Battery storage electronics for Australia may use high-voltage chip resistors where a battery string is sensed, and Walsin Technology (Walsin) lists 20,244 of them in four families, none on our shelf. AEMO reported on 28 July 2026 that grid-scale battery capacity more than doubled in a year to exceed 9 GW.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for an Australian storage or inverter design engineer choosing a high-voltage chip resistor for a battery string. 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. Where a part number has a space, we have kept it.
What did AEMO report about batteries in Australia’s market in July 2026?
AEMO’s quarterly energy dynamics release of 28 July 2026 reported that household battery capacity grew by 3,283 MWh, or 41 percent, in the June 2026 quarter, and that grid-scale battery capacity more than doubled over the past year to exceed 9 GW.
It also reported that Western Australia added more than 1 GW of grid-scale battery capacity since the second quarter of 2025, and that renewables supplied 42.1 percent of generation. Those are AEMO’s figures, not ours. We know nothing of which companies build the battery electronics and make no claim about any named one.
How many high-voltage chip resistors does Walsin list, and in what sizes?
We parsed every Walsin chip-resistor export file and found 20,244 distinct high-voltage part numbers in four families, in five sizes: 0603, 0805, 1206, 2010 and 2512.
The families are standard (10,437), automotive (6,803), and two UL-safety-certification families of 1,502 each. The size decides the power: in all 20,244 parts, each size carries exactly one rated power (1/10 W at 0603, 1/8 W at 0805, 1/4 W at 1206, 1/2 W at 2010, 1 W at 2512). Rated working voltage is not a column in the export, so it cannot be searched. Take it from the datasheet; we hold no high-voltage resistor datasheet (see the chip resistor range) and say so.
Does the UL safety-certification family differ from the standard family?
Not in the export fields: 1,494 of the 1,502 UL-family part numbers have a standard-family twin with the same size, resistance, tolerance and TCR. The UL family only exists from 100,000 ohm to 100,000,000 ohm, while the standard family starts at 47 ohm.
The export names the family but carries no certificate number or voltage column, so what the UL family adds sits in documents we do not hold. We have not seen this twin count anywhere else. If your design needs a safety certification, ask for the document for the exact part number; the family name alone is not evidence. Separately, 2,657 part numbers in this family contain a space and must be pasted as printed: see why Walsin part numbers do not paste into your BOM.
Which Walsin parts answer a 1 megohm, 1206, 1 percent high-voltage brief?
12 part numbers at 1 megohm in 1206 across the four families, of which 5 are at plus or minus 1 percent; two plain-family parts match a 100 ppm brief on every export field, under different prefixes.
The rest differ by prefix, series or tolerance. Put your incumbent in the last column.
| Walsin part | Series, size, resistance, tolerance, TCR, power | On shelf 23 Sep 2026 | Match / mismatch with a 1 megohm, 1206, plus or minus 1 percent, 100 ppm brief | Your incumbent |
|---|---|---|---|---|
WK12V1004FTL |
HV chip resistor, 1206(3216), 1000000Ω, plus or minus 1%, TCR up to 100 ppm, 1/4W | No | Match on every export field | |
WF12V1004FTL |
HV chip resistor, 1206(3216), 1000000Ω, plus or minus 1%, TCR up to 100 ppm, 1/4W | No | Match on the export fields; mismatch in prefix (WF against WK), a difference the export does not explain | |
WK12V1004FTLJ |
HV chip resistor (Automotive), 1206(3216), 1000000Ω, plus or minus 1%, TCR up to 100 ppm, 1/4W | No | Match on the electrical fields; mismatch in series: Automotive, with a J suffix | |
WF12N1004FTL |
HV chip resistor UL Safety Certification, 1206(3216), 1000000Ω, plus or minus 1%, TCR up to 100 ppm, 1/4W | No | Match on the electrical fields; mismatch in series: UL Safety Certification | |
WK12V1004DTL |
HV chip resistor, 1206(3216), 1000000Ω, plus or minus 0.5%, TCR up to 100 ppm, 1/4W | No | Mismatch: tolerance is plus or minus 0.5 percent, tighter | |
WK12V105 JTL |
HV chip resistor, 1206(3216), 1000000Ω, plus or minus 5%, TCR up to 100 ppm, 1/4W | No | Mismatch: tolerance is plus or minus 5 percent, and the part number contains a space |
A match here is a match on export fields only. Confirm against both datasheets and qualify in your own circuit. The method is in how to cross-reference an MLCC, which applies field by field to resistors too.
Is any Walsin high-voltage chip resistor on the Hong Kong shelf?
No: 0 of 20,244 high-voltage part numbers appear in the stock snapshot as at 23 September 2026, against 183 of 234,401 chip-resistor part numbers overall.
The ready stock list is a dated snapshot, never live-synced. Every part in the table is a to-order enquiry, and we state no lead time or quantity. For a quick build, send the resistance, size and tolerance you can accept and we will return the candidates.
What will we not tell you about Australian battery design?
We will not tell you the working voltage a string divider needs, the creepage you must keep, or which part your design suits. The export has no voltage column for these resistors, and we hold only two resistor datasheets, neither for high-voltage parts.
We hold no ISO 9001 or IATF 16949 certificate and claim no office, entity or stock in Australia; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. The UL family names are the series names in the export, not a claim by Venatech. We give no legal, customs or conformity advice. Confirm with your compliance team.
How can Venatech help an Australian storage designer?
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 1 megohm, 1206, plus or minus 1 percent brief returns 5 variants across four families, 2 plain-family parts matching on every export field and none on the shelf. 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
AEMO reported grid-scale batteries above 9 GW on 28 July 2026. In the Walsin export, the high-voltage chip resistor is 20,244 part numbers, power is fixed by size, 1,494 of 1,502 UL-family parts have a standard twin, and 0 are on our shelf.
Send us one high-voltage resistor line from your battery-string board with the size and tolerance you can accept, and we will return the Walsin parts with every difference stated. Does your BOM tool keep the space in a part number?
Sources (fetched 10 November 2026)
- Australian Energy Market Operator, Quarterly Energy Dynamics Q2 2026 media release, 28 July 2026: https://www.aemo.com.au/newsroom/media-release/qed-q2-2026
- 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
- Chip resistor power rating by case size
- Anti-surge chip resistors
- How to cross-reference an MLCC, field by field
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
What did AEMO report about batteries on 28 July 2026?
Household battery capacity grew by 3,283 MWh (41 percent) in the quarter, and grid-scale battery capacity more than doubled over the year to exceed 9 GW. Western Australia added over 1 GW since the second quarter of 2025.
How many Walsin high-voltage chip resistors are there?
20,244 distinct part numbers in four families (standard, automotive and two UL-safety-certification families), in 0603, 0805, 1206, 2010 and 2512. Each size carries one rated power.
Is the Walsin UL-family high-voltage resistor different from the standard one?
In the export fields, usually not: 1,494 of 1,502 UL-family parts have a standard twin with the same size, resistance, tolerance and TCR. Ask for the document for the exact part number if you need certification.
Is a Walsin high-voltage chip resistor on the Hong Kong shelf?
No. 0 of 20,244 are in the snapshot dated 23 September 2026. Every part is a to-order enquiry, with no lead time or quantity stated.
Does Venatech have an office or stock in Australia?
No. Our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We serve Australian buyers from Hong Kong, in small lots, with a quote requested through the site.
Can Venatech tell me the working voltage of these resistors?
Not from the export, which has no voltage column for them. We hold no high-voltage resistor datasheet. Confirm voltage and creepage against the manufacturer datasheet and qualify in your own circuit.