Surpass Hobby waterproof 120A ESC Red & Black 3-6S Lipo – RC Speed Controllers
Surpass RC

Surpass Hobby waterproof 120A ESC Red & Black 3-6S Lipo

★★★★★
4.3 · 12 reviews
£34.99 £49.99 Save 30%
In Stock — ships today
SKU KS-300003-06 Category RC Speed Controllers
🚚 Calculating…
24hr or 48hr delivery — choose at checkout ✓ Free delivery on orders over £129.99

What our customers say

A selection of recent five-star reviews, as written.

  • Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.

    Robert, 22 September 2026

  • Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.

    Anna Abbott, 17 September 2026

  • Excellent service speedy delivery and good customer service

    GLYN, 10 September 2026

  • Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.

    Paul Jordan, 3 September 2026

  • Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!

    Oliver Galustian, 23 July 2026

  • Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.

    Simon, 19 July 2026

  • Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍

    Mark Clucas, 30 January 2026

  • The customer service and advice were first class!

    Steve Avery, 9 September 2025

  • The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.

    Pete Goddard, 15 April 2025

  • Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.

    Graham Rousseau, 10 February 2025

🚚 Calculating…
24hr or 48hr delivery — choose at checkout ✓ Free delivery on orders over £129.99

Key Specs

🔋
Battery Type
LiPo
🔋
Cell Count
6S
🔌
Connector
Multi

About this product

Declaration:
This is Electronic Speed Controller (ESC) for car. High power system for RC model is very dangerous, so please read this manual carefully.
Since we can’t control over the correct use, installation, application, or maintenance of our products, we’veno liability shall be assumed nor accepted for any damages,
losses or costs resulting from the use of the product. Any claimsarising from the operating, failure of malfunctioning etc. will be denied.
We assume no liability for personal injury,consequential damages resulting from our product or our workmanship.
Features:
1. Water- proof and dust-proof for all-weather races; (Note: please uninstall the cooling fan before using this ESC in water;Clean and dry it soon after the use for avoiding the connectors get rusty.)
2. Specially designed for RC car with excellent start-up, acceleration and linearity features.
3. Compatible with sensorless brushless motor.
4. The strong resistant current capability, excellent heat dissipation.
5. Multiple protection features: Low voltage cut-off protection for litium or nickel battery /Over-heat protectionThrote signal loss protection / Motor blocked protection/
6. Easily programmed and compatible with pocket-sized program card.
Specification:
Brand: SURPASSHOBBY
Name: KK 120A ESC
Cont.Current/Burst Current: 120A/600A
Motor Type: Sensorless Brushless Motor
For 4S Lipo or 12 cells NiMH :
                    1. on-road: 40XX-Size or smaller motor with the KV<3000KV
                    2. off-road/Buggy/Monster: 40XX-size or smaller motor with the KV <2500KV
For 6S Lipo or 18 cells NiMH :
                    1. on-road: 40XX-Size or smaller motor with the KV<2500KV
                    2. off-road/Buggy/Monster: 40XX-size or smaller motor with the KV <2000KV
Suitable Car: 1/8th or 1.10th Car
Resistance: 0.00035ohm
Battery: 3-6S Lipo/9-18Cells NiMH
BEC Output: 6.1V/3A (Switch mode)
Dimensions/Weight: 160x100x62mm/135g
Programming card
Brand: SURPASS HOBBY
Low voltage cut off: 3.1V/Cell 2.8V/Cell 3.3V/Cell No cut-off
Start mode:Medium, soft, strong
Max brake force: 25%, 50%, 75%, 100%
Max reverse force: 25%, 50%, 75%, 100%
Neutral range: 6%, 9%, 12%, work state

Browse the full Surpass RC range at Radio Controlled UK, including Surpass RC brushless motors, Surpass RC ESCs and Surpass RC motor and ESC combos. View all current stock in the Surpass RC product archive.

What our customers say

A selection of recent five-star reviews, as written.

  • Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.

    Robert, 22 September 2026

  • Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.

    Anna Abbott, 17 September 2026

  • Excellent service speedy delivery and good customer service

    GLYN, 10 September 2026

  • Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.

    Paul Jordan, 3 September 2026

  • Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!

    Oliver Galustian, 23 July 2026

  • Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.

    Simon, 19 July 2026

  • Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍

    Mark Clucas, 30 January 2026

  • The customer service and advice were first class!

    Steve Avery, 9 September 2025

  • The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.

    Pete Goddard, 15 April 2025

  • Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.

    Graham Rousseau, 10 February 2025

Customer Reviews

4.3
★★★★★
Based on 12 reviews

You might also like

Before we chat…

Please add your email so we can reply later if we are offline or dealing with another customer.

Please enter a valid email address.