EMAX Simon Series 12A 2-4S SimonK ESC with 5V BEC

The EMAX Simon Series 12A is a brushless ESC running SimonK firmware, sized for small multirotors on 2–4S LiPo whose motors draw no more than 12 A each. A built-in linear BEC supplies 5 V at 1 A for a receiver or flight controller, so simple builds need no separate regulator.

Key features

• 12 A continuous, 15 A burst for up to 10 seconds
• Linear BEC, 5 V / 1 A, on a regulator separate from the MCU supply for better resistance to interference
• Low-voltage cut-off, over-temperature protection and a power-on self test
• Throttle range calibration to suit different receivers, with smooth low-speed response
• Settings adjustable with a programming card or from the transmitter
• Maximum speed 210,000 rpm (2-pole), 70,000 rpm (6-pole), 35,000 rpm (12-pole)

Specifications

• Continuous current: 12 A
• Burst current: 15 A (10 s)
• Input: 2–4S LiPo
• Firmware: SimonK
• BEC: Linear, 5 V / 1 A
• Dimensions: 45 x 20 x 8 mm
• Weight: 10 g

When several of these ESCs share one power distribution board, use the BEC red wire from only one of them and isolate the rest so the linear regulators don't work against each other. Calibrate the throttle range on every ESC before the first flight.