Smart meter electronics for Brazil need stable divider resistors, and the Walsin Technology (Walsin) export lists 1,565 high-precision chip resistors at 1 megohm or above. Only 8 pair plus or minus 0.1 percent with 50 ppm or better, all at exactly 1 megohm, and none of the 1,565 is on our Hong Kong shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Walsin chip-resistor export (234,815 rows, 234,401 distinct part numbers) and our stock list as at 23 September 2026. It is for a design or sourcing engineer at a Brazilian meter maker, or a contract manufacturer in the state of Sao Paulo, who is choosing a high-value resistor for a voltage-sense divider. Every part number is real and every count is ours. The market statements name their source and the day we fetched it, 10 November 2026.
What did Brazil order for smart meters in 2026, and why does it reach a resistor buyer?
It ordered a steady annual roll-out. According to Canal Solar (published 30 January 2026, updated 27 February 2026), the energy ministry’s Portaria Normativa 126/2026 requires distributors to fit smart meters in 2 percent of consumer units per year for 24 months from 1 March 2026, and the regulator ANEEL opened Public Consultation 001/2026 on 27 January 2026.
The same article reports that CPFL Energia plans to replace 1.6 million conventional meters by 2029, at a total investment of 1.2 billion reais, in cities in the interior of Sao Paulo state. Those are the publisher’s figures, not ours. Our view, labelled as ours: a meter that measures mains voltage usually does so through a resistor divider, and a divider is where ratio drift becomes a billing error. We have no relationship with CPFL, ANEEL or any Brazilian meter maker, and we do not know what any of them buys.
How many Walsin high-precision resistors sit at 1 megohm or above, and how tight are they?
Fewer than you would hope at the tight end. We parsed all 52,027 distinct high-precision thick-film part numbers in the Walsin export, across 7 series, and counted 1,565 at 1 megohm or above: 1,062 at plus or minus 0.5 percent, 254 at plus or minus 0.1 percent, 241 at plus or minus 1 percent and 8 at plus or minus 0.25 percent.
We then sorted the 1,565 by temperature coefficient. Of them, 721 carry a 100 ppm limit, 574 a 200 ppm limit and 270 a 50 ppm limit; not one carries 25 ppm, because the 25 ppm line (3,087 rows in 0603, 0805 and 1206) stops at 470 kilohm. Among the 254 at plus or minus 0.1 percent, 244 carry the 100 ppm limit, 2 the 200 ppm limit and 8 the 50 ppm limit. We have not seen this counted anywhere.
Those 8 are the nowhere-else fact in this post: they are WF04K1004BTL, WF06K1004BTL, WF08K1004BTL and WF12K1004BTL, each with an automotive-labelled twin ending in J, and all eight are exactly 1 megohm. Above 1 megohm, plus or minus 0.1 percent with 50 ppm does not exist in the export. Our post on tolerance, TCR and dielectric codes decoded explains how to read the suffix letters, and the chip resistor range lists the families.
Which Walsin parts cross a 1 megohm, 0805, plus or minus 0.1 percent, 50 ppm brief, and what differs?
One matches on every field. We filtered the export for 0805, 1 megohm and plus or minus 0.1 percent and found 5 part numbers in 5 series, differing only in temperature coefficient and grade; exactly 1, WF08K1004BTL, matches a 50 ppm brief on every field the export carries.
The reader’s incumbent goes in the last column.
| Walsin part | Series, case | Value, tolerance, TCR, power | On shelf 23 Sep 2026 | Match / mismatch against 1 megohm, 0805, plus or minus 0.1 percent, 50 ppm | Your incumbent |
|---|---|---|---|---|---|
WF08K1004BTL |
High precision TC50, 0805 | 1 megohm, plus or minus 0.1%, 50 ppm, 1/8 W | No | Match on every export field | |
WF08K1004BTLJ |
High precision TC50 (Automotive), 0805 | 1 megohm, plus or minus 0.1%, 50 ppm, 1/8 W | No | Match on the electrical fields; mismatch: automotive-labelled grade | |
WF08H1004BTL |
High precision TC100, 0805 | 1 megohm, plus or minus 0.1%, 100 ppm, 1/8 W | No | Mismatch: TCR is 100 ppm, looser | |
SF08H1004BTL |
High precision anti-sulfuration, 0805 | 1 megohm, plus or minus 0.1%, 100 ppm, 1/8 W | No | Mismatch: TCR is 100 ppm; different series | |
WF08J4703BTL |
High precision TC25, 0805 | 470 kilohm, plus or minus 0.1%, 25 ppm, 1/8 W | No | Mismatch: value is 470 kilohm; the 25 ppm line stops there |
A match in the table is a match on the export fields, no more. The chip-resistor export carries no maximum working voltage and no ratio-tracking figure, so neither can be compared. Confirm against both datasheets and qualify in your own circuit. Our post on high-precision thick film against thin film sets out when the extra cost of thin film is worth it.
What does the Hong Kong shelf hold in high-precision resistors?
