OPI211

Overview

The OPI211 is a single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features an infrared emitting diode coupled to a phototransistor within a plastic dual-in-line package. The device provides electrical isolation between input and output circuits, with a collector-emitter breakdown voltage of 60 V minimum. It supports a maximum forward current of 50 mA for the emitter and offers a nominal current transfer ratio ranging from 60% to 600%. The component is designed for through-hole mounting and operates within a temperature range of -55°C to 125°C.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits
• Integrates an infrared LED emitter with a phototransistor sensor
• Delivers high current transfer ratio for efficient signal transmission
• Constructed in a standard plastic dual-in-line package for reliable mounting

Applications

• Industrial control systems requiring circuit isolation
• Signal switching applications in electronic devices
• Power supply feedback loops for voltage regulation
• General-purpose logic interface circuits

Procurement Notes

Verify the specific suffix code on the component marking to confirm exact pin configuration and packaging variant, as suffixes may indicate differences in lead finish or reel type. Confirm RoHS compliance status for the specific batch if required by project specifications. Ensure the operating temperature range aligns with the environmental conditions of the final assembly. Cross-reference the manufacturer's latest datasheet for any recent design changes or recommended soldering profiles.

Selection Notes

Select this component when a robust, high-gain isolation solution is needed for low-speed digital signals. The wide current transfer ratio range accommodates various drive conditions without requiring precise biasing. Consider the package size constraints and thermal dissipation requirements of the application. Verify that the isolation voltage rating meets the safety standards of the target equipment. Compare against alternative optocouplers if faster response times are necessary.

Part Context

The OPI211 belongs to the family of transistor output optocouplers produced by TT Electronics/Optek Technology. These components are widely used in applications demanding reliable galvanic isolation. The product line includes various configurations with different current transfer ratios and package styles. This specific model represents a standard offering for general-purpose isolation tasks in industrial and consumer electronics.

Replacement Considerations

OP133W

FAQ

What is the maximum collector-emitter breakdown voltage?

The collector-emitter breakdown voltage is a minimum of 60 V.

Does the OPI211 include internal amplification?

No, it utilizes a direct phototransistor output without internal amplification.