ISO 9001:2015 & SGS On-Site Verified OEM/ODM Facility

CE Certified High Voltage Power Supply Factory & Supplier

Delivering high-efficiency AC/DC single-output switching power supplies (15W to 3000W) engineered for industrial automation, telecom base stations, dielectric testing, medical electronics, and severe operating environments.

Production Catalog

High-Efficiency Industrial Switching Power Supplies

Explore our standard CE, RoHS, and FCC certified industrial SMPS lineup. Built with 100% full-load burn-in testing, multi-rail galvanic isolation, and active surge suppression circuits to safeguard your downstream loads.

10,000m²
Dedicated Factory Floor Space
19+
Years Power Electronics Engineering
10+
Automated SMT & Wave Lines
100%
Full-Load Burn-In Qualification
Engineering Whitepaper

High Voltage SMPS Architecture & Dielectric Safety Standards

A technical treatise for electrical architects, component engineers, and procurement directors evaluating power conversion topologies, thermal derating calculations, and European harmonized safety requirements.

Resonant Conversion Topologies (LLC & ZVS)

For high-voltage and kilowatt-class switching systems (e.g., S-1200 and S-1500 families), standard hard-switching topologies generate severe parasitic ringing, excessive dv/dt stress, and thermal hotspots that degrade switching MOSFETs.

Our engineering architecture implements Half-Bridge and Full-Bridge LLC Resonant converters with Zero Voltage Switching (ZVS). By synchronizing the gate turn-on event precisely when drain-source voltage crosses zero, switching losses decrease by up to 68%, pushing system efficiency up to 92.5% and mitigating electromagnetic interference at the source.

  • Magnetizing inductance integration inside high-Q planars
  • Soft commutation minimizing reverse recovery of body diodes
  • Active ripple attenuation maintaining P-P noise under 1.0%

CE Isolation, Creepage & Clearance (IEC 62368-1)

Compliance with the European Union Low Voltage Directive (LVD 2014/35/EU) requires rigorous adherence to harmonized safety standard EN IEC 62368-1 (Hazard-Based Safety Engineering). High-voltage secondary outputs impose strict galvanic boundaries.

Our PCB trace layout calculates reinforced insulation criteria based on working voltages, pollution degree 2, and material group IIIa. Optical isolation feedback loops utilize high-CMR optocouplers rated for 5,000Vrms isolation, with dedicated isolation trenches milled across high-voltage split planes to prevent tracking degradation.

  • Minimum 6.4mm clearance and 8.0mm creepage on primary-to-secondary
  • Solid potting dielectric fill on outdoor and high-voltage modules
  • Hi-Pot production test: 3,000VAC I/P to O/P for 60 seconds

Thermal Modeling & MTBF Reliability Engineering

Thermal fatigue remains the dominant driver of industrial power supply field failures. The service life of an electrolytic reservoir capacitor halves for every 10°C rise in operating temperature (Arrhenius rate law).

We apply thermal dissipation modeling to position critical electrolytic capacitors away from power semiconductor heat sinks. Using components exclusively rated for 105°C continuous operation and low equivalent series resistance (ESR), our MTBF calculations exceed 350,000 hours calculated under Telcordia SR-332 / MIL-HDBK-217F conditions.

  • Calculated derating starting at 50°C ambient with linear drop to 50% load at 70°C
  • Dual-ball-bearing brushless fan featuring stall-detection telemetry
  • Auto-recovery thermal limiters embedded directly inside inductive cores
Series Category Rated Power Available Output Voltage Isolation (I/P-O/P) EMC Standard (EU) Thermal Strategy Procurement Lead Time
Micro Enclosed (S-15) 15W 5V, 12V, 15V, 24V DC 3.0 kVAC / 1 min EN 55032 Class B Free-air convection In Stock / 7 Days
Mid Industrial (S-120 / S-145) 120W – 145W 12V, 24V, 36V, 48V DC 3.0 kVAC / 1 min EN 55032 / EN 61000-3-2 Perforated mesh convection 10 - 14 Days
Medium Heavy (S-200) 200W 24V, 36V, 48V DC 3.0 kVAC / 1 min EN 55032 / EN 61000-4-5 Free-air natural cooling 14 - 20 Days
Kilowatt Class (S-1200 / S-1500) 1200W – 1500W 24V, 48V, 72V, 110V DC 3.75 kVAC Reinforced EN 61000-6-2 / EN 61000-6-4 Dual temp-sensing DC fans 15 - 25 Days
Industry Horizon 2025–2030

Strategic Trends Shaping Industrial Power Supply Procurement

Anticipate technology transitions, carbon regulations, and hardware roadmaps to safeguard your supply chain against premature component obsolescence and regulatory non-compliance.

Technology Shift

Wide-Bandgap (SiC & GaN) Commercialization

Silicon Carbide (SiC) MOSFETs and Gallium Nitride (GaN) HEMTs are replacing traditional Silicon Superjunction devices in high-power AC/DC converters. SiC devices allow switching frequencies beyond 200kHz with near-negligible reverse recovery charge (Qrr), enabling engineers to reduce magnetic transformer volumes by 40% while achieving 80 PLUS Titanium-grade efficiencies (>94%). Procurement teams must prepare for higher upfront component costs offset by dramatic thermal savings and reduced enclosure sizes.