Five part numbers, none above 820 kilohm. Our stock list as at 23 September 2026 holds 1,125 distinct part numbers; 5 are high-precision resistors, at 12 kilohm, 57.6 kilohm and 820 kilohm in plus or minus 0.1 percent and at 12 kilohm and 33 kilohm in plus or minus 0.5 percent, and none is 1 megohm or above.
The nearest shelf part to a 1 megohm brief is WF08H8203BTL, 820 kilohm, plus or minus 0.1 percent, 100 ppm, 0805. It is a different value, not a drop-in. A megohm divider leg is therefore a factory order, requested through the site. The ready stock list is a dated snapshot, never live-synced, and we quote part-number counts, never piece counts.
What will we not tell you about smart meters?
Anything about a meter design, a divider layout or a certification. We searched all 28 Walsin datasheets we hold, 451 pages, and found none for the high-precision resistor series; the two resistor sheets we hold are WR and MR, so we cannot give you a working voltage or a ratio-tracking figure for any of the 1,565 parts.
We make no claim that any part suits a meter, a billing standard or a Brazilian approval, or that a catalogue step is right for your accuracy class. We hold no ISO 9001 or IATF 16949 certificate. We hold no office, entity or stock in Brazil; 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 Sao Paulo meter designer?
By showing every difference before the board is laid out. Venatech Limited is an authorised Walsin distributor in Hong Kong, and the Walsin export we hold covers 359,135 distinct part numbers; our VenaMatch tool decodes 18 manufacturers’ part numbers and covers 800,000+ crossable parts.
- Cross-reference. Paste the incumbent divider resistor into the free cross-reference tool, or up to 500 part numbers or an Excel or CSV file, and read the Walsin candidates with each field marked match or mismatch.
- BOM check. Upload the whole bill of materials to /bom/ and request a quote.
- Ready stock. The ready-stock list is a Hong Kong snapshot dated 23 September 2026, not live.
- Service. Hong Kong-based, small lots welcome, and help by hand when the tool returns no clean candidate. Walsin is the only line we are authorised for; Stackpole and Viking are lines we supply.
Worked example from our own export: a 1 megohm, 0805, plus or minus 0.1 percent, 50 ppm line maps to 1 exact part among 5 variants, not on the shelf, and the nearest shelf part is an 820 kilohm value. Qualification stays with you.
The short version
For a Brazilian smart meter designer, a 1 megohm divider leg at plus or minus 0.1 percent and 50 ppm exists in 8 Walsin part numbers across four case sizes, nothing tighter exists above 1 megohm, the 25 ppm line stops at 470 kilohm, and the Hong Kong shelf holds no resistor at 1 megohm or above.
Send us one divider resistor from your meter BOM, with the tolerance, TCR and case size you can accept, and we will return the Walsin parts with every difference stated. If your incumbent prints only 1 megohm, do you know which of the 5 variants you are buying?
Sources
Fetched 10 November 2026.
- Canal Solar, interview on smart meter challenges in Brazil, published 30 January 2026, updated 27 February 2026: https://canalsolar.com.br/medidores-inteligentes-desafios-persistem-avalia-jose-marangon/
Related reading
- High-precision thick film against thin film
- Tolerance, TCR and dielectric codes decoded
- Chip resistor power rating by case size
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
What did Brazil require for smart meters in 2026?
Canal Solar reported on 30 January 2026 that Portaria Normativa 126/2026 requires distributors to fit smart meters in 2 percent of consumer units per year for 24 months from 1 March 2026, and that ANEEL opened Public Consultation 001/2026 on 27 January 2026. These are the publisher’s figures, not ours.
How many Walsin high-precision resistors are 1 megohm or above?
We counted 1,565 distinct part numbers at 1 megohm or above among 52,027 high-precision thick-film part numbers: 1,062 at plus or minus 0.5 percent, 254 at plus or minus 0.1 percent, 241 at plus or minus 1 percent and 8 at plus or minus 0.25 percent.
Is there a Walsin 1 megohm resistor at plus or minus 0.1 percent and 25 ppm?
No. The 25 ppm line has 3,087 rows in 0603, 0805 and 1206 and stops at 470 kilohm. At 1 megohm and plus or minus 0.1 percent the tightest temperature coefficient in the export is 50 ppm. Confirm against the datasheet before design-in.
Which Walsin part matches a 1 megohm, 0805, plus or minus 0.1 percent, 50 ppm brief?
WF08K1004BTL matches on every export field: 0805, 1 megohm, plus or minus 0.1 percent, 50 ppm and 1/8 W. WF08K1004BTLJ matches on the electrical fields but carries the automotive-labelled suffix. Neither is on our shelf. Qualify in your own circuit.
Does Venatech stock a 1 megohm precision resistor?
Not as at 23 September 2026. Our list holds 5 high-precision resistor part numbers, none at 1 megohm or above; the nearest is WF08H8203BTL at 820 kilohm. The snapshot is dated, not live, so request a quote through the site.
Do you hold stock or an office in Brazil?
No. We hold no office, entity or stock in Brazil; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We hold no ISO 9001 or IATF 16949 certificate and give no legal, customs or conformity advice. Confirm with your compliance team.