Firma 120A Black Edition Brushless Smart ESC (SPMXSE2120)

Firma 120A Black Edition Brushless Smart ESC is a 120-amp electronic speed controller designed for Spektrum's Smart ecosystem. It does more than regulate motor power—it acts as a smart control hub, streaming essential telemetry directly to your radio in real time. One-wire telemetry delivers RPM, battery voltage and capacity, temperature, and other vital data without extra wires or modules, keeping you connected to your vehicle on the fly. Built to withstand challenging conditions, the waterproof design makes it a reliable choice for 1/8-scale surface models running on 4S LiPo packs.

Inside, a fast 32-bit ARM M4 processor powers precise motor control and high-resolution telemetry. The unit arrives in a compact plastic case with mounting tabs, complemented by an aluminum heat sink and cooling fan to maintain efficiency under load. Multi-point protection—over-current, automatic LiPo low-voltage cutoff, thermal, and failsafe—helps safeguard electronics during tough sessions. It supports IC3/IC5 connectors and offers flexible programming options, including button programming, the Smart ESC Programming Box, and the Smart Link USB PC app for firmware updates, making it well suited for 4S setups in 1/8-scale vehicles and delivering a 6V or 7.4V BEC up to 4A to power on-board electronics.