E-Power HB7545GS 45KG Waterproof Steel Gear Digital Servo

A standard-size waterproof digital servo from E-Power with a brushless motor, metal gears and an aluminium case, sold in the 45 kg class for steering, winches, robot joints and drone payload release mechanisms. Choose the 180° or 270° control-angle version to suit your linkage travel.

Key features

• Stall torque of 34 kg·cm at 6.0 V and 41 kg·cm at 7.4 V
• Speed of 0.12 s/60° at 6.0 V and 0.09 s/60° at 7.4 V
• Brushless motor with MOS drive and a 1 µs dead band for precise centring
• Metal gears on dual ball bearings inside an aluminium case that helps shed heat
• Standard 40 × 20 × 40.5 mm body fits common servo mounts and trays

Specifications

• Operating voltage: 6.0–8.4 V
• Stall torque: 34 kg·cm @ 6.0 V, 41 kg·cm @ 7.4 V
• Speed: 0.12 s/60° @ 6.0 V, 0.09 s/60° @ 7.4 V
• Control: PWM, 1500 µs centre, 500–2500 µs pulse range
• Dead band: 1 µs
• Bearings: 2 ball bearings
• Control angle: 180° or 270° (by variant)
• Dimensions: 40 × 20 × 40.5 mm
• Weight: 78 g (without horn)
• Lead: 300 mm with JR plug
• Operating temperature: -20 °C to +60 °C

The 45 kg name is the class rating; the published torque figures stop at 7.4 V, though the servo is rated up to 8.4 V. Its 6.0 V minimum means it should run from a 2S pack or a 6–8.4 V BEC, not a 5 V receiver or flight-controller rail.