Power electronics components for India include a 1 uF, 25 V capacitor beside many gate drivers; Walsin Technology (Walsin) lists 44, 12 of them in 0603. A 1 uF, X7R, 0603, 25 V, plus or minus 10 percent brief returns 3 parts, and our shelf holds 5 of the 44, 1 an exact 0603 match.
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 an Indian maker of drives, chargers, inverters or industrial controllers who is crossing a 1 uF decoupling or bootstrap 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 DeshGujarat report on the Surat chip-packaging plant, and why does a component buyer care?
It reported the start of commercial production at a packaging plant. According to DeshGujarat on 18 September 2026, Suchi Semicon began commercial production at an 868 crore rupee assembly, packaging and test plant at Palsana, Surat, inaugurated on 17 September 2026, with a stated annual capacity of about 1.03 billion chips in SOIC, QFN and advanced packages.
The report adds that the plant was cleared by the Union Cabinet in May 2026 under the India Semiconductor Mission, that it works with Japan’s ROHM Semiconductor on technology, and that it targets power electronics, analogue ICs, automotive and EVs, and industrial automation. Those are the report’s statements, not ours. The conclusion we draw is ours: packaged power and driver ICs are surrounded on the board by small ceramic capacitors, and the case size and voltage decide which ones a designer can buy. We have no relationship with Suchi Semicon, ROHM or any Indian maker, and we say nothing about what any of them buys.
How many Walsin 1 uF, 25 V capacitors exist, and at which case sizes?
Forty-four, and they cluster in two sizes. We parsed all 24,026 MLCC rows and found 44 distinct part numbers at 1 uF and 25 V: 4 in 0402, 12 in 0603, 12 in 0805, 8 in 1206, 4 in 1210, 3 in 1812 and 1 in 2220.
Capacitance in the export is written as 1uF on some rows and 1000nF on others, so a text search for one misses the other; we normalised both before counting. We have not seen this counted anywhere. Our post on MLCC DC bias and voltage derating explains why a 25 V rating on a 1 uF part does not mean 1 uF at 25 V of working voltage.
Which Walsin parts cross a 1 uF, X7R, 0603, 25 V, plus or minus 10 percent brief, and what differs?
Three match, and two of them carry a caveat. Of the 12 parts at 1 uF, 25 V and 0603, 6 are X7R; with plus or minus 10 percent that leaves 3, 0603B105K250 in General Purpose, SH18B105K250 in soft termination and MG18B105K250 in the Automotive Without AEC-Q200 series.
The reader’s incumbent goes in the last column.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
0603B105K250 |
General Purpose, 0603, X7R, 1 uF, plus or minus 10%, 25 V, 0.80 +0.15/-0.10 mm | Yes | Match on size, dielectric, value, tolerance and voltage | |
SH18B105K250 |
Soft Termination SH series, 0603, X7R, 1 uF, plus or minus 10%, 25 V, 0.80 plus or minus 0.30 mm | No | Match on the electrical fields; mismatch: soft-termination construction and a looser thickness | |
MG18B105K250 |
Automotive Without AEC-Q200 (MG series), 0603, X7R, 1 uF, 25 V | No | Match on the electrical fields; the export’s tolerance field reads -0.1, not plus or minus 10 percent, so confirm it | |
0603B105J250 |
General Purpose, 0603, X7R, 1 uF, plus or minus 5%, 25 V | No | Mismatch: tolerance is plus or minus 5 percent, tighter | |
0603X105K250 |
General Purpose, 0603, X5R, 1 uF, plus or minus 10%, 25 V | Yes | Mismatch: X5R, not X7R |
The other X5R row, 0603X105Z250, carries a minus 20 to plus 80 percent tolerance, so an X5R search at plus or minus 10 percent misses it by design. 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 how to cross-reference an MLCC shows the field-by-field method.
Why can the same 0805 part number appear twice in the export?
Because the export lists thickness variants as separate rows. We found 0805B105K250 and 0805X105K250 each twice in the export, once at a 1.25 mm thickness of plus or minus 0.20 mm and once at plus or minus 0.10 mm.
