FIRMA 85A BL Smart ESC/3300Kv Se (SPMXSEMC01)

Spektrum Firma 85A Smart ESC and 3300Kv Brushless Motor Combo provides a complete power system for 1/10-scale four-wheel-drive RC cars. It pairs an 85A Firma Smart electronic speed control with a 3300Kv brushless sensorless motor to deliver crisp, high-torque power on 3S LiPo packs. As part of the Firma Smart ecosystem, the ESC streams real-time telemetry to a compatible Spektrum radio via a one-wire connection, giving live RPM, voltage, temperature, battery data, and more to help tune performance on the fly.

Designed for easy installation, this compact unit sits in a rugged plastic case with mounting tabs and includes an aluminum heat sink and cooling fan to keep temperatures in check. The high-current BEC is adjustable (6V or 7.4V up to 4A) to power the receiver and servos, and the system is waterproof for all-weather use. Multiple programming options are supported—from button programming to the Smart ESC Programming Box to the Smart Link PC app—plus firmware updates to keep features current. The package uses high-heat IC connectors and remains backward compatible with EC3/EC5 battery connections. The box includes the Firma Smart ESC, a sticker sheet, and a manual. To complete the setup, pair it with a Spektrum Smart receiver, a Spektrum Smart LiPo battery, and a compatible transmitter.