A Budapest RF lab choosing a high-Q MLCC can draw on 5,606 Walsin Technology (Walsin) high-Q and RF part numbers across the HH, RF and UF series. A 0402, 1.0 pF brief returns 30 of them, down to plus or minus 0.02 pF. Venatech Limited, an authorised Walsin distributor in Hong Kong, held 89 on its shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for RF and prototype engineers in Budapest, Hungary, who build matching networks, filters and test fixtures on telecom R&D boards and need a short list of capacitors whose tolerance is stated in fractions of a picofarad. We parsed the Walsin MLCC export 00_ALL_MLCC_parts_combined.xlsx (24,026 rows, 23,601 distinct part numbers) and our ready-stock list as at 23 September 2026. Every part number is real, and the market facts come from one report fetched on 11 November 2026.
What did Ericsson open in Budapest?
A 6G lab at its Budapest R&D centre. According to an Ericsson release republished by TelecomTV on 14 November 2025, Ericsson opened a 6G Lab at its Budapest R&D centre, focused on core network evolution, network exposure and programmability, working with BME, ELTE, Óbuda University and the HUN-REN research network.
The release notes that Ericsson has been in Hungary since 1991 and that its research team there was set up in 1996. The lab’s own focus is the network core, which is software-led; the conclusion we draw is ours: a city with this density of telecom research also runs radio prototypes, test fixtures and student boards, and those use high-Q capacitors at a few picofarads. We have no relationship with Ericsson or the universities named, and say nothing about what they buy.
How many high-Q MLCC does Walsin list for RF work?
5,606 distinct part numbers. We counted the three Walsin RF-grade MLCC series in 00_ALL_MLCC_parts_combined.xlsx: 3,615 Microwave Caps (RF series), 1,706 High Q and Low ESR Caps (HH series) and 285 Ultra Microwave Caps (UF series), all C0G (NP0) dielectric.
By size, 1,496 are 0402, 1,295 are 0603, 1,186 are 0201 and 1,092 are 0805, with 01R5, 0505 and 1111 parts for the smallest and the higher-power positions. Our guide to high-Q, low-ESR MLCC for RF explains when the HH and RF series differ, and our note on crossing Johanson high-Q families to Walsin shows the same 5,606 count from the cross-reference side. The MLCC range lists every family.
Which Walsin 0402, 1.0 pF high-Q MLCC fit a matching-network brief?
Thirty, in three series. We filtered the three series to 0402 and 1.0 pF and found 30 Walsin part numbers: 15 RF, 11 HH and 4 UF, with tolerances from plus or minus 0.02 pF to plus or minus 0.5 pF and ratings from 16 V to 200 V.
The table takes a common brief, 0402, 1.0 pF, plus or minus 0.05 pF or better, 50 V, and shows the closest rows. Your incumbent goes in the last column.
| Walsin part | Series | Tolerance | Rated voltage | Match / mismatch with a 1.0 pF, ±0.05 pF, 50 V brief | Your incumbent |
|---|---|---|---|---|---|
RF15N1R0A500 |
RF | ±0.05 pF | 50 V | Match, on our 23 Sep 2026 shelf | |
HH15N1R0A500 |
HH | ±0.05 pF | 50 V | Match | |
UF15N1R0A500 |
UF | ±0.05 pF | 50 V | Match | |
UF15N1R0P500 |
UF | ±0.02 pF | 50 V | Match, tighter tolerance | |
RF15N1R0Q500 |
RF | ±0.03 pF | 50 V | Match, tighter tolerance | |
RF15N1R0A101 |
RF | ±0.05 pF | 100 V | Match, higher voltage | |
RF15N1R0B500 |
RF | ±0.1 pF | 50 V | Mismatch: tolerance is wider; on our shelf | |
HH15N1R0C500 |
HH | ±0.25 pF | 50 V | Mismatch: tolerance is wider |
The export gives no Q or ESR value at frequency. Take those from Walsin’s datasheet for the exact series before you commit a matching network, and measure on your own fixture.
Why does tolerance in picofarads matter more than percent at 1 pF?
Because 0.25 pF is a quarter of the part. At 1.0 pF, a plus or minus 0.25 pF tolerance is plus or minus 25%, while the plus or minus 0.05 pF rows hold the value to 5% and the plus or minus 0.02 pF UF rows to 2%; we counted 7 rows at plus or minus 0.05 pF, 2 at 0.03 pF and 2 at 0.02 pF among the 30.
