909032059/1.00 – 24VDC DIN Rail Power Supply with Battery Output at 50W The new PAC 3A power supplies are designed to be eco-friendly but with high performance. The PAC 3A PSU has been designed and tested to meet the strict California Energy Commission (CEC) Level 6 standards. They have limited power consumption, thanks to high efficiency (80% efficiency in most load scenarios), to provide a stable 24VDC output.