A Cambodian solar pump controller maker crossing a 2012 impedance filter to Walsin should count names first. Walsin’s SCA, SCM, WQCF and WTCF families list 72 rows, all 2.0 by 1.2 mm, but only 18 distinct electrical rows; 16 of those are sold under four or more part numbers with identical export fields. None is on our 23 September 2026 shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, holds the Walsin Technology (Walsin) inductor parametric export: 5,411 rows, 5,410 real part numbers once a QA test row is removed. This post is for a procurement or design engineer at a Cambodian assembler of solar-powered devices who wants Walsin candidates for a 2012 impedance-rated filter with every difference stated. Every Walsin part number below is real, every count is ours, and the news facts are dated and sourced (fetched 2 November 2026).
What did Cambodia report about fuel costs and solar-powered devices?
Cambodia’s imports of diesel, gasoline and combustion gas reached 2.82 billion US dollars in January to September 2026, up 53.8 percent from 1.84 billion a year earlier, according to Ministry of Commerce data released on 9 October 2026 and reported by Xinhua via Cambodianess. Diesel alone was 1.47 billion, up 48 percent.
Separately, Xinhua reported on 7 October that Prime Minister Hun Manet said the government had subsidised nearly 500 million US dollars to curb fuel and power costs, including electricity tariffs, lower import duties on oil and gas, and tariff cuts on electric vehicles, plug-in hybrids, electric stoves and solar-powered devices. Retail diesel was 5,650 riels a litre, up 46.7 percent on pre-conflict levels. Neither report mentions pumps or components, and we draw no conclusion about any Cambodian company. We have no relationship with Xinhua or Cambodianess.
| Point | What the source says | Source date | Match / mismatch |
|---|---|---|---|
| Fuel import bill | 2.82 billion US dollars, January to September 2026, up 53.8 percent | Cambodianess (Xinhua), 10 October 2026 | Match for context only |
| Subsidies | Nearly 500 million US dollars | Cambodianess (Xinhua), 7 October 2026 | Match for context only |
| Tariff cuts | EVs, plug-in hybrids, electric stoves, solar-powered devices | Cambodianess (Xinhua), 7 October 2026 | Match for context only |
| Pumps or filters | Not mentioned | Both reports | Mismatch with any component claim |
How many Walsin 2012 impedance filter rows are really the same part under several names?
We parsed all 72 rows of the SCA (18), SCM (18), WQCF (18) and WTCF (18) families. All are 2012 size, 1.2 mm thick and plus or minus 20 percent. They collapse to 18 distinct electrical rows: 15 carry four part numbers, one carries eight, one carries three and one carries one. We grouped on impedance at 100 MHz, DC resistance and rated current.
So 16 of 18 electrical rows are sold under four or more names, and the eight-name row, 67 ohm, exists as an FH and an FS suffix in each family. We have not seen this counted anywhere. The same impedance can also sit in two rows: 90 ohm appears at 0.30 ohm and 370 mA, and at 0.35 ohm and 330 mA, and 120 ohm likewise. Impedance alone does not name the part.
| Impedance at 100 MHz | DC resistance, rated current | Names for the one row | Match / mismatch |
|---|---|---|---|
| 120 ohm | 0.30 ohm, 370 mA | SCA2012FS121M, SCM2012FS121M, WQCF2012Z0M121PB, WTCF2012Z0M121PB |
Match on all export fields across four names |
| 120 ohm | 0.35 ohm, 330 mA | SCA2012FH121M, SCM2012FH121M, WQCF2012FHM121PB, WTCF2012FHM121PB |
Match across four names; mismatch with the row above on resistance and current |
| 100 ohm | 0.35 ohm, 330 mA | SCA2012FS101M, SCM2012FS101M, WQCF2012Z0M101PB, WTCF2012Z0M101PB |
Match across four names |
| 750 ohm | 0.90 ohm, 220 mA | SCA2012FS751M, SCM2012FS751M, WQCF2012Z0M751PB |
Match across three names |
| 750 ohm | 0.90 ohm, 240 mA | WTCF2012Z0M751PB |
Mismatch: the WTCF name prints 240 mA where the other three print 220 mA |
Your incumbent part goes in a sixth column on your own copy; we do not name one.
What does the export not tell you about these filters?
The export prints 6 fields per filter and does not name the filter type, and 0 of our 28 datasheets cover an inductor or filter. It gives an impedance in ohms at 100 MHz, a DC resistance and a rated current, but no circuit type, no line count, no working voltage and no insulation rating.
A solar pump controller needs to know whether the part is a single-line bead or a multi-line filter, and the working voltage on the line it protects. The export answers neither, and we hold no datasheet for the SCA, SCM, WQCF or WTCF families. We do not guess. Ask Walsin for the family sheet. The one disagreement we found, 240 mA against 220 mA at 750 ohm, is exactly the kind of difference a datasheet would settle.
