When dealing with servers, UPS systems, and power distribution units (PDUs), regular C13/C14 power cords are not enough. Instead, you’ll often encounter C19 and C20 IEC connectors — designed for high-power applications.
c19 vs c20 connector
If you’ve ever wondered what makes C19/C20 different and when to use them, this guide will give you a clear explanation.
1. What are C19 and C20 Connectors?
The IEC 60320 standard defines multiple connector types. Among them:
C19 (female socket)
Rectangular, with 3 flat horizontal contacts.
Receives power from a C20 plug.
C20 (male plug)
Rectangular, with 3 flat horizontal pins.
Inserts into a C19 socket.
👉 Pairing Rule:
Just like C13 plugs into C14, the C20 plug connects to a C19 socket.
2. Electrical Ratings
C19 and C20 are designed for higher current loads than C13/C14.
| Connector Type | Typical Rating | Voltage | Current |
|---|---|---|---|
| C13/C14 | Standard | 250V | 10A–15A |
| C19/C20 | High Power | 250V | 16A–20A |
💡 Key Point: If your equipment draws more than 15 amps, you’ll need a C19/C20 connection.
3. Common Applications
C19 and C20 connectors are widely used in enterprise environments:
Servers and Data Centers
High-performance rack servers often require C19 power cords.
Uninterruptible Power Supplies (UPS)
Backup power systems for critical infrastructure.
Power Distribution Units (PDUs)
Distribute electricity across multiple rack devices.
Networking Equipment
High-wattage switches and routers.
4. C19 vs C20: Physical Differences
| Feature | C19 (Female) | C20 (Male) |
|---|---|---|
| Gender | Socket (inlet) | Plug (outlet) |
| Connector Shape | Rectangular, 3 horizontal slots | Rectangular, 3 horizontal pins |
| Typical Use | Receives power from C20 plug | Inserts into C19 socket |
| Applications | Equipment input | Power source (UPS, PDU) |
5. Choosing the Right Cable
When selecting a C19 power cable:
Check Equipment Inlet:
If your device has a C20 inlet, you’ll need a C19 power cord.
Verify Current Rating:
Ensure the cable supports the required amperage (16A or 20A).
Select Proper Length & Gauge:
Longer cables may require thicker wires (lower AWG).
👉 Example: A C19 to C20 power cord is often used between a PDU and a server.
🔎 Conclusion
The C19 and C20 IEC connectors are designed for high-power applications where standard C13/C14 cords are insufficient.
C19 = socket (female), usually found on servers and equipment.
C20 = plug (male), usually found on PDUs and UPS units.
By choosing the correct C19/C20 power cable, you ensure safe, reliable power delivery for your critical infrastructure.
