Phone Assembly Electronics for Vietnam from Hong Kong: Bac Ninh Exports Reached 23.16 Billion US Dollars in Q1 2026, and Walsin’s 2,544 0201 Capacitors Hold 21 Variants at 100 nF but Only 10 Parts at 1 uF or More, With 1 of 21 on the Shelf

Phone assembly electronics for Vietnam lean on 0201 capacitors, and the Walsin Technology (Walsin) catalogue holds 2,544 of them. At 100 nF there are 21 variants across X5R, X6S and X7S, but only 10 parts reach 1 uF or more, topping out at 2.2 uF, and our Hong Kong shelf holds 1 of the 21.

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Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Venatech upload files for Walsin MLCC (23,360 rows, 23,360 distinct part numbers) and our stock list as at 23 September 2026. It is for a design or sourcing engineer at a Vietnamese phone, module or EMS plant who is picking decoupling capacitors in the smallest case sizes. Every part number is real and every count is ours. The market fact names its source and the day we fetched it, 10 November 2026.

What did Bac Ninh report about its exports, and why does a component buyer care?

It reported the largest export total of any province. According to Bac Ninh Newspaper’s English edition, updated on 18 April 2026, the province’s exports reached 23.16 billion US dollars in the first quarter, up 25.15 percent year on year and ranking first nationwide, against a 2026 target of 110 billion US dollars.

The same article names the Samsung Electronics and Samsung Display factories as significant contributors and says the Yen Phong plant produces new smartphone lines; it does not give a phone share of the total. Those are the newspaper’s figures, not ours. Our reading is ours: phones and modules are built from thousands of 0201 and smaller decoupling capacitors per hour, so case-size coverage is the buying question. We have no relationship with any named company and say nothing about what it buys.

How many Walsin 0201 capacitors exist, and in which dielectrics?

Two thousand five hundred and forty-four, mostly C0G. We counted the 0201 case in the Venatech upload files: 2,544 part numbers, of which 2,039 are C0G/NP0, 296 X7R, 178 X5R, 29 X6S and 2 X7S; 99 of the 2,544 are on our stock list as at 23 September 2026.

The C0G dominance matters for a phone board. Decoupling needs the high-capacitance classes, X5R and X6S, and those total only 207 parts at 0201, about 8 percent of the case size. Our post on case sizes, imperial and metric shows the 0201 and 0603 naming trap, and NP0 versus X7R versus X5R explains the dielectric trade.

How many 0201 variants exist at 100 nF, and which one is on the shelf?

Twenty-one, and one is stocked. We counted the 0201 case at exactly 100 nF: 10 X5R, 9 X6S and 2 X7S part numbers, spread over voltages from 4 V to 25 V and tolerances of plus or minus 5, 10 and 20 percent; only 0201X104K6R3 is on the shelf as at 23 September 2026.

Among the 10 X5R parts, the voltage split is 3 at 6.3 V, 3 at 10 V, 2 at 16 V and 2 at 25 V. A bill of materials that prints only 100 nF, 0201 does not say which of the 21 it means. We have not seen this counted elsewhere. The MLCC range lists the families, and the ready stock list is a dated snapshot, never live-synced.

Which Walsin parts cross a 100 nF, 0201, X5R, 10 V, plus or minus 10 percent brief, and what differs?

One is an exact match and the shelf part is a near miss. Of the 21 variants at 100 nF in 0201, 0201X104K100 is the only one that matches an X5R, 10 V, plus or minus 10 percent brief on every export field.

The reader’s incumbent goes in the last column.

