- Legal name
- Shenzhen Sunlord Electronics Co., Ltd.
- Name in Chinese
- 深圳顺络电子股份有限公司
- Founded
- 2000
- Headquarters
- Shenzhen, Guangdong, China
- Public listing
- Shenzhen Stock Exchange — code 002138, listed since 2007
- Capability layer
- Power conversion
- Product areas
- Power inductors · Wire-wound and planar transformers · Common mode chokes and filters · Chip ferrite beads · Varistors and NTC thermistors · Tantalum capacitors
- Wireless charging coils
- The company's product catalogue lists a wireless charging coil assembly in its automotive rangeCatalogued for automotive use, not for consumer Qi products. This is why the entry sits in power conversion rather than wireless power.
- Website
- sunlordinc.com
- Directory status
- Listed company — compiled from public information. Not a member.
What the company does
Sunlord Electronics manufactures chip electronic components. It was founded in 2000, is headquartered in Shenzhen, and has been listed on the Shenzhen Stock Exchange since 2007 under code 002138.
The published catalogue covers power inductors, wire-wound and planar transformers, common mode chokes and filters, chip ferrite beads, varistors and NTC thermistors, and tantalum capacitors, along with RF components and a range of automotive-grade parts.
Where it sits in the chain
Power conversion is the fourth layer of the industry map. It determines efficiency, thermal density and physical size — how much of the input energy reaches the output, and how much has to be carried away as heat.
The layer's supplier list is usually described in terms of controllers, because controllers are the part with a part number and a datasheet that looks like a decision. The magnetics around them — the inductor, the transformer, the common mode choke — are chosen later and often treated as a commodity. They are not. In a switching supply the inductor sets the ripple current, the core sets the loss, and the choke is frequently the difference between passing and failing an EMC test.
A note on classification, because the catalogue could reasonably be read two ways. Sunlord does list a wireless charging coil assembly, which would place it in the wireless power layer. That part is catalogued in the company's automotive range. This entry therefore sits in power conversion, where the company's general-grade magnetics belong, rather than claiming a consumer wireless charging line the catalogue does not show.
What to check when sourcing at this layer
Inductance against DC bias, not the headline value. A power inductor's rated inductance is measured at zero or low current. As current rises the core saturates and the inductance falls — sometimes by more than half within the operating range. A design that meets its ripple target on paper can fail in production because the datasheet's headline number was taken at a current the product never operates at. Ask for the inductance-versus-current curve.
Core material decides loss, and loss becomes heat. Ferrite and powdered iron behave differently in cost, saturation behaviour, and loss against frequency. The right choice depends on the switching frequency, which is a decision made in the controller. The two layers are coupled even though they are bought separately.
Thermal derating is the real rating. Every magnetic part carries a temperature rise for a given current. In a sealed charger the ambient inside the enclosure is well above room temperature, so the current a part can carry in the product is lower than the current it can carry on a bench.
EMI components are compliance, not decoration. The common mode choke is often what makes the difference at a test house. Sizing it late, or substituting a cheaper grade, moves a compliance problem into the certification stage, where it costs far more to fix.
Note on this entry
This entry was compiled by the alliance from the public sources listed below. It was not supplied, reviewed or approved by the company. Sunlord Electronics is not a member of the alliance, and listing is not an endorsement, a recommendation or an approval of any product.
The alliance has not tested any product from this company and does not know which parts appear in which products. Where that matters, ask the supplier for the part number and check it against the maker's own datasheet.
Sources
This entry was compiled by the alliance from the public sources listed below. It was not supplied, reviewed or approved by the company.