Hitec D840WP Mega Scale WP Servo

Hitec D840WP Mega Scale WP Servo

The Hitec D840WP is a premium, high-performance waterproof digital servo from Hitec's advanced D-Series range. Designed for demanding large-scale RC applications, it combines exceptional torque, lightning-fast response, and outstanding durability, making it an excellent choice for steering and throttle/brake duties.

Powered by a 32-bit MCU and 12-bit ADC, the D840WP delivers ultra-smooth, high-resolution control with faster response times than traditional digital servos. Operating across an impressive 3.5V - 8.4V voltage range, it is compatible with virtually all common receiver battery types without requiring voltage regulators or adapters.

Built to withstand tough conditions, the servo features hardened steel gears, dual ball bearings, a centre aluminium heatsink for efficient motor cooling, and a water and dust-resistant construction. It also includes Hitec's heavy-duty 15-tooth output spline with a secure 3mm servo horn screw for maximum reliability under high loads.

Ideal for large-scale RC cars, boats, aircraft, UAVs and robotics, the D840WP offers the perfect balance of performance, precision and long-term durability.

Features

• High-performance waterproof digital servo
• Advanced 32-bit MCU with 12-bit ADC for ultra-fast response
• Smooth, high-resolution positioning
• Wide operating voltage: 3.5V - 8.4V
• Programmable digital amplifier (requires Hitec DPC-11 Programmer)
• Hardened steel gear train
• Dual ball bearings for increased durability
• Centre aluminium heatsink for improved cooling
• Heavy-duty 15-tooth output spline with 3mm fixing screw
• Suitable for large-scale RC vehicles, boats, aircraft, UAVs and robotics

Performance

Specifications

• Dimensions: 66 × 32 × 62mm (46mm height below mounting tabs)
• Weight: 227g
• Operating Voltage: 3.5V - 8.4V
• Output Spline: 15 Tooth HD
• Gear Material: Steel
• Bearings: Dual Ball Bearings
• Water & Dust Resistant: Yes

Compatibility

Direct Fit

• KM X2 - Throttle/Brake
• Losi 5ive-T - Throttle/Brake
• Losi 5ive-B - Steering
• Losi 5ive-B - Dual Steering Servo Setup
• Losi 5ive-B - Throttle/Brake
• FID Dragon Hammer - Throttle/Brake

Fits with 3mm Spacers

• KM X2 Steering
• Losi 5ive-T Steering
• FID Dragon Hammer Steering

Compatibility Notes:

• GR048 - Yes
• X51031 - Throttle/Brake Yes | Steering Yes (3mm spacer required)
• FID002 - Yes
• FID035 - Yes (light sanding of servo tray recommended)
• Fast325B - Yes
• LUS041 - Yes
• B042-1 - No
• FIDXL018 - No (may fit with modification)
• FID035D - No (may fit with modification)

Box Contents

• Hitec D840WP Servo
• 39.9mm Round Servo Horn
• 46mm Single Arm Horn
• 55mm Aluminium Double Arm Horn
• 61mm Four-Point Horn
• Rubber Grommets
• Brass Eyelets
• Mounting Screws
• 3mm Servo Horn Screw

Colour: Blue

Position: Front

Compatible with: HPI Baja 5B, KM Buggy, Rovan Buggy, KM Blade, Q-Baja, KM T1000, HPI Baja 5T, HPI Baja 5SC, Losi 5ive-T, TLR 5ive-B,Losi Mini WRC,King Motor X2,30 Degree North Truck,30 Degree North Buggy,FID Dragon Hammer,FID Dragon Hammer V2,MCD RR5,MCD W5,VEKTA.5,VEKTA.5TT,