Stpete Electronics
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As a manufacturer specializing in the R&D and production of headphone sockets, our PJ-343 Copper Sleeve is a core conductive component tailored for mid-to-high-end headphone sockets. With its precision craftsmanship and high-quality materials, it has become the preferred accessory for consumer electronics and professional audio equipment manufacturers.
Contact resistance is stably controlled below 10mΩ, which minimizes audio signal transmission loss and restores pure sound quality.
Remains structurally intact after 5,000 insertion-extraction tests, with an elastic attenuation rate of less than 5%, far exceeding the industry standard.
Surface undergoes multi-layer nickel plating, enabling 500 hours of oxidation and rust resistance in extreme environments (-20℃ to 85℃ with 85% humidity).
In terms of dimensional accuracy, the PJ-343 Copper Sleeve strictly adheres to industry standards, with the inner diameter tolerance controlled within ±0.02mm. It perfectly fits 3.5mm universal headphone plugs, ensuring smooth insertion and extraction without jamming. Meanwhile, it is compatible with the assembly requirements of MMCX detachable-cable headphone sockets, providing customers with flexible product design space.
The PJ-343 Copper Sleeve has obtained CE certification (complying with EN 60950-1 electrical safety standards and EN 55022 EMC anti-interference standards) and RoHS 2.0 environmental certification. The content of hazardous substances such as lead, cadmium, and mercury is far below the limit values, fully meeting the access requirements of the European Union, North America, and mainstream domestic markets.
Relying on a mature industrial chain, we implement full-process control from raw material selection to finished product inspection and provide customized surface treatment services to help customers enhance the competitiveness of their products.
Whether it is consumer electronics such as mobile phones and laptops, or high-end audio products such as HiFi players and professional recording equipment, the PJ-343 Copper Sleeve can empower headphone sockets with stable performance and serve as a solid backing for the quality of your products.