That is why 7 shelf rows at 1 uF and 25 V collapse to 5 distinct part numbers. A count of rows overstates the choice by 2 here, and a BOM that locks a thickness of plus or minus 0.10 mm cannot be answered by the part number alone. Ask which thickness variant arrives. The same duplicate pattern is a reason we count distinct part numbers throughout, never rows.
What does the Hong Kong shelf hold at 1 uF and 25 V?
Five part numbers across three sizes. Of the 44 parts at 1 uF and 25 V, our stock list as at 23 September 2026 holds 5: 0603B105K250 and 0603X105K250 in 0603, 0805B105K250 and 0805X105K250 in 0805, and 1206B105K250 in 1206, all plus or minus 10 percent.
Only 0603B105K250 matches the brief above exactly. If your board allows 0805, the X7R part is on the shelf as well. The ready stock list is a dated snapshot, never live-synced, and the MLCC range lists the families. If your value is not stocked, ask for a to-order enquiry through the site.
What will we not tell you about power electronics?
Anything about your gate-driver, your bootstrap circuit or your approval. Of the 28 Walsin datasheets we hold, 26 cover MLCC series, and none names a gate driver or a packaged power IC, so every count here is catalogue coverage, not suitability.
We make no claim that any part suits a bootstrap or decoupling role, that 25 V is the right rating for your rail, or that a 1 uF X7R keeps 1 uF under bias. We hold no ISO 9001 or IATF 16949 certificate. We hold no office, entity or stock in India; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We give no legal, customs or conformity advice; confirm with your compliance team. Qualification stays with you.
How can Venatech help an Indian power electronics 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 1 uF, X7R, 0603, 25 V, plus or minus 10 percent brief returned 3 parts, 1 stocked. 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 an Indian power electronics designer, a 1 uF, 25 V capacitor in 0603 is a shortlist: 12 parts, 6 X7R and 6 X5R, 3 that match an X7R, plus or minus 10 percent brief and 1 on our shelf. Name the dielectric, tolerance and thickness, not only the value.
Send us one decoupling line from your BOM, with the dielectric, voltage, size and thickness you can accept, and we will return the Walsin parts with every difference stated. If your incumbent prints only 1 uF 25 V, do you know which dielectric you are buying?
Sources
Fetched 10 November 2026.
- DeshGujarat, “Suchi Semicon begins commercial production at its Surat OSAT plant”, 18 September 2026: https://deshgujarat.com/2026/09/18/suchi-semicon-begins-commercial-production-at-%e2%82%b9868-crore-surat-osat-plant/
- 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
- How to cross-reference an MLCC, field by field
- Tolerance, TCR and dielectric codes decoded
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
What did DeshGujarat report about the Suchi Semicon plant?
On 18 September 2026 it reported commercial production at an 868 crore rupee plant at Palsana, Surat, with a stated capacity of about 1.03 billion chips a year in SOIC, QFN and advanced packages. These are the report’s figures, not ours.
How many Walsin 1 uF, 25 V capacitors are there in 0603?
12 distinct part numbers: 6 X7R and 6 X5R, in General Purpose, Soft Termination SH and Automotive Without AEC-Q200 series. Confirm each against its datasheet before design-in.
Which Walsin parts cross a 1 uF, X7R, 0603, 25 V, plus or minus 10 percent brief?
0603B105K250, SH18B105K250 and MG18B105K250 match the electrical fields; the SH part is soft termination and the MG part’s tolerance field reads -0.1. Only 0603B105K250 is on our shelf. Qualify in your own circuit.
Why does a search for 1 uF miss some Walsin parts?
The export writes the value as 1uF on some rows and 1000nF on others. Search both spellings, or paste the part number into the cross-reference tool.
Which 1 uF, 25 V Walsin parts are on the Hong Kong shelf?
Five, as at 23 September 2026: 0603B105K250, 0603X105K250, 0805B105K250, 0805X105K250 and 1206B105K250. The snapshot is dated, not live, so ask us through the site.
Do you hold stock or an office in India?
No. We hold no office, entity or stock in India; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Confirm with your compliance team.