Cisco Systems 4948E-F manual Table A-1 300 W AC-Input Power Supply Specifications

Appendix A Power Supply Specifications

300 W AC-Input Power Supply (PWR-C49E-300AC-R)

Table A-1lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-R).

Table A-1 300 W AC-Input Power Supply Specifications

Item	Specification
AC-input type	• Autoranging input with power factor correction (PFC).
	• Power factor correction is a standard feature. PFC reduces the
	reactive component in the source AC current allowing higher
	power factors and lower harmonic current components.
AC-input voltage	• Low-line (120 VAC nominal)—85 VAC (min) to 132 VAC
	(max)
	• High-line (230 VAC nominal)—170 VAC (min) to 264 VAC
	(max)
AC-input current	• 4 A @ 100 VAC (maximum)
	• 2 A @ 240 VAC (maximum)
AC-input frequency	47 to 63 Hz
Branch circuit requirements	Each chassis power supply should have its own dedicated,
	fused-branch circuit:
	• For North America—15 A
	• For International—Circuits sized to local and national codes
	• All AC power supply inputs are fully isolated.
	– Source AC can be out of phase between multiple power
	supplies in the same chassis, which means that PS1 can be
	operating from phase A and PS2 can be operating from
	phase B.
	– For high-line operation, the power supply operates with the
	line conductor wired to a source AC phase and the neutral
	conductor wired either to neutral or to another source AC
	phase as long as the net input voltage is in the range of 170
	to 264 VAC.
Power supply output	25 A @+12 VDC
Output holdup time	20 ms minimum
kVA rating1	0.375 kVA
Power supply fan	• One temperature-controlled, variable-speed fan
	• Airflow direction—Back to front
	• The power supply fan has four speed settings. The speed
	settings are dependent on the air temperature detected by the
	inlet air temperature sensor mounted in the chassis. See
	Table A-2for inlet temperature ranges and corresponding fan
	speeds.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

OL-21561-02 A-3