AI Power
The 800VDC Datacenter Trade
AI racks need higher-voltage power. The stock question is who gains content per megawatt.
27 May 2026 · YK Research
Contents
The Mispricing
Look for companies where 800VDC increases content per megawatt and where consensus has not yet modeled the mix shift.
Why 800VDC Happens
Physics
At 600kW per rack, 48-54V means huge current, heavy copper, heat, and routing problems. Higher voltage cuts current and makes dense racks practical.
Economics
The goal is lower cost per token. Dense racks keep more traffic inside fast scale-up links. That needs much more power per rack.
Architecture
Early deployments add sidecar power racks. Later sites move 800VDC distribution upstream and replace more of the old AC stack.
Stock Selection
The likely winners gain revenue per MW as the electrical architecture changes.
Stocks That Benefit
The most direct US-listed exposure. Vertiv sells datacenter power and thermal systems. It should benefit if sidecar power racks, high-density power shelves, and cooling complexity keep growing.
Strong fit for switchgear, breakers, power distribution, and DC protection. The Resilient Power acquisition also gives Eaton a path into solid-state transformer technology.
Large datacenter electrical supplier. It can lose some legacy UPS content but win if it owns the replacement stack: DC distribution, power management, controls, and services.
Good exposure to electrification, DC breakers, switchgear, and SST ecosystems. The article also points to ABB-backed DG Matrix as an important SST player.
One of the more direct equipment plays. Delta shows up in rectifiers, power shelves, busway programs, and cooling distribution units for high-density datacenters.
Benefits from SiC, GaN, battery backup conversion, and high-voltage power electronics. If 800VDC scales, the semiconductor layer becomes more valuable.
High-voltage connectors, cables, sensors, and EV-grade component overlap. Less pure, but the architecture needs more specialized interconnect hardware.
Similar logic to TE. High-voltage cabling and connector content should rise as racks move to 800VDC and cable-based power links replace some busbar designs.
These are more indirect. They benefit if DC busway, enclosures, protection, and facility electrical products become larger categories.
A specialized exposure. The article highlights LS Electric's UL-certified 1500V DC molded case breaker for datacenter applications.
Indirect beneficiary. 800VDC systems need specialized manufacturing, validation, safety, and rack-level integration.
Not an 800VDC hardware play. It benefits from the grid, interconnection, and construction complexity around AI datacenters.
Stocks That Do Not Benefit
The obvious losers are not easy to isolate because the large incumbents sell both the old stack and the new stack. Eaton, Schneider, ABB, and Vertiv can lose legacy UPS dollars and still win more back in DC hardware.
- UPS-only suppliers: Phase 2 starts reducing centralized UPS equipment. Suppliers limited to that product face a threat from 800VDC.
- 48V-only rack power: Low-voltage distribution becomes less attractive as rack density rises. Board-level conversion remains, but the old layer shrinks.
- AC-only busway: Facility-level 800VDC needs DC-rated busway and protection. AC-only suppliers need a credible DC roadmap.
- Conventional transformers without SST path: Solid-state transformers can remove low-voltage transformers and rectifiers over time.
- Generator-heavy backup: Batteries, supercapacitors, and BESS can reduce some backup-generator dependence over time. This remains a longer-term possibility.
The Trap
This is why the trade is subtle. 800VDC is a mix shift first. Total electrical content per MW may not collapse. Spending shifts between products and suppliers.
My Ranking
Most direct
- VRT
- 2308.TW Delta Electronics
- ETN
- Schneider Electric
- ABB
- Infineon
- TE Connectivity / Amphenol
Good, but less direct
- Hubbell
- nVent
- Legrand
- LS Electric
- Flex
- Quanta Services
Relevant, but risky
- Wolfspeed has relevant SiC technology, but the equity has execution and balance-sheet risk.
- Private SST names matter: DG Matrix, Novos Power, Heron Power, Amperesand.
What Breaks the Thesis
- Adoption delay: 800VDC remains stuck in hyperscaler pilots because safety codes, UL certification, and local approvals move slowly.
- Valuation: VRT, ETN, Schneider, ABB, and power-infra baskets may already price in too much AI capex growth.
- Standards fragmentation: ±400V, monopolar 800V, grounding choices, and vendor-specific designs can slow multi-vendor scaling.
- Capex slowdown: If hyperscalers slow AI datacenter orders, every supplier in the chain gets hit.
How I Would Track It
- Hyperscaler references to 800VDC-native racks and facilities.
- OCP Diablo 400 supplier announcements and multi-vendor interoperability tests.
- UL certification for DC breakers, busway, and SSTs.
- Backlog / book-to-bill commentary from VRT, ETN, Schneider, ABB, Delta, and Infineon.
- Whether AI power names gain content per MW or only benefit from broader capex growth.