OPI110C

Overview

The OPI110C is a single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features an NPN phototransistor output and utilizes through-hole mounting in a TO-72-4 package. The device provides high isolation capability with a rated insulation voltage of 15,000 Vrms. Key electrical parameters include a minimum current transfer ratio of 100% at a forward current of 10 mA, a maximum collector-emitter voltage of 30 V, and a maximum collector current of 44 mA. The forward voltage is specified at 1.6 V, while the collector-emitter saturation voltage reaches a maximum of 400 mV. Additional specifications include a reverse voltage of 2 V, power dissipation of 100 mW, and a minimum operating temperature of -40°C.

Feature Summary

• Provides robust electrical isolation between input and output circuits via a 15,000 Vrms insulation rating.
• Delivers high signal transmission efficiency with a guaranteed minimum current transfer ratio of 100%.
• Features an NPN phototransistor output suitable for interfacing with digital logic and control systems.

Applications

• High-voltage isolation in industrial control systems
• Signal coupling in measurement and testing equipment
• Interface circuits for microprocessor-based systems requiring galvanic separation

Procurement Notes

Verify the specific suffix designation to ensure compatibility with required isolation standards and package configurations. Confirm that the 15,000 Vrms insulation rating meets the safety requirements of the target application environment. Cross-reference the NPN phototransistor output characteristics with the receiving circuit's input impedance and voltage levels to ensure proper signal switching performance.

Selection Notes

Select this component when high isolation voltage and superior current transfer efficiency are critical design constraints. The TO-72-4 through-hole package facilitates easy integration into legacy or high-reliability PCB layouts. Ensure the 30 V collector-emitter voltage limit aligns with the load requirements, as higher voltage applications may necessitate alternative devices within the manufacturer's portfolio.

Part Context

The OPI110C belongs to the Optek family of transistor output optocouplers designed for general-purpose isolation tasks. It shares architectural similarities with other axial leaded variants but is distinguished by its specific high-isolation rating and current transfer characteristics. This part represents a standard solution for applications demanding reliable signal transmission across potential barriers without active amplification.

Replacement Considerations

The OPI110A serves as a verified substitute within the same series, offering identical 15,000 VDC isolation and functional characteristics. Both components share the same axial package style and NPN output configuration, allowing for direct pin-compatible replacement in existing designs without circuit modification.