Overview
The Etronix TX Controlled Aux 2A On/Off Switch Relay (ET0773) is an essential accessory for RC enthusiasts who want to add sophisticated auxiliary control capabilities to their models. Whether you're running an RC car UK setup, a brushless RC truck, or any custom RC project that requires reliable switched power management, this compact relay switch offers the precision control you need. Designed by Etronix, a trusted name in RC electronics and spares, this TX-controlled relay allows you to operate auxiliary systems through your radio transmitter, making it perfect for controlling lights, fans, winches, or other 2A-rated accessories on your RC vehicle.
This relay represents excellent value for RC hobbyists looking to expand the functionality of their models without requiring complex wiring or additional control modules. The 2A current rating makes it suitable for a wide range of auxiliary applications, from LED lighting systems to small motorised components. If you're building a high-end RC crawler, a scale model with working accessories, or any RC project that benefits from transmitter-controlled switching, this component is an invaluable addition to your setup.
Available at RC Model Shop, a trusted UK RC retailer and authorised dealer, the Etronix TX Controlled Aux 2A On/Off Switch Relay is backed by expert knowledge and genuine product guarantee. Whether you're a seasoned RC competitor, a weekend basher, or discovering the world of custom RC builds for the first time, our team is ready to help you integrate this relay into your project and provide ongoing support.
Key Features
- TX-Controlled Operation — This relay integrates directly with your RC transmitter's auxiliary channel, allowing wireless switching of connected components without needing to modify your receiver or radio system. This gives you real-time control over your auxiliary systems from your transmitter, just as easily as controlling your throttle and steering.
- 2A Continuous Current Rating — With a 2A maximum current capacity, this relay can safely handle a wide variety of auxiliary loads including LED lighting arrays, small fans, winches, and other motorised components. The 2A rating ensures reliable operation without thermal stress or component failure, giving you peace of mind during extended play sessions.
- On/Off Switching Function — The relay provides simple, reliable binary control—you activate your auxiliary system when needed and deactivate it just as easily through your transmitter. This straightforward switching mechanism makes it perfect for lighting, accessories, or any component that needs simple on/demand power management.
- Compact Design — The ET0773's small form factor makes it easy to integrate into tight spaces within your RC model, whether you're building a scale crawler, a competition RC buggy, or a custom project car. Its compact dimensions don't require extensive modifications to your chassis or body.
- Genuine Etronix Quality — As an authentic Etronix component, this relay meets the same quality standards and reliability expectations you've come to trust from this established manufacturer. Etronix spares and upgrades are recognised across the RC hobby as dependable replacements and performance upgrades.
- Easy Integration — The relay connects directly to your receiver's auxiliary channel and your desired load, requiring minimal wiring expertise. If you're comfortable with basic RC electronics and connector types, installation is straightforward and hassle-free.
Technical Performance
The Etronix TX Controlled Aux 2A On/Off Switch Relay represents solid engineering for RC auxiliary control applications. At its heart is a relay mechanism that responds to transmitter commands sent through your receiver's auxiliary output port, switching power to your connected accessories with reliability and precision. The 2A continuous current rating is carefully engineered to handle sustained loads without overheating, making this component suitable for extended RC sessions whether you're crawling rock formations, racing around a track, or running display models. The relay's design follows established RC electronics standards and is compatible with modern receiver systems that include auxiliary channel outputs—whether you're running Spektrum, Futaba, JR, or other standard RC radio protocols. The small physical footprint means you can mount this component almost anywhere within your RC model, from the chassis tray of a scale crawler to the interior of a monster truck body. For hobbyists building custom RC vehicles with working lights, motorised winches, spinning fans, or other creative additions, this relay provides the control interface you need without requiring expensive custom electronics or difficult programming. The straightforward on/off control mechanism means no complex setup is required—simply connect your transmitter's auxiliary channel, wire your load to the relay's output terminals, and you're ready to switch your accessories with a flick of your transmitter switch.
What's in the Box
- Etronix TX Controlled Aux 2A On/Off Switch Relay (ET0773)
What You Need to Complete
- RC receiver with auxiliary channel output
- RC transmitter (must support auxiliary channel control)
- Power source for your auxiliary component (typically drawn from your main battery or a separate receiver battery)
- Auxiliary load component (lights, fan, winch, motor, etc.) rated for 2A maximum
- Appropriate connectors and wiring to integrate the relay into your specific RC setup
Frequently Asked Questions
- Can I use this relay to control lights on my RC car in the UK? — Yes, absolutely. The 2A rating is ideal for LED light arrays commonly used on scale RC models and display vehicles. Simply wire your lights to the relay's output terminals and connect the relay's signal wire to your receiver's auxiliary channel. Your transmitter will then control the lights through the auxiliary switch or knob.
- What is the maximum current this relay can handle? — The Etronix TX Controlled Aux 2A On/Off Switch Relay is rated for a maximum continuous current of 2A. This is sufficient for most hobby RC auxiliary applications including lighting systems, small fans, and compact motorised components. Do not attempt to exceed this rating as it may cause the relay to overheat or fail.
- Is this suitable for beginners? — If you have basic knowledge of RC electronics, receiver connections, and simple wiring, you can install this relay successfully. However, this is not a plug-and-play component for complete beginners—it requires understanding of auxiliary channels, receiver outputs, and electrical integration. If you're new to RC electronics, we recommend consulting our expert team at RC Model Shop for guidance.
- What types of auxiliary systems can I control with this relay? — This relay works with any 2A-rated auxiliary component that requires simple on/off switching. Common applications include LED lighting packages, cooling fans, motorised winches for crawlers, rotating turrets, or any other accessory that operates on a binary control signal. You cannot use it for proportional control systems that require variable power levels.
- Do I need a special transmitter to use this relay? — Your transmitter must support auxiliary channel control, which most modern RC transmitters do. Whether you're using Spektrum, Futaba, JR, or another standard RC radio system, as long as your transmitter has an available auxiliary channel, this relay will work with your setup.
- How do I know if my receiver has an auxiliary output? — Modern RC receivers typically include multiple channels for different functions. Your receiver documentation will show which ports are available for auxiliary outputs. Standard receivers often have ports 5, 6, 7, or 8 designated for auxiliary use. Consult your specific receiver's manual to confirm.
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 TX CONTROLLED AUX 2A ON/OFF SWITCH RELAY ET0773 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: ET0773
- Product Type: TX Controlled Auxiliary Switch Relay
- Maximum Current Rating: 2A
- Control Method: Transmitter-controlled via receiver auxiliary channel
- Function: On/Off switching
- Status: Out of Stock (Expected: July 14th)
- Price: £3.79 (exc. VAT: £3.33)
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- 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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