Control Interface

Digital Power Telemetry (PMBus & CANopen)

Analog-only feedback loops are giving way to digital signal processors (DSP) that execute software-defined control algorithms. Industrial automated lines require real-time reporting of output rail current, input AC line sag events, thermal sensor readouts, and total operating hours. Future procurement RFQs will mandate standard digital bus protocols (such as PMBus v1.3 or industrial CANopen) to support predictive maintenance and reduce factory downtime in smart Industry 4.0 facilities.

Regulatory Framework

EU CBAM & Circular Eco-Design Directives

With the phased implementation of the European Union's Carbon Border Adjustment Mechanism (CBAM) and revised Eco-design Requirements for External and Industrial Power Supplies, European importers face carbon disclosure obligations. Industrial supplies will be evaluated not only on bill-of-materials cost but also on embodied carbon during SMT manufacture, repairability indexes, and modular disassembly for lead-free/halogen-free component recycling.

Production Infrastructure

10,000 m² Advanced Manufacturing & Testing Facility

Headquartered in Wenzhou, Zhejiang, China, Zhejiang Harlon Electronic Co., Ltd. operates state-of-the-art automated production, soldering, and environmental stress chambers. Audited on-site by SGS and operating under ISO 9001 quality systems.

Automated SMT Assembly Line for Power Supplies

Automated SMT & Wave Soldering

High-speed surface mount technology (SMT) pick-and-place lines combined with nitrogen-inerted wave soldering machines guarantee zero-defect solder bridges, precise component alignment, and structural integrity across multi-layer power PCB assemblies.

Loaded Aging Burn-in Test Room

100% Loaded Burn-In Screening

Every single power supply unit passing through our factory floor undergoes mandatory 4 to 8-hour dynamic burn-in testing under full rated load at elevated ambient temperatures (45°C - 50°C), triggering infantile component failures before export dispatch.

EMC Anechoic Shielding Room and Laboratory

In-House EMC & Surge Laboratory

Equipped with conducted emission test receivers, lightning surge generators up to 6kV (IEC 61000-4-5), high-low temperature cyclic chambers, and digital storage oscilloscopes to verify complete compliance with CE EMC, FCC Part 15, and RoHS directives.

Procurement Due Diligence

Frequently Asked Technical & Commercial Questions

Critical clarifications regarding engineering specifications, custom ODM parameters, and international trade compliance.

How does Harlon verify genuine CE compliance versus self-declarations?

Every Harlon CE-marked power supply is supported by full test reports from accredited third-party laboratories covering both the Low Voltage Directive (LVD EN 62368-1) and Electromagnetic Compatibility Directive (EMC EN 55032 / EN 55035). Full Technical Construction Files (TCF) and Declarations of Conformity (DoC) are available for customs verification upon order placement.

Can you customize output voltage rails outside standard catalog values?

Yes. Backed by 18 years of OEM/ODM engineering, our design team routinely modifies transformer turns ratios, feedback resistor dividers, and output capacitor banks to supply non-standard DC voltages (such as 36V, 60V, 72V, 96V, or 110V DC) tailored to specialized battery chemistry charging or automated motion control systems.

What is the typical inrush current, and how is it suppressed?

Without suppression, cold-start inrush currents can easily exceed 60A, tripping upstream miniature circuit breakers (MCBs). Our switching power supplies incorporate NTC thermistors and internal bypass relays on kilowatt-class models to restrict cold-start inrush currents below 30A @ 230VAC, protecting your AC distribution network.

How are warranty claims and field return rates (RMA) resolved?

We maintain an audited field return rate (RMA) below 0.3%. All standard industrial models carry a standard 2 to 3-year factory replacement warranty. If an anomalous failure occurs, our quality assurance engineering department conducts Root Cause Failure Analysis (RCFA) on returned PCBA samples within 5 business days.

What trade terms and currency payment options do you support?

To support global supply chains across North America, Europe, South America, and Asia, we accept Incoterms including EXW, FOB Ningbo/Shanghai, CFR, CIF, and DDU. We transact directly in USD, EUR, HKD, and CNY via Wire Transfer (T/T), Letter of Credit (L/C at sight), PayPal, and secure Escrow arrangements.

Do you support private labeling, custom laser markings, and custom packaging?

Yes. OEM clients can specify laser-engraved aluminum top shells, custom silk-screen brand logos, bespoke terminal block configurations, and barcode-serialized master carton packaging. Full technical IP protection and non-disclosure agreements (NDAs) are established prior to receiving your mechanical CAD drawings.

Accelerate Your Power Supply Program with Direct Factory Engineering

Send your voltage, current, mechanical footprint, and certification targets directly to our technical sales team in Zhejiang. Receive validated technical datasheets, 3D STEP models, and commercial wholesale quotations within 24 hours.