The TLP120 is a TOSHIBA mini flat coupler, suitable for surface mount assembly. It consists of a photo transistor and two gallium arsenide infrared emitting diode connected inverse parallel, and can operate directly by AC input current.
The TLP120 is a small‑outline, surface‑mount optocoupler that combines a GaAs infrared emitting diode and a photo‑transistor. It is designed for use in general electronics applications such as computers, office equipment, and industrial robotics, and provides isolation up to 3750 V rms.
Key electrical characteristics include a collector‑emitter voltage rating of 80 V, a minimum current transfer ratio of 50 %, and a forward current rating of 50 mA RMS. Recommended supply voltage is 5‑48 V, and the device operates over a temperature range of –55 °C to 100 °C. The package weighs only 0.09 g and is intended for surface‑mount assembly.
| Collector‑emitter voltage (VCE) | 80 V (min) |
|---|---|
| Current transfer ratio (CTR) | 50 % (min) |
| Isolation voltage | 3750 V rms (min) |
| Forward current RMS (IF) | 50 mA |
| Supply voltage (VEC) | 5‑48 V |
| Weight | 0.09 g |
The device is rated for a collector‑emitter voltage of at least 80 V.
It provides a minimum isolation voltage of 3750 V rms.
The CTR is specified as a minimum of 50 %.
The recommended supply voltage range is 5 V to 48 V.