Smart meter electronics for India that need a plus or minus 0.1 percent resistor above 1 megohm have a narrow path in the Walsin Technology (Walsin) range: of 228 such parts, all 228 are in 2010 or 2512, all are 100 ppm per degree Celsius or looser, and none is on our shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Walsin chip resistor exports (234,707 rows, 234,294 distinct part numbers, jumper files excluded) and our stock list as at 23 September 2026. It is for a design engineer at a meter or metering-module maker around Noida who has a high-value resistor on a mains-sense divider. Every part number is real and every count is ours. The two market statements name their sources and the day we fetched them, 10 November 2026.
What was reported about a Noida smart meter plant and the Uttar Pradesh rollout?
Two reports bear on the Noida area: a planned meter plant, and a large state rollout. According to Indian Infrastructure on 25 January 2024, Indraprastha Gas Limited and Genesis Gas Solutions formed a joint venture, with a 51 and 49 percent split, to build a smart meter plant in Noida with a capacity of 1 million meters a year.
The same report gives the site as 65,000 square feet and the investment as about 1.08 billion rupees. It does not say whether the meters are for gas, electricity or water, so we draw no conclusion about the design. On the demand side, a page dated 14 June 2026 that credits ET EnergyWorld reports that the Uttar Pradesh utility had installed 89.67 lakh smart meters, about 8.97 million, under the national distribution scheme. Those are the reports’ figures, not ours. We have no relationship with either company and say nothing about what they buy.
Why does a meter voltage divider need resistors above 1 megohm?
Because the divider has to drop a mains voltage while wasting almost no power. For a 230 V nominal supply, an assumed value that you should replace with your own network figure, a 2.2 megohm top leg dissipates about 24 milliwatts in total, which is why the legs are megohm values rather than kilohm ones.
The arithmetic is plain: 230 volts squared over 2.2 million ohms is 0.024 watts. Heat is not the limit. Voltage is. Walsin’s general purpose WR datasheet (file ASC_WR_V24, dated September 2016, one of the two resistor sheets we hold) prints a maximum operating voltage of 200 V for a 1206, 150 V for a 0805, 75 V for a 0603 and 50 V for a 0402. So a 0603 cannot sit alone across a mains peak, and the top leg is a chain of several parts. Ratio accuracy then depends on how well the chain and the lower leg track, which is why a 0.1 percent tolerance and a low temperature coefficient are asked for at the same time.
The WR sheet is ten years old and covers the WR family only. We hold no datasheet for the High Precision series discussed below, so its working voltage is not stated here.
Where does the Walsin plus or minus 0.1 percent range stop above 1 megohm?
Above 1 megohm it stops at two case sizes. We counted, in the High_Precision_Thick_Film_chip_resistor_*.xlsx files, 254 plus or minus 0.1 percent rows at 1 megohm or higher across the High Precision Thick Film series: 26 are exactly 1 megohm, and the other 228 are above it, 114 in 2010 and 114 in 2512, with none in 0201, 0402, 0603, 0805, 1206 or 1210.
All 228 carry a temperature coefficient of 100 ppm per degree Celsius or looser. The 50 ppm grade at plus or minus 0.1 percent exists in this range only at exactly 1 megohm: 8 rows, two each in 0402, 0603, 0805 and 1206. Someone who needs 4.7 megohm at 0.1 percent and 50 ppm will not find it. The nearest the export offers is 3.3 megohm at plus or minus 0.5 percent and 50 ppm, in 0805 and 1206 only, 114 rows.
| Walsin part | Size | Resistance | Tolerance | TCR | Rated power | On shelf 23 Sep 2026 | Match / mismatch with a 1 MΩ, plus or minus 0.1%, 50 ppm, 0805 brief | Your incumbent |
|---|---|---|---|---|---|---|---|---|
WF08K1004BTL |
0805 | 1 MΩ | plus or minus 0.1% | 50 ppm | 1/8 W | No | Match on size, value, tolerance and TCR | |
WF12K1004BTL |
1206 | 1 MΩ | plus or minus 0.1% | 50 ppm | 1/4 W | No | Match on value, tolerance, TCR; mismatch in size | |
WF08H1004BTL |
0805 | 1 MΩ | plus or minus 0.1% | 100 ppm | 1/8 W | No | Mismatch: TCR is 100 ppm, twice the brief | |
WF20H4704BTL |
2010 | 4.7 MΩ | plus or minus 0.1% | 100 ppm | 1/2 W | No | Mismatch: value, size and TCR; the first size that reaches 4.7 MΩ at 0.1% | |
WR06X1004FTL |
0603 | 1 MΩ | plus or minus 1% | 100 ppm | 1/10 W | Yes | Mismatch: tolerance ten times looser, TCR, and size |
The table is built from those .xlsx exports and the stock list as at 23 September 2026. A match in it is a match on the export fields and nothing more. Confirm against the datasheet and qualify in your own circuit. Our post on tolerance, TCR and dielectric codes decoded explains how to read the code letters in these part numbers.
What does the Hong Kong shelf hold above 1 megohm?
