China Mobile’s chairman said on 6 November 2026 that its 2027 computing procurement will exceed 100 billion yuan. Boards on a 48 V bus usually want a 100V X7R capacitor. Walsin lists 854 of them, but at 0805 the X7R ladder stops at 470 nF, and 1 µF needs a 1206 or larger.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for a hardware or sourcing engineer at a Chinese telecom-equipment, server or power-module maker in Shenzhen, Suzhou, Chengdu or elsewhere. Walsin Technology (Walsin) is the only line we are authorised for. The Walsin side is our own MLCC export, 24,026 rows and 23,601 distinct part numbers, re-measured on 11 November 2026. Every part number below is real and appears in that export.
What did China Mobile say about computing investment on 6 November 2026?
That computing is its fastest-growing spend. According to a report on 10jqka dated 6 November 2026, China Mobile chairman Chen Zhongyue told the 2026 Mobile Network Conference that the group’s 2027 procurement will exceed 500 billion yuan, with computing procurement above 100 billion yuan and terminal procurement and sales above 100 billion yuan.
The same report, which we read on 11 November 2026, says three gigawatt-scale intelligent computing parks started construction this year and two more are planned for next year, for seven in total, all with standardised modular design and high-density liquid cooling. These are China Mobile’s statements as reported, not ours. We have no relationship with China Mobile and say nothing about what it or its suppliers buy.
Why does a 48 V board usually call for a 100V X7R capacitor?
Because of headroom and DC bias. A 48 V nominal bus can run well above 48 V in normal operation and carries transients, so input and bus decoupling on telecom and rack power boards is commonly specified at 100 V; a Class II capacitor such as X7R also loses effective capacitance as DC bias rises.
That is an engineering convention, not a rule, and your own derating policy decides it. The practical result is that the 100 V column of a catalogue matters more to a 48 V designer than the 50 V column, and the largest value available at 100 V in each case size sets how many parts you place. Our post on MLCC DC bias and voltage derating explains why the label value is not the working value.
How far does Walsin’s 100V X7R capacitor ladder reach in each case size?
To 470 nF at 0805 and 2.2 µF at 1206. We counted 854 distinct Walsin X7R part numbers rated 100 V; the largest value is 470 nF in 0805, 2.2 µF in 1206 and 1812, 10 µF in 1210 and 22 µF in 2220, and 82 of the 854 reach 1 µF or more.
| Case size | 100V X7R part numbers | Largest value | Example at the top value | Match / mismatch against a 1 µF, 100 V X7R brief | Your incumbent |
|---|---|---|---|---|---|
| 0603 | 180 | 100 nF | Mismatch on value | ||
| 0805 | 212 | 470 nF | 0805B474K101 |
Mismatch on value | |
| 1206 | 200 | 2.2 µF | 1206B225K101 |
Match; 1 µF and 2.2 µF both listed | |
| 1210 | 103 | 10 µF | SH32B106K101 (soft termination) |
Match; top value is soft termination only | |
| 1812 | 86 | 2.2 µF | Match | ||
| 2220 | 31 | 22 µF | 2220B226K101 |
Match |
Of the 82 part numbers at 1 µF or more, we found only 25 in General Purpose; 26 are big-size parts, 16 are SH soft termination, 6 are MT and 6 are ST automotive, 2 are MG and 1 is low profile. If your board flexes or sees thermal cycling, our post on soft termination MLCC is the place to compare the SH and ST options.
Is there a 1 µF, 100 V part in 0805 at all?
Three rows say so, none of them X7R. We found three 0805, 100 V General Purpose rows at 1,000 nF: 0805A105K101 (X7S), 0805A105M101 (listed as X5R) and 0805A474K101 (listed as X7S, but its value code 474 reads 470 nF while its Capacitance field reads 1,000 nF).
