OPB993P51 Equivalent & Substitute Parts

Part Overview

The OPB993P51 is an optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor features a 0.125" (3.18mm) sensing distance with NPN open collector inverted output configuration and wire lead packaging for chassis mount applications. The OPB993P51 is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible through-beam optical sensing functionality.

Substiute Parts

OPB993P51

TT Electronics/Optek TechnologyIn Stock: 1075OPB993P51 Datasheet

Current PartRFQ

OPB993P51Z

TT Electronics/Optek TechnologyIn Stock: 836OPB993P51Z Datasheet

DirectRFQ

OPB933W51Z

TT Electronics/Optek TechnologyIn Stock: 3561OPB933W51Z Datasheet

MFR RecommendedRFQ

OPB933W55Z

TT Electronics/Optek TechnologyIn Stock: 1260OPB933W55Z Datasheet

MFR RecommendedRFQ

OPB943W51Z

TT Electronics/Optek TechnologyIn Stock: 1290OPB943W51Z Datasheet

MFR RecommendedRFQ

OPB983L11Z

TT Electronics/Optek TechnologyIn Stock: 909OPB983L11Z Datasheet

MFR RecommendedRFQ

OPB983L51Z

TT Electronics / Optek TechnologyIn Stock: 1963OPB983L51Z Datasheet

MFR RecommendedRFQ

OPB983P11Z

TT Electronics/Optek TechnologyIn Stock: 1065OPB983P11Z Datasheet

MFR RecommendedRFQ

OPB983P51Z

TT Electronics / Optek TechnologyIn Stock: 2214OPB983P51Z Datasheet

MFR RecommendedRFQ

OPB983T51Z

TT Electronics/Optek TechnologyIn Stock: 20258OPB983T51Z Datasheet

MFR RecommendedRFQ

OPB993L11Z

TT Electronics/Optek TechnologyIn Stock: 1792OPB993L11Z Datasheet

MFR RecommendedRFQ

OPB993L55Z

TT Electronics/Optek TechnologyIn Stock: 774OPB993L55Z Datasheet

MFR RecommendedRFQ

OPB993T51Z

TT Electronics / Optek TechnologyIn Stock: 1498OPB993T51Z Datasheet

MFR RecommendedRFQ

OPB993T55Z

TT Electronics/Optek TechnologyIn Stock: 1161OPB993T55Z Datasheet

MFR RecommendedRFQ

OPB983T55Z

TT Electronics/Optek TechnologyIn Stock: 1045OPB983T55Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OPB993P51 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, Inverted
• 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 / Case: Module, Wire Leads
• Manufacturer: TT Electronics/Optek Technology
• Series: Photologic®

All substitute parts listed maintain identical electrical and mechanical specifications across these parameters. Substitution is based on product availability, compliance status, and packaging configuration (bulk vs. other formats). The OPB993P51 is obsolete; active alternatives from the same manufacturer series provide direct functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the OPB993P51. Selection among active alternatives should prioritize the following factors:

Compliance Status: All substitute parts are ROHS3 compliant, whereas the original OPB993P51 is RoHS non-compliant. For new designs and systems requiring regulatory compliance, any active substitute part satisfies current environmental standards.

Product Status: The OPB993P51 is obsolete. All substitute parts listed carry active product status, ensuring long-term availability and continued manufacturer support.

Inventory Availability: OPB983T51Z offers the highest inventory level at 20,199 units, followed by OPB933W51Z at 3,489 units. These options provide superior supply chain security for high-volume applications.

Base Product Series: Substitutes are available across three base product families within the Photologic® series: OPB933, OPB943, OPB983, and OPB993. All maintain identical functional parameters and are interchangeable at the system level.

Frequently Asked Questions (FAQ)

Q: Can OPB993P51 be directly replaced with OPB993P51Z?

A: Yes. OPB993P51Z is the direct active equivalent of the obsolete OPB993P51. Both share identical electrical specifications, sensing distance, output configuration, and mounting characteristics. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What distinguishes the OPB933, OPB943, and OPB983 series from OPB993?

A: Within the Photologic® series, all listed parts maintain identical electrical and mechanical parameters for sensing distance, output configuration, supply voltage, current draw, response time, and operating temperature. Differences exist only in base product designation and internal design variants, which do not affect functional equivalence in through-beam optical sensing applications.

Q: Are all substitute parts available in bulk packaging?

A: Yes. All substitute parts listed are supplied in bulk packaging format, suitable for production and integration environments.

Q: Does RoHS3 compliance affect electrical performance?

A: No. ROHS3 compliance reflects material composition and environmental standards compliance only. Electrical performance, sensing distance, output characteristics, and response time remain identical across all listed parts regardless of RoHS status.

Q: Which substitute part offers the best supply chain availability?

A: OPB983T51Z provides the highest inventory level at 20,199 units in stock, followed by OPB933W51Z at 3,489 units. Both options ensure reliable long-term availability for production applications.

Q: Can substitute parts be mixed within a single system?

A: Yes. All substitute parts are functionally equivalent and maintain identical electrical specifications. System designs may incorporate any combination of listed parts without performance degradation or compatibility issues.