The TLP121 is a miniature optocoupler that integrates a gallium‑arsenide infrared emitting diode with a photo‑transistor. It is intended for surface‑mount assembly in general electronics applications such as computers, office equipment, and industrial robotics.
The document lists maximum ratings, individual and coupled electrical characteristics, switching performance, and isolation specifications, as well as safety and usage restrictions for designers.
| Collector‑Emitter Voltage VCEO | 80 V (Min) |
|---|---|
| Isolation Voltage | 3750 Vrms (Min) |
| Current Transfer Ratio (CTR) | 50 % (Min) |
| Forward Current Ip | 50 mA |
| Storage Temperature Range | -55 °C to 125 °C |
The maximum collector‑emitter voltage is 80 V (minimum rating).
The isolation voltage is 3750 Vrms minimum.
The minimum current transfer ratio is 50 %.
The device can be stored from –55 °C to 125 °C.