I recently bought the 341-0037-01 - Cisco 1000-Watts Ac Power Supply to fix a broken power supply in a Catalyst 4500 switch for the business. The performance of the new power supply has me quite pleased. It is effective and silent, and it hasn't interfered with the transition in any way. Other network experts looking for a dependable and superior power supply for their Cisco switches should consider the 341-0037-01 - Cisco 1000-Watts Ac Power Supply, in my opinion.