OP500DA Equivalent & Substitute Parts

Part Overview

The OP500DA is a phototransistor optical sensor manufactured by TT Electronics/Optek Technology, designed for 935nm infrared detection in a surface mount 0805 (2012 Metric) package with top view orientation. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The OP500DA operates across a temperature range of -25°C to 85°C and is ROHS3 compliant.

Substiute Parts

OP500DA

TT Electronics/Optek TechnologyIn Stock: 994OP500DA Datasheet

Current PartRFQ

PT17-21B/L41/TR8

Everlight Electronics Co LtdIn Stock: 54633PT17-21B/L41/TR8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OP500DA is determined by the following critical parameters:

Package Compatibility: The substitute must use 0805 (2012 Metric) surface mount package with top view orientation to ensure mechanical and electrical compatibility with existing PCB layouts.

Wavelength Tolerance: The OP500DA operates at 935nm. The substitute PT17-21B/L41/TR8 operates at 940nm, representing a 5nm variance within the near-infrared spectrum. Both wavelengths fall within the standard infrared detection range for phototransistor applications and maintain functional equivalence for typical optical sensing circuits.

Electrical Parameters: Substitute parts must maintain compatibility across voltage breakdown ratings, collector current capacity, dark current specifications, and power dissipation limits. The PT17-21B/L41/TR8 demonstrates lower maximum ratings in certain parameters (30V breakdown vs. 35V; 20mA collector current vs. 32mA; 75mW power vs. 100mW), requiring circuit-level verification that the application does not exceed these reduced limits.

Environmental & Compliance: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 ECCN classification. Operating temperature ranges are identical (-25°C to 85°C).

Parameter Comparison

Engineering Selection Recommendations

The PT17-21B/L41/TR8 from Everlight Electronics Co Ltd is the identified substitute for the obsolete OP500DA. Selection of this substitute is supported by the following factors:

Product Status: The PT17-21B/L41/TR8 maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete OP500DA.

Compliance Alignment: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent component substitution.

Package & Mechanical Compatibility: Identical 0805 (2012 Metric) surface mount package with top view orientation ensures direct PCB layout compatibility without redesign.

Electrical Parameter Consideration: The PT17-21B/L41/TR8 exhibits lower maximum ratings for voltage breakdown (30V vs. 35V), collector current (20mA vs. 32mA), and power dissipation (75mW vs. 100mW). Circuit designs must operate within these reduced limits to ensure reliable performance.

Wavelength Variance: The 5nm difference between 935nm and 940nm operates within the near-infrared detection spectrum and maintains functional equivalence for standard phototransistor applications.

Moisture Sensitivity: The PT17-21B/L41/TR8 carries MSL rating 3 (168 hours) compared to MSL rating 2 (1 year) for the OP500DA, requiring stricter moisture control during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the PT17-21B/L41/TR8 be used as a direct replacement for the OP500DA without circuit modification?

A: Direct substitution is possible if the circuit design operates within the PT17-21B/L41/TR8 electrical limits. The lower maximum ratings for voltage breakdown (30V), collector current (20mA), and power dissipation (75mW) must not be exceeded. If the original design approaches or exceeds these limits, circuit modification is required.

Q: What is the significance of the 5nm wavelength difference between 935nm and 940nm?

A: Both wavelengths operate within the near-infrared spectrum used for standard phototransistor optical sensing applications. The 5nm variance is within typical infrared detector tolerance and maintains functional equivalence for most applications. Application-specific spectral filtering requirements should be evaluated independently.

Q: Are the packages physically identical?

A: Yes. Both the OP500DA and PT17-21B/L41/TR8 use the 0805 (2012 Metric) surface mount package with top view orientation, enabling direct PCB footprint compatibility.

Q: What does the difference in MSL ratings mean for component handling?

A: The OP500DA carries MSL rating 2 (1 year floor life), while the PT17-21B/L41/TR8 carries MSL rating 3 (168 hours floor life). MSL rating 3 requires stricter moisture control. Components must be stored in dry conditions and used within 168 hours of bag opening. Baking may be required if floor life is exceeded.

Q: Is the PT17-21B/L41/TR8 available in the same packaging format?

A: The PT17-21B/L41/TR8 is supplied in Tape & Reel (TR) format, while the OP500DA packaging format is not specified in the provided data. Verify packaging requirements for your procurement and assembly processes.

Q: Do both components meet the same regulatory standards?

A: Yes. Both the OP500DA and PT17-21B/L41/TR8 are ROHS3 compliant, REACH unaffected, and carry identical EAR99 ECCN classification.