Spedix BLS 100A AM32 3-8S 30x30 4-in-1 ESC

The Spedix BLS 100A is a 4-in-1 ESC running AM32 firmware for heavy multirotor builds on 3S to 8S LiPo — 7- to 10-inch long-range quads, cinelifters and X-class frames. Each of the four channels is rated for 100A continuous with 110A burst for 10 seconds, and the board mounts on a 30.5 × 30.5 mm pattern.

Key features

• STM32G071 MCU driving high-performance MOSFETs
• DShot300 and DShot600 support, with ESC telemetry back to the flight controller
• Onboard current sensor (scale 200) for current and mAh readings on the OSD
• Open-source AM32 firmware, configurable and updatable through the flight controller
• Supplied with capacitors and the main power lead

Specifications

• Firmware: AM32
• MCU: STM32G071
• Input: 3–8S LiPo (11.1–29.6V nominal)
• Continuous current: 100A × 4
• Burst current: 110A for 10 seconds
• Protocols: DShot300, DShot600
• Telemetry: ESC telemetry supported
• Current sensor scale: 200
• Mounting: 30.5 × 30.5 mm, 4 mm holes
• Dimensions: 57 × 56 × 7 mm
• Weight: 28 g (board only)

At 57 × 56 mm the board is larger than most 30.5 mm stack components, so check the room between your frame plates. On 7S or 8S, pick a flight controller rated for that voltage or feed it from a separate BEC.