QSE973 Equivalent & Substitute Parts

Part Overview

The QSE973 is a PIN photodiode optical sensor designed for 930nm wavelength detection with a 50ns response time. Manufactured by onsemi, this component features a 90° viewing angle and operates across the -40°C to 85°C temperature range. The QSE973 is classified as obsolete, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The component is packaged in TO-226-2 and TO-92-2 configurations suitable for through-hole mounting applications.

Substiute Parts

QSE973

onsemiIn Stock: 4279QSE973 Datasheet

Current PartRFQ

QSE773

Fairchild SemiconductorIn Stock: 124202QSE773 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QSE973 is based on matching the following critical parameters: 930nm wavelength detection capability, PIN diode architecture, 50ns response time performance, 32V maximum reverse voltage rating, and through-hole mounting configuration. The QSE773 qualifies as a direct substitute based on its PIN photodiode classification and compatibility with the same optical and electrical operating parameters. Both components share identical wavelength specifications and diode type, enabling functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The QSE773 manufactured by Fairchild Semiconductor serves as the direct substitute for the obsolete QSE973. Selection of the QSE773 is supported by its active product status, ensuring long-term availability and supply chain continuity. Both components maintain identical electrical and optical specifications, including 930nm wavelength response, 50ns response time, 32V reverse voltage rating, and 90° viewing angle. The QSE773 is available in bulk packaging with substantial inventory levels, facilitating production requirements. Both components carry EAR99 export classification, maintaining equivalent compliance status.

Frequently Asked Questions (FAQ)

Q: What makes the QSE773 a suitable substitute for the QSE973? A: The QSE773 matches all critical parameters of the QSE973: 930nm wavelength detection, PIN diode type, 50ns response time, 32V maximum reverse voltage, 90° viewing angle, and through-hole mounting configuration. Both components operate across the -40°C to 85°C temperature range.

Q: Are there packaging differences between the QSE973 and QSE773? A: The QSE973 is specified in TO-226-2 and TO-92-2 (TO-226AC) packages. The QSE773 is available in bulk packaging. Verify physical package dimensions and pin configurations with component datasheets to confirm mechanical compatibility in your specific application.

Q: What is the product status difference between these components? A: The QSE973 is classified as obsolete, while the QSE773 maintains active product status. This distinction ensures the QSE773 will remain available for future production and design iterations.

Q: Do both components share the same compliance certifications? A: Both the QSE973 and QSE773 carry EAR99 export classification and are REACH unaffected, maintaining equivalent regulatory compliance for international applications.

Q: Can the QSE773 be used as a direct replacement in existing QSE973 designs? A: Electrical and optical parameter compatibility is confirmed. Verify mechanical fit within your PCB layout, considering package type and pin spacing specifications from the respective component datasheets.