Robot drive electronics for South Korea need pulse-tolerant chip resistors found by family, and a text search misses 3,030 of Walsin Technology (Walsin)’s 17,180 surge-resistor part numbers because their series name reads ‘Thick Flim’. IFR figures, reported 8 April 2026, give South Korea 1,220 robots per 10,000 employees.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for a Korean servo-drive or robot-controller design engineer crossing a surge or pulse-rated chip resistor. The market statement is sourced and dated. The counts come from the Walsin chip-resistor export files (234,815 rows, 234,401 distinct part numbers) and our ready-stock snapshot as at 23 September 2026. Every part number is real, including those with a space.
What does IFR report about robot density in South Korea?
An industrial-press report on the IFR World Robotics 2025 data, dated 8 April 2026, puts South Korea at 1,220 industrial robots per 10,000 employees, the highest among the countries it names, ahead of Singapore at 818.
The same article lists Germany at 449, Japan at 446 and China at 166. These are the report’s figures, not ours, and we have not read the IFR publication itself. A dense robot floor means many servo and drive boards, but we know nothing of which Korean companies build them or what any of them buys.
How many surge-rated chip resistors does Walsin list, and in which families?
We parsed every Walsin chip-resistor export file and found 17,180 distinct surge-family part numbers in three series: Anti-Surge (8,340), Triple Power Surge, Automotive (5,810) and a series spelled ‘Thick Flim Power Surge Chip Resistor (Automotive)’ (3,030).
The misspelled series holds 3,030 parts in 0603 and 0805, none on the shelf. Every other resistor series in the export spells ‘Film’ correctly. A filter on ‘Thick Film’ returns 224,450 part numbers and none of these 3,030. We have not seen this counted anywhere. The cross-reference tool matches fields, not series spelling. Background is in our post on anti-surge chip resistors.
Which Walsin parts answer a 220 ohm, 1206, 5 percent surge brief?
11 Walsin surge-family part numbers sit at 220 ohm in 1206, and only one matches a 5 percent, 100 ppm brief on every export field, WK12S221 JTL.
The others differ in power (1/4 W against 1/3 W), in an Automotive suffix, in tolerance or in family. Put your incumbent in the last column.
| Walsin part | Family, size, resistance, tolerance, TCR, power | On shelf 23 Sep 2026 | Match / mismatch with a 220 ohm, 1206, plus or minus 5 percent, 100 ppm surge brief | Your incumbent |
|---|---|---|---|---|
WK12S221 JTL |
Anti-Surge, 1206(3216), 220Ω, plus or minus 5%, TCR up to 100 ppm, 1/3W | No | Match on every export field | |
WF12S221 JTL |
Anti-Surge, 1206(3216), 220Ω, plus or minus 5%, TCR up to 100 ppm, 1/4W | No | Match on the electrical fields; mismatch in power: 1/4 W against 1/3 W | |
WK12S221 JTLJ |
Anti-Surge, 1206(3216), 220Ω, plus or minus 5%, TCR up to 100 ppm, 1/3W | No | Match on the electrical fields; mismatch in series suffix: J, Automotive | |
WK12S221 KTL |
Anti-Surge, 1206(3216), 220Ω, plus or minus 10%, TCR up to 100 ppm, 1/3W | No | Mismatch: tolerance is plus or minus 10 percent, wider | |
MF12E221 JTL |
Triple Power Surge (Automotive), 1206(3216), 220Ω, plus or minus 5%, TCR up to 200 ppm, 3/4W | No | Match on size, value and tolerance; mismatch in family (Triple Power Surge, Automotive), TCR up to 200 ppm and 3/4 W | |
MF12E2200FTL |
Triple Power Surge (Automotive), 1206(3216), 220Ω, plus or minus 1%, TCR up to 100 ppm, 3/4W | Yes | Mismatch: tolerance is plus or minus 1 percent, tighter, and the family is Triple Power Surge; on the shelf |
A match here is a match on export fields only. Confirm against both datasheets and qualify in your own circuit. Power ratings change with case size, as our note on chip resistor power rating by case size explains.
Which surge-family Walsin resistors are on the Hong Kong shelf?
