The World's Smallest, Lightest Switch-Mode Super BEC

S-BEC is a highly integrated and sophisticated switch-mode power supply operating from 5.5V to 50V input and producing a constant 5V or 6V output (depending on version), with any load up to 2.5A continuous – suitable for up to 8 standard servos or 6 digital servos. Besides being the smallest and lightest switch-mode BEC in the world, thanks to the latest integrated circuit technology it also has the highest input voltage rating, allowing the use of up to 41 NiCd or Ni-MH cells (1.2V per cell). S-BEC is also compatible with Li-Ion and Li-Poly cells. S-BEC has special components to cater for the high instantaneous current draw that servos usually require. Although this instantaneous current may be above 2.5A, the continuous current draw of each servo is very much less, and S-BEC is designed to handle both these current ‘spikes’ and the continuous current requirements of both standard and digital servos.

Until the introduction of the S-BEC, switching BEC were noted for producing high noise levels, which can interfere with radio reception.  But the new S-BEC is much smaller and the tracks, which become antennas that radiate EMI, are as short as 5mm. This greatly reduces emissions and also takes them into a non-conflicting frequency range. S-BEC also uses a shielded inductor, which was the biggest source of EMI in non-shielded switching BEC. Another unique feature of the S-BEC is that the switching circuitry, including MOSFETs, are all packed in a single monolithic device, which further quiets the device.  Finally, this latest version includes  a "Common Mode" noise damper, which further quiets the range in which RC receivers are most sensitive.

In fact, Electronic Speed Controllers (ESC) for throttle control generate noise several times that of the S-BEC.  Just the same, both ESC and S-BEC should be placed as far as possible from the receiver.  That is simply safest, standard practice.

Connections

Connect the red and black input leads to the ESC, making sure that the polarity is correct. Red is connected to the Positive (+) wire while black is connected to the Negative (-). To connect the S-BEC to the +/ - input wires on the ESC, we recommend Dean's Micro connectors. Connect the 3‑way RC connector to the receiver battery socket or an unused socket. Note that although the orange (signal) lead is present on the 3-way RC cable, it is unused and is only to help with correct polarity alignment. The figure below shows a typical electric model setup with S‑BEC used to supply power to the receiver from a high-cell-count battery pack. If your ESC uses integrated BEC circuit, be sure to disable it following the manufacturer’s instructions.  Usually this can be accomplished by removing the pin for (+) voltage from the ESC’s connector to receiver throttle channel.  

 See User's Manual Here (Adobe Acrobat Format)