HOA0902-012 Equivalent & Substitute Parts

Part Overview

The HOA0902-012 is a through-beam optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for PCB mount applications with a 3.2mm (0.126") sensing distance. This component features NPN open collector output configuration and operates within a 4.5V to 5.5V supply voltage range. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

HOA0902-012

Honeywell Sensing and Productivity SolutionsIn Stock: 9891HOA0902-012 Datasheet

Current PartRFQ

OPB961T51

TT Electronics/Optek TechnologyIn Stock: 20180OPB961T51 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HOA0902-012 is determined by alignment across the following critical parameters:

Sensing Distance Compatibility: The HOA0902-012 operates at 0.126" (3.2mm). Substitute components must maintain equivalent sensing distance within acceptable mechanical tolerances for the application.

Sensing Method: Through-beam optical sensing is the functional requirement. Substitute parts must employ identical sensing methodology.

Output Configuration: NPN open collector output is mandatory for circuit compatibility. Substitute parts must support this output type.

Mounting Type: Through-hole PCB mount is required for mechanical fit and assembly compatibility.

Voltage Supply Range: The 4.5V to 5.5V supply specification defines the electrical operating envelope. Substitute parts must operate within overlapping or compatible voltage ranges.

Operating Temperature Range: The -40°C to 70°C specification establishes environmental operating limits that substitute parts must meet or exceed.

The OPB961T51 from TT Electronics/Optek Technology satisfies these substitution criteria through equivalent sensing distance (0.125" / 3.18mm), identical through-beam sensing method, compatible NPN open collector output with buffer capability, matching through-hole PCB mount configuration, overlapping voltage supply range (4.75V ~ 5.25V), and identical operating temperature range (-40°C ~ 70°C).

Parameter Comparison

Engineering Selection Recommendations

The OPB961T51 serves as the primary substitute for the obsolete HOA0902-012. Selection of this substitute is supported by the following engineering factors:

Product Status: The HOA0902-012 is classified as obsolete, whereas the OPB961T51 maintains active product status with current manufacturing and supply chain availability.

Compliance Certifications: Both components maintain RoHS compliance. The OPB961T51 carries ROHS3 certification, representing current regulatory alignment. Both components are classified under identical ECCN (EAR99) and HTSUS (8541.49.8000) codes.

Functional Equivalence: Sensing distance variance between 3.2mm and 3.18mm falls within standard mechanical tolerances for through-beam optical sensor applications. The output configuration of the OPB961T51 includes buffer capability in addition to open collector output, providing enhanced circuit compatibility without reducing functionality.

Supply Voltage Overlap: The OPB961T51 voltage range (4.75V ~ 5.25V) overlaps substantially with the HOA0902-012 specification (4.5V ~ 5.5V), ensuring compatibility in standard 5V supply applications.

Current Consumption: The OPB961T51 requires 15 mA compared to the HOA0902-012 specification of 12 mA. This 3 mA increase must be evaluated within the context of the specific power supply design.

Frequently Asked Questions (FAQ)

Q: Can the OPB961T51 directly replace the HOA0902-012 in existing PCB designs?

A: The OPB961T51 is mechanically and functionally compatible as a through-hole PCB mount component. The sensing distance difference of 0.002" (0.02mm) is negligible for standard through-beam optical sensor applications. Verification of voltage supply capability (4.75V minimum vs. 4.5V minimum) and current capacity (15 mA vs. 12 mA) within the specific circuit design is required.

Q: What is the significance of the buffer output in the OPB961T51?

A: The OPB961T51 provides both NPN open collector and buffer output configurations. The buffer output offers improved signal integrity and drive capability compared to open collector alone, enhancing compatibility with various downstream circuit topologies without compromising open collector functionality.

Q: Are there mechanical differences between the HOA0902-012 and OPB961T51 packages?

A: Both components are specified as through-hole PCB mount packages. Mechanical compatibility requires verification of pin pitch, lead diameter, and package outline dimensions against the specific PCB design. The sensing distance specifications (3.2mm vs. 3.18mm) represent optical performance parameters rather than package dimensions.

Q: How does the supply voltage range difference affect substitution?

A: The OPB961T51 operates within 4.75V to 5.25V, while the HOA0902-012 operates within 4.5V to 5.5V. The OPB961T51 range is narrower but overlaps the standard 5V operating point. Applications requiring operation below 4.75V or above 5.25V must evaluate the specific supply voltage stability of the system.

Q: What is the inventory status for these components?

A: The HOA0902-012 shows 9,880 pieces in stock as new original inventory. The OPB961T51 shows 20,099 pieces in stock as new original inventory. Availability of the substitute component is substantially higher, supporting long-term supply chain continuity.