Radio systems and receivers: choosing a reliable control link
Channels, receiver protocols, telemetry, range, redundancy and what to check before matching a transmitter to a model.
Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo is an RC product from Spektrum. This page focuses on what an end customer needs: fit, use cases, specifications and imagery, without prices or outbound supplier detours.
Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo fits customers looking for Spektrum items in Spektrum Catalog, Spektrum ESCs, Spektrum Surface Electronics, with RC-MODEL support for choosing the right configuration.
Firma 85A Brushless Smart ESC / 3300Kv Sensorless Motor Combo is a Spektrum product intended for surface RC vehicles, crawlers, bashers and race setups that need dependable Spektrum control electronics. This page presents the practical buying information a customer needs before ordering: fit, SKU, image, category, specifications and usage advantages.
The content is written for purchasing through RC-MODEL, without supplier prices or links to competing stores.
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
Channels, receiver protocols, telemetry, range, redundancy and what to check before matching a transmitter to a model.
A practical binding guide for matching protocol, bind mode, receiver power, model memory, control checks and common binding mistakes.
Failsafe setup for electric and fuel aircraft: throttle behavior, receiver signal loss, switch positions and safe verification before flight.
Make an aircraft calmer for beginners by setting low rates, high rates and expo without hiding mechanical setup problems.
Ground checks, takeoff planning, trim passes, battery timing and first landing strategy for a new or repaired RC aircraft.
| Technical Specifications | |
| Manufacturer | Spektrum |
| Brand | Spektrum |
| Product Code | SPMXSEMC01 |
| Spektrum Category | Cars & Trucks / Parts, Electronics & Accessories / Electronic Speed Controls |
| Connector Type | IC3 |
| Product Family | Spektrum telemetry and sensor range |
| Application | Surface |
| Compatibility Focus | Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering. |
| Battery Type | LiPo (3.7V per cell) |
| Adjustable Timing | No |
| Auto Cutoff | Yes |
| BEC | Yes |
| BEC Maximum Burst Current | 8A |
| BEC Type | Switch Mode |
| BEC Voltage | 6V/7.4V |
| Brakes | Yes |
| Forward | Yes |
| Input Voltage | 2-3S LiPo, do not exceed 3S (11.1V) with this motor |
| Maximum Continuous Current | 33A |
| Motor Output Lead | 4 |
| Product Height | 1.3" (33 mm) |
| Product Length | 1.7" (43 mm) |
| Product Weight | 0.255 |
| Product Width | 2.1" (53 mm) |
| Programmable | Yes |
| Reverse | Yes |
| Technology | Smart |
| Amperage | 80A - 99A |
| BEC Continuous Current | 4 |
| Low-Voltage Cutoff Programmable | Yes |
| Motor Type | Brushless |
| Water-Resistant | Yes |
| Wire Gauge | 12 AWG |
| Product Application | Surface |
| ESC Type | Brushless |
| Part Type | Electronics |
| Output | 430W(2S), 780W(3S) |
| Number of Poles | 4 |
| RPM/Volt (Kv) | 38,400 @ 12V |
| Drive Type | Forward/Brake/Reverse |
| Outer Diameter | 1.41" (36 mm) |
| Shaft Diameter | 0.125" (3 mm) |
| Motor Design | Inrunner |
| Maximum Burst Current | 550A |
| Max Input Voltage | 11.1V |
| Battery Input Lead | IC3 |
| Programming Options | Button, Programming Box, Smartlink App, On Screen Text Gen |
| Motor Class | 1/10 Scale |
| Constant Wattage | 750-999W |
| Integrated ESC | No |
| Kv Rating | 3000Kv or more |
| Sensor Type | Sensorless |
| Sensored | No |
| Time Delay Brake | Yes |
| Efficiency | 82% |
Tags: Spektrum, SPMXSEMC01, Spektrum telemetry and sensor range, Spektrum Catalog, Spektrum Smart Technology, Spektrum ESCs, Spektrum Surface Electronics, RC-MODEL
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