IEC C13 vs C19 Outlets in High-Density Racks
Choosing outlet types for AI compute racks drawing 10A/16A per node without derating.
C13 and C19 are the two dominant IEC 60320 outlet types in data center PDUs. Choosing the right mix — and specifying locking variants — keeps high-density racks safe and free of accidental downtime.
C13 vs C19: the basics
C13 outlets pair with C14 plugs and are rated to 10A — the standard for servers, switches and most 1U/2U equipment. C19 outlets pair with C20 plugs and are rated to 16A, used by high-draw servers, blade chassis, and GPU nodes.
Getting the mix right
In high-density racks, count how many devices need 16A C19 feeds versus 10A C13, then specify a hybrid PDU that provides both without wasting outlets. Yiestar routinely builds vertical PDUs such as 36×C13 + 6×C19 on a single chassis.
Don't skip locking outlets
In dense cabinets, a bumped cord can drop a production node. IEC-Lockable C13/C19 outlets grip the plug mechanically so cords can't vibrate or be pulled loose — cheap insurance against accidental downtime.
