The EA63-2.5 is a general purpose Voltage Regulator designed for smaller 50/60 Hz brushless generators. The regulator has under frequency compensation and automatic build-up circuitry, EMI filtering with remote Voltage Rheostat capability.Input:Voltage 120(90~130) / 240(180~260) VAC 1 phase 2 wire DIP switch selectable Frequency 45~65 HzOutput:Voltage Max. 50 VDC @ 120 VAC input , Max. 63 VDC @ 240 VAC input Current Continuous 2.5A, Intermittent 4A for 60 sec. Resistance Min. 25 OhmVoltage Regulation:< ±1% (within 4% engine governing)Voltage Build-up:  Residual volts at AVR terminal > 5 VACExternal Volts Adjustment:  ±15% with 5 K Ohm 1 watt trimmerUnit Power Dissipation:  Max. 10 wattEMI Suppression:  Internal electromagnetic interference filteringThermal Drift:  0.05% per °C change in AVR ambientUnder Frequency Protection:  Knee point adjustable range 45~55 HzEnvironment:  Operating Temperature : -40~60 °C Storage Temperature : -40~85 °C Relative Humidity : Maximum 95% Vibration : 1.5G @ 5~30 Hz / 5.0G @ 30~500 HzAVR Controls Functions:  VOLTS : Voltage Adjustment U/F*: To Set the U/F Knee Point (*U/F: Under Frequency Protection) DIP : 110V/220V optionShock:  Withstands up to 20G in each X, Y, Z axesDimensions:  101.0 (L) x 69.0 (W) x 22.0 (H) mmWeight:  107 g ±2%