OPB981P55Z Equivalent & Substitute Parts

Part Overview

The OPB981P55Z is a through-beam optical sensor module manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This 0.125" (3.18mm) sensing distance sensor features NPN open collector output with buffer configuration and wire lead connectivity for chassis mount applications. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for seamless system integration.

Substiute Parts

OPB981P55Z

TT Electronics/Optek TechnologyIn Stock: 1216OPB981P55Z Datasheet

Current PartRFQ

OPB931W51Z

TT Electronics/Optek TechnologyIn Stock: 1143OPB931W51Z Datasheet

MFR RecommendedRFQ

OPB931W55Z

TT Electronics/Optek TechnologyIn Stock: 1501OPB931W55Z Datasheet

MFR RecommendedRFQ

OPB941W51Z

TT Electronics/Optek TechnologyIn Stock: 6980OPB941W51Z Datasheet

MFR RecommendedRFQ

OPB941W55Z

TT Electronics/Optek TechnologyIn Stock: 792OPB941W55Z Datasheet

MFR RecommendedRFQ

OPB981L11Z

TT Electronics/Optek TechnologyIn Stock: 1234OPB981L11Z Datasheet

MFR RecommendedRFQ

OPB981L51Z

TT Electronics/Optek TechnologyIn Stock: 1884OPB981L51Z Datasheet

MFR RecommendedRFQ

OPB981L55Z

TT Electronics/Optek TechnologyIn Stock: 661OPB981L55Z Datasheet

MFR RecommendedRFQ

OPB981P11Z

TT Electronics/Optek TechnologyIn Stock: 1132OPB981P11Z Datasheet

MFR RecommendedRFQ

OPB981T11Z

TT Electronics/Optek TechnologyIn Stock: 850OPB981T11Z Datasheet

MFR RecommendedRFQ

OPB981T51Z

TT Electronics/Optek TechnologyIn Stock: 1556OPB981T51Z Datasheet

MFR RecommendedRFQ

OPB981T55Z

TT Electronics/Optek TechnologyIn Stock: 986OPB981T55Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPB981P55Z is determined by strict equivalence across the following critical parameters:

• Sensing Distance: 0.125" (3.18mm)
• Sensing Method: Through-Beam
• Output Configuration: NPN - Open Collector, Buffer
• Mounting Type: Chassis Mount
• Voltage Supply Range: 4.75V ~ 5.25V
• Current Supply: 15 mA
• Response Time: 70ns
• Operating Temperature Range: -40°C ~ 70°C
• Package Type: Module, Wire Leads
• RoHS Compliance: ROHS3 Compliant

All substitute parts listed maintain identical specifications across these parameters. The primary distinction between substitute options lies in product status (active vs. obsolete) and packaging configuration (bulk vs. other formats). Substitutes are drawn from the OPB931 and OPB941 base product families within the Photologic® series, all manufactured by TT Electronics/Optek Technology.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the OPB981P55Z. The primary selection criterion is product status: all substitute options are classified as active, whereas the OPB981P55Z is obsolete. This distinction ensures long-term availability and continued manufacturer support for replacement units.

All substitute parts carry ROHS3 compliance certification, matching the original part's environmental regulatory status. Inventory availability varies across substitute options, with OPB941W51Z offering the highest stock level at 6965 units, followed by OPB931W55Z at 1456 units. For applications requiring immediate procurement, these options provide superior supply chain positioning.

The OPB931 and OPB941 base product families represent the active product lines within the Photologic® series that maintain the specified 0.125" (3.18mm) through-beam sensing configuration with NPN open collector output. Selection between these families and the OPB981 active variants depends on supply chain availability and procurement lead time requirements.

Frequently Asked Questions (FAQ)

Q: Can OPB981P55Z be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts maintain identical electrical specifications (4.75V ~ 5.25V supply, 15 mA current, 70ns response time), mechanical configuration (chassis mount, wire leads), sensing characteristics (0.125" through-beam), and output type (NPN open collector buffer). Direct pin-for-pin and functional replacement is supported.

Q: What is the difference between OPB931, OPB941, and OPB981 base product families?

A: All three families are part of the Photologic® series manufactured by TT Electronics/Optek Technology and share identical electrical and mechanical specifications for the 0.125" (3.18mm) through-beam configuration. The primary distinction is product lifecycle status: OPB931 and OPB941 are active product lines, while OPB981 includes both active and obsolete variants.

Q: Does packaging format affect electrical compatibility?

A: No. The packaging designation (bulk vs. other formats) does not affect electrical or mechanical compatibility. All substitute parts are supplied in bulk packaging and maintain the Module, Wire Leads case type specified for the original part.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the environmental regulatory status of the OPB981P55Z.

Q: Which substitute offers the best inventory availability?

A: OPB941W51Z provides the highest current stock level at 6965 units, followed by OPB931W55Z at 1456 units. Both options support immediate procurement requirements.

Q: Can I use OPB981 active variants as substitutes for the obsolete OPB981P55Z?

A: Yes. Active OPB981 variants (OPB981L11Z, OPB981L51Z, OPB981L55Z, OPB981P11Z, OPB981T11Z, OPB981T51Z) maintain identical specifications and support direct replacement. These options preserve the original base product family while ensuring continued availability.