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N55-PAC-750W
Cisco N55-PAC-750W 750W AC Hot-Swap Power Supply for Nexus 5...
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N55-PAC-750W is a 750W AC hot-swap internal power supply for Nexus 5548P and Nexus 5548UP switches. The module uses port-side exhaust airflow and 100-240V AC input. A second matching supply adds power redundancy in the two front-end supply bays. Buyers replacing a Cisco Nexus 5548 power supply should match the airflow direction on the chassis label and the fan modules. Nexus 5548P accepts port-side exhaust airflow only. Nexus 5548UP accepts port-side exhaust or port-side intake airflow, but every supply and fan module in the chassis must match. N55-PAC-750W-B is the port-side intake airflow version for Nexus 5548UP, not Nexus 5548P. The module is Non-PoE, so no switch PoE budget is assigned to it.
N55-PAC-750W price for new stock is $125.99, a 13.7% saving from the Cisco list price of $145.99. N55-PAC-750W refurb price is $78.75. N55-PAC-750W is in stock and available for free next-day delivery. (terms applied)
Request bulk order quote for N55-PAC-750W for additional pricing. Browse the full Cisco N55-PAC Nexus 5500 Power Supplies series or explore all Cisco products.
750W maximum rated power output sets the replacement target for the Nexus 5548 supply bay. 100-240V AC input and 50-60 Hz frequency fit standard AC rack feeds. 10A/3.75A input current sets the circuit check before the PO. 95 to 98% efficiency applies at 50 to 100% load, and 51 BTU/hr heat dissipation keeps the rack thermal calculation tied to the supply. N55-PAC-750W is hot-swappable only while the other power supply is functioning. One supply runs the switch, two supplies support redundancy, and a single-supply chassis uses a blank filler in the open bay. CAB-9K12A-NA power cord uses an IEC C13 connector at the switch end. 0°C to 40°C operating temperature is the normal rack range for Nexus 5548 operation.
N55-PAC-750W is available new sealed or certified refurbished. New units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and returns are 30 days on every condition; terms apply. Certified refurbished units are inspected and bench-tested in a compatible host or on a load tester, with hot insertion and removal verified in a live host. Order the port-side exhaust 750W AC module when the failed unit label matches the PID and airflow. UK, EU, US and MEA stock support multi-site sparing, with RMA advance replacement, PO accepted and Net-30 for government.
| Key Specs | Key Spec Values |
|---|---|
Rated Output | 750W |
Input | AC, 100-240V AC |
Fits | Nexus 5548 |
Hot-Swap | Hot-Swap with two supplies |
Airflow | Port-Side Exhaust |
Lifecycle Status | Cisco service ended May 31, 2024 |
Your Nexus 5548P or Nexus 5548UP estate is past Cisco service after May 31, 2024. Keep spares matched by front-to-back airflow and AC input. Before the PO, confirm the failed supply label, fan airflow, and whether the chassis has one or two installed supplies.
A failed front-to-back 750W AC supply in a Nexus 5548P or Nexus 5548UP can be replaced with the same PID. Match the unit label before the PO, keep the airflow aligned with the fans, and leave a working supply installed during live replacement.
A single-supply Nexus 5548 chassis can run with one supply, but the second bay supports power redundancy. Specify the same front-to-back airflow module for the added bay, use separate power sources for two supplies, and keep an open bay filled until the second supply is installed.
Nexus 5596UP switches
Nexus 5596UP uses 1100W front-to-back AC power in its supply bay; order N55-PAC-1100W for that chassis. A 750W Nexus 5548 module does not fit.
Port-side intake Nexus 5548UP racks
Nexus 5548UP back-to-front airflow builds need the intake supply and matching fan direction; order N55-PAC-750W-B for that airflow before replacement.
-48V DC sites
The AC module takes 100-240V AC input only. -48V DC Nexus 5548P and Nexus 5548UP sites use N55-PDC-750W instead for power.
