Hitec HS-5070MH Digital HV Ultra Torque Analog Feather
by HiTec

The Hitec HS-5070MH Digital HV Ultra Torque Metal Gear Feather Servo (Part #: 35070S / HRC35070S) is a high-voltage, programmable micro servo engineered for demanding small-scale RC aircraft, gliders, helicopters, and robotics applications. Driven by a 3-pole cored metal-brush neodymium magnet motor and Hitec's Generation 1 digital circuitry, the HS-5070MH delivers precise centering, high holding torque, and rapid transit speeds across a wide 3.5V to 8.4V operating envelope—allowing direct 2S LiPo power without an external voltage regulator.

Weighing just 12.7 grams (14.2 grams with full wire lead) in a compact 23.6 x 11.6 x 30.0 mm feather-class housing, this servo produces up to 52.8 oz-in (3.8 kgf-cm) of stall torque at 7.4V while cycling 60 degrees in 0.12 seconds. Its heavy-duty metal gear train and ball-bearing-supported output shaft withstand high flight loads and vibration in 42–48 inch 3D park flyers, DLG/2-meter sailplanes, 450-size electric helicopters, and micro UAV control surfaces. Using a Hitec digital servo programmer (such as the HFP-30 or DPC-20), builders can customize end points, rotation direction, dead band width, fail-safe positions, and transit speed.

Key Features

• High-Voltage 2S LiPo Direct Operation: Wide 3.5V–8.4V DC input range enables direct unregulated operation from 2-cell LiPo receiver packs as well as standard 4.8V–6.0V BEC rails.

• Ultra-High Micro Torque & Speed: Generates 43.1 oz-in (3.1 kgf-cm) at 0.15 sec/60° on 6.0V, stepping up to 52.8 oz-in (3.8 kgf-cm) at 0.12 sec/60° on 7.4V.

• Programmable Digital Circuitry: Generation 1 digital amplifier provides superior centering accuracy and holding power, with user-programmable EPA, direction, fail-safe, dead band, and speed parameters via Hitec DPC-20 or HFP-30 programmers.

• Rugged Metal Gear Train & Ball Bearing: Heavy-duty metal gears paired with a top ball-bearing output shaft resist stripping and mechanical slop under high aerodynamic loads.

• 3-Pole Neodymium Cored Motor: High-efficiency metal-brush neodymium magnet motor delivers responsive acceleration and consistent torque in a lightweight 12.7g feather footprint.

Technical Specifications

• Manufacturer Part Number / SKU: 35070S (HRC35070S)

• Servo Class / Size: Feather / Micro

• Circuit Type: Programmable G1 Digital

• Command Protocol: Standard PWM

• Operating Voltage Range: 3.5V – 8.4V DC (2S LiPo HV compatible; rated specs at 6.0V–7.4V)

• Stall Torque (6.0V): 43.1 oz-in (3.1 kgf-cm)

• Stall Torque (7.4V): 52.8 oz-in (3.8 kgf-cm)

• No-Load Speed (6.0V): 0.15 sec / 60°

• No-Load Speed (7.4V): 0.12 sec / 60°

• Idle Current Draw: 3 mA

• No-Load Operating Current: 200 mA – 240 mA

• Stall Current Draw: 1,000 mA – 1,300 mA

• Dead Band Width: 2 $\mu\text{s}$

• Motor Type: 3-Pole Cored Metal-Brush Neodymium Magnet

• Gear Train Material: Metal Gears (with Resin Primary Gear)

• Bearing Type: Top Ball Bearing

• Output Spline: Hitec Micro Spline

• Case Material: Engineering Plastic

• Wire Lead Gauge: 28 AWG / 20-Strand Universal 3-Pin Connector Lead

• Dimensions (L x W x H): 23.6 mm x 11.6 mm x 30.0 mm (0.93 in x 0.46 in x 1.18 in)

• Net Weight: 12.7 grams (0.45 oz) servo only / 14.2 grams (0.50 oz) with lead

What Is Included

• (1) Hitec HS-5070MH Digital HV Metal Gear Feather Servo (Part #: 35070S)

• (1) Assorted Composite Servo Horn / Arm Set

• (1) Set of Rubber Grommets, Brass Eyelets, and Mounting Screws