Mining electronics for Chile that run hot need a 150 degree capacitor, and Walsin Technology (Walsin) lists 128 in its high-temperature series: 102 X8G and 26 X8R. The datasheet we hold covers X8G only, tops out at 15 nF, and 5 of the 26 X8R parts exceed that. None of the 26 is on our shelf.
Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this from the Walsin MLCC export (24,026 rows, 23,601 distinct part numbers), the Walsin high-temperature datasheet dated April 2026, and our stock list as at 23 September 2026. It is for a design or sourcing engineer at a Chilean mining-equipment maker, integrator or sensor assembler in or around Santiago who is crossing a high-temperature ceramic capacitor. Every part number is real and every count is ours, re-measured on 10 November 2026. The market statement names its source and the day we fetched it.
What did Cochilco forecast for Chilean copper output, and why does a component buyer care?
It cut its forecast and named the mines. According to Reuters, carried by Capital.com on 30 October 2026, Cochilco forecast Chile’s 2026 copper output down 8.4 percent to 4.94 million tonnes, after January to September output of 3.63 million tonnes (down 8.5 percent), with BHP’s Escondida and Spence and state-run Codelco mines accounting for more than 77 percent of the net decline.
The same report cites lower ore grades, maintenance and disruptions, and a 3 percent recovery to 5.08 million tonnes in 2027. Those are the report’s figures, not ours. The reading is ours: a sector working through disruptions and maintenance keeps attention on equipment condition, and condition sensing is the application the Walsin high-temperature datasheet itself names. We have no relationship with Cochilco, Codelco, BHP or any Chilean maker, and we say nothing about what any of them buys.
Which Walsin MLCC meet a 100 nF, 50 V, 1206, 150 degree brief, and what differs?
One, and it is the part the datasheet does not describe. We parsed the 128 high-temperature parts: at 100 nF, 50 V and 1206 there is exactly 1, HT31R104K500, which is X8R; the X8G half of the series stops at 15 nF in 1210 and at 10 nF in 1206.
Our brief is ours. The reader’s incumbent goes in the last column.
| Walsin part | Description | On shelf 23 Sep 2026 | Match / mismatch with the brief | Your incumbent |
|---|---|---|---|---|
HT31R104K500 |
High Temperature, 1206, X8R, 100 nF, plus or minus 10%, 50 V, 1.25 mm | No | Match on size, value and voltage; mismatch risk: X8R, and the datasheet we hold has no X8R table | |
HT31R473K500 |
High Temperature, 1206, X8R, 47 nF, plus or minus 10%, 50 V | No | Mismatch: 47 nF, not 100 nF | |
HT21R473K500 |
High Temperature, 0805, X8R, 47 nF, plus or minus 10%, 50 V | No | Mismatch: 47 nF and 0805 | |
HT32G153J500 |
High Temperature, 1210, X8G, 15 nF, plus or minus 5%, 50 V | No | Mismatch: 15 nF, 1210 and X8G, the largest X8G in the series | |
HT31G103J101 |
High Temperature, 1206, X8G, 10 nF, plus or minus 5%, 100 V | No | Mismatch: 10 nF and 100 V | |
HT21G472K500 |
High Temperature, 0805, X8G, 4.7 nF, plus or minus 10%, 50 V | Yes | Mismatch: 4.7 nF and 0805; the nearest shelf part |
A match in the table is a match on the export fields, no more. Confirm against both datasheets and qualify in your own circuit. Our post on NP0 against X7R against X5R dielectrics explains the class split behind X8G and X8R, and MLCC DC bias and voltage derating explains why a class II part at 100 nF will not deliver 100 nF at working voltage.
Does the Walsin high-temperature datasheet cover X8R?
Only as one row in a construction table. We read all 11 pages of the Walsin High Temperature approval sheet (April 2026): the cover says X8G Dielectrics, the electrical table lists X8G only with a range of 0.2 pF to 0.015 microfarad and operating temperature of minus 55 to plus 150 degrees Celsius, and X8R appears once, as a ceramic-material column on page 9.
The export holds 26 X8R parts, all 50 V and plus or minus 10 percent, in 0603 (8), 0805 (9) and 1206 (9). Five of them exceed the sheet’s 0.015 microfarad ceiling: HT21R223K500 and HT31R223K500 at 22 nF, HT21R473K500 and HT31R473K500 at 47 nF, and HT31R104K500 at 100 nF. Our own datasheet index, written when we filed the sheet, lists the range as 0.2 pF to 0.047 microfarad, so the three documents disagree. We have not seen this counted anywhere.
How large can a high-temperature Walsin MLCC be at each case size?
Larger in X8R, but only by leaving the datasheet. From the export, the largest X8G is 470 pF in 0402, 3.3 nF in 0603, 10 nF in 0805 and 1206, and 15 nF in 1210; the largest X8R is 10 nF in 0603, 47 nF in 0805 and 100 nF in 1206.
