Servo drive components for China hinge on the current-sense shunt, and the Walsin Technology (Walsin) catalogue lists 11,760 low-ohm current-sense chip resistors. Only 319 reach 5 mOhm or below, 274 of them metal plate, and our Hong Kong shelf holds just 3 low-ohm parts, all 0805 thick film at 0.27 to 0.47 ohm.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Venatech upload files for Walsin chip resistors (234,378 rows, 234,378 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 a Chinese servo-drive, inverter or motion-control maker who is crossing a milliohm shunt. Every part number is real and every count is ours. The market facts name their sources and the day we fetched them, 10 November 2026.
What did Suzhou report about its industrial output, and where do servo drives fit?
It reported a very large manufacturing base still growing. According to an Ecns report dated 27 July 2026 and relayed by Ground News, Suzhou’s industrial enterprises above designated size produced gross output of 2.50 trillion yuan in the first half of 2026, up 6.9 percent on a year earlier, per the city statistics bureau.
That report does not break out servo drives or robots, and we do not claim it does. For a local product page, a Suzhou drive maker states on its own site, dated 1 January 2026, that its range includes the SD900 series of universal servo drives, alongside AC drives and PLCs. We have no relationship with that company or any other, and say nothing about what it buys. Our reading is ours: every servo axis measures motor phase current, and the shunt is a milliohm chip resistor.
How many Walsin low-ohm current-sense chip resistors exist, and in which technologies?
Eleven thousand seven hundred and sixty, mostly thick film. We counted every Walsin chip resistor whose series name contains Low Ohm in the Venatech upload files: 10,572 thick film, 866 metal plate and 322 metal foil, 11,760 in all.
The split matters more than the total. Thick film is the cheap-to-make choice at tenths of an ohm, while metal plate and metal foil carry the very low values. Our post on low-ohm current-sense thick film versus metal explains the physics, and chip resistor power rating by case size shows why a 2512 body carries 3 W where a 0805 carries a quarter watt.
How low does each technology go, and how many parts reach 5 mOhm?
Thick film stops at 5 mOhm, and only two parts get there. Of the 11,760 parts, 672 are 10 mOhm or below, split 544 metal plate, 94 metal foil and 34 thick film; at 5 mOhm or below there are 319, split 274 metal plate, 43 metal foil and 2 thick film.
The lowest value in the metal plate and metal foil lists is 0.5 mOhm, ten times lower than any thick film part. A 5 mOhm shunt in a drive is therefore overwhelmingly a metal-element decision. At exactly 5 mOhm we count 78 part numbers: 62 metal plate, 14 metal foil and 2 thick film. Nobody should assume a thick film family covers a milliohm brief because its name says Low Ohm.
Which Walsin parts cross a 5 mOhm, 2512, 3 W, plus or minus 1 percent shunt, and what differs?
Three match on the electrical fields and three do not. For a 5 mOhm, 2512, 3 W, plus or minus 1 percent, 70 ppm per degree brief, WW25AR005FTL, WW25BR005FTL and WW25AR005FTLJ match every export field we hold; the foil, the 1206 and the shelf part differ.
The reader’s incumbent goes in the last column.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
WW25AR005FTL |
Metal Plate Power Low Ohm, 2512, 5 mOhm, plus or minus 1 percent, 3 W, up to 70 ppm | No | Match on size, value, tolerance, power and TCR | |
WW25BR005FTL |
Metal Plate Low Ohm, 2512, 5 mOhm, plus or minus 1 percent, 3 W, up to 70 ppm | No | Match on the electrical fields; series name differs | |
WW25AR005FTLJ |
Metal Plate Low Ohm (Automotive), 2512, 5 mOhm, plus or minus 1 percent, 3 W | No | Match on the electrical fields; mismatch: listed in the Automotive series, ask for the qualification report | |
WW25DR005FTL |
Metal Foil Low Ohm Power Sensing, 2512, 5 mOhm, plus or minus 1 percent, 2 W, up to 100 ppm | No | Mismatch: 2 W and 100 ppm, foil technology | |
WW12KR005FTL |
Metal Plate Power Low Ohm, 1206, 5 mOhm, plus or minus 1 percent, 1 W | No | Mismatch: 1206 body and 1 W | |
WW08WR270FTL |
Thick Film Low Ohm, 0805, 270 mOhm, plus or minus 1 percent, 1/4 W | Yes | Mismatch: 54 times the resistance; the nearest shelf part is a different brief |
A match in the table is a match on the export fields, no more. Confirm against both datasheets and qualify in your own circuit. The anti-surge chip resistors post covers the pulse question separately.
