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About Us

Sum Wai has been a professional manufacturer of wire & cable assemblies since 1991. Enriched by over 30 years of experience in the industry, we are experts in the following kinds of cables: High performance industrial cables, Automotive wire harnesses, Medical grade cables, Consumer electronic cables , AC/DC cables. 

Our factory in Dongguan China covers 2,000 square meters which ensures a large production capacity and prompt delivery time frames. We provide a one-stop solution from bare wire extrusion through to finished and customized products with terminal crimping, connector soldering, over molding and more.

We hold an ISO9001 quality certification and our laboratory helps to conduct product testing to both our customer requirements and worldwide approval standards. 

We produce cables for many of the top brand name consumer electronic products that you probably use in your home or business!

Let us take your products to the next level and build a strong relationship together!

2000
Plant area
50 +
Total number of personnel
8 lines
Assembly lines
1996 year
The company was founded in
Qualifications and Honors
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
ISO9001:2015
How to determine if a 'dynamic cable' is needed?
In the actual selection process, determining whether dynamic cables are needed can be approached from the following dimensions:Do you engage in frequent physical activity?Such as robot joints, AGV walking, and robotic arm extension and retraction, belong to dynamic scenes.Is the frequency of exercis...
Why do drag chain cables have to use multiple strands of fine copper wire twisted conductors?
In dynamic cables, the design of the conductor structure directly determines the flexibility, fatigue resistance, and conductivity of the cable. And 'multi strand thin copper wire twisting' is the key technology to cope with this extreme sports environment.1. Improve flexibility: The finer t...
What is the difference between "dynamic" and "static" of robot cables?
Static cable: stable, safe, suitable for fixed connectionStatic cables are commonly used for fixed line connections of equipment, such as power input and signal lines between control cabinets. Their characteristics are:Stable working environment: no frequent movement, no bending, no vibrationSmall l...
How to evaluate exercise intensity and choose appropriate drag chain cables?
The lifespan of a drag chain cable is essentially its durability under dynamic mechanical stress. The intensity of exercise determines whether cables will be repeatedly bent, twisted, or stretched, leading to fatigue fracture or insulation damage.1. Clarify the motion parametersBefore selecting, it...
How to maintain signal stability in high-strength bending of drag chain cables?
The reason why the robot specific drag chain cable can compromise and ensure that the signal is not lost, shaken, or drifted after millions of bends relies on the collaboration of the following four technical pillars:Pillar 1: Scientific Setting of Minimum Bending RadiusUnder dynamic conditions, the...
The core structure of robot specific cables
The industrial robot specific drag chain cable is a system engineering tailored for "millions of bends" from the inside out:1. Conductor: 0.08mm grade ultra-fine copper wire+layered strandedWe use ultra-fine oxygen free copper wire that complies with VDE 0295 Class 6 or IEC 60228 Class 6 s...
Why do industrial robots require specialized cables?
In the world of industrial robots, cables are often referred to as the "neural bloodline" - they carry motor power, encoder feedback, sensor signals, visual transmission, and even real-time communication bus data. However, many factories habitually use ordinary BV wires, RV flexible wires,...

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