SAVOX HV DIGITAL BRUSHLESS SERVO 28KG/0.095s@7.4V - PLUS SAV-SB2273SG+

Overview

The Savox SB2273SG+ High Voltage Digital Brushless Servo represents the pinnacle of servo technology for serious RC enthusiasts in the UK. This premium servo combines cutting-edge brushless motor technology with advanced digital processing to deliver exceptional performance across a wide range of demanding applications. Whether you're piloting a high-speed 1/8th scale buggy, commanding a 1/10th scale truck over challenging terrain, or controlling a giant scale aircraft, the SB2273SG+ delivers the precision, speed and power required for competitive racing and serious bashing alike.

The SB2273SG+ is engineered specifically for RC car UK enthusiasts, RC truck owners, and large-scale aircraft pilots who demand nothing but the best from their equipment. This servo excels in brushless RC vehicles of all types, from electric buggies and nitro trucks to giant scale helicopters and boats. The unique steel gear train combined with brushless motor technology makes this servo an ideal choice for anyone looking to upgrade their RC setup or build a high-performance machine from scratch.

What sets the SB2273SG+ apart from standard servos is its combination of extreme speed, impressive torque delivery, and the innovative Soft Start Mode and Sanwa SSR compatibility featured in the Plus variant. These enhancements demonstrate Savox's commitment to delivering not just a servo, but a complete solution for modern RC enthusiasts who expect their equipment to perform reliably under extreme conditions.

Key Features

• Brushless Motor Technology — Unlike traditional brushed motors, the brushless design eliminates friction and wear from brush contact, resulting in significantly smoother operation, incredible efficiency, and remarkably low power consumption. This means your servo will run cooler, last longer, and provide more consistent performance throughout extended driving sessions or flying time.
• High Voltage (HV) Operation Capability — The SB2273SG+ is engineered to handle high voltage power supplies, enabling operation at 7.4V where it delivers its maximum rated torque of 28kg and exceptional speed of just 0.095 seconds per 60 degrees. This HV capability provides substantially more power and responsiveness compared to standard 6V servos, making it essential for competitive RC applications where every millisecond counts.
• Unique Steel Gear Train — The precision-engineered steel gear construction ensures durability and reliability under the extreme stresses of competitive racing and heavy-duty off-road use. Steel gears transmit power more efficiently than plastic alternatives and resist stripping even when the servo is pushed to its limits, making this servo suitable for both electric and nitro-powered RC vehicles.
• Super High 12-Bit (4096) Resolution — This advanced digital servo processing delivers incredibly precise servo movements with 4096 discrete positions available, rather than the lower resolution found in basic servos. This exceptional precision translates to smoother, more controlled steering inputs and more accurate throttle response, giving drivers a significant competitive advantage.
• Compact Lightweight Design — Weighing just 69.0 grams, the SB2273SG+ is designed to minimise vehicle weight whilst maintaining exceptional structural integrity. For RC car UK applications, especially in 1/8th and 1/10th scale vehicles, this lightweight construction directly improves acceleration, handling responsiveness, and battery runtime.
• Soft Start Mode (Plus Variant) — The SB2273SG+ features Soft Start Mode, a technology innovation that provides gentler servo engagement when powered on. This protects mechanical components from sudden shocks and extends overall servo lifespan, particularly beneficial in high-stress applications like buggy racing and off-road bashing.
• Sanwa SSR Compatibility — The Plus variant is fully compatible with Sanwa SSR radio systems, ensuring seamless integration with professional-grade RC radio equipment and allowing users to take advantage of advanced telemetry and control features without compatibility concerns.
• Environmentally Friendly Design — Savox servos are engineered with sustainability in mind, from the materials used in construction through to the manufacturing process. This commitment to environmental responsibility means you're supporting greener RC hobby practices without compromising on performance.
• Two Ball Bearings — The servo output shaft is supported by two precision ball bearings, reducing friction and play whilst delivering smooth, reliable rotation even under constant use. This bearing arrangement ensures the servo maintains its performance characteristics throughout its operational life.
• 25-Tooth Output Gear Spline — The standard 25-tooth spline is widely compatible with aftermarket servo horns and control arms available from RC suppliers across the UK, ensuring you have numerous options for mounting and adjusting servo throw to suit your specific vehicle setup.

