OPL550-OCA Equivalent & Substitute Parts

Part Overview

The OPL550-OCA is an optical sensor manufactured by TT Electronics/Optek Technology, designed as a Photologic® series photo detector with logic output capabilities. This component operates at 935nm wavelength and features an open collector output configuration in a side view package. The part is currently active in production with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Finding equivalent or substitute parts may be necessary due to inventory constraints, supply chain considerations, or application-specific requirements for alternative wavelength or output configurations.

Substiute Parts

OPL550-OCA

TT Electronics/Optek TechnologyIn Stock: 1495OPL550-OCA Datasheet

Current PartRFQ

QSE159

onsemiIn Stock: 1149QSE159 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPL550-OCA is determined by the following critical parameters:

• Wavelength Compatibility: The primary operating wavelength (935nm for OPL550-OCA) must be compatible with the application's optical requirements. Substitute parts may operate at different wavelengths (such as 880nm) depending on system design.
• Output Configuration: The output type (open collector vs. open collector inverter) must match application logic requirements.
• Package Type: The physical package format (side view) must be compatible with the PCB layout and mechanical constraints.
• Operating Temperature Range: The temperature specification (-40°C ~ 85°C) must support the intended application environment.
• Compliance Standards: RoHS3 compliance and REACH status must align with regulatory requirements.

The QSE159 from onsemi is identified as a manufacturer-recommended substitute, operating at 880nm with an open collector inverter output in a 3-SIP side view package, maintaining the same operating temperature range and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Selection between OPL550-OCA and QSE159 must be based on the following engineering criteria:

OPL550-OCA is the primary choice when:

• The application requires 935nm wavelength operation
• Standard open collector output logic is required without inversion
• TT Electronics/Optek Technology component qualification is specified

QSE159 is applicable when:

• The application can accommodate 880nm wavelength operation
• Inverted logic output (open collector inverter) is compatible with system design
• onsemi component qualification is acceptable
• Both parts maintain identical operating temperature ranges (-40°C ~ 85°C) and full regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification)

Both components are active production parts with unlimited moisture sensitivity (MSL 1), ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can QSE159 directly replace OPL550-OCA in my circuit?

A: Direct replacement requires verification of two factors: (1) the application's compatibility with 880nm wavelength instead of 935nm, and (2) the system's ability to accommodate inverted logic output instead of standard open collector output. Electrical interface compatibility must be confirmed before substitution.

Q: What is the primary difference between these two optical sensors?

A: The main differences are wavelength (935nm vs. 880nm) and output logic configuration (open collector vs. open collector inverter). Both maintain identical operating temperature ranges and regulatory compliance status.

Q: Are both parts RoHS compliant?

A: Yes. Both OPL550-OCA and QSE159 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What does "open collector inverter" mean in the QSE159 specification?

A: The open collector inverter output inverts the logic state compared to a standard open collector output. This means the output signal polarity is reversed, which must be accounted for in circuit design.

Q: Are the package dimensions compatible between OPL550-OCA and QSE159?

A: Both use side view packages. OPL550-OCA uses a standard side view package, while QSE159 uses a 3-SIP side view package. Physical dimensions and pinout must be verified against datasheets for PCB layout compatibility.

Q: What is the operating temperature range for both parts?

A: Both OPL550-OCA and QSE159 operate across -40°C to 85°C, supporting industrial and commercial temperature environments.