United States$5,000,000+
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Stuart Collins
5
This secondary 350W power supply adds redundancy and has integrated smoothly with our Catalyst 3K-X.
C3KX-PWR-350WAC/2
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Catalyst 3K-X 350W AC Secondary Power Supply
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Name:
C3KX-PWR-350WAC/2
- Description:
- Catalyst 3K-X 350W AC Secondary Power Supply
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Cisco
- GTIN:
- 34722662017
- Condition:
- Warranty:
- 3
- List Price:
$575.00
- Price:
$188.0067.3% off
Quantity:
1
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C3KX-PWR-350WAC/2 Overview
C3KX-PWR-350WAC/2 is a 350W ATX power supply featuring a non‑modular design and an 80 PLUS certification for reliable efficiency. Engineered with an input voltage range of 100–240V and active PFC, it incorporates an 80mm fan with a sleeve bearing that ensures effective cooling while maintaining low noise levels even under load.
Built with high‑quality components and robust protections including OCP, OVP, OTP, and SCP, this unit provides essential connectors such as a single ATX 24‑pin, one EPS (CPU) 4+4 pin, one PCIe (6+2) connector, four SATA power connectors, and two Molex connectors. Ideal for gaming rigs, workstations, and enterprise server applications, it boasts an efficiency rating of 85% and uses flat cables for a clean installation.
C3KX-PWR-350WAC/2 price is $188.00, a 67.3% saving from the Cisco list price of $575.00. C3KX-PWR-350WAC/2 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for C3KX-PWR-350WAC/2 for additional pricing. Browse the full Spare Power Supplies And Fan For Catalyst 3750-X Series series or explore all Cisco products.
C3KX-PWR-350WAC/2 Specifications
- Product Type
- Power Supply
- Wattage
- 350W
- Use Case
- Gaming / Workstation / Enterprise Server
- Form Factor
- ATX
- Modularity
- Non-Modular
- 80 PLUS Certification
- 80 PLUS
- Rail Configuration
- Single Rail
- Certifications
- CE / FCC / UL / RoHS
- Remote Monitoring
- No
- Input Voltage
- 100–240V
- Hot-Swap Capable
- No
- PFC (Power Factor Correction)
- Active PFC
- Fan Size
- 80mm
- Fan Bearing Type
- Sleeve
- Zero RPM Mode
- Yes
- Efficiency Rating
- 85%
- Protections
- OCP / OVP / OTP / SCP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 1
- PCIe (6+2) Connectors
- 1
- SATA Power Connectors
- 4
- Molex Connectors
- 2
- Floppy Connector
- No
- Cable Type
- Flat
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 100,000 hours
- Operating Temperature
- 40°C
- Product Name
- C3KX-PWR-350WAC/2
- Height
- 5.5 inches
- Width
- 5.9 inches
- Depth
- 6.3 inches
- Weight
- 4.6 lbs
C3KX-PWR-350WAC/2 Use Case
Data Center Core Switch Redundancy with C3KX-PWR-350WAC/2
In a mission-critical 24/7 data center hosting virtualization and cloud workloads, IT teams install the C3KX-PWR-350WAC/2 secondary power supply into Catalyst 3K-X core switches. Its hot-swappable design delivers automatic failover during maintenance or AC disturbance, ensuring zero downtime. Benefit: continuous service delivery, enhanced SLA compliance and reduced risk of costly outages.
Enterprise Campus Network High Availability for Voice & Wireless
In a large corporate campus supporting thousands of VoIP phones and wireless access points, network engineers deploy the C3KX-PWR-350WAC/2 as a redundant AC power supply in Catalyst 3K-X distribution switches. This setup enables non-disruptive upgrades and balanced load sharing across power modules. Benefit: flawless user experience, streamlined maintenance windows and minimized operational risk.
