Sunrise Siskin BLHeli_32 21amp ESC

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The Siskin BLHeli_32 21amp ESC is the latest evolution in BLHeli ESCs. BLHeli_32 is the third generation of BLHeli code, following base BLHeli and BLHeli_S.

Running on ARM 32bit MCUs, the latest iteration of BLHeli can run input signals with lower latency at faster rates.  DShot up to at least DShot1200, and at rates up to at least 32kHz.

The 32bit MCU also allows additional functionality.

This includes:

  • Programmable pwm frequency, which allows motors to run more smoothly
  • Auto Timing, which runs motors efficiently and protects against desync
  • Variable Brake Force, allows control of braking force on fixed wing props
  • Improved bidirectional mode

On top of these features, new functions will be programmed in the future.  This includes setup from the FC by using Dshot commands, telemetry functionality (similar to KISS24amp ESCs) and current limiting. There is room to grow performance and functionality.


  • Product Name: BL-ARM 21A
  • MCU:  ARM 32-bit
  • Continuous Current: 21A
  • Peak Current(10s): 26A
  • BEC: No
  • LiPo: 2-4s
  • Programming card: YES
  • Weight: 2.0 g
  • Size(PCB): 25x12mm

1x Sunrise Siskin BLHeli_32 21amp ESC

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