30A SimonK Brushless Speed Controller ESC 2S-4S & 5V BEC
£14.80 Inc. VAT
30A 2-4S ESC with 3.5mm female bullets for the motor wire connections.
In stock|Next shipping: 16/03/2026
This 30A speed controller has been developed and setup specifically for multirotor use, so no programming required. Unlike generic helicopter / aeroplane ESCs, this ESC come preloaded with multirotor specific firmware preinstalled. Best still, it’s not just any old firmware; it’s the highly regarded SimonK firmware, which is optimised for multirotor applications. Google ‘SimonK firmware’ and you’ll come across lots of forum posts singing its praises. It’s designed to improve throttle precision but most importantly it can radically improve flight stability. It works by increasing the ESC refresh rate, in simple terms this means a SimonK ESC tells the motor what to do much more frequently than a non-SimonK ESC. The end product is a more ‘locked in’ feel, as the motors are able to make faster adjustments to the flight controller commands.
This particular ESC is rated at 30amps (35amp burst) and it supports 2S to 4S (11.1v – 14.8v) operation. It’s well suited to medium sized quadcopters and hexacopters. We recommend pairing this ESC with motors like the Tarot 4006 620KV.
Features:
- Developed specifically for multi rotor use
- Smooth, linear and precise throttle response
- Extreme low output resistance, super current endurance
- Supports high RPM motors
- Safe start, motor will not run until ESC is armed correctly
- N-FET design
- No low voltage cutoff – essential for multirotors
- Includes 5V 2amp BEC
- Soldered with 3.5mm gold female plugs
- Continuous current: 30A
- Burst current (10S): 35A
- BEC output: 5v / 2A (linear)
- Input voltage: LiPo 2S-4S
- Wire gauge: 16AWG
- Pre-Loaded with SimonK Firmware: Up to 490Hz refresh rates
- Weight: 24g
- Dimension: 55mm x 26mm x 8mm
Included:
- 1x 30A Multirotor ESC (SimonK Firmware)
Questions and answers of the customers
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Here at Flying Tech we have a wide choice of electronic speed controllers (ESCs).
There are two main types of ESCs: 4-in-1 ESCs and single ESCs. A 4-in-1 ESC integrates four individual ESCs onto a single circuit board, each controlling a separate motor. A single ESC controls only one motor.
This 4-in-1 ESC is a more popular choice for racing quads, while single motor aircraft such as fixed wings would use a single ESC. Single ESCs are still used by some drone racers though, as after a crash or a burnt up ESC, they only have to replace one, not an entire 4-in-1 or stack which is a lot more costly. Single ESCs are also available which much greater current ratings (80amp +) so they are also used by power hungry multi-rotors, for example X-Class racing quads, professional camera flying “Cinelifters”.
When using individual ESCs, they typically need to be connected to a single power distribution board (PDB) or an “AIO flight controller” (a type of flight controller with integrated PDB) for power supply.
SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
We dispatch orders during the times shown on our Dispatch Schedule. Orders placed before the daily dispatch cutoff will ship the same day (subject to stock availability). Orders placed after the cutoff will ship on the next scheduled dispatch day.
A confirmation email is sent once your order has been packed. If you need to amend your order, please contact us as soon as possible — once shipped, we’re unable to make changes.
We work with trusted delivery partners including Royal Mail, DHL, UPS, Fedex and Parcelforce. If you have a delivery requirement or would like to arrange collection, please get in touch.
Please fill in the fields below with the shipping destination details in order to calculate the shipping cost.
Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
For small, low-value orders, Royal Mail First Class is our most economical option. Royal Mail Tracked 24 is the most popular choice, offering full tracking and flexible delivery options. For guaranteed next working day delivery, we recommend Royal Mail Special Delivery.
Royal Mail delivers to residential addresses Monday to Saturday, while courier services (including DHL) typically deliver Monday to Friday.
International Postage
- USA orders: Import duties and taxes are prepaid by us — no additional customs charges on delivery.
- Other destinations: Customs duties or import taxes may apply and are the responsibility of the recipient.
Smaller, lower-value orders may be sent via Airmail or tracked postal services. Economy road and express air courier options are available depending on destination. For faster delivery, we recommend express air courier services such as DHL Express, which typically deliver within 1–2 working days across Europe and a few working days for most other destinations.
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