Wafer fab tool electronics for Singapore often need a bulk capacitor on a 24 V rail, and Walsin Technology (Walsin) lists 68 X7R parts at 10 uF, of which only 24 are rated 35 V or more. The smallest case at 35 V is 1206, nothing is smaller at 50 V than 1210, and none of the 24 is on our shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Walsin MLCC export (24,026 rows, 23,601 distinct part numbers) and our stock list as at 23 September 2026 (1,125 distinct part numbers). It is for a design or sourcing engineer at a Singapore maker of semiconductor equipment, fab automation or industrial power supplies who is crossing a bulk ceramic capacitor. Every part number is real and every count is ours, re-measured on 10 November 2026. The market statement names its source and the day we fetched it.
What did Micron announce for its Singapore NAND fab, and why does a component buyer care?
It announced a ten-year, 24 billion US dollar fab. According to Evertiq on 27 January 2026, Micron broke ground on a NAND wafer fab inside its existing Singapore complex, with about 24 billion US dollars of investment over ten years, up to 700,000 square feet of cleanroom, wafer output starting in the second half of 2028 and about 3,000 new jobs including its high-bandwidth memory packaging facility.
Those are the report’s figures, not ours, and Micron says capacity ramps will follow market demand. The conclusion we draw is ours: a fab is built and serviced with tools, transport automation and power supplies, and local equipment makers and integrators buy the capacitors on those boards. We have no relationship with Micron or any Singapore equipment maker, and we say nothing about what any of them buys.
How many Walsin 10 uF X7R capacitors exist, and how many are rated 35 V or more?
Sixty-eight, and fewer than half reach 35 V. We parsed all 24,026 rows and found 68 distinct X7R part numbers at 10 uF, of which 24 are rated 35 V or more: 3 in 1206, 11 in 1210, 1 in 1812, 8 in 2220 and 1 in 2225.
A 25 V part on a 24 V rail leaves almost no margin by rating alone, so the useful rungs are 35 V, 50 V and 100 V. That is our engineering reading, not a Walsin statement, and DC bias will cut the real capacitance further. Our post on MLCC DC bias and voltage derating explains how. We have not seen this counted anywhere.
Which Walsin parts cross a 10 uF, X7R, 35 V, plus or minus 10 percent, 1206 brief, and what differs?
Two match, and one is a different construction. For a 10 uF, X7R, 35 V, plus or minus 10 percent, 1206 brief, 1206B106K350 and SH31B106K350 match every export field, the latter in a soft-termination series; the 1210 parts and the shelf part differ.
The reader’s incumbent goes in the last column.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
1206B106K350 |
General Purpose, 1206, X7R, 10 uF, plus or minus 10%, 35 V, 1.60 +0.30/-0.10 mm | No | Match on size, dielectric, value, tolerance and voltage | |
SH31B106K350 |
Soft Termination SH series, 1206, X7R, 10 uF, plus or minus 10%, 35 V, 1.60 plus or minus 0.50 mm | No | Match on the electrical fields; mismatch: soft-termination construction | |
1210B106K350 |
General Purpose, 1210, X7R, 10 uF, plus or minus 10%, 35 V, 2.50 plus or minus 0.30 mm | No | Match on the electrical fields; mismatch: 1210 case and a taller body | |
1210B106K500 |
General Purpose, 1210, X7R, 10 uF, plus or minus 10%, 50 V, 2.50 plus or minus 0.20 mm | No | Mismatch: 1210 case; 50 V is a higher rating | |
1210B106K250 |
General Purpose, 1210, X7R, 10 uF, plus or minus 10%, 25 V | Yes | Mismatch: 25 V and 1210; the nearest shelf part |
A match in the table is a match on the export fields, no more. Confirm against both datasheets and qualify in your own circuit. Our post on soft termination MLCC covers when the SH construction matters, for example on a board that flexes.
Where does 10 uF X7R stop getting smaller as voltage rises?
At 1206 for 35 V and at 1210 for 50 V. Across the 68 parts, 10 uF X7R reaches 0805 at 6.3 to 16 V, 1206 at up to 35 V, and 1210 or larger at 50 V and 100 V; no 0805 part is rated above 16 V.
