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AC DC power adapter production line at FuYun Shenzhen factory
Universal AC power adapter and PD charger range manufactured by FuYun
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Shenzhen FuYun (RUIYU) · Since 2010

Power Adapter Manufacturer for AC DC, PD & Switching Power Supplies

FuYun (RUIYU) designs and builds external power supplies for OEM brands, telecom operators and appliance makers in more than 100 countries. From a 5 V 5 W wall-mount adapter for a set-top box to a 120 W GaN PD charger or an open-frame switching power supply, every unit leaves our Shenzhen and Shaanxi plants with its own traceable electrical test record.

Because we own the full chain — transformer winding, SMT/PCBA, ultrasonic welding, hi-pot and burn-in ageing — engineering changes reach the line in days, not weeks. That is why brands such as Hama (Germany), European set-top-box operators and the Xiaomi eco-chain qualified us as a long-term power supply partner.

3 W – 300 WOutput power coverage
90–264 V ACUniversal wide input
DoE VI / ErP T2Efficiency compliance
500 pcsTypical starting MOQ

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Trusted by global brands & OEM programmes

Partner brand using FuYun power adapters OEM customer of FuYun switching power supplies Electronics brand partner of FuYun power technology Consumer electronics partner logo Appliance brand partner logo Telecom operator partner logo Smart home brand partner logo Retail chain partner logo
About FuYun

Fifteen Years of Power Conversion Engineering

Shenzhen FuYun(RUIYU) Technology Co., Ltd. combines R&D, production, sales and after-sales service for power adapters, chargers and high-voltage core parts used in beauty instruments. Select a topic to see how we work.

One integrated team covering R&D, production, sales and after-sales service for power adapters, chargers and high-voltage core components. Our platform library already holds hundreds of qualified topologies — flyback, quasi-resonant and active-clamp GaN — so a new project usually starts from a proven, safety-approved base instead of a blank page.

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Our sales and engineering team supports worldwide customers 24 hours a day by email, telephone, WeChat, Skype and Facebook. Each account gets a named project engineer who owns the BOM, the certification file and the shipping schedule — one contact, from enquiry to reorder.

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We strictly follow ISO 9001 and our internal SOP: every adapter passes full-cycle testing before packing and shipping. Production records are archived for years, giving 100% traceability for each unit produced — component lot, test values, operator and line are all recoverable if a field issue ever needs analysis.

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Customisation Workflow

Eight Controlled Stages Behind Every Custom Power Adapter

These are the stages a buyer can audit on our line. Each one produces a measurable record, which is what makes batch consistency repeatable rather than accidental.

PCBA assembly stage icon Step 01

PCBA

SMT placement and wave soldering with SPI and AOI checkpoints for solder-paste volume and polarity.

Bare-board electrical test icon Step 02

Bare-Board Test

Open/short verification before component loading, eliminating latent PCB defects at the cheapest stage.

First function test icon Step 03

First Function Test

No-load voltage, load regulation and ripple measured against the approved sample limits.

Ultrasonic welding icon Step 04

Ultrasonic Welding

Sealed ABS/PC housings with controlled amplitude and pressure — no screws, no glue, consistent drop strength.

Hi-pot dielectric withstand test icon Step 05

Hi-Pot

100% dielectric withstand test on primary-to-secondary isolation, the core safety gate for CE and UL files.

Burn-in ageing rack icon Step 06

Burn-In

Loaded ageing at elevated temperature to force out early-life failures before the goods ever ship.

Final function test icon Step 07

Final Function Test

Output accuracy, OCP/OVP/SCP trigger points and polarity re-confirmed after assembly and labelling.

Packing and carton marking icon Step 08

Packing

Retail or bulk packing with barcode, shipping-mark and drop-test-verified carton structure.

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Product Showcase

Find the Ideal Power Supply for Your Application

Wide-input platforms with interchangeable plug heads, cable sets and connector options — ready for set-top boxes, routers, POS terminals, LED lighting, medical devices and small appliances.

