OPB709 Equivalent & Substitute Parts

Part Overview

The OPB709 is a reflective optical sensor manufactured by TT Electronics/Optek Technology, designed for 0.150" (3.81mm) PCB mount applications. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The OPB709 operates as a photodarlington output device with a maximum collector-emitter breakdown voltage of 15V and forward current rating of 40mA.

Substiute Parts

OPB709

TT Electronics/Optek TechnologyIn Stock: 844OPB709 Datasheet

Current PartRFQ

OPB708

TT Electronics/Optek TechnologyIn Stock: 1423OPB708 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The OPB708 qualifies as a direct substitute for the OPB709 based on the following critical parameters:

Matching Parameters:

• Sensing distance: 0.150" (3.81mm)
• Sensing method: Reflective
• Mounting type: Through Hole
• Package / Case: PCB Mount
• Operating temperature range: -40°C to 85°C
• Current - DC Forward (If) (Max): 40mA
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Differing Parameters:

• Output Type: OPB708 is a Phototransistor (vs. OPB709 Photodarlington)
• Voltage - Collector Emitter Breakdown (Max): OPB708 rated at 30V (vs. OPB709 at 15V)
• Product Status: OPB708 is Active (vs. OPB709 Obsolete)

The OPB708 provides enhanced voltage rating capability while maintaining functional equivalence in sensing distance, method, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

The OPB708 is the designated manufacturer-recommended substitute for the obsolete OPB709. Both components maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental consistency. The OPB708's active product status provides assured long-term availability and supply chain continuity. The increased collector-emitter breakdown voltage rating of 30V in the OPB708 provides additional design margin compared to the OPB709's 15V specification. Both devices share identical sensing distance, sensing method, mounting configuration, and current ratings, establishing functional equivalence for reflective optical sensing applications requiring 0.150" (3.81mm) PCB mount integration.

Frequently Asked Questions (FAQ)

Q: Can the OPB708 directly replace the OPB709 in existing designs? A: The OPB708 is functionally equivalent to the OPB709 for reflective optical sensing at 0.150" (3.81mm) sensing distance. Both components share identical mounting type, package configuration, operating temperature range, and current ratings. The OPB708 provides a higher collector-emitter breakdown voltage rating (30V vs. 15V), which represents an improvement in voltage margin.

Q: What is the primary difference between the OPB709 and OPB708? A: The OPB709 uses photodarlington output architecture, while the OPB708 uses phototransistor output architecture. The OPB708 also provides a higher maximum collector-emitter breakdown voltage (30V vs. 15V). Both devices maintain identical sensing distance, sensing method, and mounting specifications.

Q: Why is the OPB709 classified as obsolete? A: The OPB709 has been discontinued by the manufacturer. The OPB708 is the active equivalent part recommended for new designs and production applications.

Q: Are there packaging differences between OPB709 and OPB708? A: Both components use identical PCB mount through-hole packaging and are suitable for the same mechanical integration requirements.

Q: Do both parts meet the same compliance standards? A: Yes. Both the OPB709 and OPB708 are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring equivalent regulatory and environmental compliance.