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

−9.6%

% in uptrend

14%

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$1,240.0	−4.25%	−30.1%	−31.3%	+29.4%	−50.5%	2026-10-28
MPWR Monolithic Power Systems	Voltage regulation for accelerators	NASDAQ US	$1,447.4	−2.12%	+16.4%	+3.4%	+60.5%	−14.1%	2026-10-29
IFX.DE Infineon Technologies	SiC/GaN power semis for 800V DC racks	XETRA Germany	€52.11	−0.02%	−5.8%	−15.9%	+39.2%	−40.8%	2027-02-03
VICR Vicor	High-density power modules	NASDAQ US	$164.7	−2.03%	−32.9%	−29.8%	+50.3%	−56.6%	2026-10-20
NVTS Navitas Semiconductor	GaN power ICs for AI power supplies	NASDAQ US	$9.56	−5.06%	+2.2%	−33.8%	+33.9%	−69.9%	2026-11-03
ON onsemi	SiC power and image sensors	NASDAQ US	$73.73	+0.15%	+0.5%	−10.8%	+36.2%	−45.0%	2026-11-02
2301.TW Lite-On Technology	AI server power supplies and shelves	TWSE Taiwan	NT$228.0	−4.60%	−17.4%	−14.3%	+43.3%	−28.2%	2026-10-30

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