HMLV : IPC Class 3 Reliability for Critical Applications | Get More by Less

Shenzhen KnownPCB HMLV facility specializes in IPC Class 3 Heavy Copper PCBs (up to 20 oz) for EV, Motor Drives, and critical power electronics. Get the fail-safe reliability large fabs reject. Accelerate your NPI.

The NPI Engineer's Edge: High-Mix, Low-Volume PCBs Built to Fail-Safe Standards.

The Reality: Your cutting-edge industrial or EV design is complex. It requires specialized power handling (Heavy Copper) but in low-to-mid volume. Large commodity fabs routinely reject these critical runs, forcing you to compromise on quality or timeline.

The HMLV Solution: We are your dedicated High-Mix, Low-Volume (HMLV) facility, purpose-built to execute the demanding designs that the giants won't touch. We accelerate your NPI cycle by delivering IPC Class 3 reliability—the highest standard—from prototype to pilot production.

🛠️ Beyond IPC Class 2 – The IPC Class 3 Guarantee

When system downtime is not an option, you need the IPC Class 3 standard. We don't just aim for reliability; we mandate it through stringent manufacturing protocols.

Reliability Focus	IPC Class 3 Standard (Our Commitment)	Why It Matters for Power/EV
Operational Life	Highest Reliability. Designed for continuous, on-demand performance.	Essential for EV chargers, motor drives, and long-life industrial automation.
Plating Integrity	No Annular Ring Breakout. Requires tighter drill-to-pad tolerance and heavier plating.	Prevents trace separation under high thermal stress and current load.
Solder Joints	Mandates near-perfect component-to-pad coverage.	Crucial for high-vibration environments and preventing failure in power stages.

Simply put: IPC Class 3 is the fail-safe benchmark for military, aerospace, and critical industrial electronics. We apply this rigorous standard to every Heavy Copper and Metal Core board we produce for your system.

Heavy Copper & Power Handling Mastery

Your high-amperage applications require proven expertise in managing both current density and thermal dissipation—factors that directly impact IPC Class 3 compliance.

Technical Specialization	Your Solution for Power Reliability
Heavy Copper Expertise (4 oz to 20 oz):	Flawless fabrication of ultra-thick copper layers for superior current capacity and heat distribution in industrial bus bars and EV Battery Management Systems (BMS).
Metal Core PCB (MCPCB) Solutions:	Custom-engineered MCPCBs for essential thermal management in high-wattage power supplies. We ensure effective heat dissipation, protecting sensitive components and extending system lifespan.
UL-Certified Processes & Materials:	We strictly use UL-certified processes and High-TG materials, streamlining your final product certification for the US market and ensuring thermal integrity.

The NPI Accelerator – HMLV Service Model

As an NPI Engineer, the speed, flexibility, and proactive engineering support are indispensable to every project—not the roadblocks of high-volume giants. Our HMLV model is optimized to fast-track your development cycle:

Rapid Prototyping : We streamline complex, high-layer-count designs into quick-turn prototypes without sacrificing the IPC Class 3 standard.
Engineering Partnership: Our dedicated NPI team provides comprehensive DFM (Design for Manufacturability) analysis upfront. We flag potential production issues before your prototype run, saving you costly design re-spins and months of delay.
Flexible Ordering: We are perfectly sized for orders ranging from 5 to 500 units, matching your R&D and pilot production phases. You get top-tier quality without the burdensome Minimum Order Quantity (MOQ) penalties typically imposed on complex, low-volume designs.