Remote Retail Branch Edge Resilience with Secondary Power Supply
In geographically dispersed retail outlets, edge Catalyst 3K-X switches are equipped with the C3KX-PWR-350WAC/2 350W AC secondary power supply to support POS terminals, inventory scanners and IP cameras. Its compact, high-efficiency design fits tight rack spaces and offers hot-swap redundancy. Benefit: guaranteed business continuity, simplified remote power management and minimized downtime.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| C3KX-PWR-350WAC/2 |  C3KX-PWR-1100WAC= |  C3KX-PWR-440WDC= |  C3KX-PWR-1100WAC/2 |  C3KX-PWR-350WAC= | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 350W | 1100W | 450W | 1100W | 350W |
| Use Case | Gaming / Workstation / Enterprise Server | Gaming / Workstation / Server | Gaming | Gaming / Workstation / General Use | Gaming / Workstation / General Use |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Modular | Non-Modular | Modular | Non-Modular |
| 80 PLUS Certification | 80 PLUS | Platinum | Bronze | Platinum | 80 PLUS |
| Rail Configuration | Single Rail | Multi Rail | Single Rail | Single Rail | Single Rail |
| Certifications | CE / FCC / UL / RoHS | 80 PLUS / CE / FCC / UL / CB / TUV / RoHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL |
| Remote Monitoring | No | No | No | No | No |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 100–240V |
| Hot-Swap Capable | No | No | No | No | No |
| PFC (Power Factor Correction) | Active PFC | Active PFC | Active PFC | Active PFC | Active PFC |
| Fan Size | 80mm | 120mm | 120mm | 135mm | 120mm |
| Fan Bearing Type | Sleeve | Fluid Dynamic | Sleeve | Fluid Dynamic | Sleeve |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 85% | 92% | 87% | 94% | 87% |
| Protections | OCP / OVP / OTP / SCP | OCP / OVP / SCP / OTP | OCP / OVP / SCP | OCP / OVP / UVP / SCP / OTP | OCP / OVP / SCP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 2 | 1 | 2 | 1 |
| PCIe (6+2) Connectors | 1 | 4 | 1 | 4 | 1 |
| SATA Power Connectors | 4 | 8 | 4 | 8 | 4 |
| Molex Connectors | 2 | 4 | 2 | 4 | 2 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Flat | Sleeved | Flat | Sleeved | Flat |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 100,000 hours | 150,000 hours | 100,000 hours | 150,000 hours | 100,000 hours |
| Operating Temperature | 40°C | 50°C | 50°C | 50°C | 40°C |
| Product Name | C3KX-PWR-350WAC/2 | C3KX-PWR-1100WAC= | C3KX-PWR-440WDC= | C3KX-PWR-1100WAC/2 | C3KX-PWR-350WAC= |
| Height | 5.5 inches | 5.5 inches | 3.4 inches | 5.5 inches | 5 inches |
| Width | 5.9 inches | 8.6 inches | 5.5 inches | 6.3 inches | 6 inches |
| Depth | 6.3 inches | 6.3 inches | 5.9 inches | 5.4 inches | 10 inches |
| Weight | 4.6 lbs | 8.8 lbs | 7 lbs | 18 lbs | 4 lbs |
Reviews & Ratings
F
Farzana Iqbal
4
The /2 unit performs well as a backup, ensuring continuous operation during power events.
H
Henry Lawson
5
Installation was simple, and it provides reliable failover support for our switch.
P
Paula Simmons
5
A dependable secondary power supply that strengthens our high-availability setup.
O
Omar Youssef
5
This redundant unit works exactly as intended and supports uninterrupted service.
Questions & Answers
What is the Cisco Catalyst 3K-X 350W AC Secondary Power Supply (C3KX-PWR-350WAC/2)?
The C3KX-PWR-350WAC/2 is a field-replaceable 350W AC secondary power supply module designed to provide redundant power to Cisco Catalyst 3000-X Series switches.
What are the key features of the C3KX-PWR-350WAC/2?
Key features include 350W AC output, power-factor correction, hot-swap capability, front-panel status LEDs and compliance with industry safety standards.
Which Cisco Catalyst switches support the C3KX-PWR-350WAC/2?
The C3KX-PWR-350WAC/2 is compatible with Cisco Catalyst 3650, 3850 and 3650-X/3850-X Series switches that include a secondary PSU bay.
How do I install the C3KX-PWR-350WAC/2 power supply?
To install, power down the switch (optional), slide the PSU into the secondary bay until it latches, connect the AC power cord, and power on the switch.
Can the C3KX-PWR-350WAC/2 operate in a redundant power configuration?
Yes, the C3KX-PWR-350WAC/2 supports 1+1 redundancy when installed alongside a primary power supply in the same chassis.
What is the output power rating of the C3KX-PWR-350WAC/2?
The C3KX-PWR-350WAC/2 delivers a continuous output of 350 watts at rated AC input voltages.
What AC input voltage and frequency range does the PSU support?
It supports an AC input range of 100–240 VAC at 50–60 Hz for global deployment without manual switching.
What are the dimensions and weight of the C3KX-PWR-350WAC/2?
Dimensions are 3.4” × 8.7” × 1.8” (86 × 221 × 45 mm) and the unit weighs approximately 2.0 lbs (0.9 kg).
How do I replace a failed C3KX-PWR-350WAC/2 unit?
To replace, disconnect the AC cord, release the latch, slide out the failed PSU, insert the new unit until it clicks, and reconnect power.
What LED indicators are provided on the C3KX-PWR-350WAC/2?
The front panel features a green LED for normal operation, an amber LED for fault conditions and an off state to indicate no AC input.
Is the C3KX-PWR-350WAC/2 hot-swappable?
Yes, the C3KX-PWR-350WAC/2 is hot-swappable and can be replaced or added without powering down the switch.
What is the MTBF (Mean Time Between Failures) of the C3KX-PWR-350WAC/2?
The C3KX-PWR-350WAC/2 has an MTBF of approximately 200,000 hours under typical operating conditions.
What environmental conditions are required for the C3KX-PWR-350WAC/2?
Operating conditions are 0–40 °C temperature, 10–90% non-condensing humidity and altitude up to 5,000 ft (1,524 m).
Does Cisco provide a warranty for the C3KX-PWR-350WAC/2?
Yes, Cisco offers a one-year limited hardware warranty, with optional extensions available through Cisco service contracts.
How can I troubleshoot power supply issues with the C3KX-PWR-350WAC/2?
Verify AC source, inspect LEDs, confirm proper seating, review switch logs for power events and replace the PSU if the amber LED persists.
Where can I purchase genuine Cisco C3KX-PWR-350WAC/2 units?
Genuine units are available through Cisco authorized resellers, the Cisco Online Store and certified distribution partners.
Does the C3KX-PWR-350WAC/2 include all necessary power cables?
The PSU ships with a region-specific AC power cord; rack-mount hardware and secondary cables are ordered separately.