OPB911L55 Equivalent & Substitute Parts

Part Overview

The OPB911L55 is an optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This through-beam optical sensor features a 0.375" (9.53mm) PCB mount configuration with NPN open collector buffer output. The component is actively produced and stocked, with 759 units available in inventory. Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

OPB911L55

TT Electronics/Optek TechnologyIn Stock: 866OPB911L55 Datasheet

Current PartRFQ

OPB901L55

TT Electronics/Optek TechnologyIn Stock: 2516OPB901L55 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the OPB911L55 are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Identical sensing distance: 0.375" (9.53mm)
• Identical sensing method: Through-Beam
• Identical output configuration: NPN - Open Collector, Buffer
• Identical mounting type: Through Hole
• Identical supply voltage range: 4.75V ~ 5.25V
• Identical supply current: 15 mA
• Identical response time: 70ns
• Identical operating temperature range: -40°C ~ 85°C
• Identical package type: PCB Mount
• Identical RoHS compliance status: ROHS3 Compliant
• Identical MSL rating: 1 (Unlimited)

The OPB901L55 meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the OPB911L55 and OPB901L55 are active products from TT Electronics/Optek Technology with identical electrical and mechanical specifications. Selection between these parts should be based on inventory availability and lead time requirements. The OPB901L55 offers higher stock levels (2465 units) compared to the OPB911L55 (759 units), making it suitable for applications where supply chain continuity is a priority. Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage conditions. No functional differences exist between these components for applications requiring the specified electrical parameters and through-hole PCB mount configuration.

Frequently Asked Questions (FAQ)

Q: Can OPB901L55 be used as a direct replacement for OPB911L55?

A: Yes. Both parts share identical electrical specifications, sensing distance, output configuration, and mounting type. No circuit modifications are required for substitution.

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

A: No. Both parts have identical response time (70ns), sensing distance (0.375"), and through-beam sensing method.

Q: Do both parts require the same supply voltage?

A: Yes. Both parts operate within the identical supply voltage range of 4.75V ~ 5.25V and draw 15 mA current.

Q: Are there packaging or storage differences?

A: No. Both parts have identical MSL Level 1 rating and PCB mount package type, requiring no special storage or handling procedures.

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory and lead time availability. Both parts are active products with identical specifications and compliance certifications.