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Two lines today — power and connectivity — sourced and custom-built through partner factories we know closely in China and Vietnam. Standard SKUs or your own drawing, with origin, certification, and documentation on every unit.
HTS 8504.40
AC/DC power adapters, GaN chargers, and switching power supplies — standard or custom power supply builds to your voltage, connector, and enclosure.
Explore power →
HTS 8544.42
USB-C, HDMI, Ethernet, coax and fiber cables, hubs, and custom cable assemblies — molded, terminated, and tested on the same line as the power hardware.
Explore connectivity →
Need something adjacent? If it is power or connectivity hardware, ask — we source or build it to spec. A new line slots in here without changing how we work.
Discuss what you needYou deal with a US-based company and one person who owns the outcome — not an anonymous overseas broker.
We came up in power and cable manufacturing, in China and Vietnam, so we vet and build like the auditor you would send yourself.
Standard SKUs or built to your drawing, with the certifications and documentation your procurement team audits against.
We run one drawing set at qualified lines in both Vietnam and China — elect the origin that fits your sourcing strategy, documented per unit.
Product certifications on the label, the packaging, and the documentation your procurement team audits against — verifiable by file number on request.
cULus LISTED
cRUus REC.
cETLus
CE
FCC PART 15
RoHS
REACHManufacturing operates under ISO 9001:2015 · ISO 14001:2015 ·ISO/IEC 27001:2022 · TL 9000-H · QC 080000 HSPM · ESD S20.20 ·Amfori BSCI
Yes. Kestner is a US-based sourcing partner for power and connectivity hardware — you buy from an American company and reach a person who prices and owns the outcome.
Yes. Standard SKUs or fully custom — power supplies and cable assemblies to your drawing, with your brand on the housing and your artwork on the carton.
At qualified partner lines in Vietnam and China, under one engineering system and test procedure. You choose the country of origin.
Yes. We provide samples for approval before a production run, and buyers can audit either line by appointment.
UL 62368-1 and DoE Level VI on power, USB-IF and UL AWM on cable, plus FCC, RoHS, and regional marks — each verifiable by file number.
Tell us what you need — power or connectivity, standard or custom. A person answers, usually within one business day.