Futaba R304SB 4-Channel (PWM) Surface Receiver with S.BUS for Telemetry T-FHSS FUT05102588-3

Overview

The Futaba R304SB is a compact 4-channel receiver engineered for RC car enthusiasts in the UK who demand reliable, space-efficient radio control solutions. This advanced receiver utilises T-FHSS telemetry technology, Futaba's proven frequency-hopping spread spectrum system with integrated telemetry capabilities, making it an excellent choice for serious RC hobbyists building competitive surface vehicles or compact off-road models. Whether you're setting up a high-voltage RC buggy, truggy, or stadium truck, the R304SB delivers the performance and monitoring capabilities that UK RC car builders have come to expect from Futaba's renowned engineering heritage.

At just 6.6 grams and measuring a mere 35.1 × 23.3 × 8.5 millimetres, the R304SB is purpose-built for space-conscious installations where every gram and millimetre counts. This makes it exceptionally well-suited for compact RC car platforms where weight distribution is critical to performance. The receiver's combination of compact form factor, advanced telemetry reporting, and S.Bus2 connectivity represents a significant step forward for RC car enthusiasts who want real-time feedback on their vehicle's systems during competitive driving or casual bashing sessions.

The R304SB stands out among RC receivers available in the UK market because it bridges the gap between simplicity and advanced functionality. Whilst maintaining straightforward 4-channel PWM command output for traditional servo control, it simultaneously offers S.Bus2 connectivity for expanded telemetry monitoring and sensor integration. This flexibility means you can start with basic operation and expand your vehicle's monitoring capabilities later without replacing the receiver—a genuinely thoughtful design feature that grows with your RC hobby investment.

Key Features

• T-FHSS Telemetry System — The receiver continuously monitors its own operating voltage and transmits this critical information back to your T-FHSS transmitter in real time, allowing you to track power levels during operation and receive warnings if voltage drops below safe thresholds. This telemetry feedback is essential for preventing unexpected power loss during races or driving sessions and helps protect your expensive servo equipment from under-voltage damage.
• 4-Channel PWM Output — Four independent pulse-width modulation channels provide straightforward servo control for steering, throttle, and two auxiliary functions, making the receiver compatible with standard RC car servos and electronic speed controllers used throughout the UK RC car community. PWM remains the industry standard for reliable, interference-resistant servo communication and works with virtually every brushless or brushed ESC available.
• S.Bus2 Port for Telemetry Expansion — A dedicated S.Bus2 connection allows you to attach additional Futaba telemetry sensors for monitoring vehicle parameters beyond receiver voltage, such as motor temperature, battery cell voltages, or GPS data. This expandability means a single receiver can grow with your requirements, enabling sophisticated data logging and real-time performance analysis for competitive RC car racing.
• Ultra-Compact Dimensions — Measuring just 35.1 × 23.3 × 8.5 millimetres, the R304SB fits into tight spaces within RC car chassis that would reject larger receivers, making it ideal for compact buggies, truggies, and competitive touring cars where internal space is at a premium. The minimal footprint also reduces vehicle weight and improves handling characteristics.
• Lightweight Construction — At 6.6 grams, the R304SB is among the lightest 4-channel receivers available, contributing minimal unsprung weight to your RC car and leaving precious weight budget for other performance-critical components. Every gram saved in receiver weight translates to improved acceleration, handling, and battery run time.
• Extended Voltage Operating Range — Operating across 4.8V to 7.4V DC, the R304SB accommodates both standard 1S LiPo cells and 2S LiPo battery packs, providing flexibility in battery selection for different RC car platforms. This wide voltage tolerance means the receiver continues functioning reliably even as battery voltage gradually drops during a driving session, protecting your vehicle from brown-out conditions.
• 2.4GHz Frequency Band — The receiver operates on the internationally recognised 2.4GHz ISM band, eliminating the need for frequency crystals and allowing multiple RC cars to operate simultaneously at the same location without interference—a crucial feature for UK RC clubs and racing events where many vehicles operate in close proximity.

