JHEMCU BLHeli_S 6S 50A 30×30 4-in-1 ESC (500 X Pack)

The JHEMCU BLHeli_S 6S 50A 4-in-1 ESC is a four-channel ESC on the 30×30 mounting pattern, rated at 50A per channel and specified for 6S input, running BLHeli_S firmware.

The three figures here define what it fits. 30×30 is the mounting hole spacing used by the great majority of FPV frames, so the board drops into a standard stack. 6S is the input limit — the ESC is built for a 6-cell pack and running it above that rating is what destroys ESC boards. 50A per channel sets the motor class it suits.

BLHeli_S is the firmware that governs how the ESC drives the motors: it supports the standard protocols, current limiting and brake settings. A 4-in-1 board simplifies the wiring considerably over four individual ESCs, since power and signal reach the board once rather than at four separate points. This listing is a 500-pack at trade quantity, intended for a shop or batch build rather than a single aircraft.