CAT-D02DOM-01 · Drone components
Electronic speed controllers
Current handling, thermal headroom, and firmware ecosystem.
An ESC is rated at conditions almost no airframe reproduces. The number that matters is what it sustains in your enclosure, at your ambient, with your airflow — which is generally well below the number on the label.
Validation record
DR-04 · Electronic speed controller
01Deciding parameters
The figures that actually decide selection — and why.
Continuous current
A
The design figure. Peak ratings are burst-duration only.
Burst current / duration
A / s
Meaningless without the duration it is held for.
Voltage range
S
Must survive pack top-of-charge, not nominal.
Firmware
—
BLHeli_32, AM32, proprietary — decides tuning and support life.
Thermal derating
%/°C
The difference between a bench rating and a flight rating.
02Where it is used
Application changes the answer.
- Multirotor — stability and throttle response under rapid transients
- Heavy-lift — sustained current with genuine thermal margin
- Industrial UAV — reliability across a continuous duty cycle
- VTOL transition — two distinct load regimes through one controller
03Decision drivers
What the choice actually turns on.
- Continuous rating against real load, with derating for enclosure ambient
- Firmware ecosystem and how long it will be maintained
- Cooling path — conduction, airflow, and mounting as part of the rating
- Matched behaviour with the selected motor and pack
- Protection behaviour on stall, desync, and over-temperature
04What we hold
The intelligence behind this category.
Actual manufacturer behind a brand, where several brands share one plant
Firmware support and update history by vendor
Real against claimed continuous current under controlled conditions
Observed failure modes by application class
05What to watch for
Where selection in this category turns.
Sizing on peak rather than continuous current
Treating firmware compatibility as a detail rather than a constraint
Ignoring thermal path under sustained load
Pairing an ESC and motor that were never characterised together
Beyond this page
SKU-level intelligence sits behind the requirement.
Validated supplier records, per-SKU parameter data, pricing bands, MOQ patterns, and lead-time history for electronic speed controllers are released against a stated application — because a shortlist is only meaningful once the operating conditions are known.
06Coupled decisions in drone components
Motor · ESC · propeller · pack are selected as one set. Selecting any one of these without the others is the most common source of rework in this domain.
Start with the application
Sourcing electronic speed controllers?
Send the application and the operating conditions. We map the landscape, validate the claims, and return a shortlist with the reason each option is on it.