EM-3 TTL Smart Servo Motor
- High-Performance Smart Servo Motor – The EM-3 TTL Smart Servo Motor delivers up to 3kg stall torque, making it suitable for robotics, automation, educational projects, and lightweight robotic joints.
- Compact & Lightweight Design – Measuring just 28.5 × 12 × 20mm and weighing only 9g, the EM-3 is ideal for applications where space and weight are critical.
- Reliable Cored DC Motor – Equipped with a high-quality cored motor that provides smooth operation, dependable performance, and efficient power consumption.
- Fast Operating Speed – Offers a no-load speed of 120 RPM, enabling responsive and accurate movement for robotic mechanisms and servo-controlled systems.
- TTL Communication Interface – Features a TTL serial communication interface for easy integration with compatible servo controllers, microcontrollers, and robotic platforms.
- 8V Operating Voltage – Designed to operate at 8V input voltage, providing stable performance and compatibility with various robotic power systems.
- Low Power Consumption – Draws a maximum stall current of 1A, helping maintain efficient system power management while delivering reliable torque.
- Ideal for Robotic Applications – Suitable for robotic arms, quadruped robots, pan-tilt mechanisms, educational robots, automation equipment, and custom mechatronics projects.
- Easy System Integration – Compact dimensions and TTL connectivity simplify installation into new designs or replacement in existing robotic assemblies.
- Built for Precision Motion Control – Designed to provide consistent torque, smooth motion, and accurate positioning for applications requiring dependable servo performance.
- Trusted dealerDirect manufacturer partnership
- Pan-India deliveryInsured shipping, all states
- Post-sale supportTraining + service included
What makes it work
Energize Lab · Genuine EM Series
EM-3 TTL Smart Servo Motor
The EM-3 TTL Smart Servo Motor is a genuine Energize Lab component servo — the same EM-series class of smart servo used to move the head, body, and limbs of Energize Lab’s own Eilik companion robot.
9g Ultra-Compact
TTL Serial Control
120 RPM No-Load
Proven in Eilik
Full Specifications
| Specification | Details |
|---|---|
| Product | EM-3 TTL Smart Servo Motor — genuine Energize Lab hardware, part of the EM Series, “EM-3” clearly molded into the housing |
| Product Category | Smart Servo Motor / Robotics Actuator Component |
| Stall Torque | 3kg (at rated 8V input) |
| No-Load Speed | 120 RPM |
| Stall Current | 1A maximum |
| Motor Type | Cored DC motor |
| xBoom SKU | xboom-146141 |
| Specification | Details |
|---|---|
| Communication | TTL serial connection, for integration with compatible servo controllers and microcontrollers |
| Input Voltage | 8V |
| Dimensions | 28.5 × 12 × 20mm |
| Weight | 9g |
| Series | Energize Lab EM Series (also includes the EM-2 and EM-10 for smaller/larger torque needs) |
| Manufacturer | Energize Lab (Shenzhen Zhuneng Technology Co., Ltd.) — also the creator of the Eilik companion robot |
A Smart Servo Proven Inside a Real Robot
EM-3 TTL Smart Servo Motor: Genuine Energize Lab Hardware
This is a genuine Energize Lab servo — “EM-3” is molded directly into the housing, and it belongs to Energize Lab’s own EM Series lineup (alongside the smaller EM-2 and larger EM-10). Energize Lab isn’t just a components brand: it’s the same company behind Eilik, the widely-known desktop companion robot, and this exact EM-series servo class is what drives Eilik’s expressive head, body, and limb movements.
At just 9g and 28.5 × 12 × 20mm, the EM-3 packs 3kg of stall torque and a 120 RPM no-load speed into a footprint small enough for compact robotic joints, pan-tilt mechanisms, and lightweight robotic arms. TTL serial control means it talks to a servo controller or microcontroller over a simple serial link rather than requiring a dedicated PWM channel per servo — practical when you’re wiring up several joints in a small robot. Because this is the same servo class proven in a mass-produced consumer robot, you’re not just getting a spec sheet — you’re getting a component with a genuine track record.
3kg Torque, 9g Weight
A strong power-to-weight ratio for compact robotic joints.
TTL Serial Control
Simple integration with compatible controllers and MCUs.
Proven in Eilik
The same EM-series class powering a real companion robot.
Compact Footprint
28.5 × 12 × 20mm fits tight robotic assemblies.
See Every Detail
What It Is, and Where It Goes
The EM-3 is a smart servo motor — a self-contained rotary actuator with its own control electronics, built to be a joint or motion point inside a larger robotic assembly, not a standalone product on its own.
🤖 Robotics Actuator
🧩 Robot Joint Component
🎓 Educational Robotics Part
🔗 TTL Bus Servo
Robot Head & Neck Joints
Pan/tilt head movement, exactly as used in Eilik.
Small Robotic Arms
Elbow and wrist joints for lightweight arm builds.
Quadruped Leg Joints
Hip, knee, and ankle actuation in small-scale walkers.
Pan-Tilt Camera Mounts
Smooth, precise aiming for small onboard cameras.
Grippers & Claws
Compact gripping mechanisms for small manipulators.
Educational Robot Kits
An approachable servo for STEM and hobbyist builds.
Not Just a Spec Sheet — A Servo With a Track Record
The EM Series is the same servo line Energize Lab uses inside Eilik, its own mass-produced desktop companion robot — including a demonstrated overload-clutch mechanism that protects the EM-3 specifically from damage if its joint is blocked or over-torqued. When a servo has already survived contact with thousands of consumer units in daily use, that’s a meaningfully different confidence level than an unproven component.
Built for Compact, Reliable Robotic Motion
The EM-3 TTL Smart Servo Motor brings genuine, field-proven performance to your robotics build.
💪
3kg Stall Torque
Strong enough for real robotic joints, not just toys.
⚖️
9g, 28.5×12×20mm
Small enough for compact, weight-sensitive assemblies.
🔌
TTL Serial Interface
Simple wiring for multi-servo robotic control buses.
🌀
120 RPM No-Load
Responsive, accurate movement for servo-driven mechanisms.
⚡
1A Max Stall Current
Modest power draw keeps small robot builds efficient.
🤖
Field-Proven in Eilik
The same servo class used in a real consumer robot.
Built for Robotics Builders and Makers
The EM-3 TTL Smart Servo Motor suits builders who need a compact, dependable servo with a genuine track record.
Educational Robotics
An approachable, well-documented servo for STEM projects.
Companion & Social Robots
The exact servo class used in a mass-produced desktop robot.
Small Robotic Arms
Compact torque for lightweight arm and gripper joints.
Quadruped & Walker Robots
Leg-joint actuation for small-scale walking robots.
Custom Mechatronics Projects
A dependable building block for original robot designs.
Prototyping & Research
A proven, well-specified actuator for early-stage builds.
See This Servo Class Powering a Real Robot
All three videos are from Energize Lab’s own official channel, showing the EM-series servo — and the overload-clutch protection built into the EM-3 specifically — at work inside Eilik.
Frequently Asked Questions
What type of product is the EM-3 TTL Smart Servo Motor?
Where is this exact servo class actually used?
What does “TTL” mean for this servo’s control?
Is this suitable for a robotic arm or gripper?
What voltage does it need?
Are there other sizes in this servo family?
The full sheet
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