800V Rack Power (Power Shelves & PSUs)

100kW+ racks force 800V DC architectures, GaN/SiC conversion and new power shelves. Power density per rack is now a design constraint.

Power semis→PSU / shelf→Busbar→Rack

Tightness score ⓘ

#29 of 56

▲ Tightening

Supply concentration3

Lead time3

Capex intensity3

Geopolitical exposure3

Pricing power4

Lead time

6–12 mo

Theme 1M

−17.1%

% in uptrend

Metric to watch

800V DC rack adoption, power-shelf revenue, and GaN/SiC AI design wins.

What would prove us wrong

Weakens if rack densities stall and legacy 54V designs remain sufficient.

Dependencies

Equal-weight · rebased 100 · 1Y

Stocks we track

Who controls this bottleneck

Roles, not recommendations. Delayed prices; local currency.

Stock	Role	Listing	Last	1D	1M	3M	YTD	Off 52w high	Next earnings
2308.TW Delta Electronics	Power shelves and thermal for AI racks	TWSE Taiwan	NT$1,560.0	0.00%	−16.8%	−17.0%	+62.8%	−37.8%	2026-10-28
MPWR Monolithic Power Systems	Voltage regulation for accelerators	NASDAQ US	$1,171.6	+2.77%	−14.2%	−8.5%	+29.9%	−30.5%	2026-10-29
IFX.DE Infineon Technologies	SiC/GaN power semis for 800V DC racks	XETRA Germany	€50.20	+3.14%	−11.5%	−7.9%	+34.1%	−43.0%	2026-11-10
VICR Vicor	High-density power modules	NASDAQ US	$193.4	+9.84%	−31.4%	+0.7%	+76.4%	−49.1%	2026-10-20
NVTS Navitas Semiconductor	GaN power ICs for AI power supplies	NASDAQ US	$8.52	+1.61%	−30.2%	−14.9%	+19.3%	−73.2%	2026-11-03
ON onsemi	SiC power and image sensors	NASDAQ US	$74.15	+2.63%	−4.0%	−12.1%	+36.9%	−44.6%	2026-11-02
2301.TW Lite-On Technology	AI server power supplies and shelves	TWSE Taiwan	NT$255.5	0.00%	−11.4%	+18.3%	+60.5%	−19.5%	2026-10-28

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