# STEKI SMB04-11 Permanent Magnet Brake (2.5 Nm)

![STEKI SMB04-11 Permanent Magnet Brake (2.5 Nm)](https://parts.trymaglev.com/img/ac-steki-smb04-11.webp)

Permanent-magnet power-off brake from Shanghai Tangyi (STEKI), which markets it for humanoid joint modules; a Chinese counterpart of the Kendrion PM line.

- Maglev ID: ac-steki-smb04-11
- Brand: STEKI
- MPN: SMB04-11
- Category: actuators / Joint Holding Brakes
- Origin: CN (maker HQ, factory not confirmed)
- Maker: Shanghai Tangyi Electronics Co., Ltd. (上海堂奕电子) (brand, CN)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8505.20.0000
- MOQ: unknown · Lead time: unknown
- Confidence: VERIFIED

## Price
- No public price. Request a quote via POST /api/rfq or the order pad.

## Specifications
- Holding torque: 2.5 Nm (dynamic friction torque; static not stated)
- Voltage: 24 VDC
- Outer diameter: 44 mm (ΦA f9)
- Axial thickness: 21.4 mm (L, stator body; hub K adds to overall)
- Type: Permanent magnet, power-off, zero backlash

## Links
- Product: http://www.steki.cn/product/6/91.html
- Datasheet: none
- CAD: none

## Sources
- http://www.steki.cn/product/6/91.html (SMB spec images (SMB04-11: 2.5 Nm dynamic, DC24V 9 W, 0.2 kg, ΦA 44 mm, L 21.4 mm, hub bore 6-10 mm))
- https://www.sohu.com/a/1045123499_583075 (article: STEKI permanent magnet brakes for humanoid robots, ~6% robot-brake share 2025)