Standard models offer around 1500V to 5300Vrms isolation.
An Arduino (5V logic) needs to switch a 120VAC lamp via a TRIAC. Solution: Use the optocoupler (e.g., MOC3021 – a special TRIAC driver) to bridge the gap. The 1458 is not here; you'd use a dedicated "random phase" optotriac. For DC loads, the 4N35 works perfectly. 1458 optocoupler datasheet
): Operates within a range of , making it compatible with standard TTL and CMOS logic levels. Standard models offer around 1500V to 5300Vrms isolation