PINNED · NOTICE
2026.11.09
Statement: our business in mainland China
OPOYO has not established any company in mainland China.
Sales and technical service there are handled exclusively by our authorised distributors.
OPOYO GROUP ELECTRONICS CO., LTD. was founded in Sanchong, New Taipei in 1988; design, manufacturing and
shipment are coordinated from Taiwan. We have no subsidiary or branch office in mainland China.
Authorised channels in mainland China
The following are the only authorised channels for quotation, samples and technical support in the region.
The list may change; the authoritative version is on our Contact page.
- Authorised distributor: Shenzhen Jiayingsheng Electronics Technology Co., Ltd. · nancy@jiayingsheng.com
6506B, SEG Plaza, Futian District, Shenzhen
- Sales office: Shenzhen Oupengyang Electronics Co., Ltd. · Abner@opoyon-tech.com
23/F, Excellence Century Plaza, 4068 Yitian Rd., Futian District, Shenzhen
To verify a quotation: email
chen@opoyoconn.com
with the company name and part number, and we will confirm whether it came from an authorised channel.
Thank you for your attention.
OPOYO Group Electronics Co., Ltd. — 9 November 2026
Waterproof / Type-C
2023.05.01
Wire-solder waterproof Type-C: what actually decides the seal
Our waterproof Type-C reaches IPX8 with four contact pins (A4/B4 positive, A12/B12 negative) wired as two
parallel pairs, brought out as a single positive and negative lead. No PCB is required — solder two wires
and the connector charges.
How the seal works
The housing compresses a pre-installed O-ring radially against the panel. The cut-out must follow the
drawing: too large and the ring is not compressed, too small and the ring is nicked during assembly.
Assembly notes
- Seat the connector until the O-ring is evenly compressed, with no rolling or pinch.
- Fix with screws through both ears; torque matters more than most people expect.
- Strain-relieve the cable at the exit — solder joints should never carry the load.
Most failures we see in this design are not the connector: they are an unsupported cable
pulling on the solder joint, or a paint layer under the O-ring.
Plating
2021.04.16
Three things that decide plating quality on card sockets
Plating quality is largely decided before the parts reach the plating line. Surface roughness drives
porosity, appearance and corrosion resistance: the rougher the surface, the higher the porosity.
1. Plating does not hide defects
Spots, pits, scratches and burrs present before plating remain visible afterwards. Fix them at stamping
and pre-treatment, not in the bath.
2. Leave roughness headroom
Pre-plate roughness should be at least half of the final requirement, so the deposit has room to level
the surface.
3. Rough surfaces absorb hydrogen
Hydrogen deposits preferentially on rough surfaces, reducing current efficiency and coverage. For
corrosion-critical parts, control roughness upstream.
The ceiling of plating quality is set by pre-treatment. When surface quality already
compromises the deposit, more time in the bath will not fix it.
More notes are on the way. If there is a topic you want covered — waterproofing, mating force, solderability —
tell us.
