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Y2 Safety Capacitor for Solar Inverters in India: A 1 GW Inverter Plant Near Ahmedabad, and 165 Walsin SMD X1/Y2 MLCC from Venatech

SolarYaan has commissioned a 1 GW solar inverter plant near Ahmedabad and plans 5 GW of hybrid inverters. For the Y2 safety capacitor across each inverter’s isolation barrier, Venatech, Walsin’s authorised distributor in Hong Kong, offers 165 Walsin surface-mount X1/Y2 MLCC in four case sizes, two of them on our shelf.

Venatech Limited, an authorised Walsin distributor in Hong Kong, wrote this for inverter designers and buyers in Ahmedabad, Gandhinagar and the wider Gujarat solar cluster. Walsin Technology (Walsin) is the line we are authorised for. The Walsin figures come from our MLCC export (23,601 distinct part numbers) and the S2 safety series inside it, re-measured on 11 November 2026, and from our ready stock list as at 23 September 2026. Every part number below is real.

What is being built for solar inverters near Ahmedabad?

Inverter and module capacity, at gigawatt scale. Energetica India reported on 6 November 2025 that SolarYaan commissioned a 1 GW solar inverter manufacturing facility near Ahmedabad and plans 5 GW of hybrid inverter production and 5 GWh of lithium-ion battery systems, with about 1,000 crore rupees of investment planned through 2030.

The Energetica India report, read on 11 November 2026, lists the range: microinverters from 600 W to 2.4 kW, string inverters from 2 kW to 136 kW, three-phase hybrid inverters from 5 to 125 kW and utility inverters of 320 to 350 kW. Module capacity is growing beside it: Energetica India reported on 19 March 2026 that Solarium Green Energy commissioned a 1 GW module line in Ahmedabad making TOPCon modules up to about 725 Wp. These are the companies’ figures as reported.

Where does a Y2 safety capacitor sit in a solar inverter?

Across the barrier between hazardous voltage and anything a person can touch. In a string or hybrid inverter, Y capacitors bridge the primary and secondary of the auxiliary flyback supply and connect line to protective earth in the EMI filter; a Y-class part is designed so that it fails open, never short, across that barrier.

X1/Y2 parts carry both ratings, so one footprint can serve line-to-line (X) and line-to-earth (Y) positions. Two things then limit the value you choose. Earth leakage: total Y capacitance from line to earth drives touch current, and the limit comes from the product safety standard your inverter is certified to, so confirm it with your compliance team. And creepage: the gap between pads must suit your working voltage and pollution degree, which is one reason safety MLCC come in long cases. Our post on X1/Y1 versus X1/Y2 safety capacitors explains the classes.

How many Walsin X1/Y2 MLCC can Venatech supply?

165 distinct surface-mount part numbers. We counted 165 Walsin S2-series X1/Y2 safety MLCC in our export: 52 in 1808, 34 in 1812, 57 in 2211 and 22 in 2220, split between 81 NP0 and 84 X7R parts, from 3 pF up to 4.7 nF in 2220.

That range covers the usual inverter values: 100 pF to 470 pF NP0 for EMI and snubber positions where stability matters, and 1 nF to 4.7 nF X7R for primary-to-secondary bridging. A surface-mount Y capacitor also removes a hand-inserted leaded disc from an otherwise reflow-only board, which simplifies assembly on a high-volume line.

Brief	Walsin part	Size, dielectric, value	Tolerance	Match / mismatch	On our shelf, 23 Sep 2026
1 nF Y2, smallest case	`S242B102K502`	1808, X7R, 1 nF	10%	Match	Yes
1 nF Y2, 1812 pad	`S243B102K502`	1812, X7R, 1 nF	10%	Match; mismatch on footprint against 1808	Request a quote
1 nF Y2, wide creepage	`S255B102K502`	2220, X7R, 1 nF	10%	Match; mismatch on footprint against 1808	Request a quote
2.2 nF Y2	`S252B222K502`	2211, X7R, 2.2 nF	10%	Match	Yes
4.7 nF Y2	`S255B472K502`	2220, X7R, 4.7 nF	10%	Match	Request a quote
100 pF, stable dielectric	`S243N101K502`	1812, NP0, 100 pF	10%	Match	Request a quote

Read the code from left to right: S2 is the safety series, the next digits give the case (42 is 1808, 43 is 1812, 52 is 2211, 55 is 2220), then dielectric (B for X7R, N for NP0), value and tolerance. Our post on how to read a Walsin MLCC part number covers the general scheme.

