# moteus r4.11 Brushless Servo Controller

![moteus r4.11 Brushless Servo Controller](https://parts.trymaglev.com/img/mo-moteus-r4-11.webp)

46 x 53 mm open-source FOC servo controller with onboard absolute encoder and 5 Mbps CAN-FD daisy chain, built for quadruped-style dynamic robots.

- Maglev ID: mo-moteus-r4-11
- Brand: mjbots
- MPN: moteus-r4-11
- Category: motors / Motor Drivers & Controllers
- Origin: US (maker HQ, factory not confirmed)
- Maker: mjbots Robotic Systems (brand, US)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8504.40.40.00 (typical)
- MOQ: 1 · Lead time: unknown
- Confidence: VERIFIED

## Price
- 1+: $94 (list, 2026-10-29, https://mjbots.com/products/moteus-r4-11)

## Specifications
- Bus voltage: 10-44 V (<=10S)
- Continuous current: 12 A / 32 A phase (without / with thermal management)
- Peak current: 100 A phase
- Interface: 5 Mbps CAN-FD
- Feedback: Onboard absolute magnetic encoder
- Peak electrical power: 900 W @ 30 V
- Mass: 14.2 g
- Dimensions: 46 x 53 mm
- Firmware: Open source, Apache 2.0

## Links
- Product: https://mjbots.com/products/moteus-r4-11
- Datasheet: none
- CAD: https://mjbots.com/products/moteus-r4-11

## Equivalents
- ODrive S1 Single-Axis BLDC Controller (mo-odrive-s1)
- CubeMars Driver Board V2.1 (AK70-10 and up) (mo-cubemars-driver-board-v2-1)
- mjbots moteus-c1 Brushless Servo Controller (mo-moteus-c1)
- Tinymovr R5.4 FOC Brushless Controller (mo-tinymovr-r5-4)

## Works with
- CubeMars RI60 KV120 Frameless Inrunner Torque Motor (mo-cubemars-ri60-kv120)
- CubeMars GL60 KV25 Gimbal Motor (mo-cubemars-gl60-kv25)
- CubeMars GL80 KV30 Gimbal Motor (mo-cubemars-gl80-kv30)
- mjbots mj5208 Brushless Motor (mo-mjbots-mj5208)
- CubeMars RI50 KV100 Frameless Inrunner Torque Motor (mo-cubemars-ri50-kv100)
- CubeMars RI70 KV95 Frameless Inrunner Torque Motor (mo-cubemars-ri70-kv95)
- CubeMars RI100 KV105 Frameless Inrunner Torque Motor (mo-cubemars-ri100-kv105)
- CubeMars RI75-PH KV70 Potted Frameless Torque Motor (mo-cubemars-ri75-ph-kv70)
- CubeMars RI85-PH KV85 Potted Frameless Torque Motor (mo-cubemars-ri85-ph-kv85)
- CubeMars RI115-PH KV40 Potted Frameless Torque Motor (mo-cubemars-ri115-ph-kv40)
- CubeMars RO40 KV140 Lite Frameless Outrunner Torque Motor (mo-cubemars-ro40-kv140-lite)
- CubeMars RO50 KV108 Lite Frameless Outrunner Torque Motor (mo-cubemars-ro50-kv108-lite)
- CubeMars RO60 KV115 Frameless Outrunner Torque Motor (mo-cubemars-ro60-kv115)
- CubeMars RO100 KV55 Frameless Outrunner Torque Motor (mo-cubemars-ro100-kv55)

## Sources
- https://mjbots.com/products/moteus-r4-11 (price + full spec list (also via Shopify products.json))