Spedix IS40 40A 4in1 Mini ESC (3-6S) (20x20mm) the most reliable 20mm esc stack supporting up to 6s racing drones. 

Spedix do it yet again with a stylish and compact esc that is designed to keep weight down and also comes in a small form factor and in a all in one package saving weight and space .
The IS40 is a 20x20mm 4in1 ESC that runs BLheli_S and supports 3-6S Lipo.  It packs in the reliability and low noise you love about a Spedix ESC.  This ESC features a separated power and control board to allow for a tiny sized ESC with seriously impressive specs (40A, with 6S support)

Key Features

• Innovative double-deck design enables the implementation of full-size 5*6 MOSFET on 20*20mm mini 4IN1 ESC.
• 40V MOSFET improves the overall reliability in fast response to throttle signals，making the 6 cell input capable in the real world.
• Silicone rings insulate standoffs, PCB, and parts.
• Extremely small size makes mounting on smaller frames easier than ever.

Specification

• Brand name: Spedix
• Item name: IS40 40A ESC
• Input:3-6 Cell LiPo
• Continuous Current: 40A
• Burst Current: 50A≤10S
• BEC: No
• Current Detection: YES
• Firmware: BLHeli_S
• Dimensions: 40x31x8mm
• Mount Holes: 20x20mm
• Weight：13.2g

Included

• 1 x IS40 40A Blheli_S 2-6S 4 IN 1 Brushless ESC

SPX7107X