SIM Card Connector Assembly: Step-by-Step Manufacturing Process

SIM card connectors may look small, but the manufacturing behind them is a complete engineering system. At Moarconn, we combine precision tooling, high-accuracy stamping, automated assembly, and strict quality control to ensure every connector meets telecom-grade reliability.

Production starts with designing stamping molds and injection molds. The accuracy of these tools directly determines connector performance—especially card alignment, contact force, insertion smoothness, and lifespan.

Contacts are stamped from copper alloy strips using high-speed progressive stamping machines. Moarconn maintains dimensional tolerances within microns to ensure stable signal transmission and consistent insertion force.

To enhance conductivity and prevent corrosion, contacts go through selective plating (gold, gold-flash, tin, or palladium-nickel). The plating thickness is monitored in real time to guarantee connector durability over thousands of insertion cycles.

Housing parts are molded with high-temperature engineering plastics such as LCP or PA9T. Low warpage and high dimensional stability ensure the SIM card fits securely without jamming.

Moarconn’s in-house automated assembly equipment positions contacts, inserts springs, locks housings, and conducts real-time optical inspection. Automation improves consistency and reduces manual defects.

Before packaging, every connector undergoes mechanical and electrical testing:

Insertion/withdrawal force

Contact resistance

Card detection switch testing

Durability test up to 10,000+ cycles

Qualified parts are packed in tape & reel, tray, or customized packaging options to support SMT assembly or hand-mount applications.

15+ years connector manufacturing

Full in-house tooling, stamping, molding, and automation

Support for SIM, Nano SIM, Micro SIM connectors

Telecom-grade reliability and fast delivery

OEM/ODM customization available