The TLP521‑1, TLP521‑2 and TLP521‑4 are solid‑state optocouplers that combine a gallium‑arsenide infrared emitting diode with a phototransistor. They are offered in 8‑lead (TLP521‑2) and 16‑lead (TLP521‑4) DIP packages for use in general electronics, industrial robotics, and appliance applications.
The document lists maximum ratings, recommended operating conditions, and detailed electrical characteristics such as forward current, collector‑emitter voltage, isolation voltage, power dissipation, and switching times. Graphs illustrate performance versus temperature and duty‑cycle.
| Collector‑Emitter Voltage (VCEO) | 55 V |
|---|---|
| Isolation Voltage (BVg) | 2500 Vrms (1 min, AC) |
| Forward Current (If) | 70‑50 mA |
| Collector Current (Ig) | 50 mA |
| Total Package Power Dissipation (P_R) | 250 mW (typ), 150 mW (max) |
| Storage Temperature Range (T_stg) | -55 °C to 125 °C |
| Lead Soldering Temperature (T_gol) | 260 °C (10 s) |
The isolation voltage is rated at 2500 Vrms for 1 minute AC (R.H. = 60%).
The maximum collector current is 50 mA.
A supply voltage between 5 V and 24 V is recommended.