OP552A Equivalent & Substitute Parts

Part Overview

The OP552A is a 935nm phototransistor with side view radial packaging manufactured by TT Electronics/Optek Technology. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The OP552A operates as an optical sensor in the near-infrared spectrum and requires substitution for procurement and production continuity.

Substiute Parts

OP552A

TT Electronics/Optek TechnologyIn Stock: 1083OP552A Datasheet

Current PartRFQ

PT908-7B-F

Everlight Electronics Co LtdIn Stock: 5418PT908-7B-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the OP552A is determined by alignment across the following critical parameters:

Mechanical Compatibility:

• Mounting Type: Through Hole
• Orientation: Side View
• Package / Case: Radial configuration

Electrical Compatibility:

• Voltage - Collector Emitter Breakdown (Max): 30 V
• Current - Dark (Id) (Max): 100 nA
• Wavelength: 935nm to 940nm (near-infrared spectrum, functionally equivalent for most applications)

Regulatory & Environmental:

• RoHS3 Compliance
• MSL 1 (Unlimited moisture sensitivity)
• REACH Unaffected status

The PT908-7B-F meets all mechanical and electrical compatibility criteria, with wavelength operating at 940nm, which falls within the acceptable near-infrared detection range for phototransistor applications requiring 935nm sensitivity.

Parameter Comparison

Engineering Selection Recommendations

The PT908-7B-F is the designated manufacturer-recommended substitute for the obsolete OP552A. Selection of this alternative is supported by:

• Identical mechanical form factor (Through Hole, Side View, Radial package)
• Matching electrical specifications (30 V breakdown voltage, 100 nA dark current)
• Equivalent regulatory compliance (ROHS3, REACH Unaffected, MSL 1)
• Active product status ensuring ongoing availability and supply chain continuity
• Wavelength compatibility within the near-infrared detection spectrum (940nm vs. 935nm)

Frequently Asked Questions (FAQ)

Q: Can PT908-7B-F be used as a direct replacement for OP552A in existing designs?

A: Yes. The PT908-7B-F matches the OP552A across all critical mechanical and electrical parameters. The 5nm wavelength difference (940nm vs. 935nm) remains within the functional operating range for near-infrared phototransistor applications.

Q: Are there any package or pinout differences between OP552A and PT908-7B-F?

A: No. Both components use identical Through Hole, Side View, Radial packaging, ensuring direct PCB compatibility without layout modifications.

Q: What is the compliance status of the PT908-7B-F?

A: The PT908-7B-F is ROHS3 compliant, REACH unaffected, and carries MSL 1 (Unlimited) moisture sensitivity rating, matching the OP552A specifications.

Q: Why is the OP552A listed as obsolete?

A: The OP552A has been discontinued by TT Electronics/Optek Technology. The PT908-7B-F represents the active, in-stock alternative for procurement and production use.

Q: Are there electrical performance differences in dark current or breakdown voltage?

A: No. Both components specify identical maximum dark current (100 nA) and collector-emitter breakdown voltage (30 V).