What Is a Power Distribution Unit (PDU)?
A Power Distribution Unit (PDU) is electrical equipment that receives power from an upstream source and distributes it safely to multiple downstream loads through protected branch circuits.
In mission-critical environments, Power Distribution Units are used to distribute conditioned power to servers, cabinets, process equipment, and critical branch circuits while supporting protection, monitoring, and service access.
A LayerZero® Power Distribution Unit receives power from an upstream source and distributes it to critical downstream loads through monitored and protected branch circuits.
How Does a Power Distribution Unit Work?
A PDU receives incoming power from equipment such as a Static Transfer Switch, UPS, or utility-fed source and distributes that power through multiple protected branch circuits.
Depending on system design, a Power Distribution Unit may include:
- Main input protection
- Branch circuit breakers
- Integrated monitoring
- Transformer sections where required
- Maintenance access for safe service
Unlike rack-mounted plug-strip PDUs, LayerZero Power Distribution Units are engineered as mission-critical electrical distribution equipment for larger downstream power architectures.
Where Are PDUs Used?
Power Distribution Units are commonly used in:
- Data centers
- AI infrastructure
- Semiconductor manufacturing
- Telecommunications facilities
- High-availability industrial operations
What Makes LayerZero PDUs Different?
LayerZero® Power Distribution Units are engineered for applications where uptime, serviceability, and electrical reliability are critical.
- Front-only service access
- Flexible branch circuit layouts
- Dead-front safety design
- Integrated touchscreen monitoring options
- INSIGHT IR® thermal monitoring available
PDU vs Remote Power Panel (RPP)
| Feature | PDU | RPP |
|---|---|---|
| Main Purpose | Primary power distribution | Secondary branch circuit distribution |
| Transformer | May include transformer | Typically no transformer |
| Installed Near | Upstream distribution point | Closer to downstream loads |
How Do You Select the Right PDU?
- Voltage requirements
- Branch circuit quantity
- Fault current characteristics
- Monitoring requirements
- Future expansion needs
Common Questions About PDUs
What does PDU stand for?
PDU stands for Power Distribution Unit.
Is a PDU used in a data center?
Yes. PDUs distribute power throughout data center environments and support critical IT loads.
What is the difference between a PDU and an RPP?
A PDU usually serves as the primary distribution point, while an RPP extends branch circuit distribution closer to end equipment.
Can a PDU include monitoring?
Yes. Many LayerZero PDUs include monitoring and optional advanced thermal visibility.