- Brand: ARRMA
- Product Type: Motor Heatsink
- Model Number: Z-ARA390296
- EAN: 5052127035262
- Compatible Motor Diameter: 46mm
- Material: High-quality lightweight aluminium
- Finish: Black anodised with etched ARRMA logo
- Design: Multi-fin design for efficient heat transfer
- Cooling Fan Mounting: Flat area accommodates 50mm cooling fans
- Included Accessories: Motor Heatsink Clip
- Compatible Vehicles: C-ARA7617V2T2 (Felony 6S BLX Orange), C-ARA7617V2T1 (Felony 6S BLX Black), C-ARA7615V2T2 (Infraction 6S BLX Silver), C-ARA7615V2T1 (Infraction 6S BLX Blue), C-ARA7116V2 (1/7 Limitless V2 Speed Bash Roller), C-ARA5810V2T1 (1/5 Outcast 4X4 8S BLX EXB Brushless Stunt Truck RTR Black), C-ARA7707V6T1 (1/7 TALION 6S EXB 4X4 RTR Speed Truck Black), C-ARA8406 (1/8 TLR Tuned TYPHON 6S 4WD BLX Buggy RTR Red/Blue)
- Cooling Type: Motor Cooling
- Package Contents: 1 x Motor Heatsink 4685, 1 x Motor Heatsink Clip
Overview
Keep your brushless RC motor running at peak performance with the ARRMA Motor Heatsink 4685, a precision-engineered cooling solution designed specifically for high-powered RC cars and trucks. Whether you're running a competitive brushless setup or enjoying casual weekend bashing with your RC car UK, motor temperatures can quickly escalate during intense driving sessions. This aluminium heatsink is engineered to dissipate heat efficiently, ensuring your motor maintains optimal performance and longevity even when the action heats up on the track or across rough terrain.
The Motor Heatsink 4685 is compatible with a wide range of ARRMA brushless RC vehicles, including the Felony 6S BLX, Infraction 6S BLX, Limitless V2, Outcast 4X4 8S BLX, TALION 6S, and TYPHON 6S models. This makes it an essential upgrade for RC enthusiasts who want to maximise their motor's lifespan and maintain consistent performance during extended running sessions. Whether you're a seasoned competitor pushing your ready to run RC truck to its limits or a hobbyist enjoying recreational drives, effective motor cooling is crucial for maintaining reliability and avoiding thermal throttling.
Built to the same exacting standards as all genuine ARRMA components, this heatsink offers the perfect combination of lightweight construction and superior heat dissipation, making it an investment in your RC vehicle's performance and durability. The included mounting clip and compatibility with optional 50mm cooling fans mean you can customise your cooling setup to match your driving style and conditions.
Key Features
- Precision Manufactured for Perfect Fit — Each heatsink is precision engineered to fit 46mm diameter motors with absolute accuracy, ensuring secure mounting and optimal contact with the motor body for maximum heat transfer efficiency.
- High-Quality Lightweight Aluminium Construction — The heatsink is crafted from premium-grade light-weight aluminium that provides excellent thermal conductivity whilst keeping overall vehicle weight to a minimum, which is essential for maintaining agility and performance in competitive RC racing.
- Multi-Fin Design for Efficient Heat Transfer — The carefully designed multi-fin structure dramatically increases the surface area available for heat dissipation, allowing air to flow across multiple cooling fins and carry away heat more effectively than a simple solid design.
- Black Anodised Finish with Etched ARRMA Logo — Not only does the black anodised finish provide exceptional durability and corrosion resistance, but the etched ARRMA branding also gives your RC vehicle a professional, finished appearance that reflects the quality of your setup.
- Flat Mounting Area for 50mm Cooling Fans — The heatsink features a dedicated flat area that accepts standard 50mm cooling fans, allowing you to upgrade your cooling capacity if you're running extended sessions or operating in hot conditions where additional airflow makes a significant difference.