Technical Performance

The Futaba R304SB represents the pinnacle of compact receiver engineering, combining professional-grade reliability with space-saving design that appeals to dedicated RC car builders across the United Kingdom. The receiver's T-FHSS telemetry system continuously samples receiver voltage and transmits status information to your T-FHSS transmitter during operation, providing invaluable real-time feedback that helps prevent power-related failures during critical racing moments. The four independent PWM output channels deliver precise servo control signals compatible with all standard RC car servos and brushless ESCs, whilst the integrated S.Bus2 port enables connection to Futaba's range of advanced telemetry sensors for comprehensive vehicle monitoring. The receiver's operating voltage range of 4.8V to 7.4V accommodates both standard 1S LiPo receiver packs and 2S configurations, making it adaptable to virtually any modern RC car electrical system. The ultra-lightweight 6.6-gram construction and compact 35.1 × 23.3 × 8.5 millimetre dimensions allow installation in space-constrained chassis without compromise, whilst the precision engineering and proven Futaba reliability ensure consistent performance through countless driving sessions. Analogue servos may cause servo trouble with this receiver, so Futaba recommends using digital servos for optimal compatibility and performance. The 2.4GHz frequency band ensures compatibility with modern RC car equipment and allows multiple vehicles to operate simultaneously without interference, making the R304SB equally suitable for casual backyard bashing, competitive club racing, and large-scale RC events throughout the UK.

What's in the Box

• Futaba R304SB 4-Channel Receiver Unit

What You Need to Complete

• Futaba T-FHSS compatible transmitter (such as Futaba T3PV or equivalent)
• RC car chassis with servo and ESC
• Receiver battery pack (1S or 2S LiPo, 4.8V to 7.4V nominal)
• Servo connectors and wiring harness (if not included with your chassis or ESC)

Frequently Asked Questions

• Is the Futaba R304SB suitable for beginner RC car builders? — Yes, the R304SB works with any standard RC car servo and electronic speed controller, making it accessible to beginners, though its advanced telemetry features will be most appreciated by experienced builders who can utilise real-time voltage monitoring. The straightforward 4-channel PWM output is identical to receivers used in entry-level RC cars, so setup is no more complex than any other receiver.
• What voltage battery does the R304SB require? — The receiver operates across 4.8V to 7.4V DC, making it compatible with 1S LiPo receiver packs (3.7V nominal) and 2S LiPo packs (7.4V nominal). Most RC car owners use dedicated 2S LiPo receiver batteries for optimal performance and telemetry reporting accuracy across the full voltage range.
• What is the difference between this receiver and other 4-channel models? — The R304SB's primary distinction is integrated T-FHSS telemetry that continuously monitors receiver voltage and reports it back to your transmitter, providing real-time power status without additional wiring or sensors. Many basic 4-channel receivers lack this telemetry capability, making the R304SB superior for competitive racing where power management is critical. The S.Bus2 port also allows expansion with additional Futaba telemetry sensors, capabilities absent in simpler receivers.
• Can I use analogue servos with the R304SB? — Futaba specifically warns that use of analogue servos may cause servo trouble with the R304SB, so digital servos are strongly recommended for reliable operation and to avoid potential compatibility issues.
• Is the R304SB waterproof? — The source material does not specify waterproofing, so this receiver should be treated as standard electronics and protected from moisture and water exposure during operation.
• What does S.Bus2 allow me to do? — The S.Bus2 port enables connection of additional Futaba telemetry sensors beyond the built-in receiver voltage monitoring, allowing you to track parameters like motor temperature, individual battery cell voltages, or GPS location data on supported transmitters. This expanded monitoring capability is invaluable for competitive RC car racing where detailed performance data informs vehicle setup changes.

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 Futaba R304SB 4-Channel (PWM) Surface Receiver with S.BUS for Telemetry T-FHSS FUT05102588-3 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.