OPB745W Equivalent & Substitute Parts

Part Overview

The OPB745W is a reflective optical sensor manufactured by TT Electronics/Optek Technology, designed for 0.150" (3.81mm) sensing distance applications with chassis mount configuration. This component features a photodarlington output type and operates across a temperature range of -40°C to 80°C. The OPB745W is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

OPB745W

TT Electronics/Optek TechnologyIn Stock: 725OPB745W Datasheet

Current PartRFQ

OPB745WZ

TT Electronics/Optek TechnologyIn Stock: 2036OPB745WZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OPB745W is determined by strict equivalence across the following critical parameters:

• Sensing distance: 0.150" (3.81mm)
• Sensing method: Reflective
• Output type: Photodarlington
• Voltage rating: 15 V maximum collector-emitter breakdown
• Current rating: 40 mA maximum DC forward current
• Mounting configuration: Chassis Mount
• Package type: Module, Pre-Wired
• Operating temperature range: -40°C to 80°C

The OPB745WZ qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters specified above. The primary distinction between these components is product status and packaging configuration, not functional or electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The OPB745WZ is the direct substitute for the obsolete OPB745W. Both components share identical electrical specifications, sensing characteristics, and mechanical form factors. The OPB745WZ maintains active product status with manufacturer support and availability. Additionally, the OPB745WZ meets ROHS3 compliance requirements, providing regulatory advantage for new designs and systems subject to environmental standards. The transition from OPB745W to OPB745WZ requires no circuit modifications or design changes, as all functional parameters remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can OPB745WZ directly replace OPB745W in existing designs? A: Yes. The OPB745WZ is electrically and mechanically equivalent to the OPB745W. No circuit modifications are required for substitution.

Q: What is the primary difference between OPB745W and OPB745WZ? A: The OPB745W is obsolete, while OPB745WZ is an active product. OPB745WZ also meets ROHS3 compliance standards. All electrical and mechanical specifications are identical.

Q: Are the sensing characteristics identical between these parts? A: Yes. Both components feature 0.150" (3.81mm) reflective sensing distance, photodarlington output type, and identical voltage and current ratings.

Q: Does packaging differ between OPB745W and OPB745WZ? A: OPB745W is supplied in standard packaging, while OPB745WZ is supplied in bulk packaging. Both are pre-wired modules with identical form factors.

Q: What is the operating temperature range for both components? A: Both OPB745W and OPB745WZ operate across -40°C to 80°C.

Q: Is RoHS compliance a factor in selecting between these parts? A: OPB745W is RoHS non-compliant, while OPB745WZ meets ROHS3 compliance. For applications subject to environmental regulations, OPB745WZ is the appropriate selection.