X8G is the stable choice in the datasheet we hold, with a stated change of 30 ppm per degree Celsius, and X8R is the way to a larger value. The trade is a class II dielectric with voltage and ageing effects the X8G does not have. The 128 parts are 7 in 0402, 31 in 0603, 37 in 0805, 33 in 1206 and 20 in 1210. If your sensor circuit needs more than 15 nF at 150 degrees, you are in X8R territory and the evidence for it is thinner.
What does the Hong Kong shelf hold in high-temperature MLCC?
Two X8G parts. Of the 128 high-temperature part numbers, 2 are on our stock list as at 23 September 2026: HT21G331K500 (330 pF) and HT21G472K500 (4.7 nF), both X8G in 0805; none of the 26 X8R parts is stocked.
The ready stock list is a dated snapshot, never live-synced, and the MLCC range lists the families. If your brief needs a value the shelf lacks, ask for a to-order enquiry through the site; we will say plainly what we hold and what we do not.
What will we not tell you about mining sensors?
Anything about your enclosure temperature, your sensor circuit or your hazardous-area approvals. Of the 28 Walsin datasheets we hold, 26 cover MLCC series and 1 of them is the high-temperature sheet, which names measuring instruments and sensor modules as applications but no mining product, so every count here is catalogue coverage, not suitability.
We make no claim that any part suits a mine, a sensor or a particular temperature. We hold no ISO 9001 or IATF 16949 certificate. We hold no office, entity or stock in Chile; 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 Chilean mining-electronics maker?
How Venatech helps starts with a free paste box. The cross-reference tool (VenaMatch) decodes 18 manufacturers’ part numbers, covers 800,000+ crossable parts, accepts up to 500 part numbers or an Excel or CSV file, and shows Walsin candidates with each field marked match or mismatch. Load a whole BOM for a check. The ready-stock list is a Hong Kong snapshot dated 23 September 2026.
Worked example from our own export: the 100 nF, 50 V, 1206, 150 degree brief returned 1 part in 128, an X8R the datasheet does not tabulate, and none stocked, so the first job is to name the dielectric and get the data. 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 Chilean mining-sensor board, a 150 degree capacitor is a dielectric question: 102 X8G parts to 15 nF, 26 X8R parts to 100 nF, a datasheet that tabulates only the X8G, 5 X8R parts above its ceiling, and 2 of 128 on the shelf. Name X8G or X8R, then ask for the data.
Send us one high-temperature capacitor line from your BOM, with the value, voltage and dielectric you can accept, and we will return the Walsin parts with every difference stated. If your incumbent prints only “150 degrees”, do you know whether it is X8G or X8R?
Sources
Fetched 10 November 2026.
- Reuters via Capital.com, Cochilco cuts Chilean copper forecast for 2026, 2027, 30 October 2026: https://capital.com/en-gb/news/cochilco-cuts-chilean-copper-forecast-for-2026-2027
- Walsin, Multilayer Ceramic Capacitors Approval Sheet, High Temperature Series (WTC_MLCC_High_Temperature_HT, April 2026), filed as 15_High_Temperature_HT_150C.pdf (internal file).
- Walsin MLCC export and Venatech ready-stock snapshot as at 23 September 2026, re-measured 10 November 2026 (internal files).
Related reading
- NP0, X7R and X5R dielectrics compared
- MLCC DC bias and voltage derating
- Tolerance, TCR and dielectric codes decoded
- Free cross-reference tool (VenaMatch)
- Ready stock, Hong Kong snapshot dated 23 September 2026
Last reviewed 10 Nov 2026.
Frequently asked questions
What did Cochilco forecast for Chilean copper output in October 2026?
Reuters, carried by Capital.com on 30 October 2026, reported a forecast of 4.94 million tonnes for 2026, down 8.4 percent, and 5.08 million tonnes for 2027, up 3 percent. These are the report’s figures, not ours.
How many Walsin MLCC are in the high-temperature series?
128 part numbers: 102 X8G and 26 X8R, in 0402 to 1210. Only 2 are on our shelf as at 23 September 2026, both X8G in 0805.
Does the Walsin HT datasheet cover X8R parts?
The April 2026 sheet we hold covers X8G only, with a range of 0.2 pF to 0.015 microfarad. X8R appears once, in a construction table. Request Walsin’s X8R data for the exact part number.
Which Walsin X8R parts exceed the datasheet’s capacitance range?
Five: HT21R223K500 and HT31R223K500 at 22 nF, HT21R473K500 and HT31R473K500 at 47 nF, and HT31R104K500 at 100 nF. Confirm each with Walsin before design-in.
Is X8R a drop-in for X8G at the same value?
No. They are different dielectrics, and X8G is the stable one in the datasheet we hold. X8R reaches larger values but is a class II material. Compare both datasheets and qualify in your own circuit.
Which Walsin high-temperature MLCC are on the Hong Kong shelf?
As at 23 September 2026, HT21G331K500 (330 pF) and HT21G472K500 (4.7 nF), both X8G in 0805. No X8R part is stocked. The snapshot is dated, not live.
Do you hold stock or an office in Chile?
No. We hold no office, entity or stock in Chile; 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.