HOA6971-T51 Equivalent & Substitute Parts

Part Overview

The HOA6971-T51 is an optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for through-beam sensing applications with a 0.125" (3.18mm) sensing distance and PCB mount configuration. This component features NPN open collector output with buffer capability, operating across a 4.5V to 12V supply range with a 70ns response time.

The HOA6971-T51 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this sensor architecture.

Substiute Parts

HOA6971-T51

Honeywell Sensing and Productivity SolutionsIn Stock: 1126HOA6971-T51 Datasheet

Current PartRFQ

OPB961T51

TT Electronics/Optek TechnologyIn Stock: 20180OPB961T51 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HOA6971-T51 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
• Environmental Compliance: RoHS compliance and MSL rating

The OPB961T51 meets all critical electrical and mechanical parameters required for direct substitution. Voltage supply range differences are noted but do not preclude functional equivalence within overlapping operational windows.

Parameter Comparison

Engineering Selection Recommendations

OPB961T51 as Primary Substitute

The OPB961T51 is the qualified substitute for the obsolete HOA6971-T51. Selection rationale is based on the following engineering factors:

• Functional Equivalence: Identical sensing distance, through-beam method, output configuration, supply current, response time, and operating temperature range
• Product Status: OPB961T51 maintains active production status, ensuring long-term supply chain availability
• Compliance: Both components meet RoHS requirements; OPB961T51 carries ROHS3 compliance certification and REACH unaffected status
• Electrical Compatibility: The OPB961T51 voltage supply range (4.75V ~ 5.25V) is a subset of the HOA6971-T51 range (4.5V ~ 12V), ensuring compatibility in applications operating within the 4.75V ~ 5.25V window
• Mechanical Compatibility: Identical PCB mount through-hole packaging and MSL rating (1 - Unlimited) ensure direct board-level substitution

Frequently Asked Questions (FAQ)

Q: Can the OPB961T51 directly replace the HOA6971-T51 in existing designs?

A: Yes, the OPB961T51 provides direct functional replacement. Both components share identical sensing distance (0.125"), sensing method (through-beam), output configuration (NPN open collector with buffer), supply current (15 mA), response time (70ns), operating temperature range (-40°C ~ 70°C), and PCB mount packaging. Designs operating within the 4.75V ~ 5.25V supply voltage range experience no functional differences.

Q: What is the voltage supply range difference between these parts?

A: The HOA6971-T51 operates across 4.5V ~ 12V, while the OPB961T51 operates across 4.75V ~ 5.25V. Applications requiring supply voltages below 4.75V or above 5.25V cannot use the OPB961T51. Applications operating within the 4.75V ~ 5.25V overlap window are fully compatible.

Q: Are there packaging or form factor differences?

A: No. Both components use identical through-hole PCB mount packaging with MSL rating 1 (Unlimited). Board-level integration requires no design modifications.

Q: What is the product status difference?

A: The HOA6971-T51 is obsolete and no longer manufactured. The OPB961T51 is in active production, providing assured long-term availability for new designs and production continuity.

Q: Are both components RoHS compliant?

A: Yes. The HOA6971-T51 is RoHS compliant. The OPB961T51 is ROHS3 compliant and REACH unaffected, meeting current environmental regulations.