- Model Number: P-SPMSA346
- Servo Type: Digital
- Servo Size: Sub-Micro
- Weight: 8 grams
- Shaft Diameter: 4.6mm
- Operating Voltage: 4.8-6.0V
- Application: Aircraft
- Brand: Spektrum
Overview
The Spektrum A346 Sub-Micro Digital 8g Aircraft Servo is a lightweight, precision servo designed specifically for small-scale RC aircraft projects. This compact servo delivers reliable performance in a package that weighs just 8 grams, making it an ideal choice for enthusiasts building ultra-lightweight RC planes, flying wings, and other delicate aircraft platforms. Whether you're a seasoned RC aircraft builder in the UK or someone just discovering the world of RC flight, the A346 offers the digital accuracy and durability you need to control your aircraft with confidence. Its sub-micro dimensions make it perfect for applications where space and weight are critical considerations, and its digital construction ensures consistent, responsive control throughout your flight sessions.
The A346 represents Spektrum's commitment to delivering quality servo solutions across their extensive product range. As part of the renowned Spektrum brand portfolio available from RC Model Shop, this servo integrates seamlessly into existing Spektrum-based RC systems whilst offering outstanding value for money. Small RC aircraft demand precision and reliability, and this servo delivers both in spades. From foam-built trainers to balsa competition models, the A346 has earned its place as a trusted choice among RC aircraft enthusiasts across the UK and beyond.
Key Features
- Sub-Micro Form Factor — At just 8 grams, this servo is engineered to minimise weight whilst maintaining structural integrity, crucial for aircraft where every gram matters and payload capacity directly affects flight performance and handling characteristics.
- Digital Technology — The digital servo design provides enhanced precision and response compared to analogue alternatives, delivering smoother control inputs and more accurate positioning for critical flight control surfaces like elevators, ailerons, and rudders.
- Operating Voltage Range 4.8-6.0V — Compatible with standard RC battery configurations commonly used in small aircraft systems, this voltage range ensures flexibility in your power setup and works with both 4.8V four-cell and 6.0V five-cell battery packs.
- Aircraft-Optimised Design — Purpose-built for aircraft applications rather than general RC use, the A346 incorporates design elements that prioritise the specific control requirements of flight, including response characteristics tuned for smooth, predictable servo movement during manoeuvres.
- 4.6mm Shaft Diameter — The standard 4.6mm shaft size ensures broad compatibility with servo horns and linkage systems commonly found in small aircraft kits and custom builds, simplifying installation and allowing you to source replacement horns easily.
Technical Performance
The Spektrum A346 represents excellent engineering within the sub-micro servo category, delivering the performance characteristics demanded by RC aircraft builders and pilots. With a weight of just 8 grams and operating across the standard 4.8-6.0V voltage range, this digital servo provides responsive, accurate control without adding unnecessary mass to your airframe. The digital control circuitry ensures precise pulse width modulation (PWM) interpretation, translating your transmitter inputs into smooth, repeatable servo movements essential for stable flight. The 4.6mm shaft diameter provides excellent compatibility with standard servo horn assemblies and linkage hardware found in aircraft construction, whilst the digital technology delivers superior resolution compared to analogue servos, translating to finer control adjustments and more nuanced response to stick inputs. This servo's compact dimensions make it suitable for tight fuselage spaces, engine bays, and control surface installations where traditional standard-sized servos simply won't fit. The construction quality reflects Spektrum's reputation for reliability, with internal components engineered to withstand the vibration, temperature variations, and humidity exposure typical of outdoor RC flying. Whether you're building a high-wing trainer, an aerobatic pattern model, or a wing-mounted flying wing, the A346 provides the precision control foundation your aircraft deserves.
What's in the Box
- Spektrum A346 Sub-Micro Digital Servo (8g)
Frequently Asked Questions
- Is the Spektrum A346 suitable for beginner RC aircraft builders? — Yes, absolutely. The A346's compact size, standard shaft diameter, and straightforward digital control make it ideal for beginners building their first small-scale RC aircraft. Its lightweight design is particularly helpful for foam or lightweight balsa airframes where weight control is important for achieving proper balance and flight characteristics.
- What battery voltage does the A346 require? — The A346 operates across a 4.8-6.0V voltage range, meaning it's compatible with four-cell (4.8V) and five-cell (6.0V) NiCd or NiMH battery packs commonly used in RC aircraft systems, as well as single-cell LiPo batteries (3.7V nominal) if stepped up to the required voltage through appropriate power regulation.
- How does the A346 compare to similar sub-micro servos? — The A346 distinguishes itself through its digital control technology, which provides superior precision and response compared to analogue sub-micro alternatives. The 8-gram weight makes it lighter than many competing sub-micro servos whilst maintaining robust construction, and the 4.6mm shaft diameter ensures broad compatibility across aircraft kits and custom builds.
- What types of aircraft are best suited to the A346? — The A346 excels in lightweight aircraft applications including foam trainers, small balsa models, flying wings, parkflyers, and other sub-250g aircraft designs where weight is critical. Its compact dimensions make it perfect for fuselage-mounted, wing-mounted, or boom-mounted servo installations typical of small aircraft construction.
- Is the A346 water-resistant or weatherproof? — The specifications provided do not indicate water-resistant or weatherproof characteristics. It is recommended to protect this servo from moisture and direct water exposure during use and storage, particularly in wet weather flying conditions.
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 SPM Servo: A346 Sub-Micro Digital 8g Aircraft P-SPMSA346 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.
