Spektrum RC Firma 4S 120 Amp Brushless Smart ESC

Firma Smart ESCs do much more than regulate power. They function like a virtual engineer inside your model, providing a direct path to the vital operating data you need to reach peak performance. Firma Smart ESCs give you an extra layer of confidence that your electronics are all operating at their best.

With Firma Smart ESCs, you'll be better connected to your vehicle than ever before — without installing extra components that all work independently of each other. You won't need extra wires, modules, or links. A Firma electronic speed control provides a one-wire solution for obtaining telemetry data such as RPM, temperature, battery voltage and capacity.

Firma ESCs not only gather the data but also send it to your transmitter in real time, instead of only storing it for after-run study. You're able to adjust settings as needed to boost performance on the go. The Firma Smart single-wire telemetry solution has been tested for quality and performance by the best brands in RC. Their verdict? Smart technology is both simpler and superior!

• Smart all-in-one telemetry
• Fast, powerful 32-bit ARM M4 processor
• Waterproof
• Multiple options for easy programming:
• Button programming
• Smart ESC Programming Box
• SmartLink USB Updating and Programmer application
• Multi-point protection:
• Over-current protection
• Automatic LiPo low-voltage cutoff
• Thermal protection
• Failsafe protection
• Developed and designed by Spektrum™ engineers, in partnership with the industry's leading ESC manufacturer
• Ideal for 1/8th scale surface applications running on 4s Lipo setups
• High current adjustable BEC (6v or 7.4v @ 4 Amps)
• Compact for easy installation in most applications
• Ready to install — no soldering required
• Rugged plastic case with mounting tabs
• Aluminum heat sink for high efficiency
• Cooling fan
• Adjustable high-power BEC
• Firmware updatable through the Smart ESC Programming Box
• High heat-resistant IC™ connectors, backwards compatible with EC™ connectors
• Limited 1-year warranty

Auto Cutoff: Yes

Battery Type: LiPo (3.7V per cell)

BEC Continuous Current: 4A

BEC Voltage: 6 and 7V selectable

Brakes: Yes

Connector Type: IC5

Drive Type: Forward/Brake/Reverse

Input Voltage: 6.0V - 14.4V (2-4S LiPo, 5-12 cell NiMH)

Low-Voltage Cutoff Programmable: Yes

Maximum Burst Current: 830A

Maximum Continuous Current: 120A

Motor Connector: 4mm Female Bullet

Overload Protection: Yes

Product Height: 1.33" (34 mm)

Product Length: 1.7" (43 mm)

Product Weight: 0.337lbs (153g)

Product Width: 1.53" (39 mm)

Programmable: Yes

Reverse: Yes

Technology: Smart

Time Delay Brake: Yes

Water-Resistant: Yes

• (1) Spektrum™ Firma™ Smart ESC
• (1) Spektrum Smart sticker sheet
• (1) Product Manual

• Spektrum™ Surface Receiver
• Spektrum Smart Technology LiPo Battery
• Spektrum Transmitter