- Included Heatsink Clip for Secure Mounting — The package includes a purpose-designed mounting clip that ensures the heatsink stays firmly attached to your motor, eliminating any risk of vibration or movement during aggressive driving that could compromise heat transfer.
Technical Performance
The ARRMA Motor Heatsink 4685 represents the pinnacle of motor cooling design for brushless RC vehicles, specifically engineered for 46mm diameter brushless motors commonly found in high-performance ARRMA models. The aluminium construction provides exceptional thermal conductivity, with a multi-fin geometry that maximises surface area exposure to ambient air, enabling rapid heat dissipation even during sustained high-power driving. The black anodised finish not only enhances durability against the elements and provides corrosion resistance for outdoor RC enthusiasts, but also complements the professional appearance of modern brushless RC cars and trucks. The lightweight nature of the heatsink ensures that adding cooling capacity doesn't negatively impact your vehicle's acceleration or handling characteristics — a critical consideration when every gram matters in competitive RC racing. Compatible with ARRMA models including the Felony 6S BLX (both orange and black variants), Infraction 6S BLX (silver and blue versions), 1/7 Limitless V2 Speed Bash Roller, 1/5 Outcast 4X4 8S BLX EXB, 1/7 TALION 6S EXB, and 1/8 TLR Tuned TYPHON 6S models, this heatsink ensures reliable cooling across the full ARRMA brushless lineup. The flat mounting platform accommodates optional 50mm cooling fans, providing upgrade flexibility for users operating in high-temperature environments or during extended racing sessions where passive cooling alone may prove insufficient.
What's in the Box
- 1 x ARRMA Motor Heatsink 4685
- 1 x Motor Heatsink Clip
Frequently Asked Questions
- Will the Motor Heatsink 4685 fit my ARRMA brushless RC vehicle? — Yes, the heatsink is specifically designed for 46mm diameter motors and is compatible with a comprehensive range of ARRMA brushless models including the Felony 6S BLX, Infraction 6S BLX, Limitless V2, Outcast 4X4 8S BLX, TALION 6S, and TYPHON 6S. Check your vehicle's motor specifications to confirm compatibility before purchasing.
- Do I need a cooling fan with this heatsink, or does it work on its own? — The Motor Heatsink 4685 provides effective passive cooling through its multi-fin aluminium design and will keep temperatures in check during normal driving conditions. However, the flat mounting area allows you to add an optional 50mm cooling fan for enhanced cooling capacity during intense or prolonged running sessions, particularly in hot weather or competitive racing environments.
- What makes aluminium heatsinks better than plastic alternatives for RC motors? — Aluminium offers dramatically superior thermal conductivity compared to plastic, meaning heat transfers from your motor to the heatsink and then dissipates into the air far more efficiently. This prevents thermal throttling and extends motor lifespan by maintaining more consistent temperatures during extended driving sessions, which is especially important for brushless RC cars running at high power outputs.
- Is this suitable for beginners upgrading their RC car UK setup? — Absolutely. The Motor Heatsink 4685 is an excellent upgrade for any RC enthusiast wanting to extend motor life and improve performance reliability. Installation is straightforward using the included clip, and it's compatible with popular ready to run RC models, making it perfect for beginners who want to protect their investment without complex modifications.
- Can I use this heatsink with aftermarket cooling fans from other manufacturers? — Yes, the flat mounting area is designed for standard 50mm cooling fans, which are widely available from RC retailers. However, we recommend confirming fan compatibility with your specific setup before purchasing to ensure proper fit and secure mounting.
- How much temperature reduction can I expect from using this heatsink? — Temperature reduction depends on several factors including ambient air temperature, driving intensity, and whether you've added an optional cooling fan. Generally, a quality aluminium heatsink like the 4685 can reduce motor temperatures by 10-20 degrees Celsius compared to running without one, with greater reductions possible when paired with active cooling.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the ARRMA Motor Heatsink 4685 Z-ARA390296 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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