HAKRC BLS 25A 4-in-1 ESC for FPV Drone – 20x20mm, 2–6S LiPo, BLHeli_S Firmware, DShot600 Support

The HAKRC BLS 25A 4-in-1 ESC is a compact and efficient electronic speed controller tailored for micro FPV racing drones. It delivers 25A continuous and 30A burst current across 4 channels and is designed to handle up to 2–6S LiPo input, making it ideal for powerful micro builds requiring a 20x20mm mounting solution.

This ESC features a high-frequency EMF8BB21F16G 48MHz MCU, high-quality MOSFETs, and 3-in-1 FD6288Q IC drivers, ensuring smooth throttle response and reliable motor control. The 4-layer PCB uses 2oz copper, and the dual-pad soldering design with metallized edges significantly enhances durability and heat dissipation.

Key Features

• Processor: EMF8BB21F16G @ 48MHz

• Firmware: BLHeli_S (GH30, BLHeliSuite programmable)

• Input Voltage: 2–6S LiPo

• Continuous Current: 25A per channel

• Burst Current: 30A

• Mounting Dimensions: 20×20mm (M3 hole, spacing 20x20mm)

• Size: 32×30mm

• Weight: 5.3g (ESC only), 12.6g (packaged)

• Firmware Version: G_H_20 – Rev. 16.7 – Multi

Supported Protocols

• Analog: PWM, OneShot125, OneShot42, MultiShot

• Digital: DShot150 / DShot300 / DShot600

Advanced Technology

• Damped Light Braking: Regenerative braking for sharper deceleration and power recovery.

• Hardware PWM Drive: Reduces noise and improves throttle response smoothness.

• High Integration: SMT components in a compact footprint ideal for 2–4 inch FPV drones.

• High Quality Build: Gold-plated PCB edges prevent pad detachment, while ceramic capacitors enhance voltage filtering.

Applications

Perfect for micro quads and racing drones requiring precise motor control, lightweight ESCs, and 2–6S voltage range in tight builds. Ideal for builders prioritizing durability, compactness, and full BLHeli_S tuning compatibility.