Review: Holybro Tekko32 F3 Metal ESC

The Holybro Tekko32 F3 65A ESC is probably by far one of the most premium ESC on the FPV market for 4S and 6S setup. It features “Metal Capped” MOSFET’s that have superior cooling ability, with an incredible 65A continuous current rating.

Want to learn more about ESC for racing drones?

Where to Buy?

You can find the Tekko32 F3 65A Metal ESC from these vendors:

Holybro also makes a cheaper but lower current version (35A): http://bit.ly/2wN4hxk

Specs and Features of Tekko32 F3 Metal 65A ESC

  • Continours Current: 65A
  • Burst Current: 80A
  • Supports Input Voltage 3S to 6S LiPo
  • STM32 F3 MCU
  • BLHeli32 Firmware
  • Built-in WS2812B LED
  • Supports ESC Telemetry
  • MOSFET: IRF7480M
  • MOSFET Gate Driver: Fortior FD6288
  • “New” Current Sensor (shunt resistor) with supposedly even lower resistance and higher efficiency
  • Size: 18×27 mm (single ESC)
  • Weight: 4.3g (single ESC)
  • Size: 42x42mm with 30.5×30.5mm mounting holes (4in1 ESC)
  • Weight: 11.9g (4in1 ESC)

The reason these ESC’s are called “Metal”, is because of the “metal capped” MOSFET. These are basically “built-in cooling system” for the FET’s. The MOSFET’s are German made IRF7480M, and if you look at the datasheet they actually have a higher theoretical current and voltage rating. The 65A rating is based on the testing that Holybro has done ensuring reliability.

You might also notice the copper bars on these ESC’s, that’s the busbar. Busbars are often used to reduce resistance in high current applications like ESC, and It also helps to dissipate heat.

Apart from beefy MOSFET, the next biggest selling point is probably the faster F3 processor!

As pointed out previously in our news leak when the first F3 ESC came out, there isn’t really any performance gain yet comparing to ESC’s using the slower F0 MCU. At the moment it’s just more future-proofing when it comes to firmware development.

It’s recommended to use extra low ESR capacitors for 6S setup. The good news these ESC’s come with some capacitors.

A Closer Look at the Single ESC

The Tekko32 65A ESC comes with a bunch of 16 AWG silicone wires for power, and 24 AWG wires for signal, signal ground and ESC telemetry. All wires are 10cm long.

Comparing to the previous Tekko32 35A ESC’s with F0 micro controller, these F3 ESC’s are somehow even smaller in size, despite the nearly doubled current rating.

Here is a close up of the single ESC. Aren’t they just beautiful? :D The build quality and choice of components are just top notch!

There are a ton of capacitors for noise filtering, and notice the busbar on the right.

The solder pads are GND, TLM (ESC Telemetry), and PWM (signal).

Each ESC comes with an electrolytic capacitor of an unfamiliar brand, performance is yet to be found out. The weight of the ESC is 4.3g, 9.3g with 10cm wires.

Be extremely careful though – the metal cover on the MOSFET is actually connected to one of the MOSFET’s terminals (drain)! It would be a good idea to put heatshrink over the ESC.

Tekko32 F3 Metal 65A 4in1 ESC

The 4in1 ESC comes with the following accessories:

  • Metal 4in1 ESC
  • Two ribbon cables for connecting to the FC (3cm and 7cm)
  • 4 nylon standoffs
  • 470uF 35V Capacitor
  • Holybro stickers
  • Plastic box

Here is a close-up of the Tekko32 F3 Metal 4in1 ESC. The motor pads are well sized and should be very easy to solder. From the motor labels, it appears the ESC is designed to be installed with the XT60 solder pads facing the rear of the frame.

Flip it over, you will notice the 4in1 ESC header connector is reinforced by epoxy glue – a nice touch.

I also like how they have broken out some of the connector pins to the solder pads on top of it, making it flexible how you want to connect the 4in1 ESC to the flight controller.

The connector pins are (from left to right): VBAT, TEL, GND, CuR, M1 to M4.

The solder pads are: TEL, CUR, M1 to M4.

The 7cm ribbon cable is long enough to reach to the other side of the ESC.

Motor wires are not designed to be soldered on the bottom side of the 4in1 ESC.

Again the capacitor that it comes with is of the same unfamiliar brand, and the performance is yet to be tested. It’s 470uF rated at 35V, to be honest I think that might be on the small side for a 6S built, even for a powerful 4S build. It would have been nice to see a 1000uF 35V or even 50V cap included instead.

Finally, make sure you keep the MOSFET’s from anything conductive including carbon fibre, because the metal caps are connected to the FET’s terminal!

Testing

I will put these ESC’s to the test and report back if there is any issues.

8 thoughts on “Review: Holybro Tekko32 F3 Metal ESC

  1. Scott McClarin

    on GD32 MCU’s vs STM32….FYI…cnx-software.com/2015/12/21/gigadevice-gd32-is-a-faster-software-and-pin-to-pin-stm32-compatible-cortex-m3-mcu/

    Reply
  2. Rob

    Isn’t it overkill? We don’t need (IMO) that much power for our quads… 65*4 = 260A, do we have batteries that can supply 260A continuous?

    Reply
    1. Oscar Post author

      You don’t have to use it only on 5″ racing quads, you can also use it on bigger aircrafts with bigger packs like 6S 5000mah

      Reply

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