Walsin part	Description	On shelf 23 Sep 2026	Match / mismatch with the brief	Your incumbent
0201X104K100	General Purpose, 0201, X5R, 100 nF, plus or minus 10 percent, 10 V	No	Match on size, dielectric, value, tolerance and voltage
0201X104K6R3	General Purpose, 0201, X5R, 100 nF, plus or minus 10 percent, 6.3 V	Yes	Match on the other fields; mismatch: voltage is 6.3 V, lower
0201X104K160	General Purpose, 0201, X5R, 100 nF, plus or minus 10 percent, 16 V	No	Match on the other fields; mismatch: voltage is 16 V, higher
0201X104M100	General Purpose, 0201, X5R, 100 nF, plus or minus 20 percent, 10 V	No	Mismatch: tolerance is plus or minus 20 percent, wider
0201S104K100	General Purpose, 0201, X6S, 100 nF, plus or minus 10 percent, 10 V	No	Mismatch: dielectric is X6S, not X5R

A match in the table is a match on the export fields, no more. DC bias will cut the usable value below its marking, which our post on MLCC DC bias and voltage derating explains. Confirm against both datasheets and qualify in your own circuit.

How far does the 0201 range go in capacitance, and what about 01005?

Ten parts reach 1 uF in 0201, and none goes past 2.2 uF. In the Venatech upload files, 8 part numbers at 0201 are 1 uF and 2 are 2.2 uF; one of them, 0201X225M6R3 at 2.2 uF and 6.3 V, is on our shelf as at 23 September 2026.

The ultra-small 01R5 series, which is the 01005 case, holds 317 part numbers. 276 are C0G up to 220 pF, 32 are X5R and 9 are X7R; the X5R parts reach 100 nF in 5 part numbers, at 4 V, 6.3 V and 10 V, and none of the 317 is on the shelf. A designer moving a phone module from 0201 to 01005 gives up a factor of twenty in the largest value and every shelf pick.

What will we not tell you about phone assembly?

Anything about your board, your yield or your handset programme. Of the 28 Walsin datasheets we hold, 26 cover MLCC series, but none names a phone or a handset, so every count here is catalogue coverage, not suitability.

We make no claim that any part suits a phone, an RF front end or a placement line. We hold no ISO 9001 or IATF 16949 certificate. We give no legal, customs or conformity advice; confirm with your compliance team. Qualification stays with you.

How can Venatech help a Bac Ninh buyer?

How Venatech helps starts with a free paste box. The cross-reference tool, called VenaMatch, decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts; paste up to 500 part numbers or an Excel or CSV file and each Walsin candidate returns with every field marked match or mismatch. Load a whole BOM for a review. The ready-stock list is a Hong Kong snapshot dated 23 September 2026.

Worked example from our own files: the 100 nF, 0201, X5R, 10 V brief returned 1 exact part among 21 variants at the value, and the shelf part differs on voltage. Venatech Limited is an authorised Walsin Technology distributor in Hong Kong; Stackpole and Viking are lines we supply. We serve from Hong Kong, welcome small lots, and you request a quote through the site.

The short version

For a Vietnamese phone or module plant, 0201 decoupling is a variant question: 21 part numbers at 100 nF, 10 parts at 1 uF or more, a 2.2 uF ceiling, and 1 of the 21 on the shelf. Name the dielectric, voltage and tolerance, not just the value.

Send us one 0201 decoupling line from your BOM, with the dielectric, voltage and tolerance you can accept, and we will return the Walsin parts with every difference stated. If your incumbent prints only 100 nF, do you know which of the 21 variants you are buying?

Sources

Fetched 10 November 2026.

• Bac Ninh Newspaper (English edition), Bac Ninh: exports accelerate, maintain leading position, updated 18 April 2026: https://en.baobacninhtv.vn/bac-ninh-exports-accelerate-maintain-leading-position-postid443645.bbg

Related reading

• Passive component case sizes, imperial and metric
• NP0 versus X7R versus X5R MLCC dielectric
• MLCC DC bias and voltage derating
• Free cross-reference tool (VenaMatch)
• Ready stock, Hong Kong snapshot dated 23 September 2026

Last reviewed 10 Nov 2026.

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Frequently asked questions

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