The ACPL-217-500E is a DC-input single channel half-pitch phototransistor optocoupler which contains a light emitting diode optically coupled to a phototransistor. It is packaged in a 4-pin SO package. The input-output isolation voltage is rated at 3000 Vrms. Response time, tr, is 2μs typically, while minimum CTR is 50% at input current of 5 mA.

Features
Current transfer ratio
(CTR: min. 50% at IF = 5mA, VCC = 5V)
High input-output isolation voltage
(VISO = 3,000VRMS)
Non-saturated Response time
(tr: typ. 2μs at VCC = 10V, IC = 2mA, RL= 100Ω)
SO package
CMR 10 kV/μs (typical)
Options available are:
5XXE = Lead Free Option
Applications
I/O Interface for Programmable controllers, computers
Sequence controllers
System appliances, measuring instruments
Signal transmission between circuits of different potentials and impedances