Why buyers in Cambodia choose Venatech
Buyers in Cambodia choose Venatech because we are an authorised Walsin Technology distributor working from Hong Kong, we supply small lots, and we show you every mismatch as well as the match. For this one filter group we counted 72 rows down to 18 electrical rows, found the single row where one name disagrees with the other three, and put it in the table. A buyer can then specify the electrical row and the exact name.
The VenaMatch cross-reference tool decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts, with every difference from your original stated. The BOM page takes up to 500 part numbers. We say what we do not hold: we hold neither ISO 9001 nor IATF 16949, and we hold no filter datasheets. Lot and date-code traceability and a certificate of conformity per shipment are available on request. Ask, and we will tell you plainly what we can and cannot supply.
What will we not tell you about Cambodia?
Anything about Cambodian customs, certification, tariffs or incentives. We hold no office, entity or stock in Cambodia; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We state no duty rate, transit time or conformity requirement, give no legal or customs advice, and do not say whether any tariff cut applies to a given product; confirm with your compliance team. We also make no statement about any pump’s performance or fuel savings.
How Venatech helps
Paste the incumbent filter number into the free cross-reference tool, which decodes 18 manufacturers’ part numbers across 800,000+ crossable parts and lists Walsin candidates with match and mismatch fields, or upload the list to the BOM checker, up to 500 part numbers. The Hong Kong ready-stock list is a dated snapshot, 23 September 2026, never live-synced; it holds none of the 72 rows above. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply. We work from Hong Kong, in small lots, and you can request a quote through the site. Worked example from our export: SCA2012FS121M and WQCF2012Z0M121PB agree on 120 ohm, 0.30 ohm and 370 mA. Our post on rated current versus saturation current explains the current fields, multilayer versus wirewound inductors covers the families, and the inductor range lists them. Qualification stays with you.
The short version
Count the names before you count the parts. Walsin’s SCA, SCM, WQCF and WTCF 2012 filter families are 18 electrical rows, not 72, and 16 of them carry four or more part numbers with identical export fields. One row, 750 ohm, disagrees by 20 mA between the WTCF name and the other three. None is on the 23 September 2026 shelf. Confirm against the datasheet and qualify in your own controller.
Send us one filter line from your solar controller bill of materials and we will return the Walsin candidates with every difference stated. Do you specify the row or the name?
Sources
Fetched 2 November 2026. The Cambodia news comes from these pages; the part data, counts and stock position come from our own Walsin exports and stock list.
- Cambodianess (Xinhua), “Cambodia’s Oil, Gas import Costs Jump Nearly 54 pct in First Nine Months”, 10 October 2026: https://www.cambodianess.com/article/cambodias-oil-gas-import-costs-jump-nearly-54-pct-in-first-nine-months
- Cambodianess (Xinhua), “Cambodia subsidises nearly 500 million dollars to curb rising fuel and power costs, PM says”, 7 October 2026: https://www.cambodianess.com/article/cambodia-subsidizes-nearly-500-mln-u%73d-to-curb-rising-fuel-power-costs-pm
Frequently asked questions
What did Cambodia report about fuel imports?
Cambodianess, citing Xinhua and Ministry of Commerce data released on 9 October 2026, reported that imports of diesel, gasoline and combustion gas reached 2.82 billion US dollars in January to September 2026, up 53.8 percent. The report does not mention pumps or components.
How many Walsin 2012 filter rows are duplicates?
Of 72 rows in the SCA, SCM, WQCF and WTCF families, 18 are distinct electrical rows. Fifteen carry four part numbers, one carries eight, one carries three and one carries one, with identical impedance, resistance and current in the export.
Where do the four families disagree?
Only at 750 ohm. The SCA, SCM and WQCF names print 220 milliamps and the WTCF name prints 240 milliamps, with the same 0.90 ohm DC resistance. Everywhere else the names agree on every export field we hold.
Does the export name the filter type?
No. It gives impedance at 100 megahertz, DC resistance and rated current, with no circuit type, line count or working voltage. We hold no datasheet for these families, so ask Walsin before you accept any row for a pump controller.
Are any of these filters on your shelf?
None of the 72 rows is on our 23 September 2026 Hong Kong ready-stock snapshot, which is dated and not live. Check the ready-stock page, or ask us to quote a lot, which we can do in small quantities from Hong Kong.
Do you ship to Cambodia or state its import rules?
We ship from Hong Kong and state no duty, customs, certification or transit information for Cambodia. We hold no office or stock there and give no legal or customs advice; confirm with your compliance team. You can request a quote through the site.