OPB771N Equivalent & Substitute Parts

Part Overview

The OPB771N is a reflective optical sensor manufactured by TT Electronics/Optek Technology, part of the Photologic® series. This component functions as an infrared reflective sensor with NPN open collector output, designed for detecting objects at distances between 0.080" and 0.220" (2.03mm to 5.59mm) using Kodak® paper as the sensing medium.

The OPB771N is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for new designs or replacement applications where this sensor is specified.

Substiute Parts

OPB771N

TT Electronics/Optek TechnologyIn Stock: 696OPB771N Datasheet

Current PartRFQ

OPB771TZ

TT Electronics/Optek TechnologyIn Stock: 982OPB771TZ Datasheet

MFR RecommendedRFQ

OPB771TZ

TT Electronics/Optek TechnologyIn Stock: 982OPB771TZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OPB771N is determined by the following critical parameters:

• Sensing distance range: 0.080" ~ 0.220" (2.03mm ~ 5.59mm)
• Sensing method: Reflective
• Sensing object: Kodak® Paper
• Output configuration: NPN - Open Collector
• Sensing light: Infrared
• Supply current: 10 mA
• Supply voltage: 4.75V ~ 5.25V

The OPB771TZ qualifies as a direct substitute because it maintains identical electrical characteristics, sensing parameters, and functional specifications. The primary differences are product status (active versus obsolete) and mounting type (chassis mount versus through hole), along with improved RoHS compliance in the substitute part.

Parameter Comparison

Engineering Selection Recommendations

The OPB771TZ is the direct substitute for the OPB771N. Selection of the OPB771TZ is supported by the following factors:

• Identical electrical and optical specifications ensure functional compatibility
• Active product status guarantees continued availability and supply chain reliability
• ROHS3 compliance of the OPB771TZ meets current regulatory requirements, whereas the OPB771N does not
• Both parts share the same base product number (OPB771) and series designation

The mounting type difference (through hole for OPB771N versus chassis mount for OPB771TZ) must be evaluated against specific application requirements. Circuit board layout and mechanical integration considerations should guide the final selection.

Frequently Asked Questions (FAQ)

Q: Can the OPB771TZ directly replace the OPB771N in existing designs?

A: The OPB771TZ maintains identical electrical and optical specifications, including sensing distance, output configuration, supply voltage, and current requirements. Compatibility depends on mechanical mounting requirements. If the original design uses through-hole mounting, the chassis mount configuration of the OPB771TZ requires mechanical redesign.

Q: What is the primary reason to substitute the OPB771N?

A: The OPB771N is classified as obsolete. The OPB771TZ is an active product with guaranteed availability and supply continuity.

Q: Are there compliance differences between these parts?

A: Yes. The OPB771N is RoHS non-compliant, while the OPB771TZ is ROHS3 compliant. For applications subject to RoHS regulations, the OPB771TZ is the required choice.

Q: Do both parts operate at the same voltage and current levels?

A: Yes. Both the OPB771N and OPB771TZ operate at 4.75V to 5.25V supply voltage and draw 10 mA supply current.

Q: What sensing objects are compatible with these sensors?

A: Both parts are designed to sense Kodak® paper at reflective distances between 0.080" and 0.220" (2.03mm to 5.59mm).