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| Brand Name: | XSW PCB |
| Model Number: | XSW-PWR3 |
| MOQ: | 1 Piece |
| Price: | Negotiable |
| Payment Terms: | T/T, Western Union, PayPal |
| Supply Ability: | 1 Million Square Feet per Month |
This heavy copper power PCB is purpose-built for drone electronic speed controllers (ESC), motor drivers and battery management boards. Featuring 3 oz outer copper, 2 oz inner copper and depth-controlled back drilling, it delivers the high current carrying capability and low thermal resistance demanded by high-power UAV propulsion systems.
| Layer Count | 4-Layer (heavy copper power stack-up) |
| Material | FR-4 High-Tg 170 |
| Board Thickness | 1.6 mm (Customizable 1.0-3.2 mm) |
| Outer / Inner Copper | 3 oz / 2 oz (up to 6 oz on request) |
| Min Line Width / Spacing | 0.15 mm / 0.15 mm |
| Back Drilling | Depth-controlled, stub length < 0.2 mm |
| Thermal Vias | Copper-filled thermal via arrays |
| Solder Mask | Green |
| Surface Finish | HASL Lead-Free |
3 oz copper is electroplated with consistent thickness across the whole panel, using optimized shield and current density to avoid over-plating and under-plating that cause uneven current paths.
Etching 3 oz copper demands tight side-etch control to protect fine features and minimize undercut, keeping trace width within tolerance for predictable current rating.
Back drilling removes via stubs to a controlled depth (< 0.2 mm stub) with high positional accuracy, reducing signal reflection and preventing copper burrs inside the via barrels.
Copper-filled thermal vias and heavy copper planes are combined to pull heat away from power MOSFETs, keeping ESC junction temperatures under control during aggressive throttle.
Uniform solder mask coating is achieved over the raised heavy copper surface, preventing mask skip, bubbles and exposed copper that lead to short risks during assembly.
| Application | Drone ESC, brushless motor driver, BMS and power distribution boards |
| Current Capability | Designed for high-current propulsion and power conversion circuits |
| Assembly Service | SMT assembly with high-mass soldering and selective solder available |
| Testing | Flying probe, thermal cycling, AOI and 100% electrical test |
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