ISO 9001:2015 & SGS Verified OEM/ODM Factory

OEM/ODM Constant Voltage Power Supply Manufacturer & Factories

Engineered industrial SMPS, high-efficiency DC-DC step-up/down modules, pure sine wave inverters, and telecom rectifiers built for mission-critical reliability.

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23+
Years Manufacturing (Since 2003)
10+
Dedicated SMT & Assembly Lines
1,229m²
SGS Verified Factory Workshop
100%
Full-Load Burn-in & Hi-Pot Tested
98.2%
Direct Response & On-Time Delivery
USAHub
Overseas Warehouse Rapid Stock
Factory Verification & E-E-A-T Authority

Industrial Manufacturing Capabilities & OEM/ODM Governance

Established in 2003, Varnix Technology Co., Ltd. operates a vertically integrated power supply manufacturing complex in Guangdong, China. From surface-mount PCB assembly to high-voltage isolation impregnation and 100% full-load burn-in screening, our engineering guarantees zero field downtime.

Custom Voltage & Topology Engineering

We configure discrete constant voltage outputs from 3.3VDC, 5VDC, 12VDC, 24VDC, 48VDC up to 600VDC custom industrial rails. Our topology library spans active clamp forward, half-bridge LLC resonance, interleaved buck-boost, and synchronous flyback converters designed for maximum thermal dissipation.

Harsh Environment Enclosure & Ingress

Industrial systems encounter salt spray, moisture, dust ingress, and vehicular mechanical vibration. Varnix provides custom CNC extruded aluminum chassis, IP67 and IP68 thermally conductive silicone vacuum potting, conformal polyurethane coating (IPC-CC-830B compliant), and M12/Anderson quick-disconnect terminal integrations.

Rigorous Full-Load Aging & Quality Audit

Every single manufactured unit undergoes a 5-step quality verification cycle: Automated Optical Inspection (AOI) for SMD soldering, dynamic in-circuit testing, dielectric withstand hi-pot insulation checks (1.5kVAC to 3kVAC), 4-to-12 hour elevated temperature (50°C) burn-in aging, and ripple/noise spectrum analysis under full resistive/capacitive loads.

Turnkey OEM/ODM Partnership

From Proof-of-Concept to Tier-1 Mass Assembly

Whether you require white-label branding on catalog models with low MOQs (from 1 to 10 units) or ground-up ODM electrical design spanning custom magnetic core winding, thermal modeling, PCB gerber optimization, and firmware customization (CANbus, MODBUS-RTU, PMBus, RS485 telemetry), Varnix provides end-to-end engineering documentation and rapid 15-day prototype turnaround.

ISO 9001:2015 certified quality management
CE, RoHS & FCC certified series with DoC
SGS Onsite Verified production floor & capacity
US Warehouse Stock for rapid North America delivery

Request Direct Factory Collaboration

Direct engineering consultation for procurement officers, electrical engineers, and hardware project managers. We respond with formal DFM analysis within 24 hours.

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Technical Engineering Guide

Constant Voltage Topology Selection & Component Longevity

Selecting the appropriate SMPS circuit topology directly impacts Mean Time Between Failures (MTBF), electromagnetic compatibility (CISPR 32 / EN 55032 Class B), total power dissipation, and acoustic resonance across wide operating temperature bands (-40°C to +85°C).

