40A 6S 4-in-1 ESC 4S – 6S
Four sensorless BEMF channels on one board: 40 A continuous and 80 A peak (180 s) per channel, 4S – 6S LiPo, 22 g ± 5 g. NDAA compliant, designed and built in India, on open BLHeli_S or Bluejay firmware.
4-in-1
Designed and built in India
Vector Technics
- Compliance
- NDAA · RoHS
- Firmware
- BLHeli_S · Bluejay
- Throttle input
- PWM · DShot300
- Signal connector
- 6-pin JST SH
- Internal BEC
- None · power the FC separately
- Outline
- 53 × 51.5 × 4.41 mm
- Mounting
- 4 × Ø 4 mm · 30.5 × 30.5 mm
- Mass
- 22 g ± 5 g · without heatsink
- Operating ambient
- –50 to +80 °C
- Lead time
- Confirmed on quote
More thermal headroom for long, high-current missions. Ask for it on your quote.
The design choices and trade-offs behind the board.
White paper coming soonEvery batch ships with a certificate of conformance (CoC).
Boards are populated in-house, so build quality and schedule stay in our hands.
Video coming soonWill the PropelCore 4-in-1 drive your motors?
Enter your supply and what one motor draws at hover and at peak. The check compares them with the per-channel ratings; it does not model your motor or cooling. Need more than 40 A continuous? Ask about our single-channel ESCs.
Good fit
Inside both current limits with margin.
What are the specifications of the PropelCore 40A 6S 4-in-1 ESC?
Board Ver 1.4, the current production revision. Continuous ratings assume adequate external cooling; ambient temperature, airflow and duty cycle change them. Specifications may be revised without notice.
- Input voltage
- 4S – 6S LiPo Up to 25.2 V, 6S fully charged
- Peak current
- 80 A Per channel, 180 s
- Total current
- 160 A All four channels, 4 × 40 A continuous
- Channels
- 4 Independent, one per motor
- Internal BEC
- None Power the flight controller separately
- Control
- Sensorless BEMF Back-EMF sensing, sensorless BLDC motors
- PWM range
- 1000 – 1950 µs Automatic recognition
- Refresh rate
- 50 – 500 Hz Configurable
- Advance timing
- 15 – 30 ° Adjustable, with startup power
- Firmware
- BLHeli_S · Bluejay Standard configuration tools
- Dimensions
- 53 × 51.5 × 4.41 mm L × B × H, board Ver 1.4
- Mounting
- 30.5 × 30.5 mm 4 × Ø 4 mm holes
- Signal connector
- JST SH 6-pin 1.0 mm pitch, both cable ends identical
- Operating ambient
- –50 – +80 °C Module maximum 125 °C
- Heatsink
- Optional Ask for it on your quote
- Compliance
- RoHS · NDAA PCB 1.6 mm · external cooling
Full specification tableAll values, parameters and conditions
| Parameter | Value | Condition |
|---|---|---|
| Electrical | ||
| Input voltage | 4S – 6S LiPo | Up to 25.2 V, 6S fully charged |
| Maximum continuous current | 40 A | Per channel, adequate external cooling |
| Maximum peak current | 80 A | Per channel, 180 s |
| Total current, all channels | 160 A | Four channels combined, 4 × 40 A continuous, adequate external cooling |
| Internal BEC | No | — |
| Control and signal | ||
| Control strategy | Sensorless BEMF | — |
| Supported motor type | Sensorless BLDC | — |
| Throttle signal type | PWM, DShot300 | — |
| PWM type | Auto recognition | — |
| PWM range | 1000 – 1950 µs | — |
| Refresh rate | 50 – 500 Hz | — |
| Advance timing | 15° – 30° | Adjustable |
| Programmability | Advance timing, startup power | BLHeli_S and Bluejay configuration tools |
| Firmware | BLHeli_S, Bluejay | — |
| Mechanical and environment | ||
| Dimensions (L × B × H) | 53 × 51.5 × 4.41 mm | Board Ver 1.4 |
| PCB thickness | 1.6 mm | — |
| Weight | 22 g ± 5 g | Without heatsink |
| Operating temperature | –50 to +80 °C | Ambient |
| Maximum temperature | 125 °C | Module |
| Cooling | External | — |
| Heatsink | Optional extra | Ask for it on your quote |
| Compliance | RoHS, NDAA | — |
| Signal connector | 6-pin JST SH | 1.0 mm pitch, both cable ends identical |
| Mounting | 4 × Ø 4 mm | 30.5 × 30.5 mm pattern |
How do you integrate the PropelCore 4-in-1?
