{ "mpn": "unknown", "maker": { "name": "SpeedyBee (Zhuhai KuaiFeng Technology Co., Ltd.)", "country": "CN", "role": "brand" }, "made_in": "unknown", "price": [], "moq": 1, "lead_time": "unknown", "hts": "unknown", "links": { "product": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "datasheet": "https://store-fhxxhuiq8q.mybigcommerce.com/product_images/img_SpeedyBee_F405_V4_Stack/SpeedyBee_F405_V4_Stack_Manual_EN.pdf", "cad": null }, "equivalents": [ "dr-ark-4in1-esc", "dr-holybro-tekko32-f4-50a" ], "pairs_with": [ "dr-speedybee-f405-v4-stack", "dr-iflight-xing2-2207-1855kv" ], "maglev": { "custom": "", "directory_ref": null }, "confidence": "VERIFIED", "id": "dr-speedybee-bls-55a-4in1", "name": "SpeedyBee BLS 55A 4-in-1 ESC (F405 V4 stack ESC)", "subcategory": "escs", "brand": "SpeedyBee", "summary": "BLHeli_S 3-6S 55 A 4-in-1 ESC sold as the lower half of the SpeedyBee F405 V4 stack.", "specs": { "cont_current_a": { "label": "Continuous current", "value": "55 A x4 (70 A burst 10 s)", "num": 55, "unit": "A" }, "cells": { "label": "Cells (LiPo)", "value": "3-6S", "num": 6, "unit": "S max" }, "protocol": { "label": "Protocol", "value": "DShot300/600 (BLHeli_S J-H-40)" }, "weight_g": { "label": "Weight", "value": "23.5 g", "num": 23.5, "unit": "g" } }, "sources": [ { "url": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "what": "ESC specs" } ], "compliance": { "ndaa": "unknown", "blue_uas": "not-listed", "fcc": "n/a", "notes": "Price recorded only for the full stack ($65.99, dr-speedybee-f405-v4-stack). Page also claims 220 A total continuous / 280 A peak, inconsistent with per-channel figures." }, "category": "drone", "subcategory_title": "Electronic Speed Controllers", "icon": "esc", "image": { "url": "https://parts.trymaglev.com/img/dr-speedybee-bls-55a-4in1.webp", "thumb": "https://parts.trymaglev.com/img/t/dr-speedybee-bls-55a-4in1.webp", "source_image": "https://cdn11.bigcommerce.com/s-fhxxhuiq8q/products/226/images/1244/SB_f405mini-12__87958.1696500182.386.513.jpg?c=2", "source_page": "https://www.speedybee.com/speedybee-f405-v4-bls-55a-30x30-fc-esc-stack/", "background": "removed (Apple Vision)", "as_of": "2026-10-29" }, "origin": { "code": "CN", "basis": "hq" }, "hts_resolved": { "code": "8504.40.40.00", "typical": true, "key": "escs", "basis": "subcategory", "confidence": "medium", "note": "8504.40.9580 for use in UAS is 100% Section 232 since 2026-09-03; 8504.40.40 is not listed." }, "us_duty_by_origin": { "as_of": "2026-10-29", "rates": [ { "origin": "CN", "duty_pct": 37.5, "possible_pct": 0, "usmca": false }, { "origin": "TW", "duty_pct": 10, "possible_pct": 0, "usmca": false }, { "origin": "VN", "duty_pct": 12.5, "possible_pct": 0, "usmca": false }, { "origin": "IN", "duty_pct": 10, "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": 10, "possible_pct": 0, "usmca": true }, { "origin": "US", "duty_pct": 0, "possible_pct": 0, "usmca": false } ] }, "url": "https://parts.trymaglev.com/p/dr-speedybee-bls-55a-4in1/", "markdown": "https://parts.trymaglev.com/p/dr-speedybee-bls-55a-4in1/index.md", "equivalents_detail": [ { "id": "dr-ark-4in1-esc", "name": "ARK Electronics ARK 4IN1 ESC", "brand": "ARK Electronics", "mpn": "ark-4in1-esc", "category": "drone", "subcategory": "escs", "summary": "US-made 3-8S 50 A/motor 4-in-1 ESC on open ARK32/AM32 firmware; Blue UAS Framework listed.", "origin": "US", "origin_basis": "made", "price_usd": 218.5, "price_qty": 1, "ndaa": "compliant", "blue_uas": "listed", "image": "https://parts.trymaglev.com/img/dr-ark-4in1-esc.webp", "url": "https://parts.trymaglev.com/p/dr-ark-4in1-esc/", "json": "https://parts.trymaglev.com/api/parts/dr-ark-4in1-esc.json" }, { "id": "dr-holybro-tekko32-f4-50a", "name": "Holybro Tekko32 F4 4in1 50A ESC (AM32)", "brand": "Holybro", "mpn": "31102", "category": "drone", "subcategory": "escs", "summary": "Low-cost 4-6S 50 A 4-in-1 FPV/multirotor ESC on AM32 firmware, 30.5 mm mount.", "origin": null, "origin_basis": "unknown", "price_usd": 62.99, "price_qty": 1, "ndaa": "unknown", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-holybro-tekko32-f4-50a.webp", "url": "https://parts.trymaglev.com/p/dr-holybro-tekko32-f4-50a/", "json": "https://parts.trymaglev.com/api/parts/dr-holybro-tekko32-f4-50a.json" } ], "pairs_with_detail": [ { "id": "dr-speedybee-f405-v4-stack", "name": "SpeedyBee F405 V4 BLS 55A 30x30 FC & ESC Stack", "brand": "SpeedyBee", "mpn": "SB-F4V4-55-STACK", "category": "drone", "subcategory": "flight-controllers", "summary": "Very common low-cost Betaflight FPV stack (F405 FC + 55 A BLHeli_S 4-in-1); now marked discontinued by the maker.", "origin": "CN", "origin_basis": "hq", "price_usd": 65.99, "price_qty": 1, "ndaa": "non-compliant", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-speedybee-f405-v4-stack.webp", "url": "https://parts.trymaglev.com/p/dr-speedybee-f405-v4-stack/", "json": "https://parts.trymaglev.com/api/parts/dr-speedybee-f405-v4-stack.json" }, { "id": "dr-iflight-xing2-2207-1855kv", "name": "iFlight XING2 2207 1855KV FPV Motor", "brand": "iFlight", "mpn": "unknown", "category": "drone", "subcategory": "motors", "summary": "Popular 6S 5-inch FPV motor; low-cost China-made baseline for FPV builds.", "origin": "CN", "origin_basis": "hq", "price_usd": 20.99, "price_qty": 1, "ndaa": "unknown", "blue_uas": "not-listed", "image": "https://parts.trymaglev.com/img/dr-iflight-xing2-2207-1855kv.webp", "url": "https://parts.trymaglev.com/p/dr-iflight-xing2-2207-1855kv/", "json": "https://parts.trymaglev.com/api/parts/dr-iflight-xing2-2207-1855kv.json" } ] }