Optocoupler

4N25

4N25 6-pin DIP transistor-output optocoupler.

4N35

4N35 6-pin DIP transistor-output optocoupler (popular general-purpose).

6N137

6N137 high-speed (10 Mbit) logic-output optocoupler, 8-pin DIP.

6N138

6N138 high-gain Darlington-output optocoupler, 8-pin DIP.

EL817

EL817 transistor-output optocoupler (PC817-compatible 4-pin DIP) for signal isolation.

H11AA1

H11AA1 AC-input optocoupler (anti-parallel LED inputs) for AC line sensing.

LTV817

LTV817 transistor-output optocoupler (PC817-compatible 4-pin DIP) for signal isolation.

MOC3021

MOC3021 random-phase triac-driver optocoupler — isolates an MCU from a mains triac.

MOC3041

MOC3041 zero-cross triac-driver optocoupler — isolates an MCU from a mains triac.

MOC3063

MOC3063 zero-cross triac-driver optocoupler — isolates an MCU from a mains triac.

PC817 · Sharp

The PC817 is a 4-pin optocoupler: an internal LED drives a phototransistor across an isolation barrier, letting one circuit control another with no electrical connection. Common for isolating MCU inputs/outputs.

PC827

PC827 transistor-output optocoupler (PC817-compatible 4-pin DIP) for signal isolation.

TLP281

TLP281 transistor-output optocoupler (PC817-compatible 4-pin DIP) for signal isolation.

TLP521

TLP521 transistor-output optocoupler (PC817-compatible 4-pin DIP) for signal isolation.