The Hobbywing 3A UBEC 5V/6V External Switching BEC for 2-6S LiPo RC Models is a compact external receiver-power regulator designed for RC setups that need stable voltage for receivers, gyros, servos, and other onboard electronics. It draws power from a 2S to 6S LiPo battery and converts it into a safe, consistent 5V or 6V output at up to 3A.

This external switching BEC is useful when your ESC has no built-in BEC, when you are using an OPTO ESC, or when the ESC’s built-in BEC is not strong enough for your servo load. Compared with a traditional linear BEC, the switch-mode design offers higher efficiency on higher-voltage setups, especially 4S, 5S, and 6S LiPo systems.

With switchable 5V/6V output, 2-6S LiPo input support, reverse polarity protection, and EMI reduction design, this Hobbywing UBEC is a practical power accessory for RC airplanes, helicopters, boats, cars, crawlers, and custom RC models.

Product Specifications

Key Features

• 3A external UBEC: Provides stable receiver and servo power for RC models that need a separate BEC solution.
• 5V/6V switchable output: Select 5V or 6V output using the jumper cap to match your receiver and servo requirements.
• 2-6S LiPo input support: Works with common 2S, 3S, 4S, 5S, and 6S LiPo power systems.
• Switch-mode efficiency: More efficient than a traditional linear BEC, especially when used with higher-voltage LiPo packs.
• 5A peak current: Supports short burst current demand up to 5A for 10 seconds.
• EMI reduction design: Shielded electronics and output filtering help reduce electromagnetic interference.
• Reverse polarity protection: If battery polarity is connected incorrectly, the UBEC will not work but is designed to avoid damage from that mistake.
• Compact and lightweight: Small 11g design makes it easy to install in airplanes, helicopters, boats, cars, and other RC models.

When Should You Use This Hobbywing 3A UBEC?

Use this Hobbywing 3A UBEC when your RC model needs a stable external BEC instead of relying only on the ESC’s built-in BEC. It is especially helpful for models with multiple servos, higher-voltage LiPo setups, OPTO ESCs, or receiver systems that require a cleaner and more reliable power path.

For 4S to 6S LiPo systems, a switching BEC is often a better choice than a linear BEC because it reduces wasted heat and improves efficiency. This makes the UBEC-3A-6S a practical option for RC airplanes, helicopters, boats, crawlers, and custom builds where receiver-power stability matters.

Installation Notes

• Connect the UBEC input wires to the main battery power source.
• Plug the UBEC output lead into a spare receiver channel or receiver power input port.
• If your ESC has no built-in BEC, no ESC-side BEC change is required.
• If your ESC already has a built-in BEC, disable the ESC’s BEC before using this external UBEC.
• Keep the UBEC at least 5cm away from the receiver to reduce possible electromagnetic interference.
• Check your receiver and servo specifications before selecting 5V or 6V output.

User Manual

For wiring details, setup notes, and installation guidance, please refer to the official Hobbywing 3A UBEC user manual.

Recommended Applications

• RC airplanes using 2S to 6S LiPo power systems
• RC helicopters with receiver, gyro, and servo power demand
• RC boats or cars using external receiver-power setups
• OPTO ESC systems that require a separate BEC
• Custom RC models where stable 5V/6V electronics power is needed

For more ESC and power-system options, explore our Hobbywing ESCs, ESC Programmers & Accessories, and External BEC & UBEC collections.

FAQ

What is this Hobbywing 3A UBEC used for?

This Hobbywing 3A UBEC is used to power your receiver, gyro, servos, and other onboard electronics from a stable 5V or 6V output. It is useful when your ESC has no BEC, when the built-in BEC is not strong enough, or when you want a separate receiver-power solution.

Can I use this UBEC with a 6S LiPo battery?

Yes. This UBEC supports 2-6S LiPo input, with an input voltage range of 5.5V to 26V.

Should I choose 5V or 6V output?

Choose 5V for standard receiver and servo setups that require 5V power. Choose 6V only if your receiver, gyro, and servos support 6V operation. Always check the electronics specifications before changing the jumper setting.

Do I need to disable the ESC’s built-in BEC?

Yes, if your ESC already has a built-in BEC and you want this UBEC to power the receiver, the ESC’s built-in BEC should be disabled first. This avoids powering the receiver from two BEC outputs at the same time.

Is this the same as an ESC?

No. This product is not an ESC. It does not control the motor. It is an external BEC used to provide stable power to the receiver, servos, gyro, and other low-voltage electronics.