HAKRC 5139 F405 90A Stack – 2–8S 32Bit 4-in-1 90A ESC + STM32F405 Flight Controller

The HAKRC 5139 F405 90A Stack is a high-performance 2–8S flight controller and ESC combo engineered for FPV pilots who demand powerful current handling and responsive control. Combining the reliable STM32F405RGT6 flight controller with a 90A continuous / 100A peak 4-in-1 ESC, this stack is ideal for freestyle, long-range, and high-load drone builds.

🔧 Flight Controller Specifications (F405 FC)

⚙️ ESC Specifications (HAKRC 5139 90A 4-in-1 ESC)

🔍 Hardware Highlights

• ✅ 8-layer 3oz thickened copper PCB for excellent heat dissipation and overcurrent resistance

• ✅ Imported 40V high-current MOSFETs for durability under high loads

• ✅ Industrial-grade LDOs ensure reliable performance in harsh conditions

• ✅ Murata Japanese capacitors deliver strong power filtering and low-noise operation

📦 What’s Included in the HAKRC 5139 F405 90A Stack

• 1x STM32F405 Flight Controller

• 1x 90A 32Bit 4-in-1 ESC

• Shock-absorbing grommets

• Signal cables

• Power leads and XT60 connector

• 470uF capacitor

• Mounting screws and nuts

• User Manual

📌 Ideal For

This stack is ideal for 5-inch to 7-inch FPV drones, high-current cinematic platforms, or long-range cruisers that require reliable 2–8S power and robust 90A current output.