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One-Stop Destination

From Specification Sheet to Palletised Delivery

Most buyers do not only need an adapter — they need the cable set, the plug variants, the certification file and a packing format that clears customs without a re-label. We handle all four in one purchase order.

Engineering co-development of a custom power adapter solution

Co-Engineering & DFM

Send us a load profile, connector type and target efficiency class. Our engineers return a topology proposal, a BOM cost breakdown and a design-for-manufacture review, normally within three working days.

Tooling and mould development for custom adapter housings

Tooling & Certification

In-house mould partners for bespoke housings, plus a dedicated compliance team that manages UL, CE, UKCA, PSE, KC, CCC and SAA submissions and keeps the technical construction file current.

Volume production and logistics of power adapters

Volume Supply & Logistics

Dual manufacturing bases in Shenzhen and Shaanxi give capacity resilience. FOB Shenzhen / Hong Kong, CIF or DDP with consolidated retail-ready packing and archived test data per lot.

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2010

Established — 15+ years in power conversion

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Export countries & regions served

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Total manufacturing floor area

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Valid safety & efficiency certificates

FuYun manufacturing facility backdrop
Company Milestones

A Verifiable Track Record, Year by Year

Select a year to see how FuYun grew from an R&D house into a multi-site power supply manufacturer.

2010

Shenzhen Haoshuo Tec Co., Ltd founded as an R&D company

The business started as a pure design house, developing switching power supply circuits for other manufacturers — which is why engineering, not trading, is still the centre of the company.

Insights & Resources

Engineering Knowledge for Power Supply Buyers

Practical, specification-level articles written by our own product engineers — protection circuits, voltage/current matching and real application scenarios.

Guide to common power adapter protection functions

Common Power Adapter Protection Functions: A Complete Safety Guide for Buyers

Over-voltage, over-current, short-circuit and over-temperature protection explained — what each circuit actually does and how to specify trigger points in your datasheet.

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Application scenarios of 5V power adapters in consumer electronics

Application Scenarios of 5 V Power Adapters in Consumer Electronics

Why 5 V remains the most widely deployed low-voltage rail, from routers and IP cameras to smart speakers — plus the current headroom you should design in.

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How to choose the right power adapter voltage and current

How to Choose the Right Power Adapter Voltage and Current

Matching voltage and current is the first rule of adapter selection. This guide covers tolerance bands, inrush behaviour and the safety margin we recommend for 24/7 devices.

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Sourcing FAQ

Answers Procurement Teams Ask Us First

Standard housings start from 500 pcs per model, because that is the quantity at which our SMT line can be tooled economically without amortising set-up cost into the unit price. Fully bespoke enclosures require a new injection mould, so we normally recommend 3,000 pcs or more for the first order to keep the tooling share reasonable.

Electrical samples built on an existing platform are ready in 7–10 working days. A new PCB layout with safety-compliant transformer design takes 15–20 days. Mass production lead time is typically 20–30 days after sample approval, subject to plug type, cable set and certification status.

We hold more than 120 valid certificates covering UL/cUL, CE (EN 62368-1), UKCA, CCC, PSE, KC, SAA/RCM, BIS and CB reports, together with DoE Level VI and EU ErP Tier 2 no-load and average-efficiency compliance. IEC 60601-1 designs are available for medical AC adapters with 2×MOPP isolation.

Every switching design includes over-voltage protection (OVP), over-current protection (OCP), short-circuit protection (SCP), over-temperature protection (OTP) and no-load standby power control. Y-capacitor and common-mode choke filtering keeps conducted emissions within EN 55032 Class B limits.

Production follows ISO 9001 procedures and a documented SOP: bare-board test, first-article function test, ultrasonic welding, 100% hi-pot test, burn-in ageing and final function test. Test records are archived for years, so every serialised unit remains 100% traceable to its component lot, line and operator.

FuYun power adapter engineering team backdrop
Talk to Our Team

Let's Engineer the Right Power Supply for Your Product

Tell us the output voltage, current, connector and target market. Our project engineers reply within 24 hours with a platform recommendation, certification path and realistic lead time.

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