The PS2561A-1 is an optically coupled isolator from NEC Electronics with high isolation voltage (BV = 5 000 Vr.m.s.) and lead-free product.
The PS2561 series are optically coupled isolators that combine a GaAs light‑emitting diode with an NPN silicon phototransistor. The PS2561A-1 is supplied in a plastic DIP package, while the PS2561AL‑1, PS2561AL1‑1 and PS2561AL2‑1 are offered in surface‑mount gull‑wing packages.
Key specifications include a high isolation voltage of 5 kV rms, a collector‑to‑emitter voltage rating of 70 V, forward current up to 30 mA, and a current transfer ratio (CTR) ranging from 50 % to 400 %. The devices are UL, CSA, BSI, SEMKO, NEMKO, DEMKO, FIMKO and DIN‑EN60747‑5‑2 approved, making them suitable for power supplies, telecom, PLCs and other applications.
| Isolation Voltage (BV) | 5 000 V rms |
|---|---|
| Collector‑to‑Emitter Voltage (VCEO) | 70 V |
| Forward Voltage (Diode, typical) | 1.4 V |
| Forward Current (DC) | 30 mA |
| Current Transfer Ratio (CTR, typical range) | 50 % – 400 % |
| Power Dissipation (continuous) | 150 mW |
| Operating Ambient Temperature | -55 °C to +100 °C |
The PS2561 series provides an isolation voltage of 5 000 V rms.
The PS2561A-1 is supplied in a plastic DIP (Dual In‑line Package) while the other variants are offered in surface‑mount gull‑wing packages.