OPI1280-066

Overview

The OPI1280-066 is a fiber optic isolator manufactured by TT Electronics/Optek Technology. It features a side-looking transistor output configuration with a 66mm isolation distance. The device utilizes an NPN phototransistor output capable of handling a maximum collector-emitter voltage of 33V and a peak collector current of 360µA. Key electrical parameters include a minimum Current Transfer Ratio (CTR) of 10%, a forward voltage of 2.3V at a forward current of 20mA, and a power dissipation rating of 100mW. It offers a high insulation voltage of 15000 Vrms and operates within a temperature range of -20°C to +75°C.

Feature Summary

• Provides high-voltage isolation via a dedicated fiber optic link with a 66mm separation distance.
• Utilizes a side-looking optical geometry for specific alignment requirements in signal transmission.
• Delivers digital switching capability through an NPN phototransistor output stage.

Applications

• High-voltage noise isolation in industrial control systems
• Signal transmission across galvanic barriers in measurement equipment
• Isolation interfaces in medical instrumentation requiring strict safety standards

Procurement Notes

Verify the specific datasheet version when ordering, as component specifications may be subject to change notifications from the manufacturer. Confirm that the 66mm isolation distance and side-looking orientation meet the mechanical constraints of the target assembly. Ensure that the thermal management design accommodates the 100mW power dissipation limit within the specified operating temperature range of -20°C to +75°C.

Selection Notes

Select this component when a physical fiber optic link is required rather than a standard surface-mount optocoupler. The 66mm isolation distance provides significant creepage and clearance compared to typical integrated optoisolators. Consider the low output current capability (360µA) when designing the load circuit; it is suitable for logic-level signaling but not for driving high-current loads directly.

Part Context

This part belongs to the OPI series of fiber optic isolators from Optek Technology. Unlike conventional optocouplers that use internal light pipes, this device employs an external fiber optic connection. This architecture allows for extreme isolation voltages and immunity to electromagnetic interference over longer distances than standard packages permit.

Replacement Considerations

Direct replacements are limited due to the unique 66mm fiber optic form factor. Standard optocouplers cannot replicate the physical isolation distance. If space permits, other models in the OPI series with different lengths or output types may serve as alternatives, provided the isolation requirements remain consistent.