90A 8S 4-in-1 ESC
UESC-90-8S-4I-A is a 90A 8S 4-in-1 ESC for FPV and UAV teams evaluating high-current, four-motor power systems. It combines a 2–8S LiPo input range, 90A continuous and 100A peak current ratings, and an eight-layer 3oz copper PCB in a 56 × 52 mm board. For OEM selection, review the motor load profile, battery transients, power connections and available cooling together—not the current rating alone.
Four-motor ESC architecture for high-current UAV platforms
The UESC-90-8S-4I-A brings four motor switching channels onto one ESC assembly. Its 56 × 52 mm board and 33 g net weight establish the mechanical starting point for system packaging; motor outputs, power leads and cooling clearance must be considered as part of the complete installation.
Rated at 90A continuous and 100A peak with a 2–8S LiPo input range, this platform is intended for projects that need a higher-current ESC option and a structured engineering review before production selection.
High-current platform
90A continuous and 100A peak current ratings for evaluation against the intended motor loads.
Eight-layer power PCB
3oz copper construction provides the conductor architecture for motor-power routing and thermal design.
Multi-protocol control
PWM, OneShot, Multishot and DShot throttle inputs for compatible flight-controller integration.
UESC-90-8S-4I-A technical specifications
| Parameter | Specification |
|---|---|
| Model | UESC-90-8S-4I-A |
| Configuration | 4-in-1 ESC · four motor channels |
| Battery input | 2–8S LiPo |
| Continuous current rating | 90A |
| Peak current rating | 100A |
| Board outline | 56 × 52 mm |
| Net weight | 33 g |
| PCB construction | 8 layers · 3oz copper |
| Main controller | EFM8BB51 series |
| Gate driver | FD6288Q |
| Power MOSFETs | 40V-rated devices |
| Control protocols | PWM, OneShot125, OneShot42, Multishot, DShot150/300/600 |
| Motor-control functions | Hardware PWM, Damped Light |
For mechanical integration, verify the mounting-hole pattern, connector pinout and stack clearance against the selected production configuration.
Power routing, MOSFET switching and electrical interfaces
40V-rated MOSFET stage
Power-switching devices are integrated into each motor channel. In 8S systems, voltage spikes, wiring inductance and the complete supply network need review alongside device ratings.
FD6288Q gate driver
The gate-drive arrangement controls the MOSFET switching stage. Driver configuration and power-stage behavior form part of the electrical integration review.
Power filtering
Onboard LDO regulation and capacitors support control-circuit power conditioning. External supply filtering and cable routing remain system-design considerations.
Power connections are part of the current path
Battery leads, solder joints, motor pads and conductor geometry all contribute to resistive loss and localized heating. The rated ESC current is not a substitute for checking wire gauge, pad access, connector choice and expected load duration.
For an OEM project, provide battery voltage, maximum motor current, cable length and enclosure constraints so the power connection scheme can be reviewed before hardware integration.
Eight-layer 3oz copper PCB for power distribution
The eight-layer 3oz copper PCB provides a multilayer conductor structure for high-current paths, control signals and component interconnections. Copper distribution and stack-up selection help determine electrical resistance and available heat-spreading paths.
Thermal performance also depends on switching losses, PCB layout, airflow, mounting arrangement and operating duty cycle. These factors should be reviewed under the target platform's actual conditions rather than inferred from copper weight alone.
EFM8BB51 control with PWM-to-DShot600 compatibility
PWM and OneShot
PWM, OneShot125 and OneShot42 provide throttle-input options for compatible flight-controller configurations.
Multishot and DShot
Multishot and DShot150/300/600 expand the available throttle signal protocols.
Damped Light braking
Electronic braking supports more responsive motor deceleration when enabled under a compatible control configuration.
Flight-controller compatibility should be checked at the electrical interface, including signal order, ground reference, wiring and motor mapping. The selected firmware build and control settings should be confirmed for the production hardware revision.
For UAV platforms where current demand and cooling drive ESC selection
High-current FPV development
For quad-motor platforms evaluating a 2–8S supply and higher-current ESC architecture.
UAV system integration
For engineering teams coordinating motor loads, FC signals, battery wiring and mechanical packaging.
OEM hardware programs
For sourcing teams defining repeatable ESC configurations, integration requirements and acceptance criteria.
Platform suitability is determined by the aircraft's actual electrical and thermal requirements, not the ESC's nominal current rating alone.
Multilayer power-PCB manufacturing for ESC hardware
UltroNiu supports the PCB fabrication requirements of high-current motor-control electronics, including stack-up review, copper patterning, solder-mask definition and bare-board verification against approved fabrication data.
Assembly inspection and project-defined functional verification
High-current ESC assembly requires attention to MOSFET placement, solder-joint formation, high-current pads and the mechanical interface between PCB and wiring. Inspection scope can be aligned to the approved BOM, assembly drawings and product acceptance plan.
Relevant steps for customer-specific projects can include component sourcing, SMT assembly, AOI, bare-board electrical testing and powered functional checks. Load testing criteria should be defined with the final motor, battery and cooling requirements.
90A ESC sourcing and custom PCB/PCBA project support
Product sourcing
Discuss the 90A 8S four-in-one ESC configuration, required quantity, commercial terms and delivery requirements.
Hardware integration review
Review the selected FC interface, mounting envelope, battery wiring, thermal provisions and load profile.
Custom electronics projects
Request PCB fabrication and PCBA manufacturing support for customer-defined ESC designs and approved engineering files.
Questions from ESC engineering and sourcing teams
What is the current rating of the UESC-90-8S-4I-A?
The ESC has a 90A continuous and 100A peak current rating. Its suitability for a specific aircraft depends on motor demand, duty cycle, cooling, battery wiring and system-level verification.
Can this ESC be used with an 8S LiPo battery?
The specified input range is 2–8S LiPo. For 8S applications, review battery transients, voltage margin, filtering and wiring layout as part of the complete power system.
What are the PCB size and product weight?
The board outline is 56 × 52 mm and the stated net product weight is 33 g. Confirm hole locations, stack clearance and connector orientation against the chosen hardware revision before installation.
What PCB construction does the 90A ESC use?
It is specified with an eight-layer PCB and 3oz copper construction. Actual temperature rise depends on load, switching losses, layout and airflow.
Which throttle protocols are supported?
The specified interfaces include PWM, OneShot125, OneShot42, Multishot, DShot150, DShot300 and DShot600. Verify signal wiring and controller configuration during integration.
How should I evaluate cooling and high-current wiring?
Provide expected motor current, operating duration, battery configuration, cable gauge, airflow and enclosure details. These inputs help establish the appropriate thermal and electrical checks.
Can UltroNiu support OEM supply or custom PCB and PCBA manufacturing?
Yes. Contact UltroNiu about this ESC configuration or a separately defined custom hardware project. PCB fabrication, assembly requirements and agreed inspection or test criteria can be reviewed against your engineering documentation.
Request a quote for the 90A 8S 4-in-1 ESC
Share your expected order quantity, battery voltage, motor current profile, flight-controller interface and target delivery schedule. For custom hardware, attach available PCB data, BOM, drawings or test requirements.
Request Engineering ReviewEmail Our TeamAlso exploring lower-current options? View the 55A 8S 4-in-1 ESC.
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