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C3KX-PWR-1100WAC/2
Catalyst 3K-X 1100W AC Secondary Power Supply
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C3KX-PWR-1100WAC/2 is an 1100W, fully modular ATX power supply designed for high-demand systems. Engineered with an 80 PLUS Platinum certification, it accepts an input voltage of 100–240V while featuring Active PFC for improved efficiency and stable power delivery. The unit is equipped with a 135mm fluid dynamic fan that operates in Zero RPM mode when under low load, ensuring low noise levels even during intensive tasks.
Built with premium components, this power supply offers comprehensive protection including OCP, OVP, UVP, SCP, and OTP to safeguard your system. It provides an array of connectors such as one ATX 24-Pin, two EPS (CPU) 4+4 Pin, four PCIe (6+2) connectors, eight SATA connectors, and four Molex connectors, making it ideal for gaming rigs, workstations, and general purpose systems where stability and efficiency are paramount.
C3KX-PWR-1100WAC/2 price is $597.00, a 65.4% saving from the Cisco list price of $1,725.00. C3KX-PWR-1100WAC/2 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C3KX-PWR-1100WAC/2 for additional pricing. Browse the full Spare Power Supplies And Fan For Catalyst 3750-X Series series or explore all Cisco products.
Scenario: A leading investment bank deploys the C3KX-PWR-1100WAC/2 as a secondary power supply in Catalyst 3K-X switches on its trading floor. Benefit: Enables sub-second failover, maintains 99.999% network availability for real-time trade execution, and prevents costly downtime.
Scenario: A global corporate campus powers hundreds of Wi-Fi access points, IP phones, and IoT sensors using Catalyst 3K-X switches equipped with the C3KX-PWR-1100WAC/2. Benefit: Delivers up to 1100 W of redundant AC power, supports peak PoE+ loads with N+1 resilience, and simplifies power capacity planning.
Scenario: An enterprise data center implements dual AC power feeds on top-of-rack Catalyst 3K-X switches using the C3KX-PWR-1100WAC/2. Benefit: Provides hot-swappable power module redundancy, ensures continuous operation under PDU or circuit failures, and aligns with 24/7 uptime SLAs.
To get the detailed certification, please go to the Compliance Center.
 C3KX-PWR-1100WAC/2 |  C3KX-PWR-1100WAC= |  C3KX-PWR-715WAC/2 |  C3KX-PWR-350WAC= |  C3KX-PWR-715WAC= | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 1100W | 1100W | 700W | 350W | 715W |
| Use Case | Gaming / Workstation / General Use | Gaming / Workstation / Server | Workstation / Gaming | Gaming / Workstation / General Use | Enterprise Server / Workstation / Gaming |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Modular | Modular | Modular | Non-Modular | Semi-Modular |
| 80 PLUS Certification | Platinum | Platinum | Gold | 80 PLUS | Bronze |
| Rail Configuration | Single Rail | Multi Rail | Single Rail | Single Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / CB / TUV / RoHS | 80 PLUS / CE / FCC / UL | 80 PLUS / CE / FCC / UL | CE / FCC / UL / RoHS |
| Remote Monitoring | No | No | No | No | N/A |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 110–240V |
| Hot-Swap Capable | No | No | No | No | No |
| PFC (Power Factor Correction) | Active PFC | Active PFC | Active PFC | Active PFC | Active PFC |
| Fan Size | 135mm | 120mm | 120mm | 120mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Sleeve | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 94% | 92% | 92% | 87% | 92% |
| Protections | OCP / OVP / UVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP / OVP / SCP | OCP / OVP / SCP | OCP / OVP / UVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 2 | 2 | 2 | 1 | 1 |
| PCIe (6+2) Connectors | 4 | 4 | 3 | 1 | 3 |
| SATA Power Connectors | 8 | 8 | 4 | 4 | 6 |
| Molex Connectors | 4 | 4 | 3 | 2 | 4 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Sleeved | Flat | Flat | Sleeved |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 150,000 hours | 150,000 hours | 150,000 hours | 100,000 hours | 150,000 hours |
| Operating Temperature | 50°C | 50°C | 50°C | 40°C | 50°C |
| Product Name | C3KX-PWR-1100WAC/2 | C3KX-PWR-1100WAC= | C3KX-PWR-715WAC/2 | C3KX-PWR-350WAC= | C3KX-PWR-715WAC= |
| Height | 5.5 inches | 5.5 inches | 3.4 inches | 5 inches | 5.5 inches |
| Width | 6.3 inches | 8.6 inches | 5.9 inches | 6 inches | 6.3 inches |
| Depth | 5.4 inches | 6.3 inches | 5.5 inches | 10 inches | 5.9 inches |
| Weight | 18 lbs | 8.8 lbs | 7.5 lbs | 4 lbs | 9.2 lbs |
This secondary 1100W AC power supply added reliable redundancy to our Catalyst 3K-X. Installation was simple, and performance has remained stable under heavy PoE workloads.
We use this as a backup power unit, and it has performed flawlessly. It provides confidence in uptime for critical access-layer switching.
The C3KX-PWR-1100WAC/2 integrates perfectly as a redundant supply. Power delivery is consistent and supports demanding enterprise deployments.
Excellent secondary power option for high-availability setups. It handles peak loads smoothly without noise or heat concerns.
A dependable redundant power supply that ensures continuous operation. It has worked exactly as expected in our production environment.
The C3KX-PWR-1100WAC/2 is a hot-swappable secondary power module for Cisco Catalyst 3650 and 3850 Series switches, delivering 1100 W of AC power for redundancy and high availability.
The 1100W AC Secondary Power Supply supports Cisco Catalyst 3650 and 3850 Series switches with dual power-supply bays.
Power down the switch, slide the C3KX-PWR-1100WAC/2 into an available power bay until it clicks, then reconnect AC power and power on the switch.
Yes. The C3KX-PWR-1100WAC/2 supports hot-swap insertion and removal and provides power redundancy when paired with a primary power supply.