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Top highlights
45A Current Capacity: Provides robust power delivery for demanding 3-6S setups.
6-layer PCB Build: Designs with over-current protection against electrical surges.
Wide Protocol Support: Compatible with DSHOT150/300/600, MultiShot, and OneShot.
Integrated Telemetry: Supports Voltage, RPMs, & Current with real-time power system monitoring.
30.5x30.5mm Mounting Pattern: Cost-effective for quadcopter frames with BLHeli_S firmware.
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About this product:
The Skystars KO45 BLHeli_S 4-in-1 ESC has a 6-layer design and over-current capabilities. With BLHeli_S firmware, this ESC is a cost-effective solution for your quad.
Check out our 30x30 4in1 ESCs, all ESCs Collection and the rest of our Skystars Products!
For tinkerers, this is a gem. BLHeli_S is fully featured, and the ESC takes firmware flashes well. Excellent platform for learning and experimenting without risk.
Specification：KO45 45A
V*********r
Verified
The best budget ESC I've used. Performance rivals more expensive brands. For beginners or anyone on a tight budget, you can't go wrong here.
Specification：KO45 45A
B**************r
Verified
Takes a beating! I've crashed this quad more times than I can count. The ESC keeps on working. The conformal coating seems decent. Amazing durability for the price.
Specification：KO45 45A
Additional reviews after 41
days
After a particularly nasty crash that broke an arm, the ESC is still perfect. Tough as nails.
Replied by MEPSKING:Tough as nails is the goal! Glad it's surviving your flying adventures.
C************t
Verified
Using this on a 3.5-inch cinewhoop. The power is smooth and predictable, perfect for capturing stable footage. Handles 4S and 6S without any drama.
Specification：KO45 45A
Replied by MEPSKING:Smooth and predictable power is ideal for cinewhoops. Great choice!
L*****************2
Verified
Perfect for my efficient 6S long-range cruiser. Sips power and runs cool. Setup was straightforward. Provides reliable, clean power for extended flights.
Specification：KO45 45A
Replied by MEPSKING:Perfect for those long, relaxing cruises. Enjoy the extended flight times!
B**************9
Verified
Incredible value. The 45A rating is solid for most 5-inch builds. After dozens of packs, it runs cool and consistent. For the cost, it's unbeatable.
Specification：KO45 45A
Additional reviews after 177
days
6 months in, still going strong. Survived multiple minor crashes.
Replied by MEPSKING:That's what we like to hear - unbeatable value and durability. Thanks for the update!
A*************V
Verified
Fantastic ESC for the price! Flashed Bluejay without issues, runs my 5-inch quad smoothly and reliably. Great entry point into BLHeli_S without breaking the bank.
Specification：KO45 45A
Replied by MEPSKING:Welcome to the hobby! Glad to hear it's serving you well as a reliable starter ESC. Happy flying!
R***********r
Verified
Used this in a lightweight 5-inch racer. Throttle response is good, and it stayed cool during practice sessions. A solid, dependable choice for club-level racing.
Specification：KO45 45A
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FAQFeel free to ask us any questions
Q: What is the KO45 ESC used for?
A: It is designed for standard 5-inch FPV freestyle drones.
Verified