TLP172A is a photocoupler from Toshiba. It has a 4-pin SOP package and can be used as a high current switch. The maximum output current is 400mA and the maximum isolation voltage is 1500Vrms.
The TLP172A is a gallium‑arsenide infrared emitting diode optically coupled to a photo‑MOSFET in a 4‑pin SOP package. It is a normally‑open (1‑form‑A) photorelay suitable for on/off control of high‑current loads in telecommunications, data acquisition, security, and measurement equipment.
The document lists maximum ratings, recommended operating conditions, and detailed electrical, isolation, and switching characteristics, as well as handling and safety restrictions for reliable integration into electronic designs.
| Peak off‑state voltage | 60 V (min) |
|---|---|
| Trigger LED current | 3 mA (max) |
| On‑state current | 400 mA (max) |
| Isolation voltage | 1500 Vrms (min) |
The device can handle up to 400 mA of on‑state current.
It provides a minimum isolation voltage of 1500 Vrms.
The recommended operating temperature range is –20 °C to 65 °C.