Drone ESC PCBA
Product Specifications
Drone ESC PCBA
E60-V2 | 60A Continuous / 70A Peak | BLHeli_S | DSHOT 600 | EFM8BB21F16G MCU | 5×6 MOS | 2-6S Lipo
Product Overview
The E60-V2 is a high-current electronic speed controller (ESC) designed for FPV racing and freestyle drones. It drives brushless motors at up to 60A continuous current per channel, with a 70A peak rating under 6S Lipo input. The ESC uses a Silicon Labs EFM8BB21F16G MCU running BLHeli_S firmware with DSHOT 600 digital protocol support. Superb Automation provides full turnkey PCBA for the E60-V2 — including MOS tube thermal design, high-current PCB copper weight management, and full-load motor drive testing.
Product Specifications
| Model | E60-V2 |
| Continuous Current | 60A |
| Peak Current | 70A (at 6S) |
| Input Voltage | 2-6S Lipo |
| MCU | Silicon Labs EFM8BB21F16G, 48 MHz |
| MOS Tube Package | 5×6 (large-pad power MOSFET) |
| BEC Output | No (OPTO — external BEC required) |
| Firmware | BLHeli_S |
| Protocol | DSHOT 150 / 300 / 600 |
| PCB Size | 37×42.7 mm |
| Mounting Hole | M3, 30.5×30.5 mm |
| Weight | 14 g |
PCBA Manufacturing Challenges
1. High-Current Power Stage Soldering
The E60-V2 uses 5×6 package power MOSFETs handling up to 70A peak per motor channel. The large drain/source pads act as both electrical and thermal paths — solder voiding or insufficient wetting on these pads creates hot spots that cause ESC failure under sustained load. Superb Automation uses thick stencil apertures (0.15 mm and above) with stepped stencil design for the power stage, and X-ray inspection to verify solder coverage exceeds 75% on all power pads.
2. Copper Weight & Thermal Management
At 60A continuous current, the PCB must carry substantial current with minimal IR drop and temperature rise. We use 3 oz or 4 oz outer-layer copper on the power stage area, with thermal vias under each MOS tube to conduct heat into inner ground planes. The PCB stackup is designed with dedicated inner power layers to spread current and dissipate heat across the board area.
3. EFM8BB21 MCU Programming
The Silicon Labs EFM8BB21F16G is an 8051-based MCU in QFN package. It must be programmed with BLHeli_S firmware via the C2 debug interface after assembly. Superb Automation performs in-circuit programming with verification — each ESC is confirmed to respond to DSHOT 600 throttle signals before leaving the production line.
4. Full-Load Motor Drive Test
Each assembled ESC is tested with a brushless motor load at rated current to verify: startup from zero RPM, smooth throttle response across the full range, no MOSFET shoot-through, and temperature rise within specification after sustained full-throttle operation.
Superb Automation Assembly Capabilities — ESC
| MOS Tube Soldering | 5×6 power MOSFET — thick stencil (0.15 mm+), nitrogen reflow, X-ray inspection ≥75% pad coverage |
| Copper Weight | 3-4 oz outer layers on power stage area — thermal vias under each MOS tube |
| MCU Programming | EFM8BB21F16G — C2 in-circuit programming with BLHeli_S firmware, read-back verification |
| Current Sensor | Shunt resistor or hall-effect sensor soldering — calibrated for current telemetry output |
| Capacitor Assembly | Low-ESR electrolytic capacitor at power input — anti-vibration mounting, polarity verified |
| Motor Pad Soldering | Large-pad motor output pads — adequate solder volume for high-current connection |
| Functional Test | Motor drive test at rated load: startup, throttle sweep, DSHOT 600 communication, temperature monitoring |
| Conformal Coating | Optional — moisture-resistant coating for wet grass / light rain racing conditions |
Ordering Options
| Mode | Service |
| PCB Only | Bare ESC PCB — 4-layer, 3-4 oz copper, ENIG or OSP finish |
| PCBA Turnkey | Full assembly with component procurement — MOS tubes, MCU, capacitors, connectors. Includes BLHeli_S programming and load test |
| Custom ESC PCBA | Customer provides design — Superb handles fabrication and assembly. Supports custom current ratings, MOSFET selection, and protocols |
Send your ESC Gerber and BOM to pcba@superb-tech.com for a free DFM review and quotation.