Firma 2-in-1 Brushless ESC & 2300Kv Motor Combo

The Spektrum Firma Sensored 2-in-1 System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control, all while being fully waterproof.

The compact 2-in-1 design grants builders the ability to reduce clutter and components, giving you the most room for scale accessories and customization. The integrated design makes the size similar to a 550 can size motor, making it a easy drop-in option for most 1/10 scale crawler, scaler and trailer models.

Available in a low speed 1400Kv option for extreme slow speed and high angle of attack performance. And a high speed 2300Kv for excellent control for trailers and rock bouncers.

Pro-level Drag Brake performance and adjustability

RPM/Throttle Matching enabled

FOC (Field-Oriented Control) equipped

Integrated 40-amp ESC (160amp burst)

2-3S LiPo/6-9 Cell NiMH input voltage range

Industry Leading Waterproof Design

Fully programmable with optional Spektrum ESC Programmer Box (not included)

Developed and designed by Spektrum™ engineers, in partnership with the industry's leading ESC and Brushless Motor manufacturer

Compact for easy installation in most applications

Ready to install — no soldering required

Adjustable high-power BEC (6V or 7.4V)

Firmware updatable through the Spektrum ESC Programming Box

High heat resistant IC3 connectors, backwards compatible with EC3 connectors

Limited 1-year warranty

Application: 1/10 Rock Crawler

Auto Cutoff: Yes

BEC Voltage: 6V/7.4V Adjustable, Continuous Current 4A (Switch Mode)

Connector Type: IC3

Forward: Yes

Input Voltage: 2-3S LiPo, 6-9 Cells NiMH

Maximum Burst Current: 160A

Maximum Continuous Current: 40A

Motor Size: 550-Size

Motor Type: Brushless

Number of Poles: 4

Outer Diameter: 1.46" (37 mm)

Overload Protection: Yes

Product Application: Crawling, Surface

Product Length: 2.28" (58 mm)

Product Weight: 201g (including wire plug)

Programmable: Yes

Reverse: Yes

RPM/Volt (Kv): 2300Kv

Sensored: Yes

Shaft Diameter: 0.125" (3 mm)

Shaft Length: 0.63" (16 mm)

Water-Resistant: Yes

Brand: Spektrum

MPN: SPMXSEM1040B

Added: 2025 - June

Status: Non-Stock Feb26

Discount Eligibility: Discount Eligible

SKU: SPMXSEM1040B

UPC: 605482769089

Location: Store