Cisco C3K-PWR-300WDC
Catalyst 3560E-12D and Catalyst 3560E-12SD 300WDC power supply
Product Highlights
Maintaining uninterrupted power in mission-critical network environments is non-negotiable — especially when your aggregation layer handles dense 10 Gigabit Ethernet traffic. The Cisco C3K-PWR-300WDC is a 300-watt DC power supply module purpose-built for the Cisco Catalyst 3560E-12D and Catalyst 3560E-12SD aggregation switches.
Designed for deployments where DC power infrastructure is standard — such as central offices, telecom facilities, and co-location environments — this power supply accepts a wide DC input range of -40 V to -72 V DC and delivers a stable 12 V output to the switch chassis. Its hot-swappable, plug-in module design allows field replacement or addition without taking the switch offline, protecting your network from costly downtime.
The Catalyst 3560E-12D and 3560E-12SD chassis support dual redundant power supplies that can be replaced one at a time without service interruption. Operators can even mix AC and DC modules (pairing this unit with the C3K-PWR-300WAC) for maximum power-source flexibility. Whether you are stocking a critical spare or building out a redundant power configuration, the C3K-PWR-300WDC delivers the reliability Cisco Catalyst infrastructure demands.
Note: The Cisco Catalyst 3560-E Series has reached End-of-Life status. This power supply is available as a replacement or spare unit for existing deployments.
Features & Benefits
DC Power Input for Telecom Environments
The C3K-PWR-300WDC accepts a -40 V to -72 V DC input range, making it the right choice for central-office and telecom deployments that rely on DC power plants. This eliminates the need for AC-to-DC conversion equipment, reducing complexity and potential points of failure in your power chain.
Hot-Swappable Redundancy
The Catalyst 3560E-12D and 3560E-12SD chassis support dual hot-swappable power supplies. You can replace a failed unit or install a second PSU for redundancy without interrupting network services. This architecture is critical for environments where even brief outages carry significant operational or financial cost.
Flexible AC/DC Mixed Configurations
Cisco allows you to mix AC and DC power supply modules within the same Catalyst 3560E chassis. Pair the C3K-PWR-300WDC with a C3K-PWR-300WAC to create a mixed-power redundancy setup — ideal for facilities transitioning between power infrastructures or requiring diverse power source resilience.
Consistent 300W Power Delivery
With a 300-watt output capacity at 12 V, this power supply is matched precisely to the power requirements of the Catalyst 3560E-12D and 3560E-12SD platforms. Reliable, right-sized power delivery means efficient operation without over-provisioning.
Deployment Scenarios
Telecom Central Office Aggregation
Central offices and telecom facilities typically run on -48 V DC power plants. The C3K-PWR-300WDC integrates directly into this infrastructure, powering Catalyst 3560E-12D/12SD aggregation switches without requiring external AC conversion. This simplifies the power architecture and improves overall reliability.
Redundant Power Spare for Existing Deployments
For organizations running Catalyst 3560E switches with a single power supply, adding the C3K-PWR-300WDC as a second module provides immediate failover protection. Keeping a tested spare on the shelf further reduces mean time to repair in the event of a PSU failure.
Co-Location and Data Center Edge
Co-location environments often provide DC power feeds to reduce conversion losses and improve efficiency. The C3K-PWR-300WDC allows Catalyst 3560E switches deployed at the data center edge or in meet-me rooms to connect directly to facility DC power, aligning with site power standards.
General
Electrical
Compatibility
Lifecycle
Compatibility Notes
Compatible Platforms
- Cisco Catalyst 3560E-12D (WS-C3560E-12D)
- Cisco Catalyst 3560E-12SD (WS-C3560E-12SD-E, WS-C3560E-12SD-S)
Power Configuration Notes
- The Catalyst 3560E-12D and 3560E-12SD support two power supply slots with hot-swap capability.
- AC and DC power supply modules can be mixed within the same chassis (e.g., one C3K-PWR-300WAC + one C3K-PWR-300WDC).
End-of-Life Notice
- The Cisco Catalyst 3560-E Series reached End-of-Sale on January 30, 2013. Cisco encourages migration to the Catalyst 9300 Series. This power supply is available as a replacement spare for existing installations.
Downloads & Resources
Frequently Asked Questions
| Part Number | Product | Key Difference |
|---|---|---|
| C3K-PWR-300WAC | Cisco 300W AC Power Supply for Catalyst 3560E | AC version (85–265 VAC input) of the same 300W PSU — choose based on your facility's power infrastructure. |
| C3K-PWR-750WAC | Cisco 750W AC Power Supply | Higher-wattage AC PSU for Catalyst 3750-E/3560-E platforms requiring PoE power budgets. |
| C3K-PWR-1150WAC | Cisco 1150W AC Power Supply | Maximum-capacity AC PSU for full 48-port PoE deployments on Catalyst 3750-E/3560-E chassis. |
| C3KX-PWR-440WDC | Cisco 440W DC Power Supply for Catalyst 3K-X | DC power supply for the newer Catalyst 3750-X/3560-X series — not compatible with 3560-E chassis. |