Sourcing Standards
Our sourcing standards put four gates between a Shenzhen factory and your purchase order before volume ships.
Why sourcing standards matter
Guangdong computing-hardware factories are booked into next year, so availability is not a given—it has to be verified at the production-schedule level before a purchase order is placed. Without a documented vetting path, buyers face delays, substituted components, or certification gaps that surface only after freight lands.
DC Power treats sourcing standards as an inspection sequence, not a marketing promise. Each factory must pass document review, on-site audit, sample acceptance, and pilot-order performance before we route volume orders through Shenzhen.
Four gates
Document audit
We verify business licenses, export permits, and certification files, including UL 62368-1 for PDU/PSU, UL 857 for busway, and UN38.3 for battery shipping.
Factory audit
Auditors walk the floor to confirm booked capacity, line setup, and whether the plant can hold tolerances for high-current connectors such as C13 10A, C19 16A, and C21 16A hot condition.
Sample + acceptance
Samples are tested against the specification before approval. Billing-grade PDU metering must read within ±1%, and busway samples must align with IEC 61439-6 type-tested ratings up to 6300 A.
Pilot then volume
A small pilot order is released first. Only after the pilot passes inspection and tariff routing review do we move to volume, helping to block surprises like the 46.6% US tariff on Chinese dry-type transformers.
Acceptance criteria
| Checkpoint | Requirement |
|---|---|
| PDU / PSU safety | UL 62368-1 evidence, current file and model range |
| Busway certification | IEC 61439-6 type tested; UL 857 where specified |
| BBU battery compliance | UL 1973 + UL 9540A test data; UN38.3 for Class 9 sea freight |
| Billing metering | ±1% accuracy or better on switched and metered PDU families |
| Connector ratings | C13 10A, C19 16A, C21 16A hot condition |
| Capacity check | Confirmed slot at Guangdong computing-hardware factories booked into next year |
| Pilot order terms | PDU MOQ 10–100 pcs, 15–30 day lead time; BBU MOQ 50+ |
| Tariff routing | HS code check against current rates, e.g. dry-type transformers 46.6%, some lines +125% |
What inspectors check
Inspection stations focus on build quality that matters for AI and colocation power: proper torque marks, correct silkscreen, connector retention, and clean separation of high-current paths. A single weak connection can cascade in high-density racks that now cross 120 kW per cabinet.
Every inspector follows a checklist tied to the order, not a generic walkthrough. That includes the 48V ORv3 architecture for GPU trays and server power supplies such as the HPE 3200W M-CRPS Titanium unit with 96% efficiency at half load.
- Rack PDU load ratings up to 22 kW on switched PDU families such as Server Technology PRO4X class 24xC13 + 24xC19 HDOT
- Busway systems up to 6300 A tested to IEC 61439-6, with busbar copper supply tied to AI server demand
- PSU efficiency at 80 PLUS Titanium levels—96% at half load on 3200W M-CRPS units
- 48V Open Rack V3 battery shelf spec Rev 1.1, with UL 1973 and UL 9540A documentation
- CDU cooling capacity from 300 kW to 1.2 MW per unit for liquid-cooled AI deployments
Closing word
“We do not sell a factory before it passes the same four gates we would use for our own inventory—document audit, floor audit, sample acceptance, and pilot order.”
