Infineon Technologies (IFNNY)

Power semiconductors #1 (Infineon) — power devices for auto, industrial, data-center

AI exposure 10% — derived from reported segment revenue, not asserted.

Where it sits

Silicon Layer → Analog, Logic & Mixed-Signal ICs · figures rebased to Q3 FY2026, reported 2026-08-05

Infineon makes power semiconductors, microcontrollers and sensors — supporting silicon, not compute — so the sub-tier defined as GPUs, AI accelerators and CPUs was never right. Its automotive segment at 46% had also been left unplaced, which was classification by end market: those are the same power devices and microcontrollers as the data-centre line, and rule 1 places by what a company makes rather than who buys it. Automotive, Power & Sensor Systems and Connected Secure Systems together are 89% of revenue in this sub-tier. Its core rivalries are ADI, onsemi, TI and STMicro.

Also tagged: emerging in Physical Infrastructure → Power & Electrical Equipment.

Reported segments

• Automotive (ATV) — 46% of revenue
• Power & Sensor Systems (PSS) — 35% of revenue
• Green Industrial Power (GIP) — 11% of revenue
• Connected Secure Systems (CSS) — 8% of revenue

Infineon (~€16.3B FY2026 guided) — #1 power semiconductor maker. Automotive ~46% (largest, off-map by kind) + Power & Sensor Systems ~35% (AI data-center power — server PSUs/800V HVDC with NVDA = the AI-relevant core, primary B1; >€1.6B FY2026 AI revenue + ~€500M traditional DC, all booked here; grew to 34.6% of Q3 FY2026 revenue on the ams OSRAM fold-in + AI ramp, at a 24.9% segment margin — the highest division) + Green Industrial Power ~11% (industrial/grid/data-center power modules = B2) + Connected Secure Systems ~8% (MCUs/security). Primary B1 Semiconductor Devices. Critical AI…

How the 10% is built

• Automotive (ATV) — 46% of revenue × 0% AI-driven (estimate). Auto power and microcontroller chips have no AI-datacenter linkage; €1.932B in Q3 FY2026
• Power & Sensor Systems (PSS) — 35% of revenue × 28% AI-driven (disclosed). Mgmt Q3 FY2026 (Aug 5 2026): AI data-center power revenue >€1.6B in FY2026, all booked in PSS. €1.6B of a ~€16.3B group guide is ~10% of group; on PSS's re-based 34.6% weight that is ~28% of the segment (the prior 42% share existed only to offset the stale 22% spine row, now fixed). The ~€500M of traditional…
• Green Industrial Power (GIP) — 11% of revenue × 6% AI-driven (estimate). Held at 6% — Infineon attributes its data-center power revenue to PSS, not GIP; GIP's data-center linkage is grid-side and HVDC-adjacent industrial power, real but unquantified and small next to renewables and traction
• Connected Secure Systems (CSS) — 8% of revenue × 0% AI-driven (estimate). IoT/security microcontrollers unrelated to AI compute demand

Investment read

Moat. #1 global power-semiconductor maker with SiC/GaN breadth and automotive scale — and the data-centre power tree is now the strongest position rather than a side vector. Power & Sensor Systems earned a 24.9% segment margin in Q3 FY2026, the highest of any division, on the 800V HVDC architecture developed with NVIDIA.

Bottleneck / pricing power. Genuine pricing power where demand exceeds supply: management states AI data-centre demand 'continues to exceed available supply', raised the FY2026 AI figure to >EUR 1.6B (plus ~EUR 500M traditional data centre), and has signed or is negotiating multi-year capacity agreements with cumulative revenue potential in the high-single-digit billions of euros — contracted visibility rather than a forecast. Outside that, Chinese competitors are explicitly intensifying price pressure.

Role in the AI stack. The power-semiconductor backbone for the data-center power tree.

Connected companies

• NVIDIA (NVDA) — IFNNY supplies: power semiconductors (Si/SiC/GaN) for NVIDIA 800V HVDC GPU-rack power architecture
• Vertiv Holdings (VRT) — IFNNY supplies: power semiconductors (SiC/GaN) into data-center power systems
• Eaton Corporation (ETN) — IFNNY supplies: power devices into electrical equipment
• Tesla (TSLA) — IFNNY supplies: power semiconductors / SiC & IGBT modules for EV powertrain
• Taiwan Semiconductor (TSM) — IFNNY is supplied by: foundry capacity for advanced power/logic
• Analog Devices (ADI) — IFNNY competes with: partial analog overlap — Infineon (power) vs ADI (signal-chain/converters) compete mainly in power-management analog
• ON Semiconductor (ON) — IFNNY competes with: power semiconductors (SiC/GaN) head-to-head
• Texas Instruments (TXN) — IFNNY competes with: analog/power IC rivalry
• STMicroelectronics (STM) — IFNNY competes with: European power/analog leaders head-to-head
• Siemens (SIEGY) — IFNNY supplies: power semiconductors for drives/automation/electrification
• Microsoft (MSFT) — IFNNY supplies: power semis for Microsoft data-center power
• Meta Platforms (META) — IFNNY supplies: power for Meta
• Alphabet (GOOGL) — IFNNY supplies: power semis for GOOGL AI data centers
• Amazon (AMZN) — IFNNY supplies: power semis for AMZN AI data centers

Others in Analog, Logic & Mixed-Signal ICs

• Texas Instruments (TXN)
• Analog Devices (ADI)
• Monolithic Power Systems (MPWR)
• Microchip Technology (MCHP)
• ON Semiconductor (ON)
• NXP Semiconductors (NXPI)
• Lattice Semiconductor (LSCC)
• Qorvo (QRVO)
• STMicroelectronics (STM)
• Renesas Electronics (RNECY)

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