OPB991L55 Equivalent & Substitute Parts

Part Overview

The OPB991L55 is an optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor operates at 0.125" (3.18mm) sensing distance with NPN open collector output configuration and wire lead packaging. The OPB991L55 is classified as obsolete product status. Due to its obsolete classification, equivalent substitute parts from the active OPB991 series are available to maintain design continuity and ensure supply chain availability.

Substiute Parts

OPB991L55

TT Electronics/Optek TechnologyIn Stock: 968OPB991L55 Datasheet

Current PartRFQ

OPB991L55Z

TT Electronics/Optek TechnologyIn Stock: 1232OPB991L55Z Datasheet

DirectRFQ

OPB991L11Z

TT Electronics/Optek TechnologyIn Stock: 1005OPB991L11Z Datasheet

MFR RecommendedRFQ

OPB991L51Z

TT Electronics/Optek TechnologyIn Stock: 2335OPB991L51Z Datasheet

MFR RecommendedRFQ

OPB991P11Z

TT Electronics/Optek TechnologyIn Stock: 1072OPB991P11Z Datasheet

MFR RecommendedRFQ

OPB991P51Z

TT Electronics/Optek TechnologyIn Stock: 1759OPB991P51Z Datasheet

MFR RecommendedRFQ

OPB991T11Z

TT Electronics/Optek TechnologyIn Stock: 2692OPB991T11Z Datasheet

MFR RecommendedRFQ

OPB991T51Z

TT Electronics/Optek TechnologyIn Stock: 5301OPB991T51Z Datasheet

MFR RecommendedRFQ

OPB991T55Z

TT Electronics/Optek TechnologyIn Stock: 4563OPB991T55Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPB991L55 are determined by electrical and mechanical parameter equivalence within the OPB991 base product family. All substitute candidates maintain identical specifications across the following critical parameters:

• Sensing Distance: 0.125" (3.18mm)
• Sensing Method: Through-Beam
• Output Configuration: NPN - Open Collector, Buffer
• Voltage Supply Range: 4.5V ~ 16V
• Current Supply: 12 mA
• Response Time: 70ns
• Operating Temperature Range: -40°C ~ 70°C
• Mounting Type: Chassis Mount
• Package / Case: Module, Wire Leads

Substitute parts differ only in packaging configuration (Bulk packaging with "Z" suffix designation) and product status (Active vs. Obsolete). All substitute parts are manufactured by TT Electronics/Optek Technology and comply with ROHS3 and REACH requirements.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the OPB991L55. The primary distinction between the obsolete OPB991L55 and active substitute parts is regulatory compliance status and product lifecycle classification.

The OPB991L55 carries RoHS non-compliant status, while all substitute parts (OPB991L55Z, OPB991L11Z, OPB991L51Z, OPB991P11Z, OPB991P51Z, OPB991T11Z, OPB991T51Z, OPB991T55Z) are ROHS3 compliant and REACH unaffected. All substitute parts are classified as Active product status, ensuring continued manufacturer support and supply availability.

For new designs or component replacement requiring regulatory compliance, OPB991T51Z offers the highest inventory availability (5218 units) among active substitutes. OPB991L55Z provides the closest part number alignment to the original OPB991L55 with active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can OPB991L55 be directly replaced with OPB991L55Z?

A: Yes. OPB991L55Z is electrically and mechanically equivalent to OPB991L55. The primary difference is packaging designation (Bulk) and product status (Active vs. Obsolete). OPB991L55Z is ROHS3 compliant, whereas OPB991L55 is RoHS non-compliant.

Q: What determines compatibility between OPB991L55 and other substitute parts?

A: Compatibility is determined by matching electrical parameters (voltage supply, current supply, response time, output configuration) and mechanical parameters (sensing distance, sensing method, mounting type, package type). All listed substitutes maintain identical specifications across these parameters.

Q: Are there differences in sensing performance between substitute parts?

A: No. All substitute parts share identical sensing distance (0.125" / 3.18mm), sensing method (Through-Beam), response time (70ns), and operating temperature range (-40°C ~ 70°C).

Q: Why do substitute part numbers contain different letter designations (L, P, T)?

A: Letter designations in the OPB991 series indicate internal design variations within the base product family. All variants listed maintain identical electrical and mechanical specifications relevant to substitution compatibility.

Q: Is bulk packaging compatible with original wire lead packaging?

A: Yes. The "Z" suffix indicates Bulk packaging configuration, but the underlying Module, Wire Leads package type remains consistent across all parts. Wire lead connections and mounting interfaces are identical.

Q: What is the compliance difference between OPB991L55 and substitute parts?

A: OPB991L55 is RoHS non-compliant. All substitute parts are ROHS3 compliant and REACH unaffected. For applications requiring regulatory compliance, any active substitute part is appropriate.