For an anti-surge chip resistor in Polish EV and charger electronics, Walsin Technology (Walsin) lists 17,180 anti-surge part numbers, 8,840 of them in automotive series. In 1206 alone there are 2,411, and 830 of those are rated 3/4 W. Venatech Limited, an authorised Walsin distributor in Hong Kong, crosses and supplies them.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for power electronics and sourcing engineers in Silesia who are designing or second-sourcing the input, pre-charge and snubber stages of EV chargers, on-board chargers and battery electronics. We parsed the five Walsin anti-surge files (Thick_Film_Anti_Surge_Chip_Resistor_0_5.xlsx through Thick_Film_Anti_Surge_Chip_Resistor_20.xlsx) and our ready-stock list as at 23 September 2026. Every part number below is real. The market facts come from one news report we fetched on 11 November 2026.
What is Poland planning for EV production in Silesia?
An EV hub in Jaworzno. According to a Xinhua analysis carried by The Star on 25 September 2026, Poland is planning an electric vehicle hub in Jaworzno, Silesia, that would combine production, supplier development and research, a goal discussed at the New Mobility Congress 2026 in Katowice.
The same report puts Poland’s battery-electric share of new-car registrations at about 5.1% in the first eight months of 2026, against an EU share of 21.7% cited from ACEA. Those are the report’s figures, not ours. The conclusion we draw is ours: a hub built around a local supplier base means more Silesian boards that take mains or high-voltage pulses at power-up, and each of those boards needs resistors that survive them. We have no relationship with any party named in the report.
How many anti-surge chip resistors does Walsin list?
17,180 distinct part numbers. We counted 17,180 distinct anti-surge chip resistors across the five Walsin anti-surge .xlsx files: 8,340 in the standard Anti-Surge series, 5,810 in the Triple Power Surge (Automotive) series and 3,030 in the Power Surge (Automotive) series, from 0402 to 2512.
The automotive share is 8,840 parts, which matters to a Polish supplier selling into a vehicle programme. The standard series covers 0603 to 2512; the Triple Power Surge series runs 830 values in each of seven sizes from 0402 to 2512. Our guide to anti-surge chip resistors explains the construction, and the chip resistor range lists every family.
Which Walsin anti-surge chip resistors cross a 1206, 10 ohm brief?
Eleven part numbers, in three families. We filtered the anti-surge files to 1206 and 10 ohm and found 11 Walsin part numbers: six WK12S rows at 1/3 W, three WF12S rows at 1/4 W and two MF12E automotive rows at 3/4 W, one at 5% and one at 1%.
Put your incumbent part in the last column and compare field by field.
| Walsin part | Series | Tolerance | TCR (ppm/°C) | Rated power | Match / mismatch with a 1206, 10 ohm, 5%, 1/4 W brief | Your incumbent |
|---|---|---|---|---|---|---|
MF12E100 JTL |
Triple Power Surge (Automotive) | 5% | ±200 | 3/4 W | Match, three times the power | |
MF12E10R0FTL |
Triple Power Surge (Automotive) | 1% | ±200 | 3/4 W | Match, tighter tolerance | |
WK12S100 JTL |
Anti-Surge | 5% | ±100 | 1/3 W | Match, higher power | |
WK12S100 JTLJ |
Anti-Surge | 5% | ±100 | 1/3 W | Match, J-suffix variant | |
WF12S100 JTL |
Anti-Surge | 5% | ±100 | 1/4 W | Match on every field | |
WK12S100 KTL |
Anti-Surge | 10% | ±100 | 1/3 W | Mismatch: tolerance is wider | |
WF12S100 MTL |
Anti-Surge | 20% | ±100 | 1/4 W | Mismatch: tolerance is wider |
A match here is a match on export fields only. Pulse energy, the number of pulses and the surge waveform are in Walsin’s datasheet, not in the export, so confirm them for your own test pulse before release.
Why does a 1206 anti-surge chip resistor carry 3/4 W?
Because the MF12E body is built for power and pulses. We checked rated power across all 9,831 Walsin general-purpose 1206 chip resistors: 9,691 list 1/4 W and 140 list 1/2 W. All 830 MF12E Triple Power Surge parts list 3/4 W in the same 3.2 by 1.6 mm footprint.
For a Silesian charger board that is a design lever, not a curiosity. Moving a pre-charge or bleeder resistor from a general-purpose 1206 to an MF12E row can triple the rated power without a footprint change, which avoids a re-layout to 2010 or 2512. Our anti-surge versus general-purpose comparison sets the two families side by side. Derate for your own ambient temperature using the datasheet curve.
Which Walsin anti-surge lines are on the Hong Kong shelf?
