Overview
The Etronix JR 3 Lead Switch Harness ET0778 is an essential component for RC enthusiasts who need a reliable, straightforward on/off solution for their electric-powered models. Whether you're running an RC car, plane or boat, this switch harness provides a simple yet effective way to control power delivery to your receiver and servos. Built by Etronix, a recognised name in RC electronics and accessories, this harness is designed for modellers who demand dependable performance without unnecessary complexity. This is particularly useful if you're replacing a worn-out receiver switch on an existing model or adding a tidy on/off solution to an electric RC rig where you want to minimise voltage drop and maintain clean installation aesthetics.
Switch selection is a critical part of any RC setup, and the JR connector compatibility makes this harness ideal for a wide range of receivers and equipment. The 3-lead configuration provides straightforward installation for users familiar with basic RC electronics, making it a practical choice for both experienced hobbyists and those looking to upgrade their existing setups. At just £3.99, the Etronix JR 3 Lead Switch Harness represents excellent value for money and offers the kind of practical reliability that serious RC car UK enthusiasts, plane pilots and boat operators have come to expect from quality budget components.
RC Model Shop stocks a comprehensive range of switches from leading manufacturers including Spektrum, HPI, Futaba and KO Propo, but the Etronix JR range stands out for delivering genuine quality at affordable prices. Whether you need this switch for a high-vibration nitro model conversion, a waterproof boat installation or simply as a spare for your ready to run RC vehicle, the ET0778 is a sensible investment that will serve you reliably for years of RC enjoyment.
Key Features
- JR Connector Type — This harness features JR-standard connectors, which are widely used across the RC hobby and compatible with the vast majority of receivers on the market, making it a versatile choice for your collection of RC cars, planes and boats regardless of brand.
- 3-Lead Configuration — The three-lead design simplifies installation and provides a clean, professional-looking power solution that integrates neatly into your model without unnecessary bulk or cable management headaches.
- Straightforward On/Off Control — Unlike complex electronic switches, this mechanical harness offers direct, reliable power switching with minimal voltage drop, ensuring your receiver and servos receive clean, uninterrupted power delivery for optimal performance.
- Budget-Friendly Solution — Priced at just £3.99, this switch harness delivers exceptional value for money, making it an economical choice for hobbyists looking to upgrade or replace tired receiver switches without breaking the bank.
- Etronix Quality and Reliability — Built by Etronix, a trusted manufacturer of RC electronics and accessories, this harness benefits from proven engineering and quality control standards that ensure dependable operation across thousands of RC models worldwide.
- Universal RC Application — Suitable for use in RC cars, planes, boats and other electric-powered models, this harness provides a flexible solution for any hobbyist with multiple vehicles in their collection.
Technical Performance
The Etronix JR 3 Lead Switch Harness ET0778 is engineered as a mechanical switch solution, meaning it operates without complex electronics or power-consuming circuits that could introduce unwanted voltage drop to your receiver and servos. The 3-lead configuration provides straightforward connectivity that integrates seamlessly with standard JR-equipped receivers. The harness is designed with attention to reliability and durability, ensuring that your power switching remains consistent and trouble-free across extended periods of use. This is particularly important for RC hobbyists who run high-performance electric setups where even small voltage losses can affect servo response and receiver sensitivity. The mechanical design also means there are no batteries to fail within the switch itself, no circuit boards to damage, and no complex troubleshooting required if performance issues arise. The JR connector standard ensures compatibility with the broadest possible range of receivers and electronic components, making this an intelligent choice for anyone building or maintaining an RC vehicle collection. Whether you're working on a brushless electric RC car, an electric-powered RC plane or a battery-powered RC boat, this harness provides reliable power distribution with minimal fuss.
What's in the Box
- Etronix JR 3 Lead Switch Harness
Frequently Asked Questions
- Is the Etronix JR 3 Lead Switch Harness suitable for beginners? — Yes, absolutely. This switch harness is one of the simplest components you can install in an RC model. If you're familiar with basic RC setup and comfortable handling JR connectors, installation is straightforward and requires no technical expertise. It's an ideal upgrade for beginners who want to replace a broken receiver switch or add a proper on/off control to their model.
- What is the difference between the JR 3 Lead and the Futaba 3 Lead Switch Harness? — The key difference is the connector type. The Etronix JR 3 Lead Switch Harness (ET0778) features JR-standard connectors, whilst the Futaba version (ET0779) uses Futaba connectors. The functionality is essentially identical, so your choice depends entirely on which connector standard your receiver uses. Most modern receivers support both standards, so check your specific model before ordering.
- What voltage can this switch harness handle? — The source materials do not specify voltage ratings, so we recommend contacting our expert team at RC Model Shop to confirm suitability for your specific battery setup. With most electric RC cars, planes and boats running 2S to 4S LiPo batteries, the harness should be compatible with standard applications, but it's always best to verify.
- Can I use this switch harness in a waterproof RC boat? — The Etronix JR 3 Lead Switch Harness is not specifically marketed as a waterproof component. If you're building a waterproof or water-resistant RC boat, we recommend choosing one of Etronix's sealed or rubber-booted switch options instead, or consulting with our team about the best solution for wet environments.
- Is this a mechanical or electronic switch? — This is a mechanical switch harness, which means it operates without complex electronics. This design provides reliability, minimal voltage drop, and simplicity — there are no batteries within the switch itself and no circuits to fail, making it an excellent choice for straightforward power control.
- What makes this better than a budget switch? — Whilst Etronix does manufacture budget switches at even lower price points, the JR 3 Lead harness represents a balance between affordability and proven quality. It's an ideal middle ground for hobbyists who want genuine Etronix reliability without paying premium prices for advanced electronic features they may not need.
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 JR 3 LEAD SWITCH HARNESS ET0778 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.
- Brand: Etronix
- Model Number: ET0778
- Product Type: JR 3 Lead Switch Harness
- Connector Type: JR standard connectors
- Lead Configuration: 3 lead
- Switch Type: Mechanical switch harness
- Compatible Applications: RC cars, RC planes, RC boats, electric-powered RC models
- Price: £3.99 (excluding VAT)
- Alternative Connector Version: ET0779 (Futaba connector version also available)
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.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
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- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
