A leading power electronics manufacturer needed compact enclosures for power modules, circuit boards and wiring that would hold up on the factory floor and in control rooms alike. We delivered 350 IP54-rated power boxes with tuned ventilation and FEA-optimized internal structure.
Precision-engineered power box enclosures built to your exact specifications
From initial concept to final delivery –every detail of this custom fabrication project
Industrial automation and power distribution systems keep growing in power density, which makes the enclosure as important as the electronics inside. In 2026, a leading power electronics manufacturer commissioned a custom power box line to house its latest generation of power modules, PCBs and wiring harnesses.
The boxes would live on factory floors, in control rooms and inside machine frames, so they had to shed heat, keep dust out and stay compact enough for space-constrained retrofits.
The customer’s previous supplier could not meet three core needs:
Connector alignment was another pain point –mismatched holes meant the customer’s wiring harnesses had to be reworked on site.
Our team focused on four technical challenges:
We built the housing from 1.0mm cold-rolled galvanized steel, then added a multi-layer ventilation system with precision-punched slots on the top cover and front panel, plus removable dust filters that operators can service without special tools.
The 350-unit order shipped 4 days ahead of the 30-day schedule with a 100% pass rate on every dimensional, IP54, thermal and connector-fit test.
SanJun Hardware solved the overheating and connector-fit problems that two previous suppliers could not. The enclosures are compact, look professional, and every unit in the batch lines up exactly. We have signed a two-year exclusive supply agreement for our full power box line.
Eight reasons global brands partner with SanJun Hardware for precision sheet metal fabrication
Quality-managed production with documented processes and full traceability at every stage.
Streamlined scheduling and capacity planning ensure your orders ship when promised.
Expert design-for-manufacturing review at no cost –optimize your design before production.
Sheet metal ±0.1mm and CNC machining ±0.01mm –consistent accuracy across every batch.
From laser cutting and bending to welding, coating and assembly –all under one roof.
CMM inspection, coating adhesion tests, and 100% final inspection before every shipment.
Prototypes from 1 unit to production runs of 10,000+ –scalable capacity to match your needs.
Work directly with our engineering team –fast responses, clear updates, no middlemen.
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