SEQURE Blueson A1 8S 70A AM32 4-in-1 ESC

The SEQURE Blueson A1 is a compact 4-in-1 ESC built around a 32-bit AT32F421 processor running AM32 or BLHeli_32 firmware, rated for 70A continuous per motor on 8S packs (65A on 6S) — suited to X-Class rigs, cinelifters and heavy-payload long-range quads.

Key features

• 32-bit AT32F421 processor with dynamic PWM switching from 8kHz to 128kHz for precise, low-noise throttle response.
• Wide 2–8S LiPo/LiHV input: 70A continuous (150A peak) per motor on 8S, 65A continuous (120A peak) on 6S.
• Full DShot600/300/150, bidirectional DShot, Oneshot, Multishot and PWM protocol support, with ESC telemetry returned to the flight controller.
• Compact 20x20mm mounting pattern (M3, 4mm grommet holes) keeps the board small despite the high current rating.
• Generous solder pads simplify wiring, and the board ships with matched 8-pin JST-SH signal cables and 12AWG power leads.

Specifications

• Processor: AT32F421 (32-bit)
• Firmware: AM32 or BLHeli_32
• Continuous current: 70A x4 (8S) / 65A x4 (6S)
• Peak current: 150A x4 (8S) / 120A x4 (6S)
• Input voltage: 2–8S LiPo/LiHV
• Mounting pattern: 20x20mm, M3
• Dimensions: 42.5 x 36 x 7 mm
• Weight: 19 g

No onboard BEC, so pair it with a flight controller or separate regulator that supplies 5V for the receiver and peripherals.