REFURBISHED
Cisco
Cisco N540-PWR400-A Refurbished — 400W AC Power Supply Module
MPN: N540-PWR400-A
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Lifetime
Warranty
ISO 9001
Certified Testing
R2v3
Responsible Refurb
25+
Years
5K+
Customers
ISO
Certified
✓
Tested
Every WhaleyComm unit is professionally tested, reset to factory defaults, and certified by our in-house engineers — the same standard trusted by 5,000+ organisations across 25 years. Not a refurb marketplace. A certified lifecycle partner.
Professionally tested and reset to factory defaults. Backed by 25+ years of enterprise trust.
This refurbished Cisco N540-PWR400-A is a 400W AC power supply module designed specifically for the Cisco Network Convergence System 540 (NCS 540) router platform. Every unit is professionally tested and reset to factory defaults before shipping, ensuring it meets the same operational standards as new equipment at a fraction of the cost.The N540-PWR400-A is a hot-swappable, plug-in module that supports 1+1 power redundancy in the Cisco NCS 540 chassis. The NCS 540 platform accepts two power supplies simultaneously, with the second unit providing live redundancy — meaning this module can be installed or replaced without taking the system offline. It delivers 400 watts of continuous AC power and accepts a wide input voltage range of AC 90–265V, making it compatible with a broad range of facility power environments globally.
Procuring refurbished Cisco hardware through WhaleyComm is a proven strategy for enterprise, service provider, and government teams looking to extend NCS 540 deployments, build out spare pools, or refresh aging power infrastructure without the lead times or cost of new. WhaleyComm is ISO 9001, R2v3, and e-Stewards certified — your assurance that every unit is sourced, tested, and handled responsibly.
Technical Specifications
Part Number
N540-PWR400-A
Platform Compatibility
Cisco Network Convergence System 540 (NCS 540)
Power Supply Type
AC
Output Power
400W
Input Voltage
AC 90–265V
Form Factor
Plug-in module
Hot-Swap Support
Yes
Redundancy Support
1+1 redundant (supports two power supplies per chassis)
Ideal Use Cases
NCS 540 Power Redundancy
Deploy a second N540-PWR400-A in an NCS 540 chassis to achieve 1+1 power redundancy, ensuring the router stays online even if the primary power supply fails. Both supplies support hot-swap, so the changeover is hitless.
Spare Parts Pool for Service Providers
Telecom and service provider operations teams maintaining large NCS 540 fleets benefit from stocking refurbished N540-PWR400-A units as cold spares, reducing mean-time-to-repair when a field unit needs replacement.
Enterprise WAN Edge Refresh
Enterprise network teams running NCS 540 routers at WAN edge or aggregation layers can replace aging or failed power supplies cost-effectively without refreshing the entire chassis.
Lab and Pre-Production Environment Builds
Network engineers building NCS 540 lab environments for pre-production testing, software validation, or training can populate lab chassis with refurbished power supplies at a significant savings versus new.
Data Center and Colocation Deployments
Operators deploying NCS 540 routers in data center or colocation environments can use the N540-PWR400-A to ensure dual-supply configurations are maintained across all chassis without overspending on power infrastructure.
What's Included
1x Cisco N540-PWR400-A 400W AC Power Supply Module
Certificate of Testing
Lifetime Warranty — No Time Limits. No Questions.
Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it. We have stood behind our hardware for 25 years and 5,000+ customers — that is not a marketing line, it is our operating standard.
Compatibility Details
Review supported optics, cables, software, management protocols, and environment-specific compatibility guidance.
COMPATIBLE PLATFORMS
✓
The NCS 540 chassis accepts two power supply modules simultaneously for 1+1 redundant operation.
ADDITIONAL COMPATIBILITY
✓
The Cisco N540-PWR400-A is the AC 400W power supply module for the Cisco NCS 540 router series.
✓
Compatible NCS 540 variants include the N540-ACC-SYS, N540X-ACC-SYS, N540-24Z8Q2C-SYS, N540X-16Z4G8Q2C-A/D, N540-28Z4C-SYS-A/D, N540-12Z20G-SYS-A/D, and N540X-12Z16G-SYS-A/D among others in the NCS 540 family.
For compatibility verification specific to your environment, contact our engineering team: +1 214 607-4800 or sales@whaleycomm.com
Shipping & Returns
Clear fulfilment, tracking, return, warranty, and support information for enterprise hardware orders.
Shipping
Orders typically ship within 1-2 business days after payment confirmation. Tracking details are shared once the order has been dispatched.
Returns
Eligible products can be returned according to WhaleyComm's return policy. For DOA, warranty, or product-related issues, contact the support team for replacement or resolution.
Frequently Asked Questions
Product-specific answers about compatibility, testing, warranty, fulfilment, and purchase confidence.
The N540-PWR400-A is the AC 400W power supply module for the Cisco Network Convergence System 540 (NCS 540) router series. The NCS 540 chassis accepts two power supplies simultaneously to support 1+1 redundancy. For compatibility verification specific to your chassis variant, contact our engineering team at +1 214 607-4800 or sales@whaleycomm.com.
Yes. The N540-PWR400-A supports hot-swap (online insertion and removal), as confirmed in Cisco NCS 540 hardware documentation. This means the module can be installed or replaced while the chassis remains powered and operational, minimizing downtime during maintenance or upgrades.
The N540-PWR400-A is the AC input version of the 400W NCS 540 power supply, while the N540-PWR400-D is the DC input variant. Both deliver 400W to the NCS 540 chassis. The correct choice depends on your facility power infrastructure — AC or DC plant.
Yes. Every WhaleyComm unit ships with a Lifetime Warranty. If it fails under normal operating conditions at any point, we replace it at no cost — no time limits, no questions asked.
Every unit goes through our ISO 9001-certified testing process: full power-on diagnostics, port-by-port functionality testing, firmware verification, factory reset, and final inspection. A Certificate of Testing ships with every unit.
Cisco N540-PWR400-A Refurbished — 400W AC Power Supply Module
$625.00
Cisco
Cisco N540-PWR400-A Refurbished — 400W AC Power Supply Module
MPN: N540-PWR400-A
$625.00
In Stock — Ships Same Day
