Etronix 4.0mm Gold Connector Red and Black Banana Plugs ET0600

Overview

The Etronix 4.0mm Gold Connector Red & Black Banana Plugs (ET0600) are essential connectors designed for RC enthusiasts who demand reliable, colour-coded power connections across their entire RC setup. Whether you're building custom leads, performing repairs, or upgrading your existing RC car, boat, or aircraft, these professional-grade connectors provide the tidy, organised wiring that separates a well-maintained RC setup from a tangled mess of cables. The 4.0mm size is widely recognised and used throughout the RC hobby in the UK and beyond, making these connectors one of the most practical spares to keep in your toolbox.

Designed with polarity clearly marked through distinctive red and black colour coding, the Etronix 4.0mm Gold Connector takes the guesswork out of power wiring connections. This is particularly important when working with battery leads, ESC connections, motor connectors, and charging leads where reversed polarity can cause serious damage to your RC equipment. For RC car UK enthusiasts, RC boat builders, and RC aircraft pilots, having quality connectors with unambiguous colour coding is not a luxury—it's a necessity that protects your investment and ensures safe, reliable operation every single time you take your model out.

The gold plating on these connectors is engineered to provide superior conductivity and resistance to corrosion, ensuring that your power connections remain clean and efficient through numerous connect-disconnect cycles. This makes the Etronix 4.0mm Gold Connector ideal for hobbyists who regularly swap batteries, test different configurations, or maintain multiple RC models simultaneously. At just £1.50, these connectors represent outstanding value and should form part of every RC enthusiast's spare parts collection.

Key Features

• Gold-plated contacts — The gold plating provides superior electrical conductivity compared to standard brass connectors, ensuring minimal resistance and voltage drop during power delivery to your RC motor and electronics. This translates to more efficient power transfer and better overall performance from your RC car, boat, or aircraft.
• Colour-coded red and black — The distinctive red and black banana plug design makes polarity immediately obvious, preventing dangerous reverse-polarity connections that could damage your ESC, motor, or battery. This colour coding is a universal standard across RC hobbies and eliminates confusion during assembly and repairs.
• 4.0mm size standard — The 4.0mm connector size is widely used across RC vehicles and equipment, making these plugs compatible with countless RC cars, boats, and aircraft on the market. Whether you're working with battery leads, ESC inputs, motor connections, or charging leads, 4.0mm interfaces are the industry standard for most mid-range and serious RC applications.
• Suitable for battery, ESC, motor and charging leads — These versatile connectors work across multiple applications within your RC setup, allowing you to standardise your connections and build a coherent, professional wiring infrastructure. Whether you're connecting your LiPo battery to an ESC, linking an ESC to a motor, or setting up a charging lead, the 4.0mm Gold Connector handles all these roles with equal reliability.
• Straightforward installation — The banana plug design offers a simple push-fit interface that requires no soldering expertise or complex assembly. If you're new to RC hobbies or simply prefer quick, tool-free connections, these plugs provide immediate usability without the learning curve of crimped or soldered alternatives.

Technical Performance

The Etronix 4.0mm Gold Connector represents solid engineering focused on reliability and conductivity. The gold-plated brass construction ensures excellent electrical properties whilst resisting oxidation and corrosion over time, even in environments where RC models are regularly exposed to moisture or temperature fluctuations. The banana plug design creates a secure, positive connection that maintains contact pressure through repeated use, preventing the loose connections that can cause intermittent power loss or dangerous electrical arcing. The 4.0mm interface diameter is specifically engineered to match the connector sockets found on the majority of modern RC car ESCs, battery packs, motors, and chargers in the UK RC market. These connectors support the power requirements of typical RC applications, handling the current demands of brushless motors, standard LiPo batteries, and professional-grade ESC systems without degradation. The red and black colour coding isn't merely cosmetic—it follows international electrical standards that ensure your RC setup can be understood and maintained safely by yourself or any other RC enthusiast who works on your models.

What's in the Box

• One pair of Etronix 4.0mm Gold Connector banana plugs (one red, one black)

Frequently Asked Questions

• Are 4.0mm connectors compatible with my RC car, boat or aircraft? — The 4.0mm size is widely used across RC vehicles, particularly on battery leads, ESC connections, motor plugs, and charging interfaces. However, you should check your existing model and current plugs for size and connector type before purchasing, as some RC vehicles use alternative connector standards like 3.5mm, 5.5mm, or proprietary connectors. Measure your current connectors or consult your model's documentation to confirm compatibility.
• What is the benefit of gold-plated connectors over standard brass? — Gold plating significantly improves electrical conductivity and provides superior corrosion resistance compared to bare brass or standard metal finishes. This means your power connections maintain consistent resistance over many charge-discharge cycles, delivering stable voltage to your RC electronics and maximising the performance and lifespan of your equipment. Gold-plated connectors are the professional standard in RC hobbies.
• Can I use these connectors with LiPo batteries? — Yes, the Etronix 4.0mm Gold Connector is fully compatible with LiPo batteries and is commonly used on LiPo battery packs, chargers, and balance connectors in the 2S, 3S, 4S range. These connectors handle the power demands of LiPo systems and are safe to use with modern RC battery technology when installed with correct polarity.
• Why is colour coding important for RC connectors? — Colour coding eliminates the risk of reverse-polarity connections, which can cause catastrophic damage to your ESC, motor, or battery in seconds. The red banana plug should connect to positive terminals, and the black to negative terminals, following universal electrical safety standards. This simple visual distinction prevents costly mistakes and keeps your RC hobby safe.
• Are these suitable for beginners? — Absolutely. The Etronix 4.0mm Gold Connector is ideal for RC beginners because it requires no soldering, crimping, or specialised tools—simply push the banana plug onto the matching socket and you have a secure connection. The colour coding makes polarity obvious, and the straightforward design eliminates confusion. Experienced RC enthusiasts also use these connectors for custom leads and repairs because of their simplicity and reliability.
• What is the difference between 4.0mm and other connector sizes? — Connector size determines compatibility and current-handling capacity. The 4.0mm size is the industry standard for most mid-range and serious RC applications, offering a good balance between ease of use and reliable contact pressure. Smaller 3.5mm connectors are used on some entry-level RC models, whilst larger 5.5mm connectors appear on high-power applications. Always match your connectors to your existing equipment to ensure safe operation.

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 Etronix 4.0mm Gold Connector Red & Black ET0600 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.