HOA6971-T55 Equivalent & Substitute Parts

Part Overview

The HOA6971-T55 is an optical through-beam sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for PCB mount applications with a 0.125" (3.18mm) sensing distance. This component features NPN open collector output with buffer configuration and operates across a 4.5V to 12V supply range.

The HOA6971-T55 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this sensor architecture.

Substiute Parts

HOA6971-T55

Honeywell Sensing and Productivity SolutionsIn Stock: 1171HOA6971-T55 Datasheet

Current PartRFQ

OPB971N51

TT Electronics/Optek TechnologyIn Stock: 3220OPB971N51 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HOA6971-T55 are identified based on strict equivalence across the following critical parameters:

• Sensing Distance: 0.125" (3.18mm) through-beam configuration
• Output Configuration: NPN open collector with buffer output
• Mounting Type: Through hole PCB mount
• Supply Current: 15 mA
• Response Time: 70ns
• Operating Temperature Range: -40°C ~ 70°C
• Package Type: PCB mount form factor

The OPB971N51 manufactured by TT Electronics/Optek Technology meets all these core electrical and mechanical specifications. This part maintains functional and physical compatibility with the original HOA6971-T55 design.

Parameter Comparison

Engineering Selection Recommendations

The OPB971N51 serves as a direct functional substitute for the obsolete HOA6971-T55 based on matching electrical specifications and physical form factor. Both components are RoHS compliant and maintain identical sensing distance, output configuration, response time, and operating temperature range.

The OPB971N51 is currently in active production status with 3200 units available in inventory, providing supply chain continuity for applications previously designed around the HOA6971-T55.

One design consideration: the OPB971N51 operates within a narrower supply voltage range (4.75V ~ 5.25V) compared to the HOA6971-T55 (4.5V ~ 12V). Applications requiring operation at the extended voltage extremes of the original part must evaluate circuit design compatibility with the substitute's voltage specification.

Frequently Asked Questions (FAQ)

Q: Can the OPB971N51 be used as a direct replacement for the HOA6971-T55 in existing PCB designs?

A: Yes. Both components share identical sensing distance (0.125"), output configuration (NPN open collector with buffer), mounting type (through hole PCB mount), supply current (15 mA), response time (70ns), and operating temperature range (-40°C ~ 70°C). Physical and electrical compatibility is established across these core parameters.

Q: What is the primary difference between these two parts?

A: The OPB971N51 operates within a narrower supply voltage range (4.75V ~ 5.25V) versus the HOA6971-T55 (4.5V ~ 12V). Applications operating at voltage extremes outside the 4.75V ~ 5.25V window must evaluate circuit compatibility before substitution.

Q: Why is the HOA6971-T55 listed as obsolete?

A: The HOA6971-T55 has been discontinued by Honeywell. The OPB971N51 remains in active production and provides equivalent functionality for new designs and legacy system support.

Q: Are both parts RoHS compliant?

A: Yes. The HOA6971-T55 is RoHS Compliant, and the OPB971N51 is ROHS3 Compliant. Both meet environmental compliance requirements.

Q: What is the packaging difference between these parts?

A: The HOA6971-T55 packaging is listed as standard, while the OPB971N51 is supplied in bulk packaging. Both maintain the same PCB mount form factor and through-hole mounting configuration.