QRB1133 Equivalent & Substitute Parts

Part Overview

The QRB1133 is a reflective optical sensor manufactured by onsemi, designed as a 0.150" (3.81mm) module with pre-wired chassis mount configuration. This component functions as a phototransistor-based optical sensor for reflective sensing applications. The QRB1133 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

QRB1133

onsemiIn Stock: 1159QRB1133 Datasheet

Current PartRFQ

OPB704

TT Electronics / Optek TechnologyIn Stock: 1755OPB704 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QRB1133 is determined by alignment across the following critical parameters:

• Sensing Distance: 0.150" (3.81mm) nominal range for reflective detection
• Sensing Method: Reflective optical sensing technology
• Output Type: Phototransistor configuration
• Electrical Ratings: Collector-emitter breakdown voltage of 30 V and collector current capacity
• Moisture Sensitivity: MSL 1 classification for unlimited moisture exposure tolerance

The OPB704 meets these substitution criteria with a sensing distance of 0.149" (3.8mm), reflective sensing method, and phototransistor output. Both components operate within compatible electrical parameters and share identical moisture sensitivity classification.

Parameter Comparison

Engineering Selection Recommendations

The OPB704 serves as a functional equivalent for the obsolete QRB1133 based on matching optical and electrical specifications. Both components share identical sensing distance tolerance, reflective sensing methodology, phototransistor output configuration, and voltage ratings.

The primary design consideration is the mechanical interface difference: the QRB1133 uses chassis mount pre-wired configuration, while the OPB704 employs through-hole PCB mount packaging. System integration requires accommodation of this mounting type change.

The OPB704 maintains active product status with current manufacturing availability, providing supply chain continuity for applications previously using the QRB1133. Both components carry identical REACH compliance and moisture sensitivity classifications, supporting regulatory consistency.

Frequently Asked Questions (FAQ)

Q: Can the OPB704 directly replace the QRB1133 without circuit modification?

A: Electrical compatibility is established through matching voltage ratings (30 V collector-emitter breakdown) and phototransistor output type. However, the mechanical interface differs: QRB1133 is pre-wired chassis mount while OPB704 is through-hole PCB mount. Physical integration requires appropriate mounting adaptation.

Q: What is the sensing distance tolerance between these components?

A: The QRB1133 specifies 0.150" (3.81mm) and the OPB704 specifies 0.149" (3.8mm). This 0.001" difference is within typical manufacturing tolerance for reflective optical sensors and does not affect functional equivalence for standard sensing applications.

Q: Are there differences in collector current ratings?

A: The OPB704 is rated for 25 mA maximum collector current compared to the QRB1133 at 20 mA. The OPB704 provides higher current capacity. The QRB1133 specifies 50 mA maximum DC forward current versus 40 mA for the OPB704. Circuit design must account for these individual parameter differences.

Q: What compliance certifications apply to both components?

A: Both the QRB1133 and OPB704 carry REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity classification, ensuring equivalent regulatory compliance for applications requiring these certifications.

Q: Why is the QRB1133 listed as obsolete?

A: The QRB1133 is no longer manufactured by onsemi. The OPB704 remains in active production, providing continued availability for reflective optical sensing applications requiring equivalent specifications.