An EMS Partner Built forDemanding Cable Assembly Projects
STHL Technology has manufactured electronic assemblies since 2006. Headquartered in Shenzhen, our 10,000 sqm facility operates 220+ full-time engineers and technicians across SMT, THT, cable assembly, and box build production — all under a single quality management system.
Most cable assembly manufacturers handle wire and connectors. We handle the complete product. When your project requires cable assembly integrated with PCBA, panel mount, or finished device assembly, every process runs in-house, under the same certification, with a single point of accountability.
Our quality system simultaneously holds ISO 9001:2015, ISO 13485:2016, IATF 16949:2016, and ISO 14001:2015 — a combination required by fewer than 5% of EMS manufacturers globally, and one that signals we build for environments where failures are not acceptable.
- <5% of EMS hold all 4 standards
- 7 High-speed surface-mount technology (SMT) production Lines
- 2 THT (Through-Hole) Lines
- 2 Manual Soldering Lines
- 2 Testing Lines
- 2 Final Box-Build Assembly Lines
- 1.25M+ components placed / hour
What We Build
End-to-end cable assembly under a single quality system — from spec review to verified shipment.
Technical Specifications
| Spec | Data |
|---|---|
| Minimum wire gauge | 32 AWG (0.03mm²) |
| Connector brands (OEM) | Molex · TE Connectivity (Tyco) · JST · Hirose (HRS) · Amphenol |
| Certificate of Conformance | Original CoC from each connector manufacturer, full lot traceability |
| Cost-optimized alternatives | Verified domestic brands with comparative test data on request |
| Industry standard | IPC/WHMA-A-620 Class II (commercial/industrial) & Class III (medical/automotive) |
| Volume range | 10 pcs prototype → high-volume production |
Testing — Every Assembly
| Test | Method | Parameters |
|---|---|---|
| Continuity Test | 100% automated machine | Full pin-to-pin matrix · zero tolerance for open / short / miswire |
| Hi-Pot (Hipot) Test | Per product specification | DC 300V~1500V · AC 100V~1000V |
| Insulation Resistance | Per IEC / UL standards | 10MΩ~100MΩ threshold |
| Pull Force Test | Digital force gauge, destructive | Per UL486A and terminal datasheet, recorded in Newtons per terminal |
| Capability | Typical Cable Vendor | Advantage |
|---|---|---|
| Scope | Cable assembly only | Cable + SMT PCBA + THT + Box Build, one facility |
| SMT Capacity | None or outsourced | 1.25M+ components/hour · 6 SMT lines in-house |
| Certifications | ISO 9001 only | ISO 9001 + ISO 13485 + IATF 16949 + ISO 14001 |
| IPC Standard | Often unverified | IPC/WHMA-A-620 Class II & III, documented |
| Hi-Pot Testing | Spot check | 100% per assembly, DC up to 1500V |
| Continuity Testing | Sample-based | 100% automated full-matrix test |
| Connector Traceability | Distributor stock, no CoC | Original manufacturer CoC, lot traceable |
| Record Retention | 1-2 years | Up to 15 years (IATF 16949 automotive projects) |
| Prototype MOQ | Often 100-500 pcs minimum | From 10 pcs · 3-5 business day turnaround |
STHL PCBA Manufacturing Standards
ISO 9001:2015 / GB/T 19001-2016
ISO 14001:2015 / GB/T 24001-2016
IATF 16949:2016
ISO 13485:2016 / GB/T 42061-2022
What Happens Between Your BOM and Your Shipment
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Engineering Review：
We review your wire specification, connector BOM, and drawing before accepting the order. Connector availability, wire gauge compatibility, and crimping tooling are confirmed at this stage — not discovered during production.
-
Material Sourcing：
Connectors from authorized distributors for Molex, TE Connectivity, JST, Hirose, and Amphenol, with original Certificate of Conformance per reel and lot. Verified domestic alternatives available with comparative test data.
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Assembly：
Cut, strip, crimp, and assembly on dedicated cable lines, separate from SMT production. IPC/WHMA-A-620 Class II or Class III workmanship applied per your project specification.
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100% Testing：
Full sequence: continuity matrix → Hi-Pot → insulation resistance → pull force sampling. No assembly exits the line with a failing record.
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Documentation & Shipment：
Full production records generated per IPC standards. Automotive: 15-year retention. Medical: 5–10 years per ISO 13485. Records available for supplier audit at any time.
What is your minimum order quantity for cable assembly?
We have no strict MOQ. Prototype runs from 10–50 pcs are accepted regularly, particularly for NPI (new product introduction) and engineering validation stages. Production pricing applies from 500 pcs.
How quickly can you deliver cable assembly samples?
If connector and wire materials are in stock, prototype delivery is 3–5 business days. If your project requires imported long-lead connectors, we request sample materials immediately to meet your engineering timeline without delaying your production quote.
Do your cable assemblies conform to IPC/WHMA-A-620?
Yes. All cable production, crimping, assembly, and inspection follows IPC/WHMA-A-620. Class II applies to standard commercial and industrial products. Class III applies to medical and automotive projects requiring the highest reliability and documentation standards.
What Hi-Pot testing voltage do you support?
DC 300V to 1500V, or AC 100V to 1000V, depending on your product specification. Insulation resistance is tested to 10MΩ–100MΩ threshold. All results are recorded per assembly and available for audit.
Can you source Molex, TE Connectivity, or JST connectors directly?
Yes. We have direct procurement channels for Molex, TE Connectivity (Tyco), JST, Hirose (HRS), and Amphenol, with original Certificate of Conformance provided for each lot. For cost-sensitive programs, we also offer verified domestic connector alternatives with comparative test data.
Can cable assembly be combined with PCBA in the same order?
Yes — this is a core capability at STHL. Your cable assembly, PCB assembly, and box build can be processed in the same facility under the same quality system, reducing coordination overhead, shipping events, and traceability gaps that typically occur when using separate vendors.
How long do you retain quality records?
Standard ISO 9001 projects: 2 years. Automotive projects under IATF 16949: 15 years (including post-vehicle-lifecycle service periods). Medical projects under ISO 13485: minimum 5–10 years, aligned with product service life.
Are you able to support automotive and medical cable assembly simultaneously?
Yes. Our IATF 16949 and ISO 13485 certifications are both active and maintained concurrently, which means a single facility can produce to either standard — or both — within the same production cycle under separate work orders and documentation streams.
Tell Us Your Requirements
Send us your specification — wire type, connector model, quantity, and application — and our engineering team will respond within 24 hours with a quote or technical clarification.
✔Reviewed by a technical engineer, not a sales rep
✔Response within 1 business day
✔NDAs and supplier qualification packs available on request