In a matching network at a few gigahertz, that spread moves the resonance more than the board stack-up does. So a Budapest prototype that tunes perfectly on one reel can drift on the next if the drawing calls a code letter wider than the bench needed. Write the tolerance in picofarads on the drawing, and cross by letter, not by series name.
Which high-Q MLCC are on the Hong Kong shelf for a Budapest lab?
Eighty-nine lines. We matched the three series against our ready-stock list as at 23 September 2026: 89 Walsin high-Q and RF lines are on the shelf, 66 in the RF series, 22 in HH and 1 in UF, and 32 of them are 0402 parts from 0.1 pF to 82 pF.
| Walsin 0402 part on the shelf | Capacitance | Tolerance | Rated voltage |
|---|---|---|---|
RF15N0R6B500 |
0.6 pF | ±0.1 pF | 50 V |
RF15N0R8A500 |
0.8 pF | ±0.05 pF | 50 V |
RF15N1R2B500 |
1.2 pF | ±0.1 pF | 50 V |
HH15N1R9A500 |
1.9 pF | ±0.05 pF | 50 V |
HH15N2R4A500 |
2.4 pF | ±0.05 pF | 50 V |
RF15N3R0B500 |
3.0 pF | ±0.1 pF | 50 V |
HH15N3R3B250 |
3.3 pF | ±0.1 pF | 25 V |
That is useful for a lab: small lots of tuning values ship from one Hong Kong snapshot. The ready-stock list is dated, not live-synced; for any other value, request a quote and we source it through our authorised Walsin channel. We make no stock or lead-time promise.
How can Venatech help a telecom R&D team in Hungary?
How Venatech helps is simple: paste, compare, quote. Venatech Limited is the authorised Walsin distributor in Hong Kong, and VenaMatch decodes 18 manufacturers’ part numbers and crosses 800,000+ parts to Walsin, with every field marked match or mismatch.
Paste up to 500 part numbers into the cross-reference tool, or load a BOM from your prototype. The ready-stock list is our Hong Kong snapshot dated 23 September 2026. We serve small lots from Hong Kong, answer quotes fast and help with each cross; request a quote through the site. Walsin is the line we are authorised for; Stackpole and Viking are lines we supply.
The short version
Budapest’s telecom research base runs on prototypes, and prototypes run on picofarad capacitors. Walsin covers them with 5,606 high-Q and RF MLCC; a 0402, 1.0 pF brief returns 30 part numbers down to plus or minus 0.02 pF, and 89 lines were on our Hong Kong shelf as at 23 September 2026.
Send us your matching-network values with the tolerance you need in picofarads, and we will return the Walsin rows field by field. Which of your 1 pF positions is specified in percent?
Related reading
- High-Q, low-ESR MLCC for RF
- Crossing Johanson high-Q and RF ceramic families to Walsin
- Passives for a telecom base station front end
- Free cross-reference tool and ready-stock snapshot
Last reviewed 11 Nov 2026.
Sources
Fetched 11 November 2026.
- TelecomTV (Ericsson release), “Ericsson launches a 6G lab in Budapest”, 14 November 2025: https://www.telecomtv.com/content/6g/ericsson-launches-a-6g-lab-in-budapest-54298
Frequently asked questions
What did Ericsson open in Budapest?
An Ericsson release republished by TelecomTV on 14 November 2025 says Ericsson opened a 6G Lab at its Budapest R&D centre, working with BME, ELTE, Óbuda University and HUN-REN on core network evolution. These are the release’s statements.
How many high-Q MLCC does Walsin make?
We counted 5,606 distinct part numbers in Walsin’s RF (3,615), HH (1,706) and UF (285) series, all C0G dielectric, from 01R5 to 1111.
Which Walsin 0402 capacitor matches 1.0 pF, plus or minus 0.05 pF, 50 V?
RF15N1R0A500, HH15N1R0A500 and UF15N1R0A500 match on every export field, and UF15N1R0P500 holds plus or minus 0.02 pF. Take Q and ESR from Walsin’s datasheet.
Does Venatech hold high-Q MLCC in Hong Kong?
As at 23 September 2026 our snapshot held 89 Walsin high-Q and RF lines, 32 of them in 0402, including RF15N1R0A500. For other values, request a quote; we give no lead-time promise.
Should I specify RF capacitor tolerance in picofarads?
Yes, below about 10 pF. At 1.0 pF a plus or minus 0.25 pF code is 25% of the value, so state the tolerance in picofarads and cross by the tolerance letter.
Is Venatech an authorised Walsin distributor for Hungary?
Venatech Limited is an authorised Walsin distributor in Hong Kong and supplies buyers in Hungary in small lots. We give no legal or customs advice; confirm with your compliance team.