SDP8406-002 Equivalent & Substitute Parts

Part Overview

The SDP8406-002 is a 935nm phototransistor with side view radial mounting manufactured by Honeywell Sensing and Productivity Solutions. This optical sensor is classified as obsolete, necessitating identification of active equivalent components for ongoing design support and procurement. The part operates across an industrial temperature range of -40°C to 85°C with a collector-emitter breakdown voltage of 30V and maximum collector current of 3.6mA. Substitute parts must maintain functional compatibility across wavelength, mounting type, orientation, and electrical performance parameters.

Substiute Parts

SDP8406-002

Honeywell Sensing and Productivity SolutionsIn Stock: 1148SDP8406-002 Datasheet

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OP550A

TT Electronics/Optek TechnologyIn Stock: 2027OP550A Datasheet

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OP550B

TT Electronics / Optek TechnologyIn Stock: 1221OP550B Datasheet

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OP550C

TT Electronics/Optek TechnologyIn Stock: 3748OP550C Datasheet

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OP555B

TT Electronics/Optek TechnologyIn Stock: 1401OP555B Datasheet

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PT928-6C-F

Everlight Electronics Co LtdIn Stock: 3295PT928-6C-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SDP8406-002 is based on the following criteria:

Primary Compatibility Parameters:

• Wavelength: 935nm (with 940nm as near-equivalent within infrared spectrum)
• Mounting Type: Through Hole, Right Angle
• Orientation: Side View
• Package Type: Radial

Secondary Compatibility Parameters:

• Voltage - Collector Emitter Breakdown: 30V minimum
• Current - Collector (Ic): Equal to or greater than 3.6mA
• Current - Dark (Id): 100nA maximum
• Power Dissipation: 100mW minimum
• Operating Temperature: Must encompass -40°C to 85°C range

Compliance Parameters:

• RoHS Status: RoHS3 Compliant or equivalent
• Moisture Sensitivity Level: MSL 1 (Unlimited)

All identified substitute parts maintain the primary parameters of wavelength, mounting configuration, orientation, and radial package type. Variations in secondary parameters are documented to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

OP550A, OP550B, and OP555B are direct functional equivalents manufactured by TT Electronics/Optek Technology. All three parts maintain 935nm wavelength, radial side view orientation, and through-hole mounting. These parts carry Active product status with ROHS3 compliance and extended operating temperature ranges to -40°C to 100°C, exceeding the SDP8406-002 specification. OP550A and OP550B provide collector current ratings of 4.7mA, exceeding the original 3.6mA specification. OP555B offers identical electrical performance with a 56° viewing angle compared to the original 50°.

OP550C maintains all primary compatibility parameters with a reduced collector current maximum of 2.4mA. This part is suitable for applications where lower current operation is acceptable or required.

PT928-6C-F manufactured by Everlight Electronics provides functional substitution with 940nm wavelength operation, maintaining through-hole right-angle mounting and side view radial package configuration. This part features significantly higher collector current capability at 40mA and matches the original mounting type specification precisely. Operating temperature range is -25°C to 85°C, which covers the original specification minimum. The 940nm wavelength represents a 5nm shift from the original 935nm specification within the near-infrared spectrum.

All substitute parts maintain 30V collector-emitter breakdown voltage, 100nA maximum dark current, 100mW power dissipation, MSL 1 rating, and ROHS3 compliance. Selection should be based on specific application requirements regarding collector current capacity, operating temperature extremes, and wavelength tolerance.

Frequently Asked Questions (FAQ)

Q: Can OP550C be used as a direct replacement for SDP8406-002?

A: OP550C maintains all primary compatibility parameters including 935nm wavelength, radial side view package, and through-hole mounting. The reduced collector current maximum of 2.4mA is lower than the original 3.6mA specification. Substitution is valid for applications where the lower current rating does not exceed circuit requirements.

Q: What is the significance of the 940nm wavelength in PT928-6C-F compared to the original 935nm?

A: PT928-6C-F operates at 940nm, a 5nm shift within the near-infrared spectrum. Both wavelengths fall within the infrared detection range. Application compatibility depends on the specific optical filter or detector sensitivity characteristics of the receiving circuit. The part maintains all other primary parameters including mounting type, orientation, and package configuration.

Q: Are OP550A and OP550B interchangeable?

A: OP550A and OP550B are both manufactured by TT Electronics/Optek Technology with identical electrical specifications including 4.7mA maximum collector current, 30V breakdown voltage, and 935nm wavelength. Both maintain radial side view through-hole mounting and ROHS3 compliance. These parts are functionally interchangeable for the SDP8406-002 application.

Q: Does the extended operating temperature range of OP550 series parts affect substitution validity?

A: The OP550A, OP550B, and OP555B all specify -40°C to 100°C operating temperature, which encompasses the original SDP8406-002 range of -40°C to 85°C. Extended temperature capability does not compromise substitution validity and may provide additional design margin for applications operating near temperature extremes.

Q: What is the impact of the 56° viewing angle in OP555B versus the 50° angle in SDP8406-002?

A: OP555B specifies a 56° viewing angle compared to the original 50°. This represents a 6° increase in angular field of view. Substitution validity depends on whether the application circuit design accommodates the wider viewing angle. In applications where precise angular response is critical, this parameter difference must be evaluated against specific optical system requirements.

Q: Is PT928-6C-F suitable for applications requiring the exact -40°C lower temperature limit?

A: PT928-6C-F specifies an operating temperature range of -25°C to 85°C, which does not extend to the original -40°C minimum. This part is not suitable for applications requiring operation at temperatures below -25°C. OP550A, OP550B, and OP555B all maintain the -40°C minimum specification and are preferred for low-temperature applications.

Q: How do the RoHS compliance statuses compare across substitute parts?

A: The original SDP8406-002 carries RoHS Compliant status. All substitute parts (OP550A, OP550B, OP550C, OP555B, and PT928-6C-F) carry ROHS3 Compliant status, representing current RoHS directive compliance. ROHS3 compliance is equivalent to or exceeds the original RoHS Compliant designation for procurement and regulatory purposes.

Q: What is the primary reason for substituting the obsolete SDP8406-002?

A: The SDP8406-002 carries Obsolete product status, indicating discontinued manufacturing and limited availability. Active substitute parts ensure long-term design support, procurement reliability, and compliance with current manufacturing standards. All identified substitutes maintain functional compatibility while offering active product status and current compliance certifications.