EMAX BLHeli 30A ESC

The EMAX BLHeli 30A Single ESC is a traditional standalone speed controller suited for fixed-wing RC planes, custom robotics, and legacy 250-class mini quads or 450-class multirotor builds. Unlike modern drone 4-in-1 boards, this ESC features an integrated 5V/2A BEC, allowing you to power a receiver, servos, or a flight controller directly without wiring up an external step-down voltage regulator.

Key features

• Delivers 30A continuous current and handles 40A bursts for up to 10 seconds.
• Integrated 5V/2A BEC supplies direct power to onboard electronics.
• Flashed with original BLHeli firmware on a SiLabs MCU for linear, predictable throttle response.
• Programmable via standard transmitter stick commands or a BLHeli programming card.

Specifications

• Continuous Current: 30A
• Burst Current: 40A (10s)
• Input Voltage: 2-4S LiPo
• BEC Output: 5V/2A
• Firmware: BLHeli
• Dimensions: 52 x 26 x 7 mm
• Weight: 28g (including pre-soldered wires)

Measuring 52mm in length and weighing 28g with its silicone wiring, this ESC requires adequate mounting space. It is typically heat-shrinked and strapped directly to the arms of larger multirotors, or mounted inside the fuselage of fixed-wing aircraft where airflow can aid cooling.