Isocom, H11B3 DC Input Photodarlington Output Optocoupler, Surface Mount, 6-Pin DIP. Maximum Forward Voltage: 1.5V. Typical Rise Time: 125µs. Maximum Input Current: 80 mA. Isolation Voltage: 5.3 kVrms, 7500 V Pk. Typical Fall Time: 100µs. Minimum Current Transfer Ratio: 1.0.