Technical Performance

The Savox SB2273SG+ represents a remarkable achievement in servo engineering, delivering performance specifications that compete with servos costing significantly more. At 7.4V using a high voltage LiPo battery, this digital brushless servo produces an exceptional 28 kilograms of torque (388.8 ounce-inches), with an astounding speed of 0.095 seconds per 60-degree rotation. These specifications place it firmly in the premium category for high-performance brushless RC vehicles. The servo maintains impressive performance even at 6V, delivering 23 kilograms of torque with a speed rating of 0.12 seconds per 60 degrees, making it versatile enough for multiple power supply configurations. The brushless motor technology ensures smooth, efficient operation with minimal electrical noise and interference, critical factors for vehicles running advanced radio systems. Construction features a unique steel gear train that resists the stripping and wear common in plastic-geared servos, whilst the lightweight aluminium case housing keeps overall mass to just 69.0 grams. The servo's dimensions of 40.3 x 20.2 x 38.7 millimetres make it compact enough for installation in modern 1/8th scale buggies and 1/10th scale trucks without taking up excessive space or adding unnecessary weight. Operating current under no-load conditions measures just 180mA at 6.0V and 220mA at 7.4V, indicating efficient power consumption even during active use. The stall current of 6000mA at 6.0V and 7400mA at 7.4V demonstrates the servo's capability to produce significant force under load. The servo operates across a temperature range of -10°C to +50°C, covering conditions from early morning winter racing to hot summer competition days. With a 333 Hz refresh rate and full operating travel of 100 degrees (1000 to 2000 microseconds), plus maximum travel capacity of approximately 130 degrees (900 to 2100 microseconds), this servo provides the versatility needed for both steering and throttle applications in competitive RC environments.

What's in the Box

• Savox SB2273SG+ High Voltage Digital Brushless Servo
• Servo lead with standard connector (300mm ±5mm length)

What You Need to Complete

• Radio receiver compatible with standard servo connectors (Sanwa SSR recommended for Plus model compatibility)
• High voltage LiPo battery (2S recommended for optimal performance at 7.4V)
• Battery connector and charging system appropriate for your LiPo battery
• Servo horn or control arm (25-tooth spline aftermarket horns available separately)
• Servo mounting bracket appropriate for your RC vehicle (normally included with vehicle kit)
• RC vehicle frame, motor, ESC and other drivetrain components

Frequently Asked Questions

• Is the Savox SB2273SG+ suitable for 1/8 scale RC buggies and off-road trucks? — Yes, absolutely. The manufacturer specifically identifies this servo as ideal for 1/8 buggies, and the combination of 28kg torque at 7.4V, 0.095 second speed, and brushless motor technology makes it one of the best choices for high-performance 1/8 scale off-road racing and bashing. The SB2273SG+ is equally suitable for competitive 1/10 scale trucks and buggies.
• What battery voltage does this servo require? — The SB2273SG+ operates from 6.0V to 7.4V. For optimal performance and maximum torque output of 28kg at 0.095 second speed, a 2S LiPo battery providing 7.4V is recommended. However, the servo will also function with 6.0V systems, delivering 23kg torque at 0.12 second speed.
• How does the brushless motor compare to traditional brushed servo motors? — Brushless motors in servos eliminate the friction and wear associated with brushes sliding across the commutator. This results in smoother, more efficient operation with lower electrical noise, less heat generation, and significantly extended motor life. For RC car UK enthusiasts running advanced radio systems, the reduced electrical interference from brushless operation is particularly valuable.
• What makes the Plus variant different from the standard SB2273SG? — The SB2273SG+ includes two significant enhancements: Soft Start Mode technology that provides gentler servo engagement and protects mechanical components, and full compatibility with Sanwa SSR professional radio systems, ensuring seamless integration with high-end RC control equipment.
• Is this servo waterproof for use in RC boats and wet conditions? — The specifications provided do not indicate a specific waterproof rating for this servo. Whilst the servo can be used in boats and amphibious vehicles, users operating in wet environments should consider appropriate protective measures and ensure the servo connector is kept dry.
• What is the difference between the SB2273SG+ and other high-performance servos? — The SB2273SG+ combines several advantages: unique steel gear train construction, brushless motor technology, exceptional 12-bit digital resolution with 4096 positions, compact lightweight design at just 69 grams, and the innovative Soft Start Mode. These features collectively provide superior performance, reliability, and precision compared to many competing servos at similar price points.
• Can I use this servo for steering and throttle control? — Yes, the SB2273SG+ is suitable for both applications. Its high torque output and precise speed control make it excellent for responsive steering in competitive driving, whilst the servo's smooth brushless motor and reliable response characteristics also make it appropriate for throttle control applications in electric RC vehicles.
• How long is the servo lead? — The servo lead measures 300 millimetres plus or minus 5 millimetres (approximately 12 inches), providing adequate length for most standard RC vehicle installations without requiring servo extensions.
• What is the servo's output gear specification? — The servo uses a standard 25-tooth spline output gear, which is compatible with the vast majority of aftermarket servo horns and control arms available from RC suppliers across the UK, providing numerous mounting and adjustment options.
• Does this servo come with servo horns? — No, the servo is supplied without horns or arms. You will need to purchase compatible 25-tooth spline servo horns or control arms separately, which are widely available and inexpensive.

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 SAVOX HV DIGITAL BRUSHLESS SERVO 28KG/0.095s@7.4V - PLUS SAV-SB2273SG+ 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.