Futaba R3204SB 4-Channel PWM Air Receiver T-FHSS FUT05102738-3

Overview

The Futaba R3204SB is a compact and lightweight 4-channel PWM air receiver designed specifically for aircraft models, offering exceptional versatility and dependable control for RC aircraft enthusiasts throughout the UK. This sophisticated piece of radio control equipment combines traditional four-channel PWM output with advanced 18-channel S.BUS capability, making it an ideal choice for pilots who want to expand their aircraft's control options without requiring a larger receiver footprint. Whether you're flying fixed-wing aircraft, drones, or other aerial platforms, the R3204SB delivers the precision control and reliability that Futaba is renowned for in the RC hobby community.

Weighing just 4.8 grams, this receiver is engineered for space-restricted airframes where every gram matters. The compact dimensions of 41.4 x 18 x 9.9 millimetres mean the R3204SB can be installed in tight fuselages, wings, or tail booms without compromising your aircraft's weight distribution or performance characteristics. For RC aircraft UK pilots looking for professional-grade equipment that won't break the bank, the R3204SB represents outstanding value and proven performance backed by Futaba's 60+ years of radio control expertise.

This receiver operates within Futaba's T-FHSS Air telemetry system, which provides Link ID support for secure, interference-free communication with compatible Futaba transmitters. The 1S LiPo capability makes the R3204SB incredibly flexible for modern aircraft installations, allowing you to power the receiver from lightweight, high-performance lithium polymer batteries that are standard throughout the RC hobby. Combined with its dual diversity antenna system and telemetry functionality, the R3204SB is the intelligent choice for serious RC aircraft pilots who demand reliability and precision.

Key Features

• T-FHSS Air Telemetry System with Link ID Support — This advanced radio protocol ensures secure, encrypted communication between your transmitter and receiver, protecting against interference from other RC equipment operating on the 2.4GHz frequency band. Link ID support means your receiver will only respond to your specific transmitter, giving you complete confidence in the security and reliability of your RC aircraft control link.
• 4-Channel PWM + 18-Channel S.BUS Output — The receiver provides four standard PWM channels for direct servo control, whilst also supporting up to 18 channels via S.BUS protocol. This dual-protocol capability makes the R3204SB compatible with both traditional RC aircraft setups and modern, complex aircraft requiring multiple servo functions through a single S.BUS data line.
• Ultralight 4.8 Gram Construction — Weighing less than five grams, the R3204SB is one of the lightest receivers available for aircraft models. This minimal weight is critical for RC aircraft performance, directly improving flight characteristics, battery runtime, and overall handling by reducing the aircraft's centre of gravity burden.
• Compact 41.4 x 18 x 9.9mm Dimensions — The receiver's tiny footprint is specifically designed for space-restricted installations found in lightweight aircraft, FPV drones, and scale models where traditional receiver sizes would compromise the aircraft's design or performance. The slim profile allows installation in locations that would be impossible with standard receivers.
• 1S LiPo Capable Operation — The R3204SB operates efficiently from single-cell lithium polymer batteries (1S LiPo), which have become the standard in modern RC aircraft due to their exceptional power-to-weight ratio. This capability makes the receiver ideal for electric-powered RC aircraft where battery weight is critical to flight performance.
• Wide Operating Voltage Range 3.7-7.4V DC — The receiver accommodates input voltages from 3.5V to 8.4V, providing flexibility for various battery configurations whilst maintaining stable operation across the full discharge curve of your power source. This wide voltage acceptance ensures consistent performance from battery pack installation through to final discharge.
• Dual Diversity Antenna System — The included dual diversity antenna arrangement provides superior reception reliability by monitoring multiple signal paths simultaneously. This advanced feature is particularly valuable in RF-challenging environments or when flying at distance, ensuring consistent control signal reception in real-world flying conditions.
• Telemetry Capability — Built-in telemetry support allows compatible Futaba transmitters to receive live data from your aircraft systems, enabling real-time monitoring of battery voltage, signal strength, and other critical flight parameters directly on your transmitter display.
• 2.4GHz Frequency Band Operation — Operating on the internationally recognised 2.4GHz frequency band, the R3204SB is compatible with modern Futaba T-FHSS Air transmitters and benefits from the noise immunity and reliable performance characteristics of this crowded but well-regulated frequency spectrum used throughout the global RC hobby.