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
| N55-PAC-750W |  PWR-C49M-1000DC |  PWR-RGD-AC-DC-H |  CP-PWR-CUBE-5 |  C4KX-PWR-750AC-F | |
|---|---|---|---|---|---|
| Form Factor | Internal Module | ATX | Internal Module | ATX | ATX |
| Hot-Swap Capable | Hot-Swap | No | Hot-Swap | No | No |
| Wattage | 750W | 1000W | 150W | 600W | 750W |
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N55-PAC-750W is the Cisco Nexus 5548P/5548UP power supply front-to-back (port-side exhaust) airflow module, AC, 100-240V, 750W. The spare form is N55-PAC-750W(=). The base module ships in Nexus 5548 chassis bundles with two 750W AC power supplies. The module fits 5548P and 5548UP bays.
N55-PAC-750W fits Nexus 5548P and Nexus 5548UP switches. Nexus 5548P takes front-to-back airflow only, and Nexus 5548UP accepts front-to-back or back-to-front airflow. The supply does not fit Nexus 5596UP; that switch uses N55-PAC-1100W for front-to-back AC power.
Nexus 5548P uses N55-PAC-750W for 750W AC front-to-back airflow and N55-PDC-750W for 750W DC front-to-back airflow. Nexus 5548UP also uses N55-PAC-750W-B for 750W AC back-to-front airflow. Match the fan modules and the supply airflow before the PO.
N55-PAC-750W is rated at 750W maximum output with 100-240V AC input, 50-60 Hz frequency and 10A/3.75A input current. The Nexus 5548 AC supply runs at 95 to 98% efficiency from 50 to 100% load and dissipates 51 BTU/hr. Operating range is 0°C to 40°C.
Yes, N55-PAC-750W is hot-swappable in a Nexus 5548 switch when the other power supply is functioning. One supply can run the switch, and two supplies support redundancy. Removing the only installed supply shuts down the chassis, so keep the second bay filled.
N55-PAC-750W uses AC input at 100-240V AC and 50-60 Hz. The AC supply has 10A/3.75A input current. The module is Non-PoE, so the supply does not add a PoE budget to a Nexus 5548 switch. The supply powers the switch hardware only.
A Nexus 5548 power supply uses a separate power cord with an IEC C13 connector at the switch end. CAB-9K12A-NA is the 125 VAC 13A North America cord. CAB-C13-C14-JMPR is the 250 VAC 13A cabinet jumper for a power distribution unit connection.
No, N55-PAC-750W does not fit Nexus 5596UP switches. Nexus 5596UP uses 1100W AC power for front-to-back airflow with N55-PAC-1100W. A buyer holding a failed 5596UP supply should match the 1100W PID, the unit label and chassis airflow before the PO.
N55-PAC-750W uses front-to-back airflow, also called port-side exhaust airflow, in Nexus 5548P and Nexus 5548UP switches. The power supply and fan modules in the same chassis must use one direction. Nexus 5548P accepts port-side exhaust airflow only. Nexus 5548UP can also use intake modules.
A Nexus 5548 switch needs one N55-PAC-750W to run when the chassis is built for front-to-back AC power. Two power supplies support redundancy. If only one power supply is installed, the other power supply bay needs a blank filler to maintain designed airflow.
N55-PAC-750W(=) is the spare form for N55-PAC-750W. The non-equals base PID is used in chassis orders, and the equals form is used for spare replacement orders. The airflow, 750W AC rating and Nexus 5548P/5548UP fit stay the same.
N55-PAC-750W uses port-side exhaust airflow and fits Nexus 5548P and Nexus 5548UP. N55-PAC-750W-B uses port-side intake airflow and fits Nexus 5548UP. Choose the front-to-back module for 5548P or exhaust-fan 5548UP chassis, and choose the -B module for intake-fan 5548UP chassis.
N55-PAC-750W is the 750W AC front-to-back airflow power supply for Nexus 5548P and Nexus 5548UP. N55-PDC-750W is the 750W DC front-to-back airflow power supply for the same switches. Choose the AC PID for 100-240V AC feeds and the DC PID for -40 to -72V DC feeds.
Cisco stopped selling N55-PAC-750W on May 5, 2019. Cisco service ended on May 31, 2024. No replacement product is available for this product. The affected Nexus 5500 switches share the same last date of support.
ORM offers N55-PAC-750W new sealed or certified refurbished. Cisco service ended on May 31, 2024, so ORM's warranty is the cover that applies. New units carry up to a 3-year extended warranty, certified refurbished units carry up to 1 year, and returns are 30 days on every condition; terms apply.
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