Spektrum Firma 85A Smart ESC 1/10 2S-3S Brushless SPMXSE1085

The Spektrum Firma 85A Smart ESC is a sensorless brushless electronic speed controller for compatible 1/10 scale 2WD and 4WD surface vehicles using 2S to 3S LiPo power, giving drivers Smart telemetry, adjustable BEC output and reliable brushless control.

The Firma 85A ESC is designed for Spektrum Smart surface systems where real-time operating data and simple installation are important. With IC3 battery input, 4mm motor bullets, multiple programming options, thermal and low-voltage protection, a cooling fan and rugged case with mounting tabs, it is a practical upgrade or replacement ESC for suitable 1/10 brushless builds.

Features

• 85A Brushless ESC: Designed for compatible 1/10 2WD and 4WD surface applications
• 2S To 3S LiPo Support: Suits 2S to 3S LiPo setups and 5 to 9 cell NiMH battery setups
• Smart All-In-One Telemetry: Sends key ESC and battery data to compatible Spektrum Smart radio systems
• 32-Bit ARM M4 Processor: Provides fast signal processing and accurate motor control
• Sensorless Brushless Motor Support: Designed for sensorless brushless surface motors
• Selectable High-Current BEC: Adjustable 6V or 7.4V BEC output at 4A continuous with 8A maximum burst
• Multiple Programming Options: Supports button programming, Smart ESC Programming Box and SmartLink USB programming
• Built-In Protection: Includes over-current protection, automatic LiPo low-voltage cutoff, thermal protection and failsafe protection
• IC3 Battery Connector: High heat-resistant IC connector is backwards compatible with suitable EC3 connectors for basic operation
• 4mm Motor Bullet Connectors: Ready for compatible brushless motor wiring with no soldering required when connectors match
• Cooling Fan And Heat Sink: Fan and aluminium heat sink help manage ESC temperature during operation
• Waterproof Rated: IP67-rated design for all-weather surface RC use when installed correctly

Specifications

• Brand: Spektrum
• Model: Firma 85A Brushless Smart ESC
• SKU: SPMXSE1085
• Product Type: Electronic speed controller
• Application: Surface RC vehicles
• Recommended Vehicle Scale: 1/10
• Recommended Vehicle Type: 2WD and 4WD surface applications
• ESC Type: Sensorless brushless
• Continuous Current: 85A
• Maximum Burst Current: 550A
• Battery Input: 2S to 3S LiPo or 5 to 9 cell NiMH
• Maximum Input Voltage: 11.1V
• BEC Type: Switch mode
• BEC Voltage: 6V or 7.4V selectable
• BEC Continuous Current: 4A
• BEC Maximum Burst Current: 8A
• Battery Input Connector: IC3
• Battery Input Wire: 12 AWG, 130 mm
• Motor Connector: 4mm female bullet
• Telemetry: SRXL2-compatible Spektrum Smart Technology
• Programming Options: Button, Smart ESC Programming Box, SmartLink USB app and compatible on-screen text programming
• Motor Limit: 5000KV on 2S LiPo and 3000KV on 3S LiPo, manufacturer listed
• Forward: Yes
• Reverse: Yes
• Brakes: Yes
• Auto Cutoff: Yes
• Overload Protection: Yes
• Waterproof Rating: IP67 rated
• Dimensions: 43.3 x 39.0 mm, 54.6 mm at tabs x 33.9 mm
• Weight: 116 g

Includes

• 1 x Spektrum Firma 85A Brushless Smart ESC
• 1 x Spektrum Smart sticker sheet
• 1 x Product manual

FAQ

What vehicles does the Spektrum SPMXSE1085 suit? The Spektrum SPMXSE1085 is designed for compatible 2WD and 4WD 1/10 scale surface vehicles using suitable 2S to 3S LiPo or 5 to 9 cell NiMH power.

Does this ESC work with sensored brushless motors? No. The Spektrum Firma 85A Smart ESC is listed as a sensorless brushless ESC.

What connector is fitted to the battery lead? The Spektrum SPMXSE1085 uses an IC3 battery input connector, which is backwards compatible with suitable EC3 connectors for basic operation.

What is needed to complete the setup? A compatible Spektrum surface receiver, Spektrum transmitter, suitable motor and suitable 2S to 3S LiPo or 5 to 9 cell NiMH battery are required.

Important Notes

• Use only with compatible sensorless brushless motors and suitable surface RC vehicles.
• Confirm motor KV, vehicle gearing, battery voltage and connector compatibility before installation.
• Smart battery telemetry requires compatible Spektrum Smart equipment.
• Advanced programming may require a Smart ESC Programming Box or SmartLink USB programmer.
• IP67 waterproof rating does not make the full vehicle waterproof. Avoid salt water, deep submersion and poor installation practices.
• Inspect wiring, fan operation, connectors and mounting security before driving.
• Battery, motor, receiver, transmitter, programming box and tools are not included unless shown separately.