OP552C Phototransistor 935nm Side View Radial Equivalent & Substitute Parts

Part Overview

The OP552C is a 935nm phototransistor manufactured by TT Electronics/Optek Technology, designed for side view radial through-hole applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The OP552C operates within a 30V collector-emitter breakdown voltage specification with a maximum dark current of 100nA and 100mW power dissipation capability.

Substiute Parts

OP552C

TT Electronics/Optek TechnologyIn Stock: 1115OP552C Datasheet

Current PartRFQ

PT908-7B-F

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

MFR RecommendedRFQ

PT908-7B-F

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the OP552C is determined by the following critical parameters:

• Wavelength Compatibility: The substitute must operate within the near-infrared spectrum suitable for 935nm applications. The PT908-7B-F operates at 940nm, representing a 5nm variance within acceptable tolerance for most infrared sensing applications.
• Voltage Rating: Collector-emitter breakdown voltage must meet or exceed 30V to ensure safe operation within the original circuit design.
• Dark Current Specification: Maximum dark current of 100nA establishes the baseline leakage current performance required for low-light detection accuracy.
• Mechanical Compatibility: Through-hole mounting with side view orientation and radial package configuration ensures direct physical and electrical compatibility with existing PCB layouts.
• Regulatory Compliance: ROHS3 compliance and MSL 1 rating confirm environmental and handling compatibility with modern manufacturing standards.

The PT908-7B-F from Everlight Electronics Co Ltd satisfies all substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The PT908-7B-F represents the primary substitute for OP552C applications based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance and identical MSL 1 ratings, ensuring compatibility with current manufacturing and environmental standards.

Product Status: The transition from obsolete OP552C to active PT908-7B-F status provides long-term supply chain stability and continued manufacturer support.

Electrical Equivalence: Matching voltage breakdown ratings (30V) and dark current specifications (100nA maximum) confirm functional equivalence for circuit operation. The 5nm wavelength difference (935nm to 940nm) remains within the operational tolerance of near-infrared sensing systems.

Physical Compatibility: Identical through-hole mounting, side view orientation, and radial package configuration enable direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can PT908-7B-F directly replace OP552C in existing designs? A: Yes. The PT908-7B-F maintains identical mechanical mounting, electrical voltage ratings, and dark current specifications. The 5nm wavelength variance (940nm vs 935nm) is operationally compatible with near-infrared sensing applications designed for the OP552C.

Q: What is the significance of the wavelength difference between 935nm and 940nm? A: The 5nm difference represents approximately 0.5% variance in the near-infrared spectrum. Both wavelengths operate within the same functional band for infrared detection and are interchangeable for most sensing applications without circuit modification.

Q: Why is OP552C classified as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. The PT908-7B-F, maintained as an active product by Everlight Electronics, provides continued availability and manufacturer support for equivalent functionality.

Q: Are there any packaging differences between OP552C and PT908-7B-F? A: Both components use radial through-hole packages with side view orientation. No packaging modifications are required for substitution.

Q: Do both components meet current environmental compliance standards? A: Yes. Both OP552C and PT908-7B-F are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, meeting modern manufacturing and environmental requirements.