Firma 120A Black Edition Brushless Smart ESC 3S-4S

The Spektrum Firma 120 A Black Edition Smart ESC is a waterproof brushless power unit designed for 1/8‑scale surface vehicles. Compact yet powerful, it delivers telemetry, programmable settings, and full forward‑brake‑reverse drive—all integrated into one robust, track‑ready package.

Features

• 120 A continuous Smart ESC with real‑time mobile telemetry via one‑wire SRXL2 output
• Integrated braking and motor reversing capability
• Dual IC5 battery connector and 4 mm bullet output—compatible with Smart batteries and EC5
• Selectable 6 V or 7.4 V @ 4 A BEC to power accessories
• Waterproof, dustproof housing rated to IP 67
• 32‑bit ARM M4 processor ensures fast response and precise control
• Multiple programmable settings via the Smart ESC Programmer Box, SmartLink app, or onboard button
• Supports programmable features including drag brake, timing, cut‑off voltage, fail‑safe and more

What’s in the box

• Firma 120 A Smart ESC (black edition)
• Spektrum Smart sticker sheet
• Product manual

Needed to complete

• Compatible surface receiver (Spektrum SLT/DSMR/DSMX)
• Spektrum Smart LiPo or standard LiPo battery (2S–4S) with IC™ or EC™ connector
• Spektrun, DX5 Pro or other compatible transmitter

Specifications

• Maximum continuous current: 120 A
• Burst current: approximately 760–830 A
• Input voltage: 3S–4S LiPo (11.1–14.8 V) or 8–12 cell NiMH
• BEC output: 4 A @ selectable 6 V or 7.4 V
• Dimensions (L×W×H): approx. 43 mm × 39 mm × 34 mm (1.7″ × 1.53″ × 1.33″)
• Weight: approx. 153 g (5.4 oz)
• Connector types: Dual IC5 input, 4 mm bullet motor output
• Drive modes: Forward‐brake, forward‐reverse with brake
• Brake function: Delay mode supported
• Programmable: Yes (via button, programming box or SmartLink app)
• Auto cut‑off: Yes
• Overload protection: Yes
• Technology: Spektrum Smart with SRXL2 telemetry
• Water-resistant: Yes (IP67-rated)