Buying Guidance for
Foxeer Mini Reaper 128K 45A BL32 4-in-1 ESC：
Why is this ESC a Good Choice?
Choosing a 4-in-1 ESC for a performance-focused FPV build means finding the right balance between current capacity, firmware capability, size, and weight. The Foxeer Mini Reaper 128K 45A BL32 4-in-1 ESC is designed around this balance, combining four 45A ESC channels with up to 65A burst current per channel in a compact 20x20mm mounting format. With BLHeli32 firmware, 128K PWM support, telemetry, and 3–6S LiPo compatibility, it is a strong option for pilots building compact 5-inch freestyle and racing quads that need substantial current headroom without moving to a larger ESC footprint.
Pros and Cons of the Foxeer Mini Reaper 45A
Before adding this ESC to your build, consider the following performance advantages and hardware limitations:
Pros:
● 45A continuous and 65A burst current per channel provides plenty of current capacity for demanding FPV motor setups.
● BLHeli32 firmware with 128K PWM support gives pilots extensive ESC configuration options and smooth motor control.
● Supports 3–6S LiPo input, making it suitable for a wide range of modern FPV quad power systems.
● The 20x20mm M3 mounting pattern keeps the ESC compact while retaining a high 45A current rating.
● Telemetry and multiple signal protocols, including DShot 150/300/600/1200, MultiShot, and OneShot, provide flexible integration with compatible flight controllers.
Cons:
● The ESC does not include a BEC, so your flight controller and other peripherals must have an appropriate power solution.
● Its performance-oriented BLHeli32 platform and extensive configuration options are better suited to pilots who are comfortable with ESC setup and tuning.
A Comparison between Foxeer Mini Reaper 45A and Skystars KO45
Both ESCs offer a 45A continuous current rating and 3–6S compatibility, but they are aimed at different priorities. The Foxeer Mini Reaper focuses on a compact 20x20mm installation, BLHeli32 firmware, 128K PWM support, and a lightweight 10g design, while the Skystars KO45 uses a larger 30.5x30.5mm mounting pattern and BLHeli_S firmware.
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| Specification | Foxeer Mini Reaper 45A | Skystars KO45 |
|---|
| Mounting Pattern | 20x20mm M3 | 30.5x30.5mm M3 |
| Weight | 10g | 13.3g |
| ESC Firmware | BLHeli32 | BLHeli_S |
| PWM Refresh Rate | Up to 128K | Up to 48K |
| Current Rating | 45A Continuous / 65A Burst | 45A Continuous |
| Input Voltage | 3–6S LiPo | 3–6S LiPo |
| Telemetry | Supported | Supported |
| Target Application | Performance 5-inch Builds | Full-size 5-inch Builds |
Which one should you choose?
● Choose the Foxeer Mini Reaper 45A if you want a compact 20x20mm ESC with 45A continuous current, 65A burst capability, BLHeli32 firmware, and 128K PWM support for a performance-oriented 3–6S FPV build.
● Choose the Skystars KO45 if your frame is designed around a 30.5x30.5mm mounting pattern and you prefer a larger full-size ESC using BLHeli_S firmware.
Verified