This document introduces the NEC Electronics PHOTOCOUPLER PS2911-1 product, which features an ultra small package, high current transfer ratio, and high isolation voltage. It is suitable for applications such as DC/DC converters and modems.
The PS2911-1 is an ultra‑small flat‑lead phototransistor optocoupler that combines a GaAs LED and an NPN silicon phototransistor in a 4‑pin package. It is intended for high‑density mounting applications and offers a typical current transfer ratio of 200% at 1 mA forward current.
Key specifications include a package size of 4.6 mm × 2.5 mm × 2.1 mm, isolation voltage of 2500 Vrms, forward voltage around 1.1 V, reverse voltage of 6 V, collector current up to 40 mA, and operation from –55 °C to +100 °C. The device is UL and BSI approved and is supplied in tape‑and‑reel formats.
| Package size (L × W × H) | 4.6 mm × 2.5 mm × 2.1 mm |
|---|---|
| Current Transfer Ratio (CTR) typical | 200 % @ IF=1 mA, VCE=5 V |
| Isolation voltage (BV) | 2500 Vrms |
| Forward voltage (VF) typical | 1.1 V |
| Reverse voltage (VR) | 6 V |
| Collector current (IC) | 40 mA |
| Power dissipation (PD) typical | 60 mW |
| Operating temperature range | -55 °C to +100 °C |
| Storage temperature range | -55 °C to +150 °C |
The PS2911-1 has a typical CTR of 200 % when driven at 1 mA forward current and 5 V collector‑emitter voltage.
It is UL approved (File No. E72422) and BSI approved (No. 8657, 8658).
The flat‑lead package reduces the mounting area by about 30 % compared with the PS28xx series.
The package measures 4.6 mm length, 2.5 mm width, and 2.1 mm height.