Firma 100 Amp Brushless Smart ES (SPMXSE1100)

Firma 100 Amp Brushless Smart ESC is a high-performance electronic speed controller for 1/10th to 1/8th scale 4WD RC cars running on 3S LiPo packs. It blends power regulation with one-wire telemetry, sending data like RPM, battery voltage, temperature, and remaining capacity in real time to a compatible Spektrum transmitter so you can monitor the vehicle’s health and performance on the fly.

Powered by a fast 32-bit ARM M4 processor, this waterproof ESC supports multiple programming options—button programming, the Smart ESC Programming Box, or a PC-based SmartLink USB app—and provides multi-point protections such as over-current, LiPo low-voltage cutoff, thermal protection, and failsafe. A high-current BEC (6V or 7.4V up to 4A), a compact aluminum heat sink, cooling fan, and a rugged enclosure with mounting tabs make installation straightforward in most setups. It uses high-heat IC connectors and remains backwards compatible with EC3/EC5 battery connectors, simplifying integration with Spektrum Smart batteries. Firmware updates are available through the programming box, and the package includes the ESC, a sticker sheet, and a user manual.