Cisco Systems 4900 Series manual DC Power

Appendix A Specifications

Catalyst 4900 Series Switch Specifications

Table A-4	Catalyst 4900 Series Switch Specifications (continued)
Item		Specification
Power supply output		300 W
AC-input		4 A maximum @ 100 VAC
		2 A maximum @ 240 VAC
AC frequency		50 to 60 Hz
Output current		25	A max
Peak current		4 A max @ 100 VAC
		2 A max @ 240 VAC
Inrush value		20	A for one cycle of AC
Output voltage		12	V
Input KVA rating		0.375 KVA
DC Power
Minimum input		–40.5 VDC
Power supply output		300 W
DC-input		8 A @ –48 to –60 VDC
Output current		25	A max
Peak current		8 A @ –48 to –60 VDC
Inrush value		Cold turn on (PSU off for > 1 hour) – 45 A
		Hot turn on (PSU on for > 1 hour) – 90 A
Output voltage		12	V
Input KVA rating		0.4 KVA

	Catalyst 4900 Series Switch Installation Guide
A-4	78-18039-02