Astron RS4A 4A Regulated Power Supply Output Voltage: 13.8 VDC (+/- 0.05 V) Internally Adjustable (11-15 V). Continuous Amperage Output: 3A. ICS (Surge) Amperage Output: 4A. Solid State Electronically Regulated. Fold-Back Current Limiting: Protects Power Supply from Excessive Current and Continuous Shorted Output.