Pinout, throttle signals, mounting and thermal limits, in the order your integration team needs them.
How do you wire the PropelCore 4-in-1?
Select a pad or a table row to identify it. Swap any two phase wires to reverse a motor. Reverse battery polarity destroys the ESC.
| Pin | Label | Connection | Description |
|---|
Wire gauge and length can be customised on request.
Which throttle signals does it accept?
PWM from 1000 to 1950 µs, recognised automatically, or DShot300. Move the throttle to see one channel's signal. The DShot view draws the standard frame: 11 throttle bits, 1 telemetry bit, 4 checksum bits. Telemetry support is not stated, so that bit is shown off.
How do you mount the PropelCore 4-in-1?
Four Ø 4 mm holes on a 30.5 × 30.5 mm pattern. Add vibration isolation on harsh airframes.
How hot can the PropelCore 4-in-1 run?
Module maximum 125 °C; operating ambient –50 to +80 °C. The continuous rating depends on the airflow you give the board.
Why do enterprise UAV programmes choose the PropelCore 4-in-1?
Open firmware, one locked production revision, harnesses built to your airframe, and direct access to the engineers who designed the board.
Open BLHeli_S and Bluejay
Configure it with tools your team already uses. No proprietary lock-in.
One production revision
Every board shipped is Ver 1.4, marked on the silkscreen. This page is built from the Ver 1.4 production files.
Built to your harness
Lead length and gauge made to order, so boards arrive ready to fit.
Engineering, enquiry to deployment
Fit checks, wiring reviews and bring-up support from the design team.
What happens after you get in touch?
From first enquiry
to your airframe
Steps, not weeks. Lead time is confirmed on the quote.
Qualifying the PropelCore 4-in-1 for a programme?
Send your airframe, motors, propeller, supply and volume. One engineer owns your enquiry through to delivery and confirms lead time and harness options on the quote.
What do engineers ask about the PropelCore 4-in-1?
Is the PropelCore 40A 6S 4-in-1 ESC NDAA compliant?
Yes. Designed and built in India by Vector Technics.
Which firmware does it run?
BLHeli_S or Bluejay. Both are established, openly documented ESC firmware, set up with standard configuration tools.
What current can the PropelCore 40A 6S 4-in-1 ESC handle?
40 A continuous and 80 A peak (180 s) per channel; 160 A for all four channels combined. Ratings assume adequate external cooling.
What battery voltage does it accept?
4S to 6S LiPo, up to 25.2 V on a fully charged 6S pack. Check VDC and GND before connecting: reverse polarity destroys the ESC.
Does the PropelCore 40A 6S 4-in-1 ESC come with a heatsink?
As an optional extra. Ask for it on your quote. The 22 g ± 5 g mass excludes the heatsink.
Does it have a built-in BEC?
No. Power the flight controller and receiver from a separate BEC or DC-DC converter.
Which throttle protocols does it support?
PWM (1000 – 1950 µs, auto-recognised) and DShot300. PWM refresh rate is configurable from 50 to 500 Hz.
Can I change the timing and startup power?
Yes. Advance timing is adjustable from 15° to 30°, and startup power is programmable, in standard BLHeli_S and Bluejay tools. Ask us for recommended settings for your motor.
How is it mounted?
Four Ø 4 mm holes on a 30.5 × 30.5 mm pattern. Board 53 × 51.5 × 4.41 mm, 1.6 mm PCB, 22 g ± 5 g without heatsink.
What happens if the signal is lost?
It re-arms only after a valid zero-throttle command, which is standard ESC behaviour.