Who makes in-rack busbar & power whips for AI data centers
The high-current busbar and cabling that carries power from the rack's power shelves to each tray, including Nvidia's specified ±48 V / 1,400 A busbar used in rack-scale liquid-cooled systems.
Busbar and power whips are the last stretch of power distribution inside the rack, carrying current from the power shelves (4.12) to each tray's own board-level power delivery (4.08). A solid or laminated busbar running vertically through the rack, rather than a bundle of individual cables, is what rack-scale systems use to move very high current at the ±48 V level the taxonomy specifies for NVL72-class racks; a bundle of discrete power whips remains the more conventional approach outside that specific architecture. The shift toward busbar reflects how much current a fully populated GPU rack now needs to distribute internally — a level that individual cables handle poorly at scale. For investors, this is a component defined by its current-carrying and thermal-management engineering rather than by exotic materials, and the suppliers building to the Nvidia-spec busbar are working from a reference design that's likely to be revised with each rack generation, which keeps requalification a recurring event rather than a one-time qualification.
AI delta: Fully populated GPU racks need to move more current internally than a bundle of discrete cables handles well, which is why rack-scale systems increasingly use a solid busbar rather than conventional power whips.
Nvidia-spec ±48 V / 1,400 A busbar
Companies on this part (6)
| Company | Role | Ownership | Ticker | Price | 1d | Confidence | Note |
|---|---|---|---|---|---|---|---|
| Amphenol | manufacturer | public | APH | 74.09 USD | +1.4% | reported | |
| Bizlink | manufacturer | public | 3665.TW | 1875 TWD | -4.3% | reported | |
| Delta Electronics | manufacturer | public | 2308.TW | 1560 TWD | -3.4% | reported | |
| Eaton | manufacturer | public | ETN | 366 USD | -1.7% | reported | |
| Lite-On | manufacturer | public | 2301.TW | 256 TWD | -2.7% | reported | |
| Schneider Electric | manufacturer | public | SU.PA | 231 EUR | -1.4% | reported |
Who competes here
The same table read the other way: every company above competes for in-rack busbar & power whips sockets. Confidence tags matter — an inferred placement is a lead, not a confirmed rivalry.
Seen in real machines
in-rack busbar & power whips is named in 1 of the rack teardowns and supercomputer breakdowns on this site. Each line below is a piece of that machine. The companies shown are the ones named on that line, not necessarily the maker of this part.
- Nvidia GB300 NVL72 · rack teardown
- ±48 V / 1,400 A busbar — Eaton, Delta Electronics, Bizlink, Lite-On
Nearby parts
- Previous in layer: Chassis, rails, rack enclosures
- Next in layer: Rack PDUs
- Layer: Layer 4 — Servers, racks & integration
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- Google data center strategic sourcing exec heads to OpenAI — Data Center Dynamics, 2026-10-13Google's strategic sourcing executive is joining OpenAI to focus on high-speed interconnects and rack power infrastructure.
- AI racks approach megawatt power levels as SiC, GaN, silicon divide power delivery roles — DigiTimes, 2026-10-12The integration of Silicon Carbide (SiC) and Gallium Nitride (GaN) technologies is enabling power delivery systems to handle the megawatt-scale power requirements of modern AI racks.
- Modder 'fixes' melting RTX 5090 power connectors with custom distributor — Tom's Hardware, 2026-10-04A community modder developed a custom power distribution solution to address melting issues with the power connectors on the NVIDIA RTX 5090 GPU.
- Nvidia DLSS 5 power draw hits 647W as power connector runs hotter than the GPU die, upscales frame rates and flame temps on 16-pin — Tom's Hardware, 2026-09-25Testing revealed that the 16-pin power connector on the RTX 5090 reaches temperatures exceeding 90 degrees Celsius when the GPU draws near 650W.
- onsemi Embedded Power Platform Announced — ServeTheHome, 2026-09-16onsemi unveiled its new Embedded Power Platform designed for AI racks, automotive, and industrial uses.
- AI server exports to US slow; electronics parts jump 1.5 times in August — DigiTimes, 2026-09-13Taiwan reported that electronic parts exports reached a record high of $32.22 billion in August 2026, with integrated circuits and printed circuit boards seeing significant growth.
- STMicroelectronics ties AI data center carbon cuts to power design, not location — DigiTimes, 2026-09-10STMicroelectronics stated that achieving carbon neutrality in AI data centers is primarily dependent on internal rack-level power and cooling design, rather than the geographical location of the facility.
- Macronix boosts sustainability spending to NT$780 million — DigiTimes, 2026-09-02Macronix reported that it achieved significant reductions in greenhouse gas emissions and committed to investing NT$780 million in sustainability initiatives for 2025.
Questions about in-rack busbar & power whips
- What are in-rack busbar & power whips?
- The high-current busbar and cabling that carries power from the rack's power shelves to each tray, including Nvidia's specified ±48 V / 1,400 A busbar used in rack-scale liquid-cooled systems.
- Which companies make in-rack busbar & power whips for AI data centers?
- This catalog lists 6 companies on In-rack busbar & power whips, 6 of them with listed equity: Amphenol, Bizlink, Delta Electronics, Eaton, Lite-On, Schneider Electric.
- How does AI change demand for in-rack busbar & power whips?
- Fully populated GPU racks need to move more current internally than a bundle of discrete cables handles well, which is why rack-scale systems increasingly use a solid busbar rather than conventional power whips.
- How reliable are these in-rack busbar & power whips supplier placements?
- The 6 placements on this part break down as 6 reported. "disclosed" means the company or a filing says so; "reported" comes from trade press or a reference-design list; "inferred" is a taxonomy lead with no citation yet.
Sources: placements without a source URL come from the taxonomy seed and are tagged accordingly. How this data is built.· Markdown · JSON