For marine electronics in Poland, a soft termination MLCC is easy to specify and easy to forget. Walsin lists 1,671 soft-termination part numbers in three series. A 1 µF, 50 V, X7R, 1206 brief returns 10 Walsin parts, 2 with soft termination, and neither soft part is on our shelf; the 2 shelf parts are plain.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for a design or sourcing engineer at a shipbuilding, marine or offshore electronics maker in Gdańsk or elsewhere in Pomerania. Walsin Technology (Walsin) is the manufacturer and the only line we are authorised for. We re-measured every count on 11 November 2026 from Walsin’s MLCC export, 00_ALL_MLCC_parts_combined.xlsx (24,026 rows, 23,601 distinct part numbers), and from our stock list as at 23 September 2026. Every part number below is real.
What did Poland at Sea report about ferry building in Gdańsk, and why does a capacitor buyer care?
Large ferries are still being built in Gdańsk. According to Poland at Sea on 23 October 2026, citing SHIPPAX, 28 large Ro-Pax ferries over 10,000 GT were under construction in mid-2026, and only two of them were in Europe: the Bursztyn Unity at Remontowa in Gdańsk, and one in Italy. The other 26 were in China.
The same report says more than 90 percent of the Bursztyn Unity’s equipment comes from European suppliers, and that the ship carries more than 800 km of cable. Those are the report’s figures, not ours. The inference is ours: a hull that flexes, vibrates and runs that much cable is full of control, power and monitoring boards, and a ceramic capacitor on a flexing board is the classic place for a flex crack. That is the job soft termination exists to do. We have no relationship with Remontowa or any yard and say nothing about what anyone buys.
Which Walsin parts cross a 1 µF, 50 V, X7R, 1206 brief, and which carry soft termination?
Ten parts match the four electrical fields. We filtered all 23,601 distinct MLCC part numbers for 1206, X7R, 1 µF and 50 V and found 10, in five series: 3 General Purpose, 3 AEC-Q200 MT, 2 MG, 1 SH (Ag-polymer soft termination) and 1 SG (Cu-polymer soft termination). The 2 on our shelf are both General Purpose.
The last column is for your incumbent part.
| Walsin part | Series | Tolerance | Thickness in the export (mm) | On shelf 23 Sep 2026 | Match / mismatch with a soft-termination brief | Your incumbent |
|---|---|---|---|---|---|---|
SH31B105K500 |
SH, Ag-polymer soft termination | ±10% | 1.60 ±0.50 | No | Match on all four fields and on soft termination | |
SG31B105K500 |
SG, Cu-polymer soft termination | ±10% | 1.60 ±0.50 | No | Match on all four fields; mismatch in polymer type (Cu, not Ag) | |
1206B105K500 |
General Purpose | ±10% | 1.60 +0.30/-0.10 | Yes | Mismatch: no soft termination | |
1206B105J500 |
General Purpose | ±5% | 1.60 +0.30/-0.10 | Yes | Mismatch: no soft termination; tolerance ±5% | |
MT31B105K500 |
AEC-Q200 MT | ±10% | 1.60 +0.30/-0.10 | No | Mismatch: no soft termination; automotive grade | |
MG31B105K500 |
MG, automotive without AEC-Q200 | column reads -0.1 | 1.60 +0.30/-0.10 | No | Mismatch: no soft termination; tolerance column not a tolerance |
The thickness column is the quiet difference. The soft-termination parts carry a ±0.50 mm thickness tolerance in the export, against +0.30/-0.10 mm on the plain parts, so a soft part can sit up to 0.50 mm taller or shorter than the plain part it replaces. Check your stencil, clearance and pick-and-place height against Walsin’s own datasheet. The MG tolerance column holding “-0.1” instead of a tolerance is a known defect of that export, which we have published before.
How many of the MLCC lines on our shelf have a soft termination MLCC twin?
About a third. We matched the 734 plain (non-soft-termination) MLCC part numbers on our stock list as at 23 September 2026 against the 1,671 soft-termination parts on size, dielectric, capacitance and rated voltage: 265 have at least one soft-termination twin in Walsin’s catalogue, and 469 have none.
By case size, the 265 split as 78 in 0603, 72 in 0805, 48 in 1206, 42 in 0402, 12 in 1210, 11 in 1812, 1 in 1808 and 1 in 2220. We have not seen this count published anywhere. It answers a practical question: if a board already uses one of our shelf lines, can the same value move to soft termination without a redesign? For 265 lines the catalogue says yes on those four fields; for 469 it says no. The twin is a catalogue part, not a shelf part, so ask us for it by exact part number.
