OPI125TX

Overview

The OPI125TX is a high-reliability optically coupled isolator manufactured by TT Electronics/Optek Technology. It features a gallium aluminum arsenide infrared LED emitter paired with a push-pull output stage, providing a 15 kV isolation voltage rating. The device utilizes a radial-5 lead package designed for through-hole mounting. Key electrical specifications include a maximum propagation delay of 5 ns for both low-to-high and high-to-low transitions. This component is classified as obsolete within the manufacturer's portfolio.

Feature Summary

• Push-pull output architecture for enhanced signal integrity
• High isolation voltage capability of 15 kV
• Radial-5 lead axial/radial package configuration

Applications

• Industrial control systems requiring galvanic isolation
• Aerospace and defense electronic assemblies
• High-speed digital signal transmission interfaces

Procurement Notes

Verify current availability status as the component is listed as obsolete. Confirm RoHS compliance requirements against project specifications, noting non-compliant status in some records. Validate supplier authenticity and check for alternative sourcing channels or qualified substitutes due to discontinuation. Ensure packaging type matches design constraints.

Selection Notes

Select this component only if legacy compatibility or specific 15 kV isolation performance is required. Evaluate the radial-5 lead form factor against PCB layout constraints. Consider the 5 ns propagation delay for timing-sensitive applications. Assess end-of-life implications for long-term production support and supply chain stability before finalizing the design.

Part Context

This part belongs to the OPI series of high-reliability optoelectronics from Optek Technology, now part of TT Electronics. The series targets demanding industrial, aerospace, and defense sectors. These components are engineered for extreme performance and often undergo rigorous screening processes such as MIL-STD-750 testing for critical applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct replacements may require redesigning the isolation interface or sourcing surplus inventory. Consult manufacturer notifications for potential last-time buy options.