SDP8405-015 Equivalent & Substitute Parts

Part Overview

The SDP8405-015 is a phototransistor optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for 880nm wavelength detection with top view radial mounting. This component operates across an industrial temperature range of -40°C to 85°C and features a 20° viewing angle with 30V collector-emitter breakdown voltage rating.

The SDP8405-015 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this optical sensor technology.

Substiute Parts

SDP8405-015

Honeywell Sensing and Productivity SolutionsIn Stock: 795SDP8405-015 Datasheet

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OP505A

TT Electronics / Optek TechnologyIn Stock: 1868OP505A Datasheet

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OP505B

TT Electronics / Optek TechnologyIn Stock: 3882OP505B Datasheet

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OP506A

TT Electronics/Optek TechnologyIn Stock: 4995OP506A Datasheet

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OP506B

TT Electronics/Optek TechnologyIn Stock: 2709OP506B Datasheet

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QSD123A4R0

onsemiIn Stock: 2470QSD123A4R0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDP8405-015 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Wavelength: 880nm detection capability
• Mounting Type: Through Hole configuration
• Orientation: Top View
• Voltage - Collector Emitter Breakdown: 30V maximum rating
• Current - Dark (Id): 100nA maximum specification
• Package Type: Radial or equivalent form factor

Substitution Logic:

The substitute parts are grouped into two categories based on wavelength alignment:

Category 1 - Wavelength Match (880nm): QSD123A4R0 (onsemi) maintains identical 880nm wavelength specification with radial 5mm diameter package, ensuring direct optical performance equivalence.

Category 2 - Wavelength Variation (935nm): OP505A, OP505B, OP506A, and OP506B (TT Electronics / Optek Technology) operate at 935nm wavelength. These parts share identical voltage breakdown (30V), dark current (100nA), mounting type (Through Hole), and orientation (Top View) specifications. The 935nm wavelength represents a near-infrared shift within the optical sensor spectrum and maintains functional compatibility for applications where spectral sensitivity adjustment is acceptable within system design parameters.

All substitute parts maintain RoHS compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring environmental and regulatory compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - Direct Wavelength Match:

QSD123A4R0 (onsemi) is the recommended primary substitute for SDP8405-015. This part maintains identical 880nm wavelength specification, radial package configuration, and all critical electrical parameters (30V breakdown voltage, 100nA dark current). QSD123A4R0 is currently in active product status with ROHS3 compliance and 2,397 units available in inventory. The radial 5mm diameter package provides direct mechanical compatibility with existing PCB layouts and mounting infrastructure.

Secondary Substitutes - Extended Temperature Range:

OP505A, OP505B, OP506A, and OP506B (TT Electronics / Optek Technology) are qualified substitutes where wavelength variation to 935nm is acceptable within application requirements. These parts offer extended operating temperature range (-40°C to 100°C versus -40°C to 85°C), higher maximum power dissipation (100mW versus 70mW), and higher collector current capability (5.95mA). All four parts maintain active product status with ROHS3 compliance. Inventory availability ranges from 1,800 to 4,967 units across the four variants.

Compliance and Regulatory Considerations:

All substitute parts maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original SDP8405-015 RoHS compliant specification. MSL Level 1 (Unlimited) moisture sensitivity rating is consistent across all options, eliminating moisture management concerns during storage and handling.

Selection Criteria Summary:

• For direct optical performance equivalence: Select QSD123A4R0
• For extended temperature operation: Select OP505A, OP505B, OP506A, or OP506B
• For maximum inventory availability: OP506A (4,967 units) or OP505B (3,807 units)

Frequently Asked Questions (FAQ)

Q1: Can OP505A, OP505B, OP506A, and OP506B be used as direct replacements for SDP8405-015?

A: These parts share identical electrical specifications (30V breakdown voltage, 100nA dark current) and mounting configuration (Through Hole, Top View). The primary difference is wavelength: 935nm versus 880nm. Substitution is valid when the application's optical detection circuit can accommodate the 55nm wavelength shift. Verify that your photodiode or receiver circuit is designed to accept 935nm wavelength input.

Q2: What is the advantage of QSD123A4R0 over the OP505 and OP506 series?

A: QSD123A4R0 maintains the original 880nm wavelength specification, providing direct optical performance equivalence without requiring circuit verification for wavelength compatibility. This eliminates potential sensitivity or detection threshold variations. QSD123A4R0 also features higher collector current capability (16mA) and wider viewing angle (24° versus 20°).

Q3: Are there package compatibility concerns when substituting these parts?

A: QSD123A4R0 uses a radial 5mm diameter package identical to SDP8405-015. OP505A, OP505B, OP506A, and OP506B use T-1 package configuration. Both package types are Through Hole mounted and Top View oriented. Verify PCB footprint compatibility before substitution. T-1 packages may require minor PCB layout adjustment if the original design was optimized for radial lead spacing.

Q4: Do all substitute parts meet the same environmental and compliance standards as SDP8405-015?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected. MSL Level 1 (Unlimited) moisture sensitivity rating is consistent across all options. Operating temperature ranges are -40°C to 100°C for OP505/OP506 series (exceeding the original -40°C to 85°C specification) and not specified for QSD123A4R0.

Q5: Which substitute part offers the best inventory availability?

A: OP506A provides the highest inventory level with 4,967 units in stock. OP505B offers 3,807 units. QSD123A4R0 provides 2,397 units. All quantities support production requirements for most applications.

Q6: What is the significance of the wavelength difference between 880nm and 935nm?

A: The 55nm shift represents movement deeper into the near-infrared spectrum. Applications using 880nm typically employ standard silicon phototransistors optimized for that wavelength. 935nm operation may result in reduced sensitivity or altered spectral response characteristics. Substitution is appropriate only when the receiving circuit (photodiode, amplifier, or detection module) is verified to operate within acceptable parameters at 935nm wavelength.

Q7: Can I mix substitute parts from different manufacturers in the same design?

A: Yes. All substitute parts meet identical electrical specifications for voltage breakdown, dark current, and mounting configuration. However, maintain consistency within a single production batch to ensure uniform optical performance characteristics. If mixing manufacturers, verify that your detection circuit can accommodate potential variations in spectral response between Honeywell, TT Electronics, and onsemi phototransistor designs.