China Wholesale Power Supply Module Factories & Factory in the Boston Market

All Varnix industrial power supplies and DC-DC converters are engineered with comprehensive EMI input filtering (pi-filters, common-mode chokes) designed to satisfy FCC Part 15 Subpart B, Class B conducted and radiated emission limits. While discrete components generally operate as recognized sub-assemblies, our engineering department provides full schematic test documentation, bill-of-materials declarations, and dielectric withstand reports to accelerate your system-level UL 62368-1, UL 508A, or CSA certifications.

Yes. We maintain safety inventory of our standard DC-DC buck, boost, and pure sine wave inverters in our US overseas logistics hub, enabling domestic dispatch via FedEx or UPS Ground directly to your facility in Cambridge, Waltham, or Framingham within 2 to 4 business days. For custom voltage and modified enclosure prototypes, our rapid-turn manufacturing line delivers air-shipped functional samples within 10 to 14 business days.

Unlike large domestic conglomerates that demand 10,000-unit commitments for firmware or voltage tweaks, Varnix provides agile support for emerging hardware innovators. Standard catalog models have an MOQ of just 1 to 10 units. Custom voltage calibrations, specialized harness pinning, and private-label branding typically require an MOQ starting at 50 to 100 units, making it accessible for Pilot Runs and New Product Introduction (NPI) phases.

We provide comprehensive Incoterms including EXW, FOB Shenzhen/Guangzhou, CIF Boston, and full DDP (Delivered Duty Paid). Under DDP terms, our freight forwarding partners handle export customs, ocean/air documentation, customs clearance at the Port of Boston or Logan International Airport, and settlement of import duties/tariffs directly, delivering cleared cargo straight to your warehouse or dock doors.

Our multi-tier quality assurance protocol mandates that 100% of manufactured units pass our computerized automatic test equipment (ATE) checking voltage calibration, regulation tolerances, ripple thresholds, and short-circuit response. Crucially, all production batches are routed through elevated-temperature burn-in chambers under continuous 100% resistive load for 4 to 8 hours to weed out marginal semiconductor switches or passives prior to ultrasonic cleaning and final packaging.

For sealed outdoor enclosures (NEMA 4X / IP66) common in New England municipal telematics and marine monitoring, we recommend our potted aluminum-shell series. These modules utilize thermally conductive potting resin (thermal conductivity >1.5 W/m•K) that transfers internal heat directly to the outer ribbed casing while protecting components against ambient moisture, freeze-thaw condensation, and mechanical shock. Automatic over-temperature shutdown circuitry triggers at +85°C internal junction temperature, auto-recovering once temperatures normalize.