Four MF12E automotive lines. We matched the anti-surge files against our ready-stock list as at 23 September 2026 and found four Walsin MF12E 1206 Triple Power Surge (Automotive) lines on the shelf: MF12E1R00FTL (1 ohm), MF12E2200FTL (220 ohm), MF12E3300FTL (330 ohm) and MF12E3902FTL (39 kilohm), all 1% and 3/4 W.
| Walsin part on the shelf | Value | Tolerance | Rated power | Typical role on an EV or charger board |
|---|---|---|---|---|
MF12E1R00FTL |
1 ohm | 1% | 3/4 W | Gate or series damping |
MF12E2200FTL |
220 ohm | 1% | 3/4 W | Pre-charge or discharge path |
MF12E3300FTL |
330 ohm | 1% | 3/4 W | Snubber or pre-charge path |
MF12E3902FTL |
39 kilohm | 1% | 3/4 W | Bleeder or sense divider |
The ready-stock list is a dated Hong Kong snapshot, not live-synced, and quantities change. For any other value, request a quote; we source it through our authorised Walsin channel. We give no lead-time or stock promise.
Where does an anti-surge chip resistor sit in EV charger electronics?
Wherever a pulse arrives before the steady state does. In a typical charger or on-board charger design, the anti-surge positions are the inrush or pre-charge path, the RC snubber across a switch, gate resistors that see Miller current, and discharge resistors across the DC link.
Each position sees a short high-energy event rather than a steady load, which is exactly the duty a general-purpose film is not rated for. Our walkthrough of passive components for an EV on-board charger shows where each sits. For a Polish supplier, the practical step is to mark those positions on the BOM and cross only those to an anti-surge family. We give no legal or type-approval advice; confirm with your compliance team.
How can Venatech help an EV electronics maker in Poland?
How Venatech helps starts with your BOM. Venatech Limited is the authorised Walsin distributor in Hong Kong, and our VenaMatch tool decodes 18 manufacturers’ part numbers and crosses 800,000+ parts to Walsin, marking each field as match or mismatch.
Paste up to 500 part numbers into the cross-reference tool, or load a whole BOM. The ready-stock list is our Hong Kong snapshot dated 23 September 2026, and it holds the four MF12E lines above. We serve small lots from Hong Kong, return fast quotes, and help you cross each line; request a quote through the site. Walsin is the line we are authorised for; Stackpole and Viking are lines we supply.
The short version
Silesia is planning an EV hub, and every charger and power board there has positions that take a pulse. Walsin covers them with 17,180 anti-surge chip resistors, 8,840 in automotive series; a 1206, 10 ohm brief returns 11 part numbers, and 830 MF12E parts give 3/4 W in a 1206 footprint. Four MF12E lines were on our Hong Kong shelf as at 23 September 2026.
Send us the pre-charge, snubber and bleeder lines from your BOM, and we will return the Walsin anti-surge parts with every field marked. Which of your 1206 resistors sees a pulse at power-up?
Related reading
- Anti-surge chip resistors
- Anti-surge versus general-purpose resistors, field by field
- Passive components for an EV on-board charger
- Free cross-reference tool and ready-stock snapshot
Last reviewed 11 Nov 2026.
Sources
Fetched 11 November 2026.
- The Star (Xinhua), “News Analysis: Polish plan for EV hub reflects Europe’s changing auto map”, 25 September 2026: https://www.thestar.com.my/news/world/2026/09/25/news-analysis-polish-plan-for-ev-hub-reflects-europe039s-changing-auto-map
Frequently asked questions
What is Poland planning for EV production in Silesia?
A Xinhua analysis carried by The Star on 25 September 2026 reports a planned EV hub in Jaworzno, Silesia, combining production, supplier development and research. It puts Poland’s battery-electric share of new cars at about 5.1% in the first eight months of 2026. These are the report’s figures.
How many anti-surge chip resistors does Walsin make?
We counted 17,180 distinct part numbers in Walsin’s anti-surge files, 8,840 of them in automotive series, from 0402 to 2512. In 1206 there are 2,411, and 830 of those MF12E parts are rated 3/4 W.
Which Walsin part crosses a 1206, 10 ohm, 5% anti-surge resistor?
WF12S100 JTL matches a 1/4 W brief on every export field; WK12S100 JTL adds power at 1/3 W, and MF12E100 JTL gives 3/4 W in an automotive series. Confirm pulse ratings against Walsin’s datasheet.
Does Venatech stock Walsin anti-surge resistors in Hong Kong?
As at 23 September 2026 our snapshot held four MF12E 1206 automotive lines: 1 ohm, 220 ohm, 330 ohm and 39 kilohm. For other values, request a quote and we source through our authorised Walsin channel; we make no lead-time promise.
Is an anti-surge chip resistor needed in an EV charger?
At positions that see a pulse rather than a steady load, such as pre-charge, snubber, gate and discharge resistors, an anti-surge family is the usual choice. Verify each against your own surge test.
Is Venatech an authorised Walsin distributor?
Yes. Venatech Limited is an authorised Walsin distributor in Hong Kong, serving buyers in Poland in small lots. We give no legal or type-approval advice; confirm with your compliance team.