Converter Topology Power Range Efficiency Galvanic Isolation Key Strengths Typical Industrial Target Application
Synchronous Buck Regulator 15W – 600W 94% – 97.5% Non-Isolated Highest power density, lowest component count, minimum heat dissipation. Heavy truck 24V-to-12V cab power, golf carts, marine accessory step-down.
Isolated Flyback (Active Clamp) 10W – 180W 88% – 92% 1.5kV – 3kV AC Low cost, excellent cross-regulation, broad DC input windows (up to 4:1). Auxiliary bias supplies, telemetry sensors, industrial automation PLCs.
LLC Resonant Half-Bridge 200W – 3000W 93% – 96% 3kV – 4.2kV AC Zero Voltage Switching (ZVS), ultra-low EMI, virtually zero switching loss. Telecom rack rectifiers, base station repeaters, high-wattage battery chargers.
Interleaved Boost / Buck-Boost 100W – 1500W 92% – 95% Custom Options Input ripple current cancellation, reduced capacitor ESR stress. Automotive dual-battery systems (12V-to-24V / 48V micro-hybrid buses).
Phase-Shifted Full-Bridge (PSFB) 1.5kW – 15kW+ 94% – 96.8% 3.5kV AC High power handling, manageable voltage overshoot, high dynamic load response. Industrial electroplating rectifiers, anodizing plants, central DC microgrids.
Critical Specifier Warning: Voltage Derating Curves vs. Ambient Thermal Enclosure
Industrial procurement specifications frequently overlook ambient enclosure derating. While a constant voltage power supply may operate at 100% rated capacity up to 50°C ambient in free air, unventilated NEMA 4X or IP67 sealed junction boxes experience internal heat buildup that can quickly exceed 70°C. At Varnix, our engineers specify 105°C to 125°C solid-state aluminum electrolytic capacitors (Japanese Rubycon/Nichicon or equivalent certified automotive-grade long-life tiers) and design custom aluminum heatsink extrusion profiles with thermal interface pads (> 3.0 W/m-K) to ensure safe, continuous operation without premature thermal throttling.
Frequently Asked Questions

B2B Procurement, Engineering & Factory Verification FAQ

Clear, direct answers regarding custom design capabilities, international testing certifications, MOQ terms, warranty policies, and global supply logistics.

Is Varnix an authentic manufacturer or a trading agent?
Varnix Technology Co., Ltd. is an authentic power conversion manufacturer founded in 2003 with its primary facility in Guangdong, China. Our 1,229 m² production facility, assembly lines, hi-pot testing benches, elevated-temperature burn-in chambers, and export engineering team are verified onsite by SGS. All clients are welcome to perform live video facility inspections or third-party audits.
What is your Minimum Order Quantity (MOQ) for OEM/ODM?
For standard catalog configurations of constant voltage DC-DC converters, rectifiers, and pure sine wave inverters, the MOQ begins at just 1 to 10 units to support bench prototyping. For custom ODM builds—including modified voltage rails, custom wire harnesses, specialized aluminum extrusion profiles, and laser-engraved client branding—MOQs typically begin at 50 to 100 units depending on chassis tooling requirements.
How does your factory handle ripple, noise, and EMC compliance?
All constant voltage supplies are designed to comply with EN 55032 / CISPR 32 Class B limits. We implement multi-stage differential and common-mode LC filters at both input and output terminals. Peak-to-peak output voltage ripple is maintained strictly below 50mVp-p to 100mVp-p (tested via 20MHz oscilloscope bandwidth with 0.1μF ceramic and 10μF electrolytic bypass termination).
What certifications are provided for international customs clearance?
Our quality management system is certified to ISO 9001:2015. Our constant voltage product series carry full CE (LVD/EMC), RoHS, and FCC compliance certificates accompanied by complete test reports from accredited laboratories. We supply comprehensive Declaration of Conformity (DoC) paperwork to ensure rapid customs transit into North American, European, and Australasian jurisdictions.
What shipping terms, trade currencies, and incoterms do you accept?
We accommodate worldwide shipping under FOB, CFR, CIF, EXW, FCA, CPT, DDP, and DDU incoterms via sea freight, air cargo, and international express couriers (DHL, FedEx, UPS). Fast-moving DC-DC converters can be dispatched directly from our US overseas warehouse. We settle transactions in 8 global currencies via T/T, L/C, PayPal, or secure trade escrow.
What is your warranty resolution procedure for field defects?
Every production batch is covered by formal written warranty terms (typically 24 to 36 months). Our dedicated engineering support desk maintains a 98.2% response rate within 24 hours. In the rare event of a confirmed manufacturing defect, claims are resolved swiftly per contract through immediate component/unit replacement shipments or commercial credits.

Accelerate Your Power Supply Program with Varnix Factory Engineering

Submit your input/output voltage parameters, continuous load ratings, dimensional envelope, and target compliance standards. Our engineering team delivers schematic proposals, thermal simulations, and quotation packages within 24 hours.

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