HOA0871-T55 Equivalent & Substitute Parts

Part Overview

The HOA0871-T55 is an optical sensor manufactured by Honeywell Sensing and Productivity Solutions, classified as a through-beam transistor optical sensor designed for PCB mounting applications. This component features a 0.125" (3.18mm) sensing distance and is configured for slot-type optical detection with transistor output.

The HOA0871-T55 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, support legacy system repairs, and ensure component availability for ongoing production or maintenance requirements.

Substiute Parts

HOA0871-T55

Honeywell Sensing and Productivity SolutionsIn Stock: 1132HOA0871-T55 Datasheet

Current PartRFQ

OPB866T51

onsemiIn Stock: 867OPB866T51 Datasheet

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OPB871T55

TT Electronics/Optek TechnologyIn Stock: 1022OPB871T55 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HOA0871-T55 is determined by alignment across the following critical parameters:

Primary Substitution Criteria:

• Sensing Distance: 0.125" (3.18mm)
• Sensing Method: Through-Beam
• Output Configuration: Transistor or Phototransistor
• Mounting Type: Through Hole
• Package / Case: PCB Mount
• Current - Collector (Ic) (Max): 30 mA
• Voltage - Collector Emitter Breakdown (Max): 30 V
• Operating Temperature Range: -40°C ~ 85°C
• Type: Unamplified

Identified Substitute Parts:

1. OPB871T55 (TT Electronics/Optek Technology) – Direct functional equivalent with identical sensing distance, through-beam method, phototransistor output, and electrical specifications. Active product status with ROHS3 compliance.

2. OPB866T51 (onsemi) – Slot-type optical sensor with through-hole mounting and phototransistor output. Shares core sensing methodology and package configuration. Obsolete status with RoHS non-compliance noted.

Parameter Comparison

Engineering Selection Recommendations

OPB871T55 (Primary Substitute): OPB871T55 is the preferred substitute for HOA0871-T55 applications. This part maintains identical electrical specifications (30 mA collector current maximum, 30 V collector-emitter breakdown voltage, 50 mA forward current maximum) and identical operating temperature range (-40°C ~ 85°C). Both components feature 0.125" (3.18mm) through-beam sensing distance with PCB mount through-hole configuration. OPB871T55 holds active product status and carries ROHS3 compliance certification, providing superior long-term availability and regulatory alignment compared to the obsolete HOA0871-T55.

OPB866T51 (Secondary Substitute): OPB866T51 is a secondary substitute option. While it shares the through-hole mounting type, phototransistor output configuration, and identical MSL rating, it differs in package configuration (Module, PC Pins, Slot Type versus PCB Mount) and carries RoHS non-compliance status. This part is also obsolete. OPB866T51 is suitable only when PCB layout constraints permit the alternative package form factor and when RoHS compliance is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can OPB871T55 directly replace HOA0871-T55 in existing PCB designs?

A: OPB871T55 is electrically and mechanically compatible with HOA0871-T55 for applications requiring identical sensing distance (0.125" / 3.18mm), through-beam detection, and collector current specifications (30 mA maximum). Both components feature through-hole PCB mount packaging. Physical footprint verification is required before implementation.

Q: What is the difference between transistor and phototransistor output configurations?

A: Both HOA0871-T55 (transistor) and OPB871T55 (phototransistor) are unamplified optical sensors with identical electrical ratings. The terminology reflects internal design differences, but both deliver equivalent functional performance in through-beam sensing applications with the specified current and voltage parameters.

Q: Why is OPB866T51 listed as a secondary substitute despite being obsolete?

A: OPB866T51 is included because it shares core functional characteristics (through-hole mounting, phototransistor output, slot-type optical sensing). However, its obsolete status, RoHS non-compliance, and different package configuration (Module, PC Pins, Slot Type) make it less suitable than OPB871T55 for new designs or compliance-critical applications.

Q: Are there electrical parameter differences between the substitute parts?

A: OPB871T55 matches all specified electrical parameters of HOA0871-T55 (30 mA collector current maximum, 30 V breakdown voltage, 50 mA forward current, -40°C ~ 85°C operating range). OPB866T51 does not provide complete electrical specification data in the available documentation.

Q: What compliance certifications should be considered when selecting a substitute?

A: HOA0871-T55 carries RoHS Compliant status. OPB871T55 carries ROHS3 Compliant status, providing enhanced regulatory alignment. OPB866T51 is RoHS non-compliant and should not be used in applications requiring RoHS certification. All three parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Q: Does sensing distance remain constant across all substitute options?

A: HOA0871-T55 and OPB871T55 both specify 0.125" (3.18mm) sensing distance. OPB866T51 does not provide sensing distance specification in available documentation. Sensing distance is a critical parameter for optical sensor substitution and must be verified before implementation.