Custom Intermediate Relay Solution LL3C-L 10A 3PDT PCB Socket Flange Mount Design Support for Industrial Automation

Custom Intermediate Relay Solution — LL3C-L Series

We do more than supply relays. We engineer relay solutions around your application requirements — custom coil voltage, tailored contact configuration, optimized mounting interface, and integrated protection features. From component selection to system-level optimization, our engineering team partners with you to improve both performance and cost efficiency.

LL3C-L Base Specifications

Beyond Standard Relay Supply

• Custom Relay Design — We tailor coil voltage, contact material (AgCdO, AgSnO2, AgNi), terminal type, pin layout, and packaging to your exact specification. Not a single parameter is off-limits. Custom silk-screen labeling and OEM branding supported.
• Solution-Level Engineering — Our applications team works with your R&D to integrate the relay into your product — PCB footprint optimization, coil drive circuit review, surge protection strategy, and thermal derating analysis. We deliver a validated relay subsystem, not just a component.
• Performance Optimization — Contact material upgrade for higher inrush current, sealed construction for harsh environments, gold-flash contacts for low-level signal switching. We identify the right configuration to extend relay life and improve reliability in your specific use case.
• Cost Optimization — Alternative pin-compatible designs, domestic coil substitution, value-engineered contact material, and volume-based connector/terminal consolidation. Our procurement and engineering teams collaborate to reduce BOM cost without compromising performance.

Typical Applications

Whether you need a drop-in replacement with a custom coil voltage or a complete relay subsystem validated for your industrial product — we deliver engineering, not just components. Contact us with your relay requirements for a technical proposal within 48 hours.

Your China Product Development & Manufacturing Partner

We help global companies turn ideas into market-ready products by combining engineering expertise, manufacturing capabilities, and China's complete industrial supply chain ecosystem.

With over 15 years of experience in international trade, electronics, and product development, we have built extensive knowledge across multiple industries, including smart consumer electronics, smart home appliances, automotive electronics, energy products, electronic components, and customized hardware solutions.

Unlike traditional suppliers focusing on a single product category, we provide a flexible and integrated approach to support customers throughout the entire product lifecycle — from concept development and engineering optimization to manufacturing and global delivery.

From Product Concept to Mass Production

Whether you are launching a new product, upgrading an existing product, or looking for a more competitive supply chain solution, we help transform ideas into reliable and scalable products.

Our product experience covers:

Smart Consumer Electronics

Smart Home & Appliances

Energy & Power Products

Electronic Hardware & Components

Integrated Engineering & Manufacturing Capabilities

We support customers with a complete product development and manufacturing process, including:

Electronic Engineering

• Component selection and sourcing
• Hardware architecture design
• PCB and PCBA development
• Control board solutions
• BOM analysis and cost optimization

Mechanical Development

• Product structure design
• 3D modeling and prototyping
• Mold development
• Injection molding and mechanical parts production

Manufacturing & Assembly

• PCB assembly (SMT/DIP)
• Product assembly
• Functional testing
• Quality control
• Packaging development

Certification & Global Delivery

• Product testing and certification support
• Packaging solutions
• Export coordination
• International logistics management

Leveraging China's Complete Supply Chain Advantage

Based in Shenzhen, one of the world's leading electronics and manufacturing hubs, we are connected with a wide network of qualified suppliers, engineering teams, and manufacturing partners.

By integrating resources across components, electronics, mechanical manufacturing, and production, we help international companies reduce development complexity, optimize product performance, lower costs, and accelerate time to market.

More Than a Supplier — Your Long-Term Product Partner in China

Our goal is to become a trusted extension of your team in China.

Whether you have an innovative idea, an existing product that needs improvement, or a supply chain challenge that needs to be solved, we provide the engineering support, manufacturing resources, and supply chain expertise needed to bring better products to the global market.