The EC series connectors are high-current, bullet-style connectors designed for safe, reliable, and low-resistance DC connections. The numbers (3, 5, 8) refer roughly to the diameter of the male bullet pin in millimeters, which correlates with the current handling capability.
Key Features Across EC Series:
- Current Rating:
| Connector | Pin Diameter | Typical Current Rating |
| EC3 | 3 mm | 60A continuous |
| EC5 | 5 mm | 120A continuous |
| EC8 | 8 mm | 200A continuous |
- Voltage Rating:
- Usually up to 500V DC, depending on insulation and application.
- Polarity and Safety:
- Polarized housings prevent reverse connection.
- Snug fit ensures low resistance and stable connection.
- High-temperature nylon housings are heat-resistant for soldering or high-current applications.
- Design Features:
- Male and female bullet pins ensure minimal contact resistance.
- Designed for solder or crimp connections to wires.
- Can withstand high vibration, making them reliable in mobile applications.
Typical Applications
- EC3 Connector (3 mm pin, 60A)
- RC Hobby Applications:
- Electric RC cars, boats, and planes.
- Small Drone Batteries:
- Lithium Polymer (LiPo) battery connections.
- Low-to-medium current EV modules:
- Small e-bikes, scooters, or battery packs.
- Solar DIY Projects:
- Small DC connections where currents ≤60A are sufficient.
- EC5 Connector (5 mm pin, 120A)
- Larger RC and Drone Models:
- High-performance electric planes and racing drones.
- Electric Vehicles:
- Medium-current battery packs (e-bikes, golf carts, mobility scooters).
- Battery Packs for DIY Powerwalls:
- Li-ion battery modules requiring 100–120A connections.
- High-current Solar Systems:
- Battery banks in off-grid or RV solar systems.
- EC8 Connector (8 mm pin, 200A)
- High-Power EVs and Industrial Batteries:
- Electric motorcycles, ATVs, or small EVs.
- Large Battery Banks & Energy Storage Systems:
- High-current modules for solar or UPS systems.
- RC Competition Models:
- Very high-power RC boats or airplanes.
- Heavy-duty DC Systems:
- Robotics, industrial machines needing 200A connections.
Advantages of EC Connectors
- High Current Handling with minimal voltage drop.
- Polarized & Secure: prevents reverse connection.
- Compact Design: saves space in battery packs.
- Reliable Under Vibration: excellent for vehicles, drones, and RC models.
- Scalable: EC3 → EC5 → EC8 for higher current requirements.
