For a German motor-drive shunt, Walsin Technology (Walsin) lists 83 current sense part numbers whose power rating implies 30 A or more. Sixty-six are 2512, 12 are 1206, 3 are 1225 and 2 are 0612. Every 1206 among them is 1 milliohm, and a 2512 takes four times the board area.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for a design or sourcing engineer at a German maker of drives, inverters or automation who is sizing a phase-current shunt. It uses the Walsin chip resistor export, re-measured on 10 November 2026 (234,815 rows, 234,401 distinct part numbers), and our stock list dated 23 September 2026. Every part number is real and every count is ours.
What did ZVEI report for the German electrical industry in 2026?
It reported modest production growth and stronger orders. ZVEI’s fact sheet of June 2026 said new orders rose 6.5 percent year on year in January to April 2026, sales rose 4.2 percent, and real output rose 0.1 percent; the association put 2025 turnover at about 225.1 billion euros.
Those are ZVEI’s figures, from the fact sheet we read on 10 November 2026. It gives no separate figure for drives, so we draw no conclusion about drive demand. The engineering point stands independently: a drive has a shunt in each phase leg or in the DC link, and the footprint it takes competes with gate drivers and copper.
How many Walsin current sense parts imply 30 A or more, and at which case sizes?
Eighty-three, mostly 2512. We parsed the 11,616 current sense and power sensing part numbers in the Walsin export and computed the current implied by rated power over resistance: 83 reach 30 A, 31 reach 40 A and 17 reach 50 A.
At 30 A or more the split by case size is 66 at 2512, 12 at 1206, 3 at 1225 and 2 at 0612. We have not seen this counted by footprint anywhere. The implied current is arithmetic from the power rating, not a datasheet current rating, and it ignores layout and derating. The Walsin chip resistor datasheets we hold do not cover these series, so request the datasheet for your exact part number.
| Case size | Nominal footprint | Parts implying 30 A or more | Board area against 1206 |
|---|---|---|---|
| 1206 (3216) | 3.2 by 1.6 mm | 12 | 1.0 times |
| 0612 (1632) | 1.6 by 3.2 mm | 2 | 1.0 times, wide terminal |
| 1225 (3263) | 3.2 by 6.3 mm | 3 | about 3.9 times |
| 2512 (6432) | 6.4 by 3.2 mm | 66 | 4.0 times |
Which 1206 parts reach 30 A, and what do they have in common?
They are all 1 milliohm at 1 W. We found 12 part numbers in 1206 that imply 30 A or more, every one at 1 milliohm and 1 W, implying 31.6 A: 6 at plus or minus 1 percent and 6 at plus or minus 5 percent, across metal plate commercial and automotive series.
TCR on these 12 is 70, 75 or 100 ppm. No 1206 part implies 30 A at any other value. If your drive needs 50 A, the 1206 does not get there; the smallest parts that do are one 1225 and 16 at 2512. Our post on chip resistor power rating by case size explains why power rating, not current, is what the catalogue publishes.
Which Walsin parts cross a 1 milliohm, 1 percent, 75 ppm drive shunt brief?
Two match. The brief is 1 milliohm, plus or minus 1 percent, 75 ppm or better, at least 30 A implied, in 1206 or smaller: WW12RR001FTL (70 ppm) and WW12NR001FTL (75 ppm) both meet every field.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
WW12RR001FTL |
Metal plate power, 1206, 1 milliohm, plus or minus 1 percent, 70 ppm, 1 W | No | Match on every field; implies 31.6 A | |
WW12NR001FTL |
Metal plate, 1206, 1 milliohm, plus or minus 1 percent, 75 ppm, 1 W | No | Match on every field; implies 31.6 A | |
WW12YR001FTL |
Metal foil, 0612, 1 milliohm, plus or minus 1 percent, 100 ppm, 1 W | No | Mismatch: TCR is 100 ppm; footprint is a different land pattern | |
WW12RR001FTLV |
Metal plate power, 1206, 1 milliohm, plus or minus 1 percent, 100 ppm, automotive series | No | Mismatch: TCR is 100 ppm | |
WW25NR001FTL |
Metal plate power, 2512, 1 milliohm, plus or minus 1 percent, 70 ppm, 2 W | No | Mismatch: 2512 takes four times the area; implies 44.7 A | |
WW25BR001FTL |
Metal plate, 2512, 1 milliohm, plus or minus 1 percent, 70 ppm, 3 W | No | Mismatch: 2512; implies 54.8 A |
A match is a match on export fields only. See low-ohm current sense, thick film against metal for the family split.
