This document describes the characteristics of PS2533-1 and PS2533L-1 optically coupled isolators, including high collector to emitter voltage (VCEO = 350 V), high Isolation voltage (BV = 5 000 Vr.m.s.), high current transfer ratio (CTR = 4 000% TYP.), high-speed switching (tr, tf = 100 µs TYP.) etc.
The NEC PS2533-1 (plastic DIP) and PS2533L-1 (lead‑bending surface‑mount) are optically coupled isolators that combine a GaAs LED with an NPN Darlington phototransistor. They are designed for high‑voltage isolation and high current‑transfer ratios, suitable for telephone exchange equipment, fax and modem applications.
The sheet provides detailed package dimensions, absolute maximum ratings, electrical characteristics, ordering information and safety‑standard approvals (UL, BSI, CSA, NEMKO, etc.). It also includes handling and disposal guidelines for the GaAs material.
| Collector to emitter voltage (Vceo) | 350 V |
|---|---|
| Isolation voltage (BV) | 5 000 Vrms |
| Current transfer ratio (CTR) typical | 4 000 % |
| Switching time (tr, tt) | 100 ns |
| Diode forward current (If) | 80 mA |
| Peak forward current (Ip) | 1 A |
| Operating temperature range | -55 °C to +100 °C |
| Storage temperature range | -55 °C to +150 °C |
The device can withstand up to 350 V between collector and emitter.
It is approved by UL, BSI, CSA, NEMKO, SEMKO, DEMKO, FIMKO and DIN EN60747‑5‑2 (optional).
Typical CTR is 4 000 %.
It operates from –55 °C up to +100 °C.