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An open high-density server rack seen from the rear in a bright data hall, with stainless liquid-cooling manifolds and dry-break couplings in parallel vertical runs

Network · Group A of five · 7 of 24 sites · verified 2026-09-13

Group A —
data centre and compute
infrastructure: seven sites.

Seven sites, one object: the AI rack. Conversion, distribution, continuity and the physical envelope, each built by a different member.

Send us your rack spec The full 24-site register
Group A
7
Supplier sites in this capability group, of 24 in the network
Share of network
7/24
The largest group in the network — Group E is the smallest at 2 of 24
List ISO 9001
3/7
Counted over this group's own members, not the network total
List RoHS
7/7
Read from each member's own published certification list
List CE
6/7
Six of the seven list CE; DryLink publishes OCP UQD compliance instead

01Group A · identity

Four layers of one rack. No member covers all four.

7 of 24 sites4 layersLargest group

Conversion, distribution, continuity and envelope — the interfaces between them are where a multi-site order needs one contract.

A rack BBU shelf, a supercapacitor module, a CRPS module, a vertical PDU and a UQD manifold plate staged in one row
Fig. 01One rack, four layers. Every object in this frame is made by a different Group A member.
A finished CRPS server power supply module with a perforated intake face and a gold edge connector L1

Power conversion

CRPS 550 W–5.5 kW 80 PLUS Titanium class

TitanWatt · 96% peak efficiency at 50% load

A finished 1U rack power distribution unit beside a rack-mounted DC power shelf L2

Power distribution

Rack PDU Busway 250–800 A

AmpRack · 36 kW from one 63 A three-phase PDU

A finished 2U rack battery backup unit with a perforated front grille and heavy DC terminals L3

Power continuity

BBU 5.12 kWh / 3U 1–50 ms transient tier

VoltBridge · CapStack · sub-millisecond bridge

A finished 48U AI server rack with its door open, filled with identical closed 1U units L4

Physical envelope

Racks 42U–52U OCP UQD Cold aisle

RackForge · DryLink · 132 kW per cabinet

Buyers arrive from a 10–16 A per-outlet hall being retrofitted, or from a greenfield high-density hallBoth start at the same table

02Group A · the members

Seven members, their families and their numbers.

7 sitesFamilies & numbersOutbound links open the site

Every figure below is published by the site that carries it. Nothing on this page is a network average.

A data-hall row of closed racks and slim power shelves receding down a wide aisle
Fig. 02Group A — Data centre & compute infrastructure. 7 independently operated sites, each with its own published numbers.
A finished busway run with three tap-off boxes and rotary breaker handles, suspended on brackets
Fig. 032,000 A under UL 857 and 2,500 A under IEC 61439-6 — a busway rating, published by the member that builds it.
A finished busway run with three tap-off boxes and rotary breaker handles, suspended on brackets A-01

VoltFab

AI data centre power system EMS — rack PDU, BBU, supercapacitor modules, CRPS server PSU and busway built and burn-in tested under one quality system.

Rack PDU BBU Battery Backup Supercapacitor Modules CRPS Server PSU Data Center Busway Integrated Rack Power
142 kW per-rack power ceiling 96% Titanium efficiency 48 h RFQ feedback

Group A · Data centre & compute

A finished CRPS server power supply module with a perforated intake face and a gold edge connector A-02

TitanWatt

Titanium-class CRPS and M-CRPS server power supplies, 550 W to 5.5 kW, engineered toward GPU power and power shelf systems.

CRPS 550–1300 W CRPS 1600–2400 W M-CRPS 3000–5500 W GPU Power Solutions Power Shelf 33 kW roadmap
96% peak efficiency at 50% load 550 W to 5.5 kW ladder MTBF above 250k h at 40 °C

Group A · Data centre & compute

A finished 2U rack battery backup unit with a perforated front grille and heavy DC terminals A-03

VoltBridge

BBU battery backup units that bridge power excursions in milliseconds — rack shelves, in-server modules and ±400 V shelves for GB300-class compute.

