Smart Card Connectors, Rocker Switches, Terminal Blocks - KLS

About KLS Electronics

Engineered for Reliability, Built for Global Markets

KLS is a leading manufacturer of electronic connectors and components based in China, serving industries worldwide with precision-engineered solutions. With years of experience and a commitment to innovation, we specialize in smart card connectors, terminal blocks, RF coaxial connectors, USB interfaces, waterproof circular connectors, and more.

Our products are widely used in telecommunications, industrial automation, LED lighting, automotive systems, medical devices, and consumer electronics. We adhere to strict quality standards and hold certifications including Bureau Veritas, ensuring every component meets international performance and safety requirements.

Over 10 years of manufacturing expertise
ISO & Bureau Veritas certified production
Exported to 50+ countries globally
Custom design and OEM/ODM support

Our Product Range

High-Quality Connectors for Every Application

Smart Card Connectors

Reliable SIM, Micro SIM, Nano SIM, and memory card connectors with gold-plated contacts, low insertion force, and long lifecycle.

• Supports ISO 7816 standards
• SMT & through-hole mounting
• 10k+ insertion cycles

Terminal Blocks

PCB, pluggable, screwless, spring clamp, and DIN-rail terminal blocks for secure wire connections in industrial systems.

• 2.5A to 40A current ratings
• Flame-retardant housing
• UL & CE certified

USB Type-C & 3.1 Connectors

High-speed reversible USB-C connectors supporting USB 3.1 Gen 1/2, PD charging, and 4K video transmission.

• 10,000+ mating cycles
• Shielded for EMI protection
• SMT & through-hole options

RF Coaxial Connectors

SMA, SMB, MCX, MMCX, Fakra, BNC, N-type, and U.FL connectors for high-frequency signal transmission.

• Up to 6 GHz frequency support
• 50Ω & 75Ω impedance
• Gold-plated center contacts

IP68 Waterproof Connectors

M8, M12, M20, and custom circular connectors with IP67/IP68 ratings for harsh environments.

• Metal & plastic housing options
• 3–24 pin configurations
• Vibration & corrosion resistant

Ethernet & Modular Connectors

RJ45 modular jacks with and without transformers, SFP, QSFP, and keystone jacks for networking.

• CAT5e, CAT6, CAT6A support
• Shielded & unshielded versions
• LED indicators available

D-Sub & High-Current Connectors

Standard and high-current D-Sub, DIN41612, and Future Bus connectors for industrial and power applications.

• Up to 15A per contact
• Metal hoods for EMI shielding
• 9–50 pin configurations

LED Lighting & Waterproof Junctions

Waterproof connectors, splice terminals, and junction boxes designed for outdoor and industrial lighting.

• IP67/IP68 rated
• UV-resistant materials
• 12–48V DC compatible

View Full Product Catalog

Why Choose KLS?

Superior Quality, Global Support, and Engineering Excellence

Certified Quality

Bureau Veritas, ISO, and RoHS compliant manufacturing ensures reliability and safety.

Wide Product Range

Over 5,000 connector types across 20+ categories for diverse industrial needs.

Global Distribution

Serving customers in North America, Europe, Asia, and beyond with fast delivery.

Custom Solutions

OEM/ODM support with engineering assistance for tailored connector designs.

Frequently Asked Questions

What certifications do KLS products have?

KLS holds Bureau Veritas certification, and our products comply with ISO, RoHS, and REACH standards. Many connectors are UL and CE marked.

Can you provide custom connector designs?

Yes, we offer full OEM/ODM services with engineering support for custom pin configurations, housings, and performance requirements.

What is the typical lead time for orders?

Standard products: 2–4 weeks. Custom designs: 4–8 weeks depending on complexity. Samples available within 1–2 weeks.

Do you offer waterproof and ruggedized connectors?

Yes, we manufacture IP67 and IP68 rated M8, M12, circular, USB, and D-Sub connectors for harsh environments.

What markets do you serve?

We serve industrial automation, telecommunications, LED lighting, automotive, medical, consumer electronics, and smart metering industries.

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