Five lines, none of them tight-tolerance. Of the 19,758 chip resistor rows at 1 megohm or above, 5 are on our stock list as at 23 September 2026, all General Purpose at plus or minus 1 percent: WR06X1004FTL in 0603, and WR04X1004FTL, WR04W1504FTL, WR04W2704FTL and WR04W3304FTL in 0402.
None of the 254 plus or minus 0.1 percent rows is stocked, and nor is any of the 1,901 rows at plus or minus 0.5 percent or tighter. The shelf snapshot lists 1,125 distinct part numbers in all, re-counted by us. The ready stock list is a dated snapshot and never live-synced, and the chip resistor range lists the families. If your divider needs a tight-tolerance high-value part, that is a to-order enquiry, and we give no lead time or price.
What will we not tell you about meter makers?
Anything about their approvals, accuracy class or purchasing. Of the 28 Walsin datasheets we hold, 2 cover chip resistors, and neither covers the High Precision series, so every count here is catalogue coverage and not a statement about suitability for a metering class.
We make no claim that a part meets an accuracy or insulation requirement of any metering standard, and we do not know what any named company’s meters contain. We hold no office, entity or stock in India; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen, with Chengdu in preparation. We hold no ISO 9001 or IATF 16949 certificate. We give no legal, customs or conformity advice; confirm with your compliance team.
How can Venatech help a Noida meter maker?
How Venatech helps starts with a free paste box. The cross-reference tool, VenaMatch, decodes 18 manufacturers’ part numbers across 800,000+ crossable parts, accepts up to 500 part numbers or an Excel or CSV file, and marks each field of a Walsin candidate as match or mismatch. You can also load a whole BOM for review. The ready-stock list is a Hong Kong snapshot dated 23 September 2026.
Worked example from our own export: a 1 megohm, plus or minus 0.1 percent, 50 ppm 0805 brief returns one 0805 match and one 1206 neighbour, and a 4.7 megohm brief returns no 50 ppm part at all. Walsin is the only line we are authorised for. Stackpole and Viking are lines we supply. We serve from Hong Kong in small lots, we help cross-reference, and you request a quote through the site.
The short version
For a Noida meter design, plus or minus 0.1 percent above 1 megohm is a two-size catalogue: 228 parts in 2010 and 2512, all at 100 ppm or looser, none on the shelf. Check the divider chain against the working voltage of the size before you fix the value.
Send us one high-value resistor line from your meter BOM, with the tolerance and TCR you must keep, and we will return the Walsin parts with every difference stated. If the 50 ppm grade is essential, which can move: the value or the tolerance?
Sources
Fetched 10 November 2026.
- Indian Infrastructure, “IGL, Genesis Gas forms JV for smart meter manufacturing plant”, 25 January 2024: https://indianinfrastructure.com/2024/01/25/igl-genesis-gas-forms-jv-for-smart-meter-manufacturing-plant/
- Pulse (crediting ET EnergyWorld), “UPPCL installs 89 lakh smart meters, bills 85 lakh consumers under RDSS”, 14 June 2026: https://www.pulse.bot/govtech/news/uppcl-installs-89-lakh-smart-meters-bills-85-lakh-consumers-under-rdss-cccc4981-5ed4-4d90-91af-3e0f97848270/
- Walsin WR General Purpose Chip Resistor approval sheet, ASC_WR_V24, September 2016 (held by Venatech; no public URL held, so check Walsin’s site for the current sheet).
Related reading
- Chip resistor power rating by case size
- Anti-surge chip resistors
- Tolerance, TCR and dielectric codes decoded
- Free tools: VenaMatch cross reference and the ready stock list
Last reviewed 10 Nov 2026.
Frequently asked questions
What did Indian Infrastructure report about a Noida smart meter plant?
On 25 January 2024 it reported a joint venture of Indraprastha Gas Limited and Genesis Gas Solutions, 51 and 49 percent, to build a smart meter plant in Noida for 1 million meters a year, at about 1.08 billion rupees. It did not state the meter type.
How many smart meters has Uttar Pradesh installed according to the June 2026 report?
A page dated 14 June 2026, crediting ET EnergyWorld, gives 89.67 lakh, about 8.97 million. These are the report’s figures, not ours, and we read the page as served. Check the original before quoting.
Does Walsin make a plus or minus 0.1 percent resistor above 1 megohm in 0805?
No. In the High Precision series the export holds plus or minus 0.1 percent above 1 megohm only in 2010 and 2512, 114 rows each, all at 100 ppm or looser. At 0805 the series stops at exactly 1 megohm for that tolerance.
Is a 50 ppm part available at plus or minus 0.1 percent above 1 megohm?
Not in the export. The 50 ppm grade at 0.1 percent exists only at exactly 1 megohm, in 8 rows. Above 1 megohm, 50 ppm exists at plus or minus 0.5 percent, up to 3.3 megohm in 0805 and 1206.
Which of these resistors are on the Hong Kong shelf?
Five lines at 1 megohm or higher, all plus or minus 1 percent General Purpose in 0402 or 0603. None of the 254 plus or minus 0.1 percent rows is stocked. The snapshot is dated 23 September 2026, not live.
Do you hold stock or an office in India?
No. We hold no office, entity or stock in India; our locations are Hong Kong, Shenzhen, Singapore and Jiangmen. We give no legal, customs or conformity advice. Confirm with your compliance team.