20x20 4-in-1 ESCs
20x20 4-in-1 ESCs
28 products
A 20x20 4-in-1 ESC is the mini version of the stack ESC: four motor controllers on a board with 20×20mm mounting holes. It is the size used on 3 to 4-inch quads, light 5-inch racers and any frame without room for a full 30x30 stack. Mini boards now reach 60A and more, so the size no longer limits a 6S build. This page collects every 20x20 4-in-1 ESC in our range. Choose by current, cell count and firmware.
How to choose a 20x20 4-in-1 ESC
- Current: 35–45A suits 3 to 4-inch builds and light 5-inch quads on 4S or 6S. 55–65A covers a hard-flown 5-inch on 6S. A few boards go to 80A.
- Voltage: most are 3–6S; some mini boards take 8S. Check the range on the listing.
- Heat: a small board has less copper to shed heat. Boards with a heat sink or a metal case cope better with long full-throttle runs, and all of them want airflow.
- Firmware: BLHeli_S boards run Bluejay; 32-bit boards run BLHeli_32 or the open-source AM32.
- Hole size: 20×20 stacks use M2 or M3 screws depending on the board and frame — check both, and use the soft grommets supplied.
What we stock
iFlight Blitz Mini E55 and E55S, Blitz E55R and the Borg 60R for 3–8S; Foxeer Reaper F4 Mini 45A and 60A and the Reaper Slim 60A; T-Motor F60A Mini and F66A Mini; Hobbywing XRotor G2 45A; HGLRC Specter 60A; Skystars KM35, KM55A and MVP60; SEQURE Blueson A1 in 6S 65A and 8S 70A; SpeedyBee BLS 35A Mini V2; Flywoo GOKU G45M; JHEMCU EM40A; and the NewBeeDrone Hummingbird 200 RaceSpec 80A.
Compatibility
A 20x20 ESC pairs with a 20x20 flight controller in the same stack. Frames with only a 30.5×30.5mm pattern need an adapter plate. The 8-pin cable to the flight controller is not wired the same way by every brand, so compare the pinouts before plugging in. Solder pads are smaller than on a 30x30 board: use suitably sized motor and battery wire and a capacitor on the battery pads.
Frequently asked questions
- Can a 20x20 ESC run a 5-inch 6S quad?
- Yes, with a board rated 45A or more. Many current 5-inch racing and freestyle builds use 20x20 stacks of 55–65A to save weight.
- Will a 20x20 ESC fit a 30x30 frame?
- Only if the frame also has a 20×20mm pattern, or with an adapter plate. Many modern 5-inch frames have both patterns in the centre section.
- Do 20x20 ESCs run hotter than 30x30 ones?
- They have less board area to spread heat, so at the same current they run warmer. Keep the stack in the airflow and choose a board with a heat sink for sustained high-throttle flying.