FRSKY XACT  Series  MD5301H Coreless Servo
The Xact series coreless servos utilize a fully CNC machined aluminum protective case and benefit from metal gears. These high-voltage servos are capable of supporting up to 8.4V and offer both high speed and torque performance. The Xact series servos are available in multiple form factors and configurations to fit many different model types especially where power, reliability, and precision are required.
 
These high-quality servos support the FBUS protocol, which allows telemetry data (like real-time current, voltage, temperature, etc.) of Xact servos to be transmitted back to the radio by connecting either FBUS capable receiver or flight controller. The Xact servos offer configurable servo travel (90° / 120° / 180°). Servo travel along with other options are now available to be set via the ETHOS Xact configuration tool or the Freelink app.
 
FEATURES
● Supports Port 2.0 (FBUS) SBUS and PWM protocol
● High durability with metal gear and all-aluminum CNC machined protective case
● 8.4V high voltage capable operation with good speed performance
● Built-in dual precision balls bearing with hall sensor
● Supports over-current and over-hot monitor and alarm
● Updatable firmware ensures the performance superior
 
Why We Recommend This
The XACT MD5301H is the go-to coreless servo for fixed-wing pilots who want FBUS telemetry feedback from their servos — position data, temperature, and load live on your radio screen. It's the precision upgrade for scale aircraft where knowing exactly what your control surfaces are doing matters. FPV Builds RC provides U.S.-based product support and setup guidance for FrSky products purchased through our store.
Frequently Asked Questions:
 
What is the difference between the FrSky Xact and Act servo series?
The Xact series (like the MD5301H) is FrSky's premium servo line, featuring CNC-machined aluminum cases, metal gears, coreless motors, and — uniquely — built-in F.Port 2.0 telemetry support. Xact servos can report position, load, voltage, and temperature back to your transmitter via FBUS when used with the S2F Port 2.0 converter. The Act series is a capable high-voltage servo line with CNC aluminum cases and metal gears but without the FBUS telemetry feature. Choose Xact when you need servo health monitoring in flight; choose Act for a high-performance servo at a more accessible price point.
 
What voltage range does the MD5301H support?
The XACT MD5301H is a high-voltage (HV) servo designed to run on 6.0V–8.4V. Running at 8.4V (a 2S LiPo fully charged) delivers maximum torque and speed performance. Always confirm your receiver or BEC output voltage is in the HV range before connecting — standard 5V BEC output will power the servo but at reduced performance.
 
What torque and speed does the MD5301H deliver?
At 7.4V the MD5301H delivers approximately 5.3 kg·cm of torque at 0.075 sec/60° speed, and at 8.4V performance increases further. Refer to the FrSky MD5301H spec sheet for voltage-specific torque and speed figures. The coreless motor provides fast, smooth response with minimal mechanical play — well-suited for precision flight surfaces.
 
Does the MD5301H support FBUS telemetry?
Yes — the Xact series including the MD5301H supports F.Port 2.0 protocol, which enables servo position, load, temperature, and voltage telemetry feedback to your FrSky transmitter. To use this feature, connect the servo to an https://www.fpvbuildsrc.com/product-page/frsky-s2f-port-2-0-protocol-converter S2F Port 2.0 converter, which translates the SBUS + S.Port signals from a compatible receiver into F.Port 2.0 outputs. This is the feature that separates the Xact series from standard digital servos.
 
Which aircraft applications is the MD5301H best suited for?
The MD5301H is designed for scale aircraft, aerobatics planes, and any fixed-wing model where precision, reliability, and load monitoring are important. The compact form factor and CNC aluminum case make it suitable for installation in tight servo bays on sport and scale airframes. The metal gears handle the load of larger control surfaces reliably across temperature extremes.
 
Are FrSky Xact servos compatible with all receivers?
The MD5301H uses a standard 3-pin PWM connector and is compatible with any RC receiver that outputs PWM servo signals — not just FrSky receivers. The F.Port 2.0 telemetry feature specifically requires FrSky hardware (an S2F Port 2.0 converter and a compatible FrSky receiver), but basic PWM control works with any brand receiver.
 
Does FPV Builds RC offer setup support for the FrSky Xact servo line?
Yes. FPV Builds RC is a U.S.-based FrSky dealer and our team can advise on Xact servo selection, HV BEC requirements, and S2F Port 2.0 telemetry setup. Browse the full FrSky lineup at https://www.fpvbuildsrc.com/frsky.