# Readytosky 2-6S UBEC (5 V / 12 V): specs

> A voltage regulator (UBEC) for LiPo packs of 2S to 6S with a 5 V or 12 V output at 3 A. The maker lists it for powering telemetry, brushless gimbals…

[HTML version](https://soldr.ai/docs/components/readytosky-ubec-5v-12v)

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A voltage regulator (UBEC) for LiPo packs of 2S to 6S with a 5 V or 12 V output at 3 A. The maker lists it for powering telemetry, brushless gimbals and flight controllers.

Every value cites its sourcePinout not published

[Buy on Compoden](https://compoden.com/products/readytosky-2-6s-5v-3a-and-12v-3a-switchable-ubec)

## Specs

| Spec | Value | Source |
|---|---|---|
| Input voltage | 2-6S | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |
| Output voltage | 5 V or 12 V, switchable | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |
| Output current | 3 A | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |
| 12 V output condition | Maker note: for 12 V output use a 4S-6S battery; a 3S battery cannot give 12 V | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |

## Power

| | Value | Source |
|---|---|---|
| Supply | 2-6S battery input; output 5 V or 12 V | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |
| Current | 3 A (output rating) | source Readytosky 2-6S 5V/3A and 12V/3A Switchable UBEC, Specifications |

## Pinout
We don't publish a pin table for this part: no official source we could verify gives one. Check the labels printed on your module, and see the notes below.

The maker page gives no pin or wire table.

## Build with it
Project ideas for the Readytosky 2-6S UBEC (5 V / 12 V). Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

- [Supervised ESP32 weather readout from a LiPo](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20supervised%20ESP32%20weather%20readout%20powered%20from%20a%20LiPo%20through%20a%205%20V%20UBEC%20with%20an%20XT60%20connector%2C%20a%20fuse%20and%20a%20low-voltage%20alarm): A short bench session, not a logger left running. The 3S pack is inside the 2S to 6S input range and the 5 V setting is allowed for a 3S pack; the ESP32 board takes the 5 V on its 5 V input. Set the switch to 5 V and confirm with a multimeter before connecting anything. The UBEC has no low-voltage cut-off (the maker page lists none), so the alarm is the only warning: stay beside the pack while it is connected and unplug it when you walk away. Join the pack to the UBEC input leads through an XT60 pair, and fit a blade fuse in the positive pack lead using an inline blade-fuse holder you already own (the fuse only counts when a holder is fitted) (a 5 V 3 A output draws about 1.4 A from a 3S pack plus losses; the maker lists no input current, so a 5 A fuse is a starting point, not a maker figure). Charge only with the balance charger inside the LiPo charging bag, never unattended; disconnect the pack before touching any wiring. Learning project.
- [Two-servo pan and tilt from a LiPo](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20pan%20and%20tilt%20mount%20with%20two%20SG90%20servos%20and%20an%20ESP32%20powered%20from%20a%20LiPo%20through%20a%205%20V%20UBEC): The UBEC is set to 5 V and feeds the servos and the ESP32 board's 5 V input; the output is rated 3 A and the servo stall current is not documented, so test one servo at a time and join the grounds. LiPo handling: charge only with the balance charger inside the LiPo charging bag, never unattended; fit the low-voltage alarm; disconnect the battery before touching any wiring. Learning project. The 3 A rating is the output limit and the servo stall current is not documented, so test one servo at a time and join the grounds. Set the switch to 5 V and confirm with a multimeter before connecting anything. The UBEC has no low-voltage cut-off (the maker page lists none), so the alarm is the only warning: stay beside the pack while it is connected and unplug it when you walk away. Join the pack to the UBEC input leads through an XT60 pair, and fit a blade fuse in the positive pack lead using an inline blade-fuse holder you already own (the fuse only counts when a holder is fitted) (a 5 V 3 A output draws about 1.4 A from a 3S pack plus losses; the maker lists no input current, so a 5 A fuse is a starting point, not a maker figure).
- [A radio-controlled servo mount where an RC receiver and an SG90 servo run from a 3S LiPo through a 5 V UBEC](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20radio-controlled%20servo%20mount%20where%20an%20RC%20receiver%20and%20an%20SG90%20servo%20run%20from%20a%203S%20LiPo%20through%20a%205%20V%20UBEC): At 5 V the UBEC output is inside the FS-R6B's 4.0 V to 6.5 V supply range, so the pack voltage never reaches the receiver directly. LiPo handling: charge only with the balance charger inside the LiPo charging bag, never unattended; fit the low-voltage alarm; disconnect the battery before touching any wiring. Learning project. Set the switch to 5 V and confirm with a multimeter before connecting the receiver: the 12 V setting would exceed the receiver's 6.5 V limit. The UBEC has no low-voltage cut-off (the maker page lists none), so the alarm is the only warning: stay beside the pack while it is connected and unplug it when you walk away. Join the pack to the UBEC input leads through an XT60 pair, and fit a blade fuse in the positive pack lead using an inline blade-fuse holder you already own (the fuse only counts when a holder is fitted) (a 5 V 3 A output draws about 1.4 A from a 3S pack plus losses; the maker lists no input current, so a 5 A fuse is a starting point, not a maker figure).

## Common mistakes

- For the 12 V output use a 4S to 6S pack; a 3S pack cannot give 12 V ([source](https://www.readytosky.com/e_productshow/?951-Readytosky-2-6S-5V3A-and-12V3A-Switchable-UBEC-951.html=)).
- The maker page does not say how the 5 V or 12 V output is chosen, so check the selected output with a multimeter and no load before connecting a 5 V board ([source](https://www.readytosky.com/e_productshow/?951-Readytosky-2-6S-5V3A-and-12V3A-Switchable-UBEC-951.html=)).
- The UBEC has no low-voltage cut-off (the maker page lists none), so a LiPo can still be over-discharged while the regulator runs; watch the pack voltage, fit a low-voltage alarm and do not leave it connected unattended ([source](https://www.readytosky.com/e_productshow/?951-Readytosky-2-6S-5V3A-and-12V3A-Switchable-UBEC-951.html=)).

## Not covered by the official source

- The maker page gives no efficiency, protection list, dimensions, weight, switching method or wire details, so these are empty.
- The maker gives no adjustment range.

## Sources

- [link](https://www.readytosky.com/e_productshow/?951-Readytosky-2-6S-5V3A-and-12V3A-Switchable-UBEC-951.html=) (Readytosky product page, 2-6S 5V/3A and 12V/3A Switchable UBEC)