OEM PCB Assembly and Soldering Solutions

STHL PCBA Market & Services

Shenzhen STHL is a premier high-quality provider of electronics manufacturing services (EMS) in China. We serve customers worldwide along the whole industry chain including PCB layout, components sourcing, PCB fabrication, PCBA assembly, cable assembly, box build assembly, and comprehensive testing services.

Established in 2006, with 20 years of experience in electronics contract assembly manufacturing, STHL has grown to support a dedicated workforce of 220+ high-skilled staff members. Our ISO-certified 10,000 sqm facilities host 7 state-of-the-art SMT assembly lines, 2 DIP/THT lines, 2 functional testing (FCT) lines, and 2 finished device box-build assembly lines.

At STHL, we provide high-grade electronics assembly services for energy power, communications, automotive, medical, consumer electronics, computers & storage, safety & security, commercial and industrial products. Our primary customer footprints span across USA, Germany, Italy, UK, Poland, New Zealand, Argentina, Brazil, Turkey, Korea, Thailand, and 90 other regions of the world. Welcome to visit STHL factory at any time.

Through-Hole Technology (THT) Assembly Strength

For high-power applications, connectors, and heavy mechanical stress points, Through-Hole Technology remains indispensable. STHL PCBA provides dual-capacity THT manufacturing that features:

• Manual and Automatic Component Insertion: Utilizing advanced wave soldering machinery alongside highly skilled technicians for precision assembly of complex mixed-technology boards.
• Custom THT Assembly Fixtures: Custom-engineered wave solder pallets protect sensitive components and guarantee precise alignment.
• ESD and RoHS Compliant Soldering: Rigorous compliance with lead-free standards (RoHS) in a strict ESD-protected environment to prevent electrostatic latency defects.
• Advanced Wave & Selective Soldering: Maintaining optimal alloy temperature profiles to achieve uniform solder fillet climb under IPC-A-610 Class II and III standards.

All finished THT assemblies undergo rigorous electrical testing, automated optical inspection, and functional verification, matching the stringent quality metrics applied to SMT lines.

In the modern commercial landscape, reliability is not optional. Industry 4.0, autonomous transport, IoT-enabled infrastructure, and advanced healthcare equipment require hardware that performs continuously in harsh environments. As an electronics contract manufacturer with global reach, STHL understands the unique operating environments of these sectors.

For example, in medical imaging technology such as CT scanners, a single PCB failure can stall hospital workflows. In green energy ecosystems, Battery Management Systems (BMS) must operate safely under intense thermal variations and high voltages. Our engineering processes are optimized to produce PCBs that handle these demanding operational profiles reliably.

By leveraging certified quality systems—specifically IATF 16949 for automotive electronics and ISO 13485 for medical devices—we ensure every manufacturing stage, from paste printing to thermal profiling and automated optical verification, is documented and repeatable.

Deploying electronics in global markets requires compliance with specific regional standards. From safety-critical transportation circuits to sensitive environmental sensors, our manufacturing adheres to international regulations:

• Medical Grade Deployment (ISO 13485): Supporting Class II and Class III medical device assemblies with complete device history records (DHR), material traceability, and cleanroom handling protocols.
• Automotive Electronics (IATF 16949): Implementation of strict PPAP (Production Part Approval Process) standards, failure mode analysis (FMEA), and robust thermal shock testing.
• Environmental & Safety Compliance: Full conformance to EU RoHS directives, WEEE requirements, and UL-certified material sourcing.

We work closely with customers to support their compliance testing and certification processes, providing the documentation and material verification needed for successful market entry.