The TLP120-4 is a small‑outline optocoupler designed for surface‑mount assembly. It combines a phototransistor with two gallium‑arsenide infrared emitting diodes optically coupled in inverse parallel.
The datasheet lists maximum ratings, electrical characteristics, isolation performance, and switching times, along with recommended operating conditions and package dimensions for designers.
| Collector‑Emitter Voltage (VCE) | 80 V (min) |
|---|---|
| Isolation Voltage | 3750 Vrms (AC, 1 min, 60 % RH) |
| Forward Current (IF) | 50 mA |
| Storage Temperature Range | -55 °C to 125 °C |
| Operating Temperature Range | -55 °C to 160 °C |
| Supply Voltage | 5 V to 48 V |
| Total Package Power Dissipation | 200 mW (TLP120) / 170 mW (TLP120‑4) |
The TLP120-4 provides an isolation voltage of 3750 Vrms (AC, 1 minute, 60 % RH).
The maximum forward current is 50 mA.
A supply voltage between 5 V and 48 V is recommended.
It uses a small‑outline surface‑mount coupler package.