A Real Factory Behind Every Zhongxin Shutong Industrial Switch

SMT Production Line

Placement, inspection and assembly under one roof — in a climate-controlled clean room.

The line runs automatic solder-paste printing, high-speed pick-and-place machines, AOI optical inspection and reflow soldering, followed by DIP through-hole assembly and a 6-meter final assembly line. Placement capability reaches 008004 chips and 0.35 mm BGA pitch — the same class of process used for carrier-grade telecom boards.

Both clean rooms hold 20–26 °C year-round with humidity between 30 % and 70 % RH and dust fall below 0.008 g/m² per 30 days — because solder-joint reliability starts with the environment the board is built in.

In-House Testing Lab

Every claim on our datasheets can be reproduced on our own bench.

• Temperature & humidity chamber

  TC-100 · -40…+85 °C cycling
  Proves the -40…+75 °C wide-temperature ratings printed on our industrial datasheets — units are cycled, not just labelled.
• EMC surge / interference generator

  PRM61245T
  Electromagnetic interference and surge immunity testing — the reason our switches survive next to motors, inverters and power cabinets.
• Hi-pot (withstand voltage) tester

  TL5502A
  Insulation withstand testing on power inputs — verifying isolation before a unit ever reaches your electrical cabinet.
• Network protocol testers ×2

  BIG TAO210 / TAO220
  Layer 1–3 verification: physical link, data link and network layer behaviour under load — throughput and latency checked per batch.
• Oscilloscope

  TBS2202B · 200 MHz
  Signal-integrity checks on power rails and data lines during design verification and failure analysis.
• Optical power meter & insulation tester

  OM-606 / LC25B-3
  Fiber ports measured for real optical budget; chassis insulation verified — the details that decide field reliability.

Beyond the lab, our industrial-line flagship models also hold third-party test reports from a state-grade electric power research institute and national network-access licenses — see Certifications below.

Quality Control, Stage by Stage

Nine control points from raw material to sealed carton. Here are the six a buyer should care about.

Supplier discipline is enforced, not assumed: bottom-10 % performers enter corrective-action plans, unannounced flying audits cover 40 % of annual supplier reviews, and two consecutive quarters above defect thresholds trigger replacement sourcing.

Company Qualifications (Manufacturer)

Third-party certified management systems and product licenses — copies available on request with a confirmed order.

We publish certification names rather than scanned certificates to protect factory identity in a competitive OEM market — every document can be shown to serious buyers during order confirmation.

Industrial Customization (OEM / ODM)

If your automation project needs a switch that catalogs don't sell — we build it.

Factory automation lines speak more than Ethernet: our platform supports the industrial protocols below natively, and our engineering team adapts port maps, power inputs and firmware behaviour to your PLC environment.

What we customize: Port combinations (copper/SFP counts), power inputs (DC 24/48 V dual, AC 220 V), wide-temperature builds, conformal coating, ProfiNet/EtherNet-IP/MODBUS TCP priority profiles, private-label branding for volume buyers, and firmware feature tailoring.

Product families available for custom builds: Industrial PoE switches · Layer-3 industrial switches · TSN time-sensitive switches · industrial NAT routers · ProfiNet-priority switches · EtherCAT branch modules for multi-axis machine networking · serial device servers (RS-232/485) · IoT gateways / environment monitoring hosts · industrial fiber media converters · E1 protection-channel switching units.

How it works: Send your topology or BOM on WhatsApp → our engineer replies with a feasibility read and a spec proposal → sample build and test report → volume production on the line shown above. Typical sample lead time is discussed per project — no obligation at the feasibility stage.

OEM samples ship in neutral casing in small batches — test the build quality with your own hands before you put your brand on it.

Proven in the Field

The same production line has been shipping into infrastructure projects since 2021.

These are infrastructure networks where acceptance tests cannot fail — the strongest evidence that the same hardware will hold up in your project.