Rack BBU Shelf 5.12 kWh (VB-5125) In-server BBU (VB-E3) HV BBU Shelf, 800 VDC ready (VB-H400)
5.12 kWh per 3U shelf <1 ms bridge-to-battery 6,000 cycle class at 25 °C

Group A · Data centre & compute

A finished 1U rack power distribution unit beside a rack-mounted DC power shelf A-04

AmpRack

Intelligent rack PDUs engineered on their own PCBA line — metered, switched and per-outlet monitored power for data centres and critical racks.

Metered PDU Switched PDU Outlet-Metered PDU AI Rack Power
±1% billing-grade metering 36 kW from one 63 A three-phase WYE PDU 100k relay cycles per outlet

Group A · Data centre & compute

A finished 48 V supercapacitor module with four cells in a machined cradle and copper busbar terminals A-05

CapStack

LIC hybrid supercapacitor modules for AI server backup and industrial ride-through — laser-welded, capacity-sorted, test-reported.

48 V AI Rack Backup (RackBridge 48V) PSU / 16 V Pack High-Voltage 125–182 V Low-Voltage 12/24 V Custom & ODM 16–108 V
1–50 ms transient tier 500k+ cycle class at 3.5 V −40 °C cold start

Group A · Data centre & compute

A finished 48U AI server rack with its door open, filled with identical closed 1U units A-06

RackForge

AI racks and cold aisle containment forged on their own sheet metal line — busbar and liquid-cooling provisions pre-installed before the container ships.

Standard Racks 600/800 mm, 42U–52U GPU High-Density 40–132 kW Liquid-Cooling Ready Cold Aisle Containment Busway-Integrated 250–800 A Sheet Metal OEM
132 kW per cabinet 1,600 kg static load at 4× safety factor MOQ 5 units, 30 days FOB

Group A · Data centre & compute

A finished coolant distribution unit with two quick-disconnect hose ports and a copper cold plate A-07

DryLink

OCP-compliant UQD quick disconnects and rack manifolds, machined in-house and helium-tested one by one.

UQDB Blind-Mate Sets UQ04 Hand-Push Sets Rack Manifolds CDU & Custom Manifolds OCP UQD02/04/06/08
±0.01 mm valve-seat tolerance 100% helium leak tested 5,000× mate cycles

Group A · Data centre & compute

03Group A · published standards, member by member

Counted over Group A's own seven members.

3 / 7 ISO 90017 / 7 RoHS6 / 7 CE0 publish none

3 of 7 list ISO 9001 · 7 of 7 list RoHS · 6 of 7 list CE · 0 of 7 publish nothing. DryLink is the CE exception.

A finished busway run with three tap-off boxes and rotary breaker handles, suspended on brackets A-01

VoltFab

RoHS CE
UL 62368-1 UL 1973 UL 9540A UL 857 IEC 61439-6 80 PLUS Titanium CE UKCA RoHS UN38.3
A finished CRPS server power supply module with a perforated intake face and a gold edge connector A-02

TitanWatt

RoHS CE
IEC/UL/EN 62368-1 with CB scheme CE UKCA FCC Part 15 Subpart B RoHS REACH
A finished 2U rack battery backup unit with a perforated front grille and heavy DC terminals A-03

VoltBridge

RoHS CE
UN 38.3 tested IEC 62619 CE + EU 2023/1542 RoHS REACH UL 1973 / UL 9540A path via accredited labs
A finished 1U rack power distribution unit beside a rack-mounted DC power shelf A-04

AmpRack

ISO 9001 RoHS CE
UL 62368-1 IEC 60309 CE UKCA RoHS/REACH FCC Part 15 A ISO 9001 IEC 62053-21
A finished 48 V supercapacitor module with four cells in a machined cradle and copper busbar terminals A-05

CapStack

RoHS CE
UL 810A cell route IEC 62391 methods RoHS / REACH / WEEE CE DoC UN 3499 shipping docs
A finished 48U AI server rack with its door open, filled with identical closed 1U units A-06