So moving a 24 V bulk capacitor from 1210 to 1206 costs voltage headroom only if you also cross to 35 V, and moving to 0805 is not possible in this export at all. The same file lists 10 uF X5R at 50 V in 0805 (2 parts) and 1206 (2 parts), which is a different dielectric with a different temperature behaviour; that is a design decision, not a swap we recommend. A buyer who moves a footprint without reading this table can find the next size up is the only size.
What does the Hong Kong shelf hold in 10 uF X7R?
Three part numbers, none at 35 V or more. Of the 68 parts at 10 uF X7R, our stock list as at 23 September 2026 holds 3: 0805B106K100 (10 V), 1210B106K160 (16 V) and 1210B106K250 (25 V), all plus or minus 10 percent.
The 25 V part appears twice in the export with two thickness variants, which is why a row count says 4 and a part-number count says 3. A 35 V or 50 V bulk capacitor is therefore a to-order enquiry from us today. That is a fact about our shelf, not about Walsin’s availability, and we make no lead-time promise. The ready stock list is a dated snapshot, never live-synced, and the MLCC range lists the families.
What will we not tell you about wafer fab equipment?
Anything about your tool, your cleanroom qualification or your customer’s specification. Of the 28 Walsin datasheets we hold, 26 cover MLCC series, and none names a semiconductor tool or a cleanroom product, so every count here is catalogue coverage, not suitability.
We make no claim that any part suits a tool power supply, a motion controller or a transport vehicle, or that a 24 V rail needs a 35 V part. We hold no ISO 9001 or IATF 16949 certificate. Our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation, but the shelf in this post is the Hong Kong snapshot only. We give no legal, customs or conformity advice; confirm with your compliance team. Qualification stays with you.
How can Venatech help a Singapore equipment or automation 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 every Walsin candidate returns with each 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 export: the 10 uF, X7R, 35 V, plus or minus 10 percent, 1206 brief returned 2 parts that match, none stocked, and the nearest shelf part is a 25 V 1210. 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 Singapore equipment designer, a 10 uF X7R at 35 V or more is a shortlist of 24 out of 68, the smallest case is 1206 at 35 V and 1210 at 50 V, and the shelf stops at 25 V. State the voltage, case and thickness before you freeze a footprint.
Send us one bulk capacitor line from your BOM, with the voltage, case size and height you can accept, and we will return the Walsin parts with every difference stated. If your rail is 24 V, how much voltage margin does your design review require?
Sources
Fetched 10 November 2026.
- Evertiq, “Micron breaks ground on 24 billion US dollar wafer fab expansion in Singapore”, 27 January 2026: https://evertiq.com/design/2026-01-27-micron-breaks-ground-on-24b-wafer-fab-expansion-in-singapore
- Walsin MLCC export 00_ALL_MLCC_parts_combined.xlsx and Venatech ready-stock workbook as at 23 September 2026, re-measured 10 November 2026 (internal files).
Related reading
- MLCC DC bias and voltage derating
- Soft termination MLCC: SH, SG, ST and VT
- How to cross-reference an MLCC, field by field
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
What did Micron announce for its Singapore fab?
According to Evertiq on 27 January 2026, a NAND wafer fab with about 24 billion US dollars of investment over ten years, up to 700,000 square feet of cleanroom and wafer output from the second half of 2028. These are the report’s figures, not ours.
How many Walsin 10 uF X7R capacitors are rated 35 V or more?
24 of 68 distinct part numbers: 3 in 1206, 11 in 1210, 1 in 1812, 8 in 2220 and 1 in 2225. Confirm each against its datasheet before design-in.
What is the smallest Walsin 10 uF X7R at 35 V?
1206, with three part numbers: 1206B106K350, 1206B106M350 and SH31B106K350. At 50 V the smallest case in the export is 1210.
Which Walsin parts cross a 10 uF, X7R, 35 V, plus or minus 10 percent, 1206 brief?
1206B106K350 and SH31B106K350 match the electrical fields; the SH part is a soft-termination construction. Neither is on our shelf. Confirm against both datasheets and qualify in your own circuit.
Which Walsin 10 uF X7R parts are on the Hong Kong shelf?
Three, as at 23 September 2026: 0805B106K100, 1210B106K160 and 1210B106K250, rated 10, 16 and 25 V. The snapshot is dated, not live, so ask us through the site.
Do you hold stock or an office in Singapore?
Our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, but the shelf figures in this post are the Hong Kong snapshot only. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Confirm with your compliance team.