Manufacturing Process & Quality Testing Facilities | Zhejiang Harlon Electronic Co., Ltd.

Enterprise Manufacturing Excellence

Factory-Direct Precision from Zhejiang Harlon Electronic Co., Ltd.

Operating from an advanced 10,000 m² facility in Wenzhou, Zhejiang, China, Zhejiang Harlon Electronic Co., Ltd. integrates full-lifecycle manufacturing for industrial switching power supplies (10W–3000W). Certified under ISO 9001 and verified on-site by SGS, we execute rigid quality control protocols from silicon wafer inspection to packaged unit dispatch. With over 18 years of specialized engineering experience, our automated surface-mount, wave soldering, and comprehensive electrical labs guarantee defect-free reliability for global OEM/ODM procurement.

SGS On-Site Audited

Our production facilities, workforce capabilities, and environmental systems are assessed on-site by international third-party certification bodies.

100% Full-Load Burn-In

Every single power supply unit undergoes prolonged loaded high-temperature aging to filter out premature component failures before shipment.

Independent R&D Lab

Equipped with an EMC shielding chamber, surge lightning simulators, and automated test benches headed by 30-year veteran power engineers.

Standardized Operation Flow

9 Controlled Steps of SMPS Manufacturing

Standardized workflows minimize variation across mass-production batches, ensuring custom sample designs match bulk deliveries precisely.

Raw Materials Inspection (IQC)

Rigorous incoming verification of power ICs, premium long-life capacitors, magnetic cores, and FR-4 PCBs against strict parametric standards.

SMT Placement

High-speed surface-mount placement with micro-pitch precision, paste inspection, and reflow soldering for clean, reliable board topologies.

Through-Hole Inserting (AI)

Automated insertion coupled with skilled manual assembly for bulk electrolytic capacitors, chokes, power MOSFETs, and high-wattage inductors.

Wave Soldering

Dual-wave nitrogen soldering systems ensuring consistent solder joint fillets, zero cold welds, and optimal thermal conductivity across boards.

Output Voltage Calibration and Adjusting

Voltage Adjusting

Manual potentiometer fine-tuning and precision digital trimming guaranteeing tight DC output accuracy within ±1% across all standard lines.

Mechanical Assembly

Chassis integration with galvanized/aluminum enclosures, thermal heat-sink compounding, terminal blocks, and internal high-grade insulation barriers.

Burn-in Aging

100% full-load thermal stress burn-in under real operational voltages to eradicate component infant mortality before final unit sealing.

Comprehensive Testing

Computerized ATE screening measuring ripple voltage, power factor, short circuit protection, over-voltage cutoff, and hi-pot isolation safety.

Packaging & OQC

Laser engraving, OEM custom barcode labeling, moisture barrier packaging, and drop-tested reinforced cartons tailored for global sea and air cargo.

Advanced Machinery

State-of-the-Art Production Floor Machinery

Over 10 dedicated lines integrating automation to ensure strict dimensional tolerances, solder integrity, and high-volume scalability.

Wave Soldering Machine

Precise temperature management across pre-heat zones prevents thermal shock while ensuring thorough through-hole solder fill.

Automatic Inserting Machine

High-speed radial and axial insertion equipment minimizing human error and enhancing PCBA structural regularity.

SMT High-Speed Mounters

Automated multi-nozzle pick-and-place lines supporting dense SMD layouts, fine-pitch ICs, and micro resistors.

Double Liquid Glue Machine

Precision potting systems for waterproof LED drivers and harsh-environment SMPS delivering void-free thermal dissipation.

Automatic Packaging Machine

Streamlined shrink-wrapping, box folding, and automated sealing safeguarding power supply enclosures during intercontinental transit.

Integrated Production Lines

Lean assembly lines synchronizing sub-assembly, wire harness connection, and chassis fastening under ESD protective environments.

SMT Assembly Conveyor Lines

Linked conveyor stations with automatic optical sorting guaranteeing seamless flow between solder printing and thermal reflow.

Automatic Labelling Machine

Zero-tolerance placement of UL, CE, RoHS compliance labels, model ratings, serial numbers, and custom OEM private branding.

Robotic Assembly Systems

Semi-automated screw-fastening and mechanical housing locking mechanisms guaranteeing uniform casing structural rigidity.

Lab Verification

Reliability & Safety Testing Laboratory

Zhejiang Harlon Electronic Co., Ltd. tests beyond standard operating parameters. Our in-house equipment simulates severe grid volatility, lightning surges, and mechanical vibration.

Stress Screening

Aging Tester

Automated burn-in racks cycling real resistive and electronic loads under elevated temperatures to detect latent hardware defects.

Thermal Range

High & Low Temp Chamber

Validates operating stability and cold start-up reliability under extreme weather conditions ranging from -40°C to +85°C.

Surge Protection

Lightning Surge Generator

Evaluates transient surge immunity (up to 4kV-6kV) ensuring uninterrupted performance in lightning-prone outdoor environments.

Waveform Analysis

Digital Storage Oscilloscope

High-bandwidth waveform observation verifying low ripple & noise, dynamic transient response, and switching overshoot.

Mechanical Integrity

Vibration Instrument

Simulates mechanical resonance and freight transit shock (10-500Hz, 2G-5G) to verify structural joint resilience.

EMC Isolation

Shielding Test Room

Isolated RF-attenuated chamber ensuring precise conducted emission and radiated interference verification without external noise.

Grounding Safety

Earth Resistance Tester

Verifies chassis ground safety resistance, ensuring zero risk of electrical leakage and complete operator safety.

Compliance Check

EMI Test Receiver

Precision receiver measuring EN55032 Class B electromagnetic compliance across low and high switching frequencies.

Full Parameters

Performance Tester

Integrated automated equipment measuring conversion efficiency, active PFC factors, line regulation, and temperature coefficient.

Load Simulation

DC Electronic Load

Programmable CC, CV, CP, and CR load test arrays analyzing continuous duty limits, step loads, and over-current threshold protections.

Dielectric Withstand

High Voltage Test System

Dielectric withstand (Hi-Pot 3000VAC - 3750VAC primary-to-secondary) verifying insulation barriers comply with global standards.

Automated Logging

Automatic Testing System

Synchronized multi-channel testing console delivering cloud data logging, pass/fail identification, and batch serial tracking.

Automated AOI

Optical Inspection (AOI)

High-resolution optical camera inspection scanning component polarity, solder bridges, missing elements, and dry joints.

Manufacturing Process & Quality Control