Separately, 30 soft-termination part numbers are on the shelf themselves, all in the SH series, including SH31B475K500 (1206, 4.7 µF, 50 V) and SH32B335K500 (1210, 3.3 µF, 50 V). The ready stock list is a dated snapshot, never live-synced.
How far does Walsin soft termination reach at 50 V?
Further in the larger cases. We took the highest X7R capacitance at 50 V across the three soft-termination series by case size: 10 nF in 0402, 1 µF in 0603, 1 µF in 0805, 4.7 µF in 1206, 10 µF in 1210, 1 µF in 1812 and 22 µF in 2220.
The 1812 figure is lower than 1210 at the same voltage, so a larger case is not a safe guess. Of the 1,671 soft-termination parts, 1,488 are SH (Ag-polymer), 65 are SG (Cu-polymer) and 118 are ST, the AEC-Q200 automotive soft-termination series. Our post on soft termination MLCC: SH, SG, ST and VT explains the series. Class II capacitance also falls with applied DC voltage; our post on MLCC DC bias and voltage derating covers how to allow for it.
What will we not tell you about marine electronics?
Whether a part suits your vessel. Of the 28 Walsin datasheets we hold, none names a marine, offshore or classification-society approval, so every count here is catalogue coverage, not suitability for a ship.
Soft termination reduces the risk of flex cracking; it does not remove it, and it is no substitute for board layout, depaneling and mounting practice. We hold no ISO 9001 or IATF 16949 certificate. We hold no office, entity or stock in Poland; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We give no legal, customs or classification advice; confirm with your compliance team. Qualification stays with you.
How can Venatech help a Polish marine electronics maker?
How Venatech helps starts with a free paste box. The cross-reference tool, 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 comes back with every field marked match or mismatch, with a special-requirement filter for soft termination. Load a whole BOM for a review, and see the MLCC range.
Our worked example: the 1 µF, 50 V, X7R, 1206 brief returned 10 parts, 2 with soft termination, 2 on the shelf. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply. We serve from Hong Kong in small lots, and you request a quote through the site.
The short version
- Walsin lists 1,671 soft-termination MLCC part numbers: 1,488 SH, 65 SG and 118 ST.
- A 1 µF, 50 V, X7R, 1206 brief returns 10 parts, 2 with soft termination; the 2 shelf parts are plain.
- 265 of the 734 plain MLCC lines on our shelf have a soft-termination twin in the catalogue.
- Soft parts carry a wider thickness tolerance in the export: check your clearances.
Paste your MLCC lines into the free cross-reference tool, tick soft termination, and see every field marked match or mismatch. Qualification stays with you.
Frequently asked questions
What did Poland at Sea report about Ro-Pax ferries in 2026?
Citing SHIPPAX, it reported on 23 October 2026 that 28 large Ro-Pax ferries were under construction in mid-2026, two of them in Europe, one being the Bursztyn Unity in Gdańsk. These are the report’s figures, not ours.
How many soft termination MLCC part numbers does Walsin list?
1,671 in our export: 1,488 in the SH series, 65 in the SG series and 118 in the AEC-Q200 ST series. We counted distinct part numbers in the Walsin MLCC export on 11 November 2026.
Which Walsin soft termination MLCC crosses a 1 µF, 50 V, X7R, 1206 brief?
SH31B105K500 matches every field with Ag-polymer soft termination; SG31B105K500 matches with Cu-polymer. Neither is on our shelf. Confirm against both datasheets and qualify in your own circuit.
Can I swap a plain MLCC for a soft termination part without changing the board?
Often on the electrical fields, but check height. The soft parts in our 1206 example carry a thickness tolerance of plus or minus 0.50 mm against plus 0.30 or minus 0.10 mm on the plain parts. Confirm with Walsin’s datasheet.
Do you hold soft termination MLCC on the shelf in Hong Kong?
Thirty SH part numbers, on our stock list as at 23 September 2026, including SH31B475K500 and SH32B335K500. The list is a dated snapshot, so ask us through the site for current availability.
Do you hold stock or an office in Poland?
No. We hold no office, entity or stock in Poland; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or classification advice.
Related reading
- Soft termination MLCC: SH, SG, ST and VT
- MLCC DC bias and voltage derating
- The ready-stock MLCC shelf by case size and series
- Free cross-reference tool and ready stock
Last reviewed 11 Nov 2026. Sources: Poland at Sea, “DG GROW Director-General visits Remontowa. European ferries at stake”, 23 October 2026 (https://www.polandatsea.com/dg-grow-director-general-visits-remontowa-european-ferries-at-stake/, fetched 11 Nov 2026); Walsin MLCC export and Venatech stock list as at 23 September 2026, re-measured 11 Nov 2026.