MEAN WELL RSP-1000-48 1008W 1U Enclosed Power Supply 48V 21A with Active PFC

High-density industrial and networking equipment demands a power source that delivers stable 48V output without wasting rack space or compromising on safety. The MEAN WELL RSP-1000-48 answers that call with 1008 watts of reliable power in a slim 1U low-profile chassis, complete with active power factor correction and a full suite of protections.

Who is it for

System integrators, network engineers, and industrial automation specialists who need a dependable, high-efficiency AC/DC power supply for servers, storage arrays, telecom gear, or LED lighting systems. Its 1U form factor makes it ideal for rack-mounted installations where space is at a premium.

Main features

• 1008W output power with 48V DC and 21A current
• Wide input range: 90~264V AC (127~370V DC) with active PFC
• Up to 90% efficiency for lower energy costs and heat generation
• Built-in DC fan with speed control for optimal cooling
• Protections: short circuit, overload, over voltage, over temperature
• Remote ON/OFF and remote sense for system integration
• Auxiliary 5V/0.3A standby output
• Current sharing up to 4 units for parallel operation
• Complies with UL60950-1, TUV EN60950-1, CB safety standards
• EMC meets EN55032 Class B and EN61000 series

Specifications

• Output power: 1008 W
• Output voltage: 48 V DC
• Output current: 21 A
• Input voltage: 90~264 V AC, 127~370 V DC
• Input frequency: 47~63 Hz
• Efficiency: up to 90%
• Power factor correction: Active
• Form factor: 1U low profile enclosed
• Cooling: Built-in DC fan with speed control
• Operating temperature: -20~+60 °C
• Isolation voltage: 3000 V AC (input to output)
• MTBF: >100K hours
• Dimensions (W x H x D): 127 x 41 x 261 mm
• Weight: 2.3 kg

Tips

For redundant power configurations, use the current sharing function to parallel up to four units. Ensure adequate airflow in the rack—although the fan is temperature-controlled, proper ventilation extends component life. The auxiliary 5V output can power standby circuits or monitoring modules without an additional supply.