That last row is the finding we have not seen published anywhere. A Walsin value code of 474 means 47 times ten to the fourth picofarads, which is 470 nF, so the code and the field disagree by a factor of about two. The second row is labelled X5R while the other 21 General Purpose parts whose dielectric letter is A in our export all read X7S. We will not tell you which field is right. Treat both rows as unconfirmed until Walsin’s datasheet for the exact part number settles them, and never select either from the export alone.
What does the Hong Kong shelf hold at 100 V?
Thirty-six X7R lines, two of them at 1 µF or more. We read the stock list as at 23 September 2026: 36 of its 1,125 part numbers are Walsin 100V X7R capacitors, and the two at 1 µF or more are both 1210: 1210B105K101 at 1 µF and 1210B225K101 at 2.2 µF.
The largest 0805 on the shelf at 100 V is 0805B474K101, 470 nF, which is also the top of Walsin’s 0805 ladder. The ready stock list is a dated snapshot, never live-synced, and we make no lead-time or availability promise for any part named here.
How can Venatech help a Chinese telecom or computing-hardware team?
How Venatech helps starts with the free cross-reference tool, VenaMatch: it decodes 18 manufacturers’ part numbers, covers 800,000+ crossable parts, and returns each Walsin candidate with every field marked match or mismatch. Paste up to 500 part numbers or an Excel or CSV file, or upload a full BOM for review. Browse the MLCC range.
We are a Hong Kong-based distributor with a location in Shenzhen, and we serve small lots; you request a quote through the site. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Qualification stays with you.
The short version
- China Mobile plans 2027 computing procurement above 100 billion yuan, per a 6 November 2026 report.
- Walsin lists 854 X7R part numbers at 100 V; 82 reach 1 µF or more.
- X7R at 100 V stops at 470 nF in 0805; 1 µF starts at 1206.
- Two 0805 rows at 1 µF carry export conflicts; treat them as unconfirmed.
- 36 100V X7R lines were on our 23 September 2026 shelf, two at 1 µF or more.
Paste your 48 V bus capacitors into the free cross-reference tool and read every field as match or mismatch. Qualification stays with you.
Frequently asked questions
What did China Mobile announce for 2027?
Per a 10jqka report of 6 November 2026, chairman Chen Zhongyue said 2027 procurement will exceed 500 billion yuan, including more than 100 billion yuan for computing. Three gigawatt-scale computing parks began construction this year. These are China Mobile’s statements as reported.
How many Walsin 100V X7R capacitors are there?
We counted 854 distinct X7R part numbers rated 100 V in Walsin’s MLCC export, re-measured on 11 November 2026. 82 of them reach 1 microfarad or more, and the largest is 22 microfarad in 2220.
What is the largest 100V X7R capacitor in 0805?
470 nF, for example 0805B474K101, which was on our shelf as at 23 September 2026. Three 0805, 100 V rows at 1 microfarad exist, but none is X7R and two carry data conflicts in the export.
Is a 1210 100V 2.2uF capacitor available from Walsin?
Yes. 1210B225K101 is 2.2 microfarad, 100 V, X7R, plus or minus 10 percent, and it was on our shelf in the 23 September 2026 snapshot. Check DC bias at your bus voltage on the datasheet.
Why do 48 V designs use 100 V MLCC?
Because the bus runs above 48 V in normal operation, carries transients, and Class II capacitance falls with DC bias. Your derating policy decides the rating; 100 V is a common choice, not a rule.
Does Venatech have an office in China?
Venatech is a Hong Kong-based distributor with a location in Shenzhen, authorised for Walsin. We give no price, lead-time or stock guarantee and no legal or customs advice; confirm import requirements with your compliance team.
Related reading
- MLCC DC bias and voltage derating
- Soft termination MLCC: SH, SG, ST and VT
- How to read a Walsin MLCC part number
- Free cross-reference tool and ready stock
Last reviewed 11 Nov 2026. Sources: 10jqka report of China Mobile chairman’s remarks at the 2026 Mobile Network Conference, 6 November 2026 (news.10jqka.com.cn, fetched 11 Nov 2026); Venatech Walsin MLCC export and stock list as at 23 September 2026, re-measured 11 Nov 2026.