What is on the Hong Kong shelf?
None of the 83. Of the 11,616 current sense part numbers, 3 are on our stock list dated 23 September 2026, all thick film at 0805 between 0.27 and 0.47 ohm, so 0 of the 83 parts implying 30 A or more is stocked.
The list holds 1,125 distinct codes, 254 of them chip resistors. It is a snapshot, never live. The Walsin chip resistor range lists the families, and a to-order enquiry goes through the site with no promise on timing.
What do we hold on Stackpole for motor drives?
No Stackpole data. Stackpole is a line Venatech supplies; Walsin is the only line we are authorised for. We tried stackpole.com on 10 November 2026 and every requested page redirected to the johnsonelectric.com homepage, which held no product data, so this post cites no Stackpole specification.
We hold no Stackpole export or datasheet. Send your incumbent shunt’s part number and datasheet and we will read it against the Walsin fields, stating each difference. We state nothing on Stackpole availability. Confirm against both datasheets and qualify in your own circuit.
How can Venatech help a German drive designer?
How Venatech helps starts with the free cross-reference tool (VenaMatch): it decodes 18 manufacturers’ part numbers across 800,000+ crossable parts, takes up to 500 part numbers or an Excel or CSV file, and marks each field match or mismatch. Paste a drive BOM to check every sense line. The ready-stock list is a Hong Kong snapshot dated 23 September 2026.
We serve from Hong Kong in small lots, and you request a quote through the site. We hold no office or stock in Germany. We give no legal or customs advice, so confirm with your compliance team.
The short version
For a German drive shunt, footprint decides: 83 Walsin current sense parts imply 30 A or more, 66 of them in 2512 and only 12 in 1206, all at 1 milliohm. None is on the shelf. Name the current, the value and the footprint together.
Send us one shunt line from your drive BOM with the value, tolerance, TCR and footprint limit, and we will return the Walsin parts with every difference stated. If your board has room only for a 1206, is 1 milliohm a value your amplifier can live with?
Related reading
- Low-ohm current sense: thick film against metal
- Chip resistor power rating by case size
- Anti-surge chip resistors
- Free cross-reference tool and the dated ready-stock list
Last reviewed 10 Nov 2026.
Sources
Fetched 10 November 2026.
- ZVEI, Fact Sheet June 2026, German electrical and digital industry: https://www.zvei.org/fileadmin/user_upload/Presse_und_Medien/Publikationen/Regelmaessige_Publikationen/Daten_Zahlen_und_Fakten/Die_deutsche_Elektroindustrie_Daten_Zahlen_Fakten/Fact-Sheet-June-2026.pdf
- Venatech Walsin chip resistor export, re-measured 10 November 2026; Venatech stock list, as at 23 September 2026.
Frequently asked questions
What did ZVEI report on German electrical industry orders in 2026?
ZVEI’s fact sheet of June 2026 said new orders rose 6.5 percent year on year in January to April 2026 and sales rose 4.2 percent. These are the association’s figures, not ours, and they do not break out drives.
How many Walsin current sense resistors imply 30 A or more?
83 of 11,616 part numbers, from rated power over resistance: 66 in 2512, 12 in 1206, 3 in 1225 and 2 in 0612. The figure is arithmetic, not a datasheet current rating.
Is there a 1206 Walsin shunt for 50 A?
Not in the export we parsed. The 1206 parts reach 31.6 A, all at 1 milliohm and 1 W. Parts implying 50 A or more are 16 in 2512 and 1 in 1225.
Is WW12RR001FTL a drop-in match for a 1 milliohm, 1206 shunt?
It matches 1 milliohm, plus or minus 1 percent and 70 ppm in 1206, and implies 31.6 A from 1 W. Check pads, derating and the datasheet, and qualify in your own circuit.
Does Venatech hold Stackpole current sense data?
No. Stackpole is a line we supply and Walsin is the only line we are authorised for. We hold no Stackpole export or datasheet, and stackpole.com redirected to the johnsonelectric.com homepage on 10 November 2026.
Are these shunts on the Hong Kong shelf?
No. As at 23 September 2026 none of the 83 is on our stock list. The snapshot is dated, not live, so ask through the site for a to-order enquiry.