The Cisco PWR-C1-1100WAC is an 1100 W field-replaceable AC power supply for Catalyst switches, and it is the default supply fitted to the highest-PoE members of the Catalyst 3850 line. It is also named in Cisco's Catalyst 9300 power tables, so this one part number covers two switch generations, rather than only the 3850 line it was built for.
Which switches take this supply
Catalyst 3850 models that ship with the PWR-C1-1100WAC as their default supply are the 48-port full-PoE WS-C3850-48F, the UPOE WS-C3850-24U and WS-C3850-48U, and the 10 Gigabit uplink WS-C3850-24XU and WS-C3850-48XU. The PoE budget those switches deliver with this supply fitted is 800 W on the 48F, 24U and 48U, 580 W on the 24XU and 630 W on the 48XU.
Cisco's Catalyst 9300 documentation names PWR-C1-1100WAC and PWR-C1-1100WAC-P interchangeably in its power supply requirement tables, which makes this part relevant to 9300 modular-uplink switches as well as to the 3850 fleet it was introduced for.
| Host switch | Role of this supply | PoE budget delivered |
|---|---|---|
| WS-C3850-48F | Default | 800 W |
| WS-C3850-24U and WS-C3850-48U | Default | 800 W |
| WS-C3850-24XU | Default | 580 W |
| WS-C3850-48XU | Default | 630 W |
| Catalyst 9300 modular-uplink models | Named in the Cisco 9300 supply tables | Per model |
Using it as a second supply for full PoE+
Full 30 W PoE+ on every port is the case that decides how many supplies a switch needs, and Cisco states it as a supply combination rather than a wattage. A 24-port Catalyst 3850 running 30 W on all ports requires one PWR-C1-1100WAC or two PWR-C1-715WAC units. A 48-port model requires two PWR-C1-1100WAC units, or one PWR-C1-1100WAC together with one PWR-C1-715WAC. Published mean time between failures for this supply is 392,174 hours, and the Cisco spare part number is PWR-C1-1100WAC=.
Condition, testing and what ships
Supplies are refurbished Cisco parts carrying the original part number, tested on receipt and tested again on the bench before despatch. Parts including power supplies carry the 1-year Enterasource warranty. Shipping is free FedEx Ground to the lower 48 states. Airflow direction and connector type are confirmed against your chassis at the time of quotation rather than assumed from the part number, because supply and fan airflow have to match within a single chassis and the naming conventions across Cisco supply families are not consistent.
Related Catalyst parts and switches sit in the Cisco networking hardware range, including the Catalyst 3850 fan module that serves the same chassis.
Frequently Asked Questions
Which Catalyst 3850 switches use the PWR-C1-1100WAC?
It is the default supply on the WS-C3850-48F, the UPOE WS-C3850-24U and WS-C3850-48U, and the 10 Gigabit uplink WS-C3850-24XU and WS-C3850-48XU. Fitted to those switches it delivers 800 W of PoE budget on the 48F, 24U and 48U, 580 W on the 24XU and 630 W on the 48XU, which is the figure to plan powered endpoints against.
Can a PWR-C1-1100WAC be used in a Catalyst 9300?
Cisco names PWR-C1-1100WAC and PWR-C1-1100WAC-P interchangeably in the power supply requirement tables for the Catalyst 9300, so the part is documented for that platform as well as for the 3850. Confirm the exact requirement against the specific 9300 model and its uplink module before ordering, since supply requirements on that platform vary by PoE class and port count. See the Catalyst 9300-48U and Catalyst 9300-24U.
How many power supplies does a Catalyst 3850 need for 30 W on every port?
A 24-port switch needs one PWR-C1-1100WAC, or two PWR-C1-715WAC units in its place. A 48-port switch needs two PWR-C1-1100WAC units, or one PWR-C1-1100WAC paired with one PWR-C1-715WAC. Those are Cisco's stated combinations for delivering the full 30 W PoE+ class on all ports simultaneously, rather than a derived calculation from the supply wattage.
Is this a field-replaceable part?
Yes. The PWR-C1-1100WAC is a field-replaceable unit that installs into the supply bay of a supported Catalyst chassis, which is what makes both in-service replacement and second-supply redundancy possible without changing the switch. The Cisco spare part number carries a trailing equals sign, PWR-C1-1100WAC=, and published mean time between failures for the unit is 392,174 hours.
