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 70A Brushed Smart ESC, 2S-3S: IC3 / 35T Brushed 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 70A Brushed Smart ESC, 2S-3S: IC3 / 35T Brushed 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 70A Brushed Smart ESC, 2S-3S: IC3 / 35T Brushed 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 | SPMXSEMC12 |
| Spektrum Category | Cars & Trucks / Parts, Electronics & Accessories / Electronic Speed Controls |
| Connector Type | IC3, 3.5mm Bullet |
| Product Family | Spektrum ESC and speed-control range |
| Application | surface RC vehicles, crawlers, bashers and race setups that need dependable Spektrum control electronics |
| Compatibility Focus | Check compatibility with Spektrum Smart equipment and the exact model requirements before ordering. |
| Adjustable Timing | No |
| Auto Cutoff | Yes |
| BEC | Yes |
| BEC Voltage | 6V / 7.4V User Selectable |
| Brakes | Integrated with ESC |
| Forward | Yes |
| Input Voltage | 2-3 Cell Li-Po / Li-Fe; 5-9 Cell Ni-MH / Ni-Cd |
| Maximum Continuous Current | 70A |
| Motor Limit | 540 / 550 Size Brushed Motors |
| Product Height | 0.71" (18 mm) |
| Product Length | 1.41" (36 mm) |
| Product Weight | 1.76 oz (50 g) |
| Product Width | 1.18" (30 mm) |
| Programmable | Yes |
| Reverse | Yes |
| Technology | Smart |
| Amperage | 70A |
| BEC Continuous Current | 4A (Shared Between Receiver and Aux Light Outputs) |
| Low-Voltage Cutoff Programmable | Yes |
| Motor Type | Brushed |
| Water-Resistant | Yes |
| Product Application | Crawling, Surface |
| Number of Poles | 3 |
| Maximum Burst Current | 200A |
| Speed Control | Included |
| Turns | 35T |
Tags: Spektrum, SPMXSEMC12, Spektrum ESC and speed-control range, Spektrum Catalog, Spektrum Smart Technology, Spektrum ESCs, Spektrum Surface Electronics, RC-MODEL
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