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Item #:
162848819
Spektrum Accessories FIRMA 85A BL Smart ESC/3300Kv Sensorless Mot Combo SPMXSEMC01 Car Speed Controls & Accessories
90% of respondents would recommend this to a friend
Item #:
162848819
XPF 20117
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
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Imported from USA store
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Only 12 items left in stock.
Order now and get it around Wednesday, October 07
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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.
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What Stands Out
Powerful Performance
The 3300Kv brushless motor delivers exceptional speed and torque, ensuring high-performance driving with quick acceleration and responsive handling for all RC enthusiasts.
Smart ESC Technology
Integrated Smart ESC technology provides real-time telemetry and auto-configuration, enhancing the user experience by simplifying setup and maximizing compatibility with various models.
Durable Design
Constructed for durability, this ESC and motor combo is built to withstand the rigors of RC racing, offering reliability and longevity, making it a valuable investment for hobbyists.
Product Details
- SmartLink USB Updating and Programmer applicationMulti-point protection: Over-current protectionAutomatic LiPo low-voltage cutoffThermal protectionFailsafe protectionDeveloped and designed by Spektrum engineers, in partnership with the industry's leading ESC manufacturerCompact for easy installation in most applicationsReady to install no soldering requiredRugged plastic case with mounting tabsAluminum heat sink for high efficiencyCooling fanAdjustable high-power BECFirmware updatable through the Smart ESC Programming BoxHigh heat-resistant IC connectors, backwards compatible with EC connectorsLimited 1-year warrantyProduct OVERVIEW: Like every component in the Spektrum Smart ecosystem, Firma Smart ESCs combine plug-and-play simplicity with the ability to communicate with other Smart electronics together, creating the best-performing RC system for your vehicle imaginable. 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.
| Brand | Spektrum |
| Dimensions | 6.75 x 5.25 x 2.25 in (17.1 x 13.3 x 5.7 cm) |
| Weight | 1.11 oz (31.47 grams) |
| Material | Plastic and Metal |
| Model | 9421X |
| Color | Black |
| Count | 1 |
| Minimum recommended age | 14 years |
Who Should Buy?
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Competitive Racers
Ideal for racers seeking high-speed performance and precision control in competitive settings with advanced features.
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Hobbyists
Perfect for RC enthusiasts wanting to upgrade their setups for improved responsiveness and power efficiency.
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Versatile Applications
Designed for various RC vehicles, making it suitable for those who enjoy customizing different models.
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Beginner Users
May be too advanced for beginners who need simpler, more user-friendly options for ease of setup and use.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
Is soldering required for installation?
Answer: No, the setup is ready to install with no soldering required. -
Question:
Can I upgrade the firmware of the ESC?
Answer: Yes, the firmware is updatable through the Smart ESC Programming Box. -
Question:
What kind of protection features does the ESC have?
Answer: It includes over-current protection, low-voltage cutoff, thermal protection, and failsafe protection.
Spektrum Toys for Adults Editorial Review
The Spektrum Accessories FIRMA 85A BL Smart ESC/3300Kv Sensorless Mot Combo SPMXSEMC01 Car Speed Controls & Accessories is an essential upgrade for RC enthusiasts. With a compact dimension of 6.75 x 5.25 x 2.25 inches, it fits well within various car models while keeping the weight at just 1.11 ounces, ensuring it won't add unnecessary bulk. This model boasts a durable construction from plastic and metal, ensuring longevity during rigorous racing sessions. Ideal for users aged 14 and above, this combo offers performance enhancements that can elevate your driving experience. This ESC and motor combo is designed to provide smooth acceleration and precise throttle response, making every run enjoyable.
Customer Reviews & Ratings
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Pros
- Compact design fits various RC models
- Lightweight for optimal performance
- Durable plastic and metal construction
- Suitable for ages 14 and up
- Enhances acceleration and throttle response
Cons
- Installation may require some technical expertise
Platform Trust & Buyer Confidence
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Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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Anke
Verified buyer
“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”
10 September 2026 · via Trustpilot
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Hazel
Verified buyer
“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”
10 September 2026 · via Trustpilot
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Opaleye
Verified buyer
“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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Adele
Verified buyer
“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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XPF 20117
Order now and get it around Wednesday, October 07
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 12 items left in stock.
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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Fastest cross-border delivery
Features & Benefits
- Plug-and-play simplicity for easy installation.
- Real-time telemetry data including RPM, temperature, and battery status.
- Multi-point protection features for increased reliability.
- Firmware updatable for lasting performance.
- Robust design with a cooling fan and aluminum heat sink.
- 1-year limited warranty for assurance.
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