AC/DC input flexibility and CTR range
The CEL PS2915-1-F3-AX is a single-channel optoisolator that accepts both AC and DC input on the LED side, making it suitable for line-voltage sensing, AC mains zero-cross detection, and bidirectional signal isolation. The transistor output is rated for 40 V maximum and 40 mA per channel, with a typical Vce saturation of 300 mV. The current transfer ratio spans 100% to 400% at a forward current of 1 mA, which gives the designer a predictable LED drive current range for logic-level translation.
Isolation and temperature rating
With 2500 Vrms isolation, this part covers basic isolation requirements for industrial control interfaces, PLC I/O modules, and motor drive feedback paths. Rise and fall times are 5 µs and 10 µs typical, with turn-on and turn-off times of 40 µs and 120 µs — adequate for 10 kHz to low-kHz switching signals, not high-speed digital isolation.
Package and mounting
Housed in a 4-SMD flat-lead package (supplier device package 4-Mini-Flat), the PS2915-1-F3-AX is a surface-mount device intended for automated assembly. The flat-lead form factor keeps the profile low for dense PCB layouts.