1458 | Optocoupler Datasheet

to protect internal components from moisture and environmental contaminants. 2. Pin Configuration (SOP-8) While you should always verify with a specific manufacturer's PDF

Here is the technical content for a . Since "1458" is not a standard industry part number for an optocoupler (it is typically associated with the dual operational amplifier), this datasheet assumes the 1458 refers to a general-purpose phototransistor optocoupler (similar to a 4N35 or PC817 but with a unique in-house marking). For actual use, please verify the manufacturer (e.g., Siemens, Vishay, or a Chinese brand). 1458 optocoupler datasheet

The 1458 optocoupler provides an efficient, space-saving solution for dual-channel electrical isolation challenges. Offering high common-mode transient immunity, predictable current transfer ratios, and a compact 8-pin footprint, it bridges the gap between basic slow-speed optocouplers and expensive high-speed digital isolators. Since "1458" is not a standard industry part

Note: If your chip has 6 pins (like a 4N35), Pins 3, 4, 5, and 6 correspond to the Base, Collector, and Emitter. Always check the physical datasheet if possible. Offering high common-mode transient immunity

If you are working on a specific layout, please share the and output load characteristics so I can calculate the precise resistor values for your design. Share public link

In this setup, when the Arduino sends a HIGH signal, the internal LED lights up. The phototransistor detects this light and closes the circuit, allowing the 12V current to flow through the relay. The Arduino remains electrically isolated from the 12V circuit.