4 of 17,180 surge-family part numbers appear in the stock snapshot as at 23 September 2026: MF12E1R00FTL, MF12E2200FTL, MF12E3300FTL, MF12E3902FTL. All four are Triple Power Surge, Automotive, 1206, 3/4 W, plus or minus 1 percent, at 1, 220, 330 and 39,000 ohm.
The ready stock list is a dated snapshot, never live-synced, and we state no lead time or quantity. Of the 9,225 surge-family part numbers with an embedded space, none is on the shelf. Keep the space as printed when you paste a BOM. The chip resistor range lists the families.
What will we not tell you about Korean robot and drive design?
We will not tell you the surge energy your drive sees, the pulse rating a part survives, or which family suits your circuit. The export gives size, power, tolerance and TCR, but no pulse or surge-energy column, and we hold only two resistor datasheets, neither for a surge family.
We hold no ISO 9001 or IATF 16949 certificate and claim no office, entity or stock in South Korea; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We give no legal, customs or conformity advice. Confirm with your compliance team. Qualification stays with you.
How can Venatech help a Korean drive-board team?
How Venatech helps starts with a free paste box. Our VenaMatch tool at /cross-reference/ decodes 18 manufacturers’ part numbers, covers 800,000+ crossable parts, takes up to 500 part numbers or an Excel or CSV file, and marks every field match or mismatch. Upload a board list at /bom/ and read the ready stock snapshot dated 23 September 2026.
Worked example from our own export: a 220 ohm, 1206, 5 percent surge brief returns 11 variants across the families, 1 exact on the export fields, none on the shelf, and the one 220 ohm shelf part is a 1 percent Triple Power Surge part. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply. We work from Hong Kong, welcome small lots, and you request a quote through the site. We give no legal, customs or conformity advice; confirm with your compliance team, and qualification stays with you.
The short version
IFR data reported on 8 April 2026 gives South Korea 1,220 robots per 10,000 employees. In the Walsin export, the surge-resistor families are 17,180 part numbers, 3,030 of them under the misspelling ‘Thick Flim’, and 4 are on our shelf.
Send us one surge-rated resistor line from your servo-drive board, with the size, tolerance and TCR you accept, and we will return the Walsin parts with every difference stated. Does your family filter spell Film the way the export does?
Sources (fetched 10 November 2026)
- Industrial Production Worldwide, World Robotics 2025 report: South Korea, Singapore and Germany have the highest robot density, 8 April 2026: https://www.industrial-production-worldwide.com/news/world-robotics-2025-report-reveals-south-korea-singapore-and-germany-have-highest-robot-density
- Walsin chip-resistor export files (.xlsx, Walsin_ChipR_Product_Data) and Venatech ready-stock workbook as at 23 September 2026, re-measured 10 November 2026 (internal files).
Related reading
- Anti-surge chip resistors
- Chip resistor power rating by case size
- Why Walsin part numbers do not paste into your BOM
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
How many robots per 10,000 employees does South Korea have?
A report on IFR World Robotics 2025 data, dated 8 April 2026, gives 1,220, the highest it names, ahead of Singapore at 818, Germany at 449, Japan at 446 and China at 166.
How many Walsin surge-rated chip resistors are listed?
17,180 distinct part numbers in three series: Anti-Surge (8,340), Triple Power Surge, Automotive (5,810) and the series spelled Thick Flim (3,030).
Why does a Thick Film search miss some Walsin surge resistors?
Because the export spells the series ‘Thick Flim Power Surge Chip Resistor (Automotive)’ on 3,030 part numbers. Search by size, value and tolerance, or paste the incumbent into the cross-reference tool.
Which Walsin surge resistors are on the Hong Kong shelf?
4 of 17,180 in the snapshot dated 23 September 2026, all 1206 Triple Power Surge, Automotive, 3/4 W, plus or minus 1 percent. The snapshot is not live-synced and carries no lead-time promise.
Does Venatech have an office or stock in South Korea?
No. Our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We serve Korean buyers from Hong Kong, in small lots, with a quote requested through the site.
Can Venatech state the surge energy of these resistors?
No. The export has no pulse or surge-energy column and we hold no surge-family datasheet. Confirm against the manufacturer datasheet and qualify in your own circuit.