreement |
Is Venatech Limited an authorised distributor, and how do I check?
Venatech Limited (威納電子有限公司) was established in Hong Kong in 2011 and is an authorised
distributor for Walsin Technology (Walsin), alongside KAMAYA, INPAQ, STACKPOLE (SEI),
VIKING, TA-I and GOODWORK. Run the same four checks on us. Ask for the written
confirmation, ask which entity signed, check the manufacturer’s list, and ask for a CoC
against a part you intend to buy.
Our position on sourcing is narrow and stated plainly: authorised distribution only,
original manufacturer packaging, full lot and date code traceability, and a Certificate of
Conformity available on request. The check is not whether we say those things. The check is
whether the documents arrive when you ask for them.
What does authorisation not guarantee?
It does not guarantee the part suits your circuit, that the datasheet limits cover your
conditions, or that a reel will never have a problem. Authorisation controls the channel the
part travelled down. It does not replace qualification, incoming inspection, or reading the
derating curve. Those remain yours.
It also does not guarantee a part is currently in production. Series get revised, and
parametric search tools drift out of step with what a factory will actually accept an order
for — which is exactly why the 102 unresolved MLCC lines above are flagged rather than sold
on the strength of a snapshot.
FAQ
What is the difference between an authorised distributor and a broker?
An authorised distributor buys from the manufacturer under a written agreement and can trace a reel back to a factory lot from its own records. A broker or independent sources stock wherever it can be found, including from other buyers’ excess. Both are legitimate. Only the first has a contractual line to the factory.
How can I check if a distributor is authorised for a specific brand?
Ask for the manufacturer’s written confirmation, note the exact registered entity it names, and cross-check that entity against the manufacturer’s own published distributor list. Authorisation is granted brand by brand, so repeat the check for each manufacturer on the line card rather than accepting the line card as a whole.
Does an authorised distributor always have the manufacturer’s certificate on its website?
No, and its absence proves nothing either way. Many manufacturers issue confirmation letters with a validity period and do not permit them to be published. The reliable test is whether the distributor will send you the current letter on request and whether the entity it names appears on the manufacturer’s own list.
Why does a genuine part number return no results on the manufacturer’s website?
Because order codes and search strings differ. Packaging suffixes and embedded spaces break a copy-paste. In Venatech’s 23 September 2026 snapshot, 66 of 254 chip resistor lines match Walsin’s export only after an embedded space is removed, and 865 of 1,125 order codes carry a CT suffix the MLCC export omits.
What should I ask for before placing a first order with a new distributor?
The manufacturer’s datasheet for the exact part, a Certificate of Conformity naming the part and its lot or date code, a statement of whether the packaging is factory-sealed, and the registered entity details behind the quotation. All four are routine requests. How quickly they arrive tells you most of what you need.
Is a distributor authorised for one brand authorised for all the brands it lists?
No. Each authorisation is a separate agreement with a separate manufacturer. A line card can legitimately mix authorised lines with lines a distributor simply trades, and the difference is rarely marked. Ask, brand by brand, which relationship applies to the part you are buying.
Does buying from an authorised distributor remove the need for incoming inspection?
No. Authorised sourcing controls which channel the part travelled down. It does not verify that the part suits your circuit, that your operating conditions sit inside the datasheet limits, or that a specific reel is free of handling damage. Qualification and incoming inspection remain your responsibility.
Next step
Run the four checks on us before you run them on anyone else. Send a part number and
Venatech Limited, an authorised Walsin distributor in Hong Kong, will return the Walsin
datasheet, the orderable order code including its packaging suffix, whether the line carries
a recorded date code in the current snapshot, and a Certificate of Conformity on request.
Ask Venatech to verify a part · Browse the
Walsin MLCC range · Read
The CT suffix: orderable Walsin part numbers
and
Walsin passive components in Hong Kong stock.
Cross it yourself. The cross-reference tool takes a single part number or a whole BOM column and returns the Walsin candidates with every field that differs stated plainly — qualification stays with you. Ready stock shows what is held in Hong Kong today, with an RFQ against any line.