* Minimum Current Transfer Ratio at IF = 10 mA, VCE = 10 V * 10% for 4N27M and 4N28M * 20% for 4N25M and 4N26M * 100% for 4N35M, 4N36M and 4N37M * Safety and Regulatory Approvals * UL1577, 4,170 VACRMS for 1 Minute * DIN-EN/IEC60747-5-5, 850 V Peak Working Insulation Voltage