DYS Waterproof 45kg 8.4V Brushless Digital Servo (IP67)

A 45 kg·cm digital servo driven by a brushless motor, with a full metal gear train in a CNC aluminium alloy case sealed to IP67. A brushless motor runs cooler and lasts longer than brushed or coreless servo motors under continuous load, which suits drone payload-release mechanisms, large fixed-wing control surfaces, robotic joints and heavy RC steering. Available in 180° and 270° travel versions.

Key features

• Stall torque of 34 kg·cm at 6 V, 41 kg·cm at 7.4 V and 45 kg·cm at 8.4 V
• Fast transit: 0.08 s per 60° at 8.4 V
• Full metal gears on two ball bearings
• IP67-sealed aluminium case for mud, rain and dusty field work
• PWM control over a 500–2500 µs pulse range with a 1 µs dead band

Specifications

• Operating voltage: 6–8.4 V
• Stall torque: 34 / 41 / 45 kg·cm at 6 / 7.4 / 8.4 V
• Speed: 0.12 / 0.09 / 0.08 s per 60° at 6 / 7.4 / 8.4 V
• Idle current: 300 / 320 / 350 mA at 6 / 7.4 / 8.4 V
• Running current: 4.5 / 5.5 / 6.8 A at 6 / 7.4 / 8.4 V
• Travel: 180° or 270° (by variant)
• Motor: Brushless
• Gears: Full metal, 2 ball bearings
• Case: CNC aluminium alloy
• Ingress protection: IP67
• Dimensions: 40 x 20 x 40.5 mm
• Weight: 78 g (without horn)
• Lead: 300 mm, 22AWG (brown negative, red positive, yellow signal)
• Operating temperature: -20 to +60 °C

Running current reaches 6.8 A at 8.4 V, so feed it from a 2S LiPo (8.4 V fully charged) or a high-current 6–8.4 V BEC rather than a receiver or flight-controller rail, which at 5 V is also below its 6 V minimum. Only the signal wire needs to come from the receiver or flight controller.