Technical Performance

The Futaba R3204SB represents the pinnacle of modern receiver engineering for RC aircraft applications, combining cutting-edge technology with proven reliability in a package so small and light that it virtually disappears once installed in your aircraft. The receiver's construction utilises premium-grade components throughout, with professional-quality PCB design and manufacturing standards that ensure consistent performance across temperature ranges and environmental conditions typical of RC aircraft operation. The T-FHSS Air protocol implemented in this receiver uses frequency-hopping spread spectrum technology, which provides both security and resistance to radio interference—critical features for RC aircraft UK pilots operating in busy RC flying sites where multiple aircraft may be airborne simultaneously. The dual diversity antenna system continuously monitors incoming signals, automatically selecting the strongest signal path to maintain uninterrupted control authority regardless of aircraft orientation or distance from the transmitter. With support for both PWM and S.BUS protocols, the R3204SB bridges traditional and modern RC aircraft designs seamlessly; operators can use the four dedicated PWM channels for elemental controls like aileron, elevator, rudder, and throttle, or step up to the full 18-channel S.BUS data stream for complex aircraft requiring simultaneous control of multiple servos through a single signal line. The receiver's ability to operate from input voltages between 3.5V and 8.4V, with nominal operation at 3.7-7.4V DC, makes it perfectly suited to single-cell lithium polymer batteries that have revolutionised RC aircraft performance. This wide voltage tolerance ensures stable operation whether you're starting a flight with a freshly charged 1S LiPo at 4.2V or nearing the end of the flight cycle as battery voltage gradually decreases. The 4.8-gram weight specification is achieved through careful engineering and material selection, ensuring that every component serves a critical purpose without unnecessary bulk. For RC aircraft enthusiasts seeking professional-grade receiver technology in the smallest, lightest package available, the R3204SB delivers uncompromising performance backed by Futaba's reputation for excellence in RC radio control systems.

What's in the Box

• Futaba R3204SB 4-Channel PWM / 18-Channel S.BUS Receiver
• Dual Diversity Antenna Assembly

Frequently Asked Questions

• Is the Futaba R3204SB suitable for beginner RC aircraft pilots? — The R3204SB is designed primarily for intermediate to advanced RC aircraft pilots who appreciate the advanced features, compact size, and telemetry capabilities this receiver offers. Beginner pilots typically benefit from larger, more robust receivers with more straightforward installation requirements. However, if you're an experienced fixed-wing aircraft pilot upgrading your RC aircraft equipment or a drone enthusiast familiar with compact electronics, the R3204SB would be an excellent choice. The receiver's reliability and Futaba's comprehensive documentation support pilots at various skill levels once they understand basic RC systems.
• What battery does the Futaba R3204SB need? — The R3204SB is designed specifically for 1S LiPo (single-cell lithium polymer) batteries, operating optimally between 3.7V and 7.4V DC nominal voltage. In practical terms, this means you'll power the receiver from lightweight 1S LiPo batteries that have become standard in modern RC aircraft due to their exceptional power-to-weight ratio. The receiver's input voltage tolerance of 3.5-8.4V provides flexibility across the typical discharge curve of a 1S LiPo battery from full charge through to safe minimum discharge levels. Always ensure your battery management system includes proper low-voltage cutoff protection to prevent over-discharging your 1S LiPo, which can permanently damage the battery cells.
• What is the difference between the four PWM channels and 18-channel S.BUS capability? — The R3204SB provides four traditional PWM (pulse-width modulation) channels, which are the standard control method for individual servos in RC aircraft. Each PWM channel sends a separate signal to one servo, so you can directly control four servos using the four PWM outputs. Additionally, the receiver supports S.BUS protocol, a digital data stream that can carry up to 18 individual servo signals down a single data wire to a compatible S.BUS servo controller or flight computer. This flexibility means you can use traditional RC aircraft with basic four-servo setups using PWM, or upgrade to complex modern aircraft with multiple control surfaces using the S.BUS capability without needing a larger receiver.
• How does the dual diversity antenna system improve RC aircraft performance? — The dual diversity antenna system continuously monitors signals arriving at both antennas simultaneously, automatically selecting whichever antenna is receiving the strongest signal at any given moment. This switching happens many times per second, ensuring that your aircraft always receives the strongest possible control signal regardless of aircraft orientation, distance, or environmental radio interference. In practical flying conditions, especially at distance or in areas with metallic structures or radio noise sources, this dual diversity arrangement provides noticeably improved range and control signal reliability compared to single-antenna receivers.
• Is the R3204SB waterproof or weather-resistant? — The R3204SB is not explicitly rated as waterproof in Futaba's specifications, so it should be treated as standard electronics that require protection from water and moisture. Typical installation practice in aircraft models includes mounting the receiver in a protective box or tube within the fuselage, naturally sheltering it from rain and condensation. For outdoor flying operations, ensure your aircraft is not left exposed to water when not in use, and store the receiver in a dry environment.
• Can I use the R3204SB with transmitters other than Futaba? — The R3204SB is specifically designed for operation with Futaba T-FHSS Air transmitters that support this receiver's protocol and Link ID pairing system. It is not compatible with transmitters from other manufacturers such as Spektrum, JR, or other brands. Always verify that your Futaba transmitter supports the R3204SB receiver before purchasing to ensure full compatibility and access to all telemetry and advanced features.
• What is the shipping weight and dimension specification? — The receiver itself weighs 4.8 grams and measures 41.4 x 18 x 9.9 millimetres, making it extraordinarily compact and lightweight for space-restricted aircraft installations. The shipping weight for the packaged receiver is 0.05 kilograms (approximately 50 grams), which includes the protective packaging and antenna assembly.

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 R3204SB 4-Channel (PWM) Air Receiver (18-Channel S.BUS) T-FHSS 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.