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

Introduction

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.

Tooling & Mold Development

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.

High-Precision Stamping

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.

Surface Plating

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.

Injection Molding

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.

Automated Assembly

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.

Functional Testing

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

Final QC & Packaging

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

Why Choose MOARCONN?

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

Recommended Product: Looking for a reliable SIM connector for your project? MOARCONN's SIM Card Connector 6pin With 2 Detection Pins Push-PushTop Mount Height 1.80mm — 6 signal contacts plus 2 card-detection pins, push-push top mount, 1.80mm low profile. Contact us for datasheets, free samples and custom options.

MOARCONN Quality Anchors

Every MOARCONN card socket connector is validated to 10,000 mating cycles (tested to GB/T 5095.7-1997; over 2× the 3,000–5,000 cycles common in the industry), operates from -45°C to 80°C, and ships with contact resistance ≤30mΩ thanks to ≥0.025µm gold-plated phosphor-bronze terminals. IATF 16949 certified production supports 0 MOQ orders with 7-day sampling and a 25-day development cycle — backed by in-house mold, stamping and injection molding factories and 32 granted patents.

Related Reading

• SIM Card Pinout: C1–C8 Functions & Wiring
• SIM Card Connector Product Line
• Custom Card Socket Connector Service