HOA6990-L51 Equivalent & Substitute Parts

Part Overview

The HOA6990-L51 is an optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed as a through-beam optical sensor with a 0.125" (3.18mm) sensing distance. The device features wire leads for direct integration into chassis-mounted applications and operates with totem pole buffer output configuration.

The HOA6990-L51 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

HOA6990-L51

Honeywell Sensing and Productivity SolutionsIn Stock: 1148HOA6990-L51 Datasheet

Current PartRFQ

OPB990L51Z

TT Electronics/Optek TechnologyIn Stock: 3136OPB990L51Z Datasheet

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OPB990T55Z

TT Electronics/Optek TechnologyIn Stock: 5138OPB990T55Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HOA6990-L51 are identified based on strict equivalence of the following critical parameters:

• Sensing Distance: 0.125" (3.18mm) — determines optical alignment and detection range
• Sensing Method: Through-Beam — defines the optical detection principle
• Output Configuration: Totem Pole, Buffer — ensures electrical compatibility with existing circuits
• Mounting Type: Chassis Mount — confirms mechanical fit and installation compatibility
• Current Supply: 15 mA — establishes power consumption requirements
• Response Time: 70ns — defines switching speed performance
• Operating Temperature Range: -40°C ~ 70°C — confirms thermal operating envelope
• Package / Case: Module, Wire Leads — ensures physical and electrical interface compatibility

The substitute parts OPB990L51Z and OPB990T55Z, manufactured by TT Electronics/Optek Technology, meet all these critical parameters. Both parts are active products with enhanced compliance certifications and confirmed inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both OPB990L51Z and OPB990T55Z are functionally equivalent substitutes for the obsolete HOA6990-L51 based on matching electrical and mechanical parameters.

OPB990L51Z and OPB990T55Z are active products manufactured by TT Electronics/Optek Technology under the Photologic® series. Both parts satisfy all critical functional requirements and maintain compliance with current regulatory standards (ROHS3 Compliant, REACH Unaffected, EAR99 classification).

The voltage supply range for the substitute parts (4.75V ~ 5.25V) is narrower than the original HOA6990-L51 (4.5V ~ 7V). Applications operating at the extremes of the original voltage range (below 4.75V or above 5.25V) require circuit verification before substitution.

Both substitute parts demonstrate superior supply chain availability compared to the obsolete original part, with OPB990T55Z offering the highest inventory level at 5028 units.

Frequently Asked Questions (FAQ)

Q: Can OPB990L51Z and OPB990T55Z be used interchangeably with HOA6990-L51?

A: Yes. Both parts meet all critical electrical and mechanical parameters: identical sensing distance (0.125"), sensing method (through-beam), output configuration (totem pole buffer), mounting type (chassis mount), current draw (15 mA), response time (70ns), and operating temperature range (-40°C ~ 70°C). Package configuration (module with wire leads) is identical.

Q: What is the difference between OPB990L51Z and OPB990T55Z?

A: Both parts are functionally equivalent with identical electrical specifications and performance characteristics. The difference in part number designation reflects internal manufacturing or packaging variations within the TT Electronics/Optek Technology product line. Selection between these two parts may be based on inventory availability or specific procurement requirements.

Q: Are there voltage supply compatibility concerns?

A: The substitute parts operate within 4.75V ~ 5.25V, which is narrower than the original HOA6990-L51 range of 4.5V ~ 7V. If your application supplies voltage outside the 4.75V ~ 5.25V window, verify circuit compatibility before implementation.

Q: Do the substitute parts maintain the same compliance certifications?

A: The substitute parts carry ROHS3 Compliant status (enhanced from the original RoHS Compliant designation), REACH Unaffected status, and identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications. Compliance requirements are maintained or improved.

Q: What is the moisture sensitivity level for substitute parts?

A: Both substitute parts maintain MSL 1 (Unlimited), identical to the original HOA6990-L51. This indicates no moisture sensitivity restrictions for storage or handling.

Q: Are the substitute parts currently available?

A: Yes. OPB990L51Z has 3116 units in stock, and OPB990T55Z has 5028 units in stock, both listed as new original inventory. The original HOA6990-L51, classified as obsolete, has limited availability at 1077 units.