Product overview
The HAKRC BLS 35A 4IN1 ESC from Shenzhen Haike Technology Co., Ltd. integrates four motor-control channels into a compact electronic speed controller. Its physical architecture combines an EMF8BB21F16G processor operating at up to 48MHz, a three-in-one IC driver and ceramic capacitors on a six-layer board with 3oz copper. The controller measures 31*30*6 mm and weighs 6.1g. For installation planning, it uses 20*20mm mounting hole spacing and M3 apertures, defining the board footprint and mounting interface within a UAV assembly.
Electrical integration requires a 2-6S supply, with maximum continuous working current specified as 35A and maximum instantaneous current as 40A. The controller uses BLHeli-S firmware, with version BL16.7 specified, and BLHeliSuite assistant software. Supported inputs include PWM, OneShot125, OneShot42, MultShot and DShot150/300/600. Hardware PWM provides motor drive, while Damped Light regenerative braking and active freewheeling support motor deceleration and energy recovery. Parameter adjustment and firmware upgrades can use the throttle signal line, other development boards, or a flight controller running Cleanflight or Betaflight.
Specifications
| Specification | Value & conditions |
|---|---|
| Model | HAKRC BLS 35A 4IN1 ESC |
| Product type and channel count | Four-channel electronic speed controller |
| Product size | 31*30*6 mm |
| Product net weight | 6.1g |
| Packing size | Φ62*33mm |
| Packing weight | 13 g |
| Mounting hole spacing | 20*20mm |
| Mounting aperture | M3 |
| Working voltage | 2-6S |
| Maximum continuous working current | 35A |
| Maximum instantaneous current | 40A |
| Supported throttle protocols | DShot150/300/600, PWM, OneShot125, OneShot42 and MultShot |
| Assistant software | BLHeliSuite |
| Firmware version | BL16.7 |
| Firmware family | BLHeli-S |
| Processor | EMF8BB21F16G; operating frequency up to 48MHz |
| Driver and capacitors | Three-in-one IC driver and ceramic capacitors |
| Circuit board construction | Six-layer board with 3oz copper |
| Motor drive | Hardware PWM motor drive |
| Braking and freewheeling | Damped Light regenerative braking and active freewheeling |
| Parameter setting and firmware upgrade methods | Multiple interfaces support ESC parameter setting and firmware upgradesThrough the throttle signal line, other development boards, or a flight controller using Cleanflight or Betaflight firmware. |
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