4-Pin Full Pitch Mini-Flat Package Phototransistor Optocouplers Features: More than 5mm Creepage/Clearance; Current Transfer Ratio in Selected Groups DC Input: FODM121: 50600% FODM121A: 100300% FODM121B: 50150% FODM121C: 100200% FODM124: 100% MIN FODM2701: 50300% AC Input: FODM2705: 50300%; Compact 4-Pin Surface Mount Package (2.4mm Maximum Standoff Height); Safety and Regulatory Approvals: UL1577, 3,750 VACRMS for 1 Minute DINEN/IEC6074755, 565 V Peak Working Insulation Voltage