LTR-536AD Equivalent & Substitute Parts

Part Overview

The LTR-536AD is an optical sensor photodiode manufactured by Lite-On Inc., designed for 900nm wavelength detection applications. This component features a 50ns response time and operates across the industrial temperature range of -40°C to 85°C. The device is housed in a radial, side-view package suitable for through-hole mounting. As an active product with full RoHS3 compliance and REACH unaffected status, the LTR-536AD remains in production. Substitute parts are identified when equivalent optical sensing performance is required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

LTR-536AD

Lite-On Inc.In Stock: 12069LTR-536AD Datasheet

Current PartRFQ

QSE773

Fairchild SemiconductorIn Stock: 124202QSE773 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LTR-536AD are identified based on the following critical parameters that determine functional equivalence:

• Optical Wavelength Sensitivity: 900nm detection capability
• Photodiode Type: PIN photodiode architecture
• Response Time: 50ns or faster performance
• Reverse Voltage Rating: 30V or higher
• Dark Current: 30nA or lower
• Operating Temperature Range: -40°C to 85°C or broader
• Regulatory Compliance: RoHS3 compliance and REACH unaffected status
• Mounting Configuration: Through-hole compatible packages

The QSE773 qualifies as a substitute based on its PIN photodiode architecture and active product status with equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the LTR-536AD and QSE773 maintain active product status with identical export classification (EAR99). The LTR-536AD is the primary specification component with full parameter documentation. The QSE773 serves as an alternative when supply availability of the primary part is constrained. Selection between these components should be based on:

• Availability and lead time requirements
• Packaging format compatibility with assembly processes
• Specific application wavelength sensitivity requirements
• Inventory management and procurement strategy

Both components meet regulatory requirements for RoHS3 compliance and REACH unaffected status, making them suitable for applications requiring environmental compliance certification.

Frequently Asked Questions (FAQ)

Q: What makes the QSE773 a valid substitute for the LTR-536AD?

A: The QSE773 is classified as a substitute based on its PIN photodiode architecture and active product status. Both components share equivalent regulatory compliance (EAR99 classification) and are suitable for 900nm optical sensing applications.

Q: Are there packaging differences between the main part and substitute?

A: Yes. The LTR-536AD is specified in radial, side-view through-hole packaging, while the QSE773 is supplied in bulk packaging. Design integration and PCB layout compatibility must be verified before substitution.

Q: Can the QSE773 replace the LTR-536AD in existing designs without modification?

A: Substitution requires verification of package compatibility, pin configuration, and mounting requirements. While both are PIN photodiodes, physical form factor differences may necessitate circuit board redesign or adapter solutions.

Q: What compliance certifications apply to both parts?

A: Both the LTR-536AD and QSE773 carry EAR99 export classification. The LTR-536AD is explicitly RoHS3 compliant and REACH unaffected. Compliance documentation for the QSE773 should be verified through the manufacturer.

Q: How should I select between the main part and substitute?

A: Use the LTR-536AD as the primary specification. Select the QSE773 only when the primary part is unavailable and packaging/mounting requirements can be accommodated in your application.