RackForge

ISO 9001 RoHS CE
ISO 9001 CE RoHS EIA-310-E IEC 60297 GR-63 Zone 4 optional
A finished coolant distribution unit with two quick-disconnect hose ports and a copper cold plate A-07

DryLink

ISO 9001 RoHS
OCP UQD interface compliance ISO 9001 RoHS REACH ISO 4406 cleanliness
Safety is not EMCIEC 62368-1 governs product safety, not electromagnetic compatibility. A CB certificate is an input to national approvals, never the approval itself.
CE is a declarationOn these products CE is the manufacturer's declaration against the applicable directives — not a third-party certificate, and not transferable between markets.
Codes, never holdersThe register prints standard codes only. No certificate holder name or certificate number appears on this site.
A finished coolant distribution unit with two quick-disconnect hose ports and a copper cold plate
Fig. 10Scope is the real claim. DryLink publishes OCP UQD interface compliance, ISO 9001, RoHS, REACH and ISO 4406 cleanliness — and no CE.
A finished 48 V supercapacitor module with four cells in a machined cradle and copper busbar terminals
Fig. 11One documented method. CapStack names IEC 62391 test methods and a UL 810A cell route rather than a single badge.

04Group A · where these products are catalogued

Where Group A's products are catalogued.

1 category7 sites behind it

All seven members feed one orderable category. The category page carries the ranges a procurement engineer shortlists on.

A finished 48U AI server rack, door open, filled with identical closed 1U units and teal power lines CAT-01

Data-centre & rack power

Rack PDU CRPS 550 W–5.5 kW BBU 5.12 kWh / 3U

Made by VoltFab · TitanWatt · VoltBridge · AmpRack · CapStack · RackForge · DryLink

A rack BBU shelf, a supercapacitor module, a CRPS module, a vertical PDU and a UQD manifold plate staged in one row
Fig. 12All seven members feed one category. The category page carries the ranges a procurement engineer shortlists on.

05Questions Group A buyers ask

Four questions Group A buyers ask.

4 questionsOne contract
Q1 Can I get the PSU, the PDU, the BBU and the rack from one place? Yes — from four different members under one contract, with one set of export documents and one inspection schedule.
Q2 Do you build the CDU? No. Group A covers the rack, the manifolds and the UQD connections. Facility-level coolant distribution sits outside this group and we say so.
Q3 Is the 800 VDC roadmap covered? VoltBridge publishes an 800 VDC-ready HV shelf. Treat it as a roadmap item, not a shipping configuration, until the site confirms it on your order.
Q4 Who is responsible if the rack and the PDU do not fit? We are. That is the reason a buyer takes the group through one contract instead of four separate purchase orders.
A data-hall row of closed racks and slim power shelves receding down a wide aisle
Fig. 13The group's decision axis is the rack power ceiling — 36 kW at the PDU, 132 kW at the cabinet, 142 kW at the power system.
A finished 48 V supercapacitor module with four cells in a machined cradle and copper busbar terminals
Fig. 14Two continuity tiers. VoltBridge bridges below 1 ms for seconds-scale events; CapStack rides through 1–50 ms transients.
A close view down one SMT line, with pick-and-place heads and feeder reels in strict alignment
Fig. 15Every member here builds its own board — PDU, BBU and supercapacitor lines run their own SMT and test.
A data-hall row of closed racks and slim power shelves receding down a wide aisle
Fig. 16The retrofitted hall and the greenfield hall arrive at the same table, and both start with the rack power ceiling.
A close macro view of an impedance-controlled board cut edge under laboratory light, held in a plain black fixture
Fig. 17An interface question is an engineering question. Rack, PDU, BBU and cooling loop are checked against one drawing.
Related The 24-site register Data-centre & rack power Data centre & AI infrastructure Technical assessment Group B — new energy

06Start

Send us your rack spec — power, cooling and dimensions.

Give us the rack power ceiling, the unit height and the cooling loop. We will say which members fit.

Recorded. An engineer will reply.

Written technical assessment, from eric@dfshk.cn.

Book a factory visit eric@dfshk.cn · +86 152 3512 7440