The MCA230/ MCA231/ MCA255 are industry standard optocouplers, consisting of a gallium arsenide infrared LED and a silicon photodarlington.
The Vishay MCA230, MCA231 and MCA255 are high‑gain optocouplers with a photodarlington output. They feature a 7.5 kV withstand capability, isolation test voltage of 5300 VRMS, and fast switching times (rise 10 µs, fall 35 µs). The devices are offered in DIP‑6 and SMD‑6 packages and meet UL, CSA and IEC approvals.
The datasheet provides absolute maximum ratings, typical electrical parameters, current transfer ratios, switching characteristics, and mechanical dimensions. It also includes Vishay’s ozone‑depleting substances policy and contact information for the manufacturer. This manual is written in Chinese.
| Isolation test voltage | 5300 VRMS |
|---|---|
| Coupling capacitance | 0.5 pF |
| Fast rise time | 10 µs |
| Fast fall time | 35 µs |
| Reverse voltage (VR) | 6.0 V |
| Forward continuous current (IF) | 60 mA |
| Power dissipation (Pdiss) | 135 mW |
| Emitter‑collector breakdown voltage (BVECO) | 7.0 V |
| Storage temperature range | -55 °C to +150 °C |
| Operating temperature range | -55 °C to +150 °C |
| Isolation resistance | 10¹² Ω |
| Reverse current (IR) at VR=3 V | 10 µA |
The isolation test voltage is 5300 VRMS.
The devices can be stored from –55 °C to +150 °C.
The MCA231 has a CTR greater than 200 %.