Manufacturing Capabilities & Quality Testing Lab

Production Workflow

End-to-End 9-Stage Manufacturing Process

Zhejiang Harlon Electronic Co., Ltd. implements complete process control under ISO 9001 standards to maintain industrial-grade precision and consistency from components to finished shipments.

Stage 01

Raw Materials Inspection

Rigorous IQC verification of ICs, electrolytic capacitors, power MOSFETs, copper transformers, and bare circuit boards prior to release into warehouse stock.

Stage 02

SMT High-Speed Placement

High-precision automated solder paste printing, surface-mount placement, and multi-zone reflow soldering for high-density SMD circuitry.

Stage 03

Component Inserting

Automated insertion combined with guided manual assembly for heavy-duty transformers, bulk capacitors, inductors, and high-power semiconductors.

Stage 04

Wave Soldering

Dual-wave nitrogen soldering systems ensuring robust through-hole metallurgical joints, followed by meticulous de-drossing and post-soldering touch-up.

Stage 05

Voltage Calibration

Initial power-on precision tuning, calibration of potentiometers, output voltage trimming, and verification of over-current setpoints.

Stage 06

Mechanical Assembly

Precision integration into extruded aluminum or galvanized steel enclosures, thermal pad placement, chassis grounding, and terminal connector assembly.

Stage 07

100% Loaded Burn-in Aging

Every single power supply undergoes elevated-temperature, 100% full-load burn-in screening to eliminate infant mortality and guarantee field reliability.

Stage 08

Final Electrical Testing

Computerized ATE testing validating ripple & noise, load regulation, short-circuit recovery, overload thresholds, and dielectric breakdown safety.

Stage 09

Export Grade Packaging

Barcode verification, anti-static moisture-barrier bagging, drop-tested corrugated cartons, and palletized strapping ready for safe international freight.

Advanced Machinery

State-of-the-Art Factory Automation

Over 10 dedicated production lines in our 10,000 m² facility deliver high throughput, micron-level accuracy, and dependable OEM/ODM lead times.

Wave Soldering Machine

Precise thermal profiling and automatic flux spray for clean solder joints without bridging.

Automatic Inserting Machine

High-speed axial and radial lead forming and insertion ensuring minimal component stress.

SMT Placement System

High-speed surface mounter capable of handling 0402 micro-components up to complex multi-pin ICs.

Double Liquid Glue Machine

Automated vacuum potting of polyurethane and epoxy resins for IP67/IP68 waterproof power units.

Automatic Packaging Machine

Automated box erecting, weight checking, and cartoning for consistent export presentation.

Continuous Production Line

Ergonomic conveyor-fed workstations maximizing unit per hour (UPH) yield and build tracking.

SMT Automatic Assembly Line

Fully enclosed clean-air environment for high-reliability industrial power electronics PCBAs.

Precision Labelling Machine

High-resolution rating plate and custom buyer label printing with serial tracking integration.

Assembly Line Equipment

Modular assembly stations equipped with programmable torque electric screwdrivers and ESD monitors.

Reliability & Compliance

In-House Reliability Testing & Verification Lab

Zhejiang Harlon Electronic Co., Ltd. maintains a full suite of certified lab instruments replicating third-party test houses to ensure absolute safety, EMC compliance, and environmental ruggedness.

Burn-in Verification

Aging Tester

High-capacity burn-in rack with computer logging, dynamic load transitions, and continuous thermal feedback.

Environmental Stress

High & Low Temp Chamber

Environmental stress screening from -40°C to +85°C to verify cold-boot behavior and thermal derating curves.

Surge Immunity

Lightning Surge Generator

High-voltage impulse tester simulating real-world grid transients and industrial lightning strikes (up to 4kV-6kV).

Signal Integrity

Digital Storage Oscilloscope

Multi-channel high-bandwidth analysis of switching waveforms, transient response, ripple and peak-to-peak noise.

Mechanical Stress

Vibration Measurement

Electrodynamic shaker verifying structural robustness against transport shocks and severe industrial machinery vibration.

EMC Validation

Shielding Test Room

Full RF isolation anechoic chamber engineered for precise electromagnetic compatibility and radiated emission assessment.

Electrical Safety

Earth Resistance Tester

Precision milliohm ground bond testing guaranteeing operator safety and compliance with international standards.

Conducted Emissions

EMI Test Receiver

Spectral analysis evaluating conducted interference to guarantee adherence to EN55032 and FCC Class B limits.

Multi-Parameter Check

Performance Tester

Multi-channel verification testing active PFC power factor, full conversion efficiency, and multi-rail regulation.

Dynamic Testing

DC Electronic Load

Programmable dynamic load testing evaluating transient step response, CV/CC modes, and over-current trip timing.

Dielectric Withstand

High Voltage Test System

High-potential (Hi-Pot) insulation breakdown testing delivering up to 3750VAC primary-to-secondary isolation check.

Traceable Automation

Automatic Testing System

Fully automated pass/fail detection station saving electrical metrics directly to the product database for lot traceability.

Surface AOI

Optical Inspection Equipment

High-resolution Automated Optical Inspection (AOI) verifying solder fillets, component polarity, and placement alignment.