What does the Hong Kong shelf hold in low-ohm current-sense resistors?
Three part numbers, none below 270 mOhm. Of the 11,760 low-ohm parts, our stock list as at 23 September 2026 holds 3: WW08WR270FTL, WW08WR390FTL and WW08WR470FTL, all 0805 thick film, plus or minus 1 percent, 0.27, 0.39 and 0.47 ohm.
So every milliohm shunt, in any technology, is a to-order enquiry from us today. That is a fact about our shelf, not about Walsin’s availability, and we make no lead-time promise. The ready stock list is a dated snapshot, never live-synced, and the chip resistor range lists the families. Ask us through the site for a to-order quote.
What will we not tell you about servo drives?
Anything about your drive, your loop bandwidth or your safety approval. Of the 28 Walsin datasheets we hold, 2 cover chip resistors and neither is a low-ohm current-sense family, so every spec in this post comes from the export columns, not a datasheet.
We make no claim that any part suits a servo axis, a pulse profile or a self-heating limit. The export gives resistance, tolerance, TCR and rated power, nothing on pulse energy. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice; confirm with your compliance team. Qualification stays with you.
How can Venatech help a Suzhou drive designer?
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 files: the 5 mOhm, 2512, 3 W brief returned 3 parts that match the electrical fields among 78 at the value, none 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 a Chinese servo-drive designer, a milliohm shunt is a technology question: 11,760 low-ohm parts, 319 at 5 mOhm or below, 274 of them metal plate, and a shelf with 3 parts that start at 270 mOhm. Name the value, body size, power and TCR, not the family name.
Send us one shunt line from your BOM, with the resistance, body size, power and TCR you can accept, and we will return the Walsin parts with every difference stated. If your incumbent is a 5 mOhm 2512, do you know whether it is plate, foil or thick film?
Sources
Fetched 10 November 2026.
- Ecns via Ground News, Suzhou’s above-designated-size industrial output exceeds 2.50 trillion yuan in H1, 27 July 2026: https://ground.news/article/suzhous-above-designated-size-industrial-output-exceeds-25-trillion-yuan-in-h1
- Suzhou Veichi Electric, company news page on 2025 progress and 2026 plans, 1 January 2026: https://www.veichi.com/news/veichi-steady-progress-in-2025-chasing-dreams-in-2026.html
Related reading
- Low-ohm current-sense: thick film versus metal
- Chip resistor power rating by case size
- Anti-surge chip resistors
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
How much industrial output did Suzhou report for the first half of 2026?
An Ecns report dated 27 July 2026 said industrial enterprises above designated size produced 2.50 trillion yuan, up 6.9 percent year on year. It is relayed through an aggregator, so check it against the statistics bureau.
How many Walsin low-ohm current-sense chip resistors are there?
11,760 distinct part numbers in the Venatech upload files: 10,572 thick film, 866 metal plate and 322 metal foil. Confirm each against its datasheet before design-in.
How many Walsin low-ohm parts reach 5 mOhm or below?
319: 274 metal plate, 43 metal foil and 2 thick film. At exactly 5 mOhm there are 78 part numbers. The lowest value in the lists is 0.5 mOhm, and only metal types reach it.
Which Walsin 5 mOhm 2512 parts match a 3 W, plus or minus 1 percent brief?
WW25AR005FTL, WW25BR005FTL and WW25AR005FTLJ match on size, value, tolerance, power and TCR in the export. The J part sits in the Automotive series, so request its qualification report. Qualify in your own circuit.
Does the Hong Kong shelf hold any milliohm current-sense resistors?
No. As at 23 September 2026 the shelf holds 3 low-ohm parts, all 0805 thick film at 0.27, 0.39 and 0.47 ohm. Milliohm values are to-order enquiries. The snapshot is dated, not live.
Do you hold stock or an office in Suzhou?
No. Our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Confirm with your compliance team.