What should an Ahmedabad inverter team check before switching?

The approval marks, the AC rating and the land pattern. We checked our export for the S2 safety series: it gives size, dielectric, value and tolerance for all 165 parts, while the approval marks and certificate numbers that a safety file needs come from Walsin’s datasheet and the certifying bodies, so pull those for the exact part number.

Then check three engineering points. First, the X7R parts lose capacitance with temperature and AC voltage like any class II MLCC, so if a filter corner frequency matters, use NP0 or measure the X7R part in circuit. Second, the 2211 and 2220 cases add creepage; a 1808 pad may not meet your working-voltage spacing. Third, reflow profile: large ceramic cases are sensitive to board flex, so keep them away from board edges and screw points.

How can Venatech help a Gujarat inverter team?

How Venatech helps starts with a cross, not a guess. VenaMatch at /cross-reference/ decodes 18 manufacturers’ part numbers and crosses 800,000+ parts to Walsin, returning every field marked match or mismatch, so a Y capacitor from your current supplier comes back with its Walsin S2 candidate, case size and dielectric side by side.

Upload a full BOM at /bom/, browse the MLCC range, and check the ready stock list, a snapshot as at 23 September 2026 that is never live-synced. Two S2 lines were on it. For anything else, request a quote and we source it through our authorised Walsin channel. We serve from Hong Kong in small lots with fast quotes, hold no office in India, give no legal, customs or conformity advice, and leave qualification with you.

The short version

SolarYaan commissioned a 1 GW inverter plant near Ahmedabad, per Energetica India on 6 November 2025.
Venatech, Walsin’s authorised distributor in Hong Kong, offers 165 Walsin SMD X1/Y2 MLCC in 1808, 1812, 2211 and 2220.
1 nF and 2.2 nF X7R parts were on our shelf as at 23 September 2026.
Confirm approvals and AC rating on Walsin’s datasheet; confirm leakage limits with your compliance team.

Paste your Y capacitors into the free cross-reference tool and read each field as match or mismatch.

Frequently asked questions

What did SolarYaan commission near Ahmedabad?

Per Energetica India on 6 November 2025, SolarYaan commissioned a 1 GW solar inverter plant near Ahmedabad, Gujarat, and plans 5 GW of hybrid inverters and 5 GWh of battery systems.

How many Walsin Y2 safety capacitors are surface mount?

We counted 165 Walsin S2-series X1/Y2 MLCC in our export, re-measured on 11 November 2026: 52 in 1808, 34 in 1812, 57 in 2211 and 22 in 2220.

Is there a Walsin 1 nF X1/Y2 MLCC in 1808?

Yes. S242B102K502 is 1808, X7R, 1 nF, plus or minus 10 percent, and it was on Venatech’s shelf as at 23 September 2026.

What is the highest-value Walsin SMD X1/Y2 capacitor?

In our export the 2220 case reaches 4.7 nF, for example S255B472K502, X7R, plus or minus 10 percent. Request a quote; we source it through our authorised Walsin channel.

Can an SMD Y2 capacitor replace a leaded disc in an inverter?

Often, if value, class, creepage and approvals line up. Check the approval marks on Walsin’s datasheet and confirm with your compliance team before you change a safety part.

Is Venatech an authorised Walsin distributor in India?

Venatech is Walsin’s authorised distributor in Hong Kong and ships to customers in India from Hong Kong. We give no price, lead-time or stock guarantee.