Choosing the right power connectors is essential to ensure the safe and efficient operation of your computers and other electrical equipment. But shopping for the right ones for your needs can be confusing, since power connectors come in many types and styles.

Below we clarify some of the main terminology you’ll encounter while shopping for power distribution connectors for your electrical components, including the most popular sizes, types of mounts, and useful features.

AC Connector Sizes

When it comes to AC power connectors, the "C" designations (like C20, C14, etc.) follow the IEC 60320 standard. This international standard defines various types of connectors based on their physical shape, current rating, and voltage rating. Each type has specific applications in different power setups. Let’s look at some of the most common classifications:

  • C20 Connector: This is a high-current connector rated for up to 10A to 16A at 250V. It is typically used in high-power devices like servers, data center equipment, and industrial machinery.
  • C19 Connector: This is the female counterpart to the C20 and is also rated for up to 10A to 16A at 250V. You’ll often find it used in data centers and large-scale networking setups.
  • C18 Connector: This is a non-grounded version used for double-insulated equipment, rated for 10A. It is ideal for smaller, ungrounded electrical devices.
  • C16 Connector and C15 Connector: These are designed for high-temperature applications (up to 70°C to 120°C) and are commonly found in equipment like electric kettles and network switches that run hot.
  • C14 Connector and C13 Connector: The most common IEC 60320 connectors, these are rated for 10A and 250V. They are widely used for computers, monitors, and various home appliances.
  • IEC 60320 Connectors: These provide standardized solutions for many devices, ensuring global compatibility and safety.

Mounts for AC Power Connectors

Different mounting options are available for AC electrical connectors, each offering distinct advantages based on the application. Here are the common types:

  • In-line Mount: These connectors are installed directly onto a cable, allowing for easy, flexible connections. They are commonly used when devices need to be plugged in or disconnected frequently.
  • Snap-In Mount: Quick and easy to install, these connectors snap securely into place with no tools required.
  • Panel Mount: These are fixed to a surface, such as an equipment panel, providing a sturdy and secure connection point. They are ideal for installations where the connector will not be moved.
  • Flange Mount: These include various subtypes, such as:
    • Screw-in Flange Mount: These are fixed using screws, providing a more permanent connection, which is ideal for rugged or high-vibration environments.
    • Side-Fixing and Top-Fixing Flange Mount: These variations provide different mounting orientations, offering flexibility for installation in tight or custom spaces.
    • Flange Mount with Through-Hole PCB Terminations: These connectors are designed to be soldered directly to a printed circuit board (PCB) for a stable and reliable connection.

AC Connector Useful Features

When choosing AC power connectors, look for additional features that may enhance performance or safety:

  • Fuse Holders: Some connectors come with built-in slots for one or two fuses, offering extra protection against overcurrent.
  • EMI Filtration: An EMI filtered AC connector reduces electromagnetic interference in sensitive electrical equipment.
  • Lighted On-Off Switches: These are helpful for easy operation and visual confirmation that the device is powered on or off.
  • UL94V-0 Flammability Rating: This rating indicates that the material is highly resistant to fire, enhancing the safety of your equipment.
  • High-Strength Materials: Connectors made from durable materials like Nylon 66 offer superior electrical insulation and resistance to heat and chemicals.
  • Right-Angle and Down-Angle Locking Connectors: Locking AC connectors have a more secure connection, preventing accidental disconnects. They are especially useful in industrial settings where vibration is common.

DC Connector Sizes

DC electrical connectors come in a variety of sizes, each suited for different applications based on their inner diameter (ID) and outer diameter (OD):

  • 0.7mm ID, 2.35mm OD: Used in small electronic devices like handheld gadgets or low-power chargers.
  • 1.0mm ID, 3.8mm OD: Common in small appliances and low-voltage equipment.
  • 1.3mm ID, 3.5mm OD: Suitable for compact electronics, such as audio-visual devices.
  • 2.1mm ID, 5.5mm OD: One of the most popular sizes for consumer electronics, including routers and external hard drives.
  • 2.5mm ID, 5.5mm OD: Used for slightly higher current requirements, often found in LED lighting and CCTV cameras.
  • 3.0mm ID, 6.0mm OD: Frequently used in higher-powered devices such as medical equipment.
  • 3.0mm ID, 6.3mm OD: This size is typically used for industrial and heavy-duty power connections.

DC Connector Mounts

DC connectors also come in different mounting styles, each suited to specific applications:

  • Female Chassis-Mount: These connectors are mounted to a device's chassis, providing a secure and stable connection point for plugging in a male DC connector. They are ideal for stationary equipment.
  • Solder-Mount: These connectors are soldered directly to wires, providing a permanent and reliable connection. They are often used in manufacturing and DIY projects.

DC Connector Useful Features

When selecting DC power connectors, consider these useful features:

  • Field-Terminated Connectors with Screw Terminals: These connectors are easy to install and are perfect for field installations or situations where connections need to be made or modified on-site.
  • Right-Angle Connectors: Right-angle DC connectors fit in tight spaces, making them ideal for compact or space-constrained applications.

Since AC and DC power connectors come in so many sizes and styles, it pays to start your shopping armed with some basic information about them. It also helps to have a one-stop source like ShowMeCables, with a big enough selection that you can be sure to find the exact power connectors for your needs. And remember, our connectors are in stock and available with FREE standard same-day shipping if ordered before 5 p.m. EST.