{ "id": "ac-feetech-sts3215-c018", "name": "Feetech STS3215-C018 12 V Serial Bus Servo", "subcategory": "smart-servos", "brand": "Feetech", "mpn": "STS3215-C018", "summary": "The 30 kg·cm, 12-bit magnetic-encoder bus servo used in the Hugging Face LeRobot SO-100/SO-101 arms; the low-cost Dynamixel-XL430 substitute.", "maker": { "name": "Shenzhen Feetech RC Model (深圳飞特模型)", "country": "CN", "role": "brand" }, "made_in": "unknown", "specs": { "stall_torque_nm": { "label": "Stall torque", "value": "30 kg·cm @ 12 V (rated 10 kg·cm)", "num": 2.942, "unit": "N·m" }, "speed_rpm": { "label": "No-load speed", "value": "0.222 s/60° (45 rpm) @ 12 V", "num": 45, "unit": "rpm" }, "voltage_v": { "label": "Voltage", "value": "4-14 V (tested at 12 V)", "num": 12, "unit": "V" }, "interface": { "label": "Interface", "value": "Half-duplex TTL serial bus (STS protocol)", "num": null }, "feedback": { "label": "Feedback", "value": "12-bit magnetic encoder (~0.088°/step)", "num": null }, "mass_g": { "label": "Mass", "value": "55 ± 1 g", "num": 55, "unit": "g" }, "ratio": { "label": "Gear ratio", "value": "345:1, copper gears", "num": 345 } }, "price": [ { "qty": 1, "usd": 27.99, "kind": "distributor", "source": "https://openelab.com/products/feetech-sts3215-c018-servo-12v", "as_of": "2026-10-29", "note": "OpenELAB US listing (ships from China warehouse)" } ], "moq": "unknown", "lead_time": "unknown", "hts": "unknown", "compliance": { "ndaa": "unknown", "blue_uas": "unknown", "fcc": "n/a", "notes": "" }, "links": { "product": "https://openelab.com/products/feetech-sts3215-c018-servo-12v", "datasheet": null, "cad": null }, "equivalents": [ "ac-dynamixel-xl430-w250-t", "ac-hiwonder-lx-16a", "ac-dynamixel-xm430-w350-t" ], "pairs_with": [], "maglev": { "custom": "Feetech states OEM/customization support; its sales mailbox bounced Sep 4 2026, current contact aaron@feetechrc.com.cn per the Eyecandy servo benchmark.", "directory_ref": null }, "sources": [ { "url": "https://openelab.com/products/feetech-sts3215-c018-servo-12v", "what": "spec table + price" }, { "url": "https://www.waveshare.com/st3215-servo.htm", "what": "Waveshare ST3215 (same spec family, maker not named) $16.99-21.99 range" } ], "confidence": "REPORTED", "category": "actuators", "subcategory_title": "Smart Serial Servos", "icon": "servo", "image": { "url": "https://parts.trymaglev.com/img/ac-feetech-sts3215-c018.webp", "thumb": "https://parts.trymaglev.com/img/t/ac-feetech-sts3215-c018.webp", "source_image": "https://openelab.com/cdn/shop/files/1_36a23eac-f858-4ce4-ac8c-049ebbb8bfb1.webp?v=1772441934&width=1920", "source_page": "https://openelab.com/products/feetech-sts3215-c018-servo-12v", "background": "removed (Apple Vision)", "as_of": "2026-10-29" }, "origin": { "code": "CN", "basis": "hq" }, "hts_resolved": { "code": "8501.10.40.60", "typical": true, "key": "hobby-servos", "basis": "subcategory", "confidence": "medium", "note": "CBP N315641 (2020): geared feedback servo (brushed DC, gearing, position sensor) 8501.10.4060." }, "us_duty_by_origin": { "as_of": "2026-10-29", "rates": [ { "origin": "CN", "duty_pct": 41.9, "possible_pct": 0, "usmca": false }, { "origin": "TW", "duty_pct": 10, "possible_pct": 0, "usmca": false }, { "origin": "VN", "duty_pct": 16.9, "possible_pct": 0, "usmca": false }, { "origin": "IN", "duty_pct": 14.4, "possible_pct": 0, "usmca": false }, { "origin": "JP", "duty_pct": 12.5, "possible_pct": 0, "usmca": false }, { "origin": "KR", "duty_pct": 12.5, "possible_pct": 0, "usmca": false }, { "origin": "DE", "duty_pct": 10, "possible_pct": 0, "usmca": false }, { "origin": "MX", "duty_pct": 14.4, "possible_pct": 0, "usmca": true }, { "origin": "US", "duty_pct": 0, "possible_pct": 0, "usmca": false } ] }, "url": "https://parts.trymaglev.com/p/ac-feetech-sts3215-c018/", "markdown": "https://parts.trymaglev.com/p/ac-feetech-sts3215-c018/index.md", "equivalents_detail": [ { "id": "ac-dynamixel-xl430-w250-t", "name": "ROBOTIS DYNAMIXEL XL430-W250-T", "brand": "ROBOTIS DYNAMIXEL", "mpn": "XL430-W250-T", "category": "actuators", "subcategory": "smart-servos", "summary": "Entry Dynamixel X with plastic gears; used in TurtleBot3 and many teaching arms.", "origin": "KR", "origin_basis": "hq", "price_usd": 27.5, "price_qty": 1, "ndaa": "unknown", "blue_uas": "unknown", "image": "https://parts.trymaglev.com/img/ac-dynamixel-xl430-w250-t.webp", "url": "https://parts.trymaglev.com/p/ac-dynamixel-xl430-w250-t/", "json": "https://parts.trymaglev.com/api/parts/ac-dynamixel-xl430-w250-t.json" }, { "id": "ac-hiwonder-lx-16a", "name": "Hiwonder LX-16A Serial Bus Servo", "brand": "Hiwonder", "mpn": "LX-16A", "category": "actuators", "subcategory": "smart-servos", "summary": "Full-metal-gear 17-20 kg·cm bus servo with position/temperature/voltage feedback on a proprietary protocol; cheap hexapod and humanoid-kit staple.", "origin": "CN", "origin_basis": "hq", "price_usd": 16.99, "price_qty": 1, "ndaa": "unknown", "blue_uas": "unknown", "image": "https://parts.trymaglev.com/img/ac-hiwonder-lx-16a.webp", "url": "https://parts.trymaglev.com/p/ac-hiwonder-lx-16a/", "json": "https://parts.trymaglev.com/api/parts/ac-hiwonder-lx-16a.json" }, { "id": "ac-dynamixel-xm430-w350-t", "name": "ROBOTIS DYNAMIXEL XM430-W350-T", "brand": "ROBOTIS DYNAMIXEL", "mpn": "XM430-W350-T", "category": "actuators", "subcategory": "smart-servos", "summary": "Metal-gear Dynamixel with current-based control for research arms (OpenMANIPULATOR-class).", "origin": "KR", "origin_basis": "hq", "price_usd": 310.39, "price_qty": 1, "ndaa": "unknown", "blue_uas": "unknown", "image": "https://parts.trymaglev.com/img/ac-dynamixel-xm430-w350-t.webp", "url": "https://parts.trymaglev.com/p/ac-dynamixel-xm430-w350-t/", "json": "https://parts.trymaglev.com/api/parts/ac-dynamixel-xm430-w350-t.json" } ], "pairs_with_detail": [] }