OPF397A Equivalent & Substitute Parts

Part Overview

The OPF397A is a fiber optic transmitter operating at 850nm wavelength with ST connector interface, manufactured by TT Electronics/Optek Technology. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement.

The OPF397A is designed for applications requiring 850nm fiber optic transmission with forward voltage of 2V and maximum forward current of 100 mA. Due to its obsolete status, the OPF694-2 has been identified as a direct substitute to maintain system compatibility and ensure continued availability of replacement components.

Substiute Parts

OPF397A

TT Electronics/Optek TechnologyIn Stock: 1073OPF397A Datasheet

Current PartRFQ

OPF694-2

TT Electronics/Optek TechnologyIn Stock: 1156OPF694-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The OPF694-2 qualifies as a direct substitute for the OPF397A based on the following critical parameters:

• Wavelength: Both parts operate at 850nm
• Spectral Bandwidth: Both parts maintain 35nm spectral bandwidth
• Maximum Forward Current: Both parts rated at 100 mA maximum
• Reverse Voltage Rating: Both parts rated at 1 V maximum
• Connector Type: Both parts use ST connector interface
• Compliance Standards: Both parts are ROHS3 compliant and REACH unaffected

The OPF694-2 represents an active product with enhanced specifications, specifically a maximum forward voltage of 2.1V compared to the OPF397A's typical 2V, providing improved operational margin while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The OPF694-2 is the appropriate substitute for the OPF397A based on the following factors:

Electrical Compatibility: The OPF694-2 maintains identical wavelength (850nm), spectral bandwidth (35nm), maximum forward current (100 mA), and reverse voltage rating (1 V). The forward voltage specification of 2.1V maximum on the OPF694-2 is compatible with the OPF397A's 2V typical rating, providing operational margin within standard circuit design tolerances.

Mechanical Compatibility: Both parts feature ST connector interface, ensuring direct mechanical compatibility in existing fiber optic installations.

Compliance and Regulatory Status: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements for electronic component procurement and deployment.

Product Availability: The OPF694-2 is classified as active product status with confirmed inventory availability (1101 pcs), whereas the OPF397A is obsolete. This substitution ensures long-term component availability for system maintenance and production requirements.

Frequently Asked Questions (FAQ)

Q: Can the OPF694-2 directly replace the OPF397A in existing designs?

A: Yes. The OPF694-2 provides direct substitution based on identical wavelength, spectral bandwidth, maximum forward current, reverse voltage rating, and ST connector interface. Both parts maintain equivalent electrical and mechanical specifications required for 850nm fiber optic transmission applications.

Q: What is the difference in forward voltage specification between these parts?

A: The OPF397A specifies 2V typical forward voltage, while the OPF694-2 specifies 2.1V maximum forward voltage. This difference represents a specification refinement rather than a functional incompatibility. The OPF694-2's maximum rating encompasses the OPF397A's typical operating point, ensuring compatibility in existing circuit designs.

Q: Are there packaging differences between the OPF397A and OPF694-2?

A: The OPF397A is supplied in standard packaging, while the OPF694-2 is supplied in tray packaging. Both parts maintain identical TO18 form factor and ST connector interface. Packaging differences do not affect electrical or mechanical compatibility.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both the OPF397A and OPF694-2 are ROHS3 compliant and REACH unaffected, satisfying current regulatory standards for electronic component procurement and deployment.

Q: Why should I transition from OPF397A to OPF694-2?

A: The OPF397A is classified as obsolete product status. The OPF694-2 is an active product with confirmed long-term availability. Transitioning to the OPF694-2 ensures continued access to replacement components and eliminates supply chain risk associated with obsolete parts.