Home OpenELAB UBEC 5V 3A Step-Down Regulator for RC Receivers, 2-5S

OpenELAB UBEC 5V 3A Step-Down Regulator for RC Receivers, 2-5S

SKU: TB-UBEC5V3A
Sale price 4,57 €
incl. VAT
excl. VAT

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OpenELAB UBEC 5V 3A Step-Down Regulator for RC Receivers, 2-5S

OpenELAB UBEC 5V 3A Step-Down Regulator for RC Receivers, 2-5S

4,57 €

Compact External Power for Your RC Receiver

This 5V-class, 3A UBEC steps down a 2-5S LiPo battery supply to power a compatible RC receiver and its connected servos. It provides an external receiver power supply when an ESC has no built-in BEC, or when the existing BEC is intentionally disconnected. The motor remains powered through the ESC, not through the UBEC output.

The small module has a quoted body size of 26 x 12 x 6 mm and weight of approximately 6 g, making it useful where mounting space and weight are limited in RC cars, boats and aircraft. Match the complete receiver/servo load to the output rating before installation.

Power Delivery and Load Selection

A switching step-down circuit converts the battery voltage to a lower receiver supply. This avoids relying on a separate receiver battery in a compatible installation. Unlike a linear regulator, a switching design does not simply dissipate the entire input-to-output voltage difference as heat; actual efficiency depends on input voltage and load.

The supplier specifies 3A continuous output and a 4A short-duration rating for 10 seconds. Size the system for the continuous rating, allowing for simultaneous servo movement and startup current. The short-duration figure is not a substitute for a higher continuous-current supply.

Specifications

Parameter 3A Version
Type External switching UBEC / DC step-down regulator
Input battery 2-5S LiPo, as specified in the supplier's 3A model table
Output voltage Sold as 5V; supplier specification: 5.25V +/-0.5V
Continuous output current 3A
Short-duration output current 4A for 10 seconds, supplier-rated
Module dimensions 26 x 12 x 6 mm, supplier-quoted body dimensions
Weight Approximately 6 g, supplier-quoted
Input connection Red and black wire leads with exposed ends
Output connection Receiver-style plug with red and black power wires; no signal wire

Voltage compatibility matters: the quoted output tolerance corresponds to 4.75-5.75V. Check the permitted supply range of the receiver and every connected device; this is not a precision 5.00V supply for voltage-sensitive electronics. Support for a 6S battery is not confirmed for this 3A version.

Connecting the UBEC and ESC

  1. Disconnect the battery. Identify the UBEC input and output before wiring. Connect the input red lead to battery positive and the black lead to battery negative, in parallel with the ESC battery input.
  2. Connect the regulated output to the receiver power rail. Use an appropriate receiver power socket or a compatible spare channel with a shared power rail. Check the receiver's pinout and plug orientation; the UBEC supplies power only.
  3. If the ESC has no BEC: retain its receiver signal connection and use the UBEC as the receiver supply.
  4. If the ESC has a built-in BEC: follow the ESC manual to isolate its positive BEC lead from the receiver connection. Insulate the disconnected terminal, retaining the necessary signal and ground connections. Do not connect two BEC outputs together unless the equipment explicitly supports that arrangement.
  5. Verify before use. Check polarity, measure the output and test the receiver and servos with the motor safely disabled. Secure the wiring, insulate exposed joints and provide ventilation around the regulator.

What Is Included

One 5V 3A UBEC module with attached input wire leads and receiver-style output lead. Battery, ESC, receiver and servos are not included. The input lead ends require a suitable connection to your battery wiring; check whether your installation needs additional connectors or soldering materials.

FAQ

Can this replace an ESC?

No. It regulates power for receiver-side electronics. An ESC is still needed to control the propulsion motor.

How many servos can it power?

There is no universal servo count. Add the current requirements of the receiver and all connected loads, including simultaneous movement and stall/startup demands, then choose a supply with suitable headroom. Do not select it solely by the number of servos.

Does the output plug send a control signal?

No. It carries positive and negative power only. Control signals still come from the receiver or other controller.

Is the voltage adjustable to 6V?

No selectable 6V output is documented for this 3A version. Choose it for equipment compatible with the specified 5V-class output range.

Is it waterproof?

No waterproof rating is provided. The protective sleeve does not establish suitability for water exposure; keep the module and connections dry.

Will it monitor or charge the LiPo battery?

It is a power regulator, not a battery charger or battery monitor. Use appropriate battery management and do not rely on the UBEC for low-voltage cutoff.

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2.1 Germany Domestic Shipping

Shipping Method Order Value Cost Est. Delivery
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DHL Paket
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Shipping Method Order Value Cost Est. Delivery
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Region Shipping Method Order Value Cost Est. Delivery
Continental U.S.
(50 States)
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Order Amount Shipping Cost
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5.1 Customs and Taxes

For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.

Important Notice for Non-EU Countries:
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6. VAT

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