SDP8436-002 Equivalent & Substitute Parts Reference

Part Overview

The SDP8436-002 is an 880nm side view radial phototransistor manufactured by Honeywell Sensing and Productivity Solutions. This optical sensor is designed for applications requiring infrared detection at 880nm wavelength with through-hole, right-angle mounting configuration. The product is currently obsolete, necessitating identification of functionally equivalent active alternatives to maintain design continuity and ensure supply chain availability for new production and maintenance applications.

Substiute Parts

SDP8436-002

Honeywell Sensing and Productivity SolutionsIn Stock: 1179SDP8436-002 Datasheet

Current PartRFQ

OED-ST-23G

Lumex Opto/Components Inc.In Stock: 939OED-ST-23G Datasheet

SimilarRFQ

PT928-6B-F

Everlight Electronics Co LtdIn Stock: 844PT928-6B-F Datasheet

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QSE122

onsemiIn Stock: 1812QSE122 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDP8436-002 is determined by strict alignment with the following critical parameters:

Primary Matching Criteria (Must Match):

• Wavelength: 880nm (optical detection spectrum)
• Voltage - Collector Emitter Breakdown: 30V (electrical rating compatibility)
• Current - Dark (Id): 100nA (baseline leakage specification)
• Power - Max: 100mW (thermal rating)
• Mounting Type: Through Hole, Right Angle (physical installation)
• Orientation: Side View (optical configuration)
• Package / Case: Radial (form factor)

Secondary Compatibility Parameters (Allowable Variation):

• Current - Collector (Ic) (Max): Substitute must equal or exceed 10mA minimum
• Viewing Angle: Substitute may differ; application-dependent
• Operating Temperature Range: Substitute must encompass or exceed -40°C ~ 85°C
• RoHS Status: Substitute must maintain RoHS compliance or higher standard

Substitute parts are grouped based on wavelength alignment and electrical parameter compatibility. Parts meeting all primary criteria are classified as direct equivalents. Parts with wavelength deviation (940nm) are listed separately as spectral alternatives requiring application verification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (880nm Wavelength, Direct Equivalents):

QSE122 (onsemi) is the preferred substitute for SDP8436-002. This part maintains identical wavelength (880nm), voltage rating (30V), dark current (100nA), and power dissipation (100mW). Operating temperature range extends to -40°C ~ 100°C, encompassing the original specification. The part is in active production status with ROHS3 compliance certification. Current inventory of 1,709 units ensures supply availability. The part is listed as an original substitute in the SDP8436-002 documentation.

OED-ST-23G (Lumex Opto/Components Inc.) is a secondary 880nm equivalent. This part matches wavelength, voltage, and dark current specifications. However, maximum collector current is rated at 4mA, below the original 10mA specification. Operating temperature range (-20°C ~ 100°C) does not extend to the original -40°C minimum. Viewing angle is 60° compared to 18° on the original part, requiring optical system evaluation. ROHS3 compliance and active production status are confirmed. Current inventory of 858 units is available.

Spectral Alternative (940nm Wavelength):

PT928-6B-F (Everlight Electronics Co Ltd) operates at 940nm wavelength, differing from the original 880nm specification. This part is listed as an original substitute in SDP8436-002 documentation, indicating prior design compatibility assessment. Maximum collector current is 40mA, exceeding the original 10mA rating. Voltage and dark current ratings match the original specification. Operating temperature range (-25°C ~ 85°C) aligns with the original specification. ROHS3 compliance is confirmed with active production status. Current inventory of 808 units is available. Application of this part requires confirmation that 940nm wavelength is acceptable for the intended optical detection function.

Frequently Asked Questions (FAQ)

Q: Can OED-ST-23G be used as a direct replacement for SDP8436-002?

A: OED-ST-23G is electrically compatible for wavelength and voltage specifications. However, the maximum collector current rating of 4mA is below the original 10mA specification. If the application circuit is designed to operate within 4mA collector current limits, this part is suitable. The operating temperature minimum of -20°C does not extend to the original -40°C specification; applications requiring -40°C operation must use QSE122 or maintain the original part. The wider viewing angle (60° vs. 18°) may affect optical system performance and requires evaluation.

Q: What is the difference between QSE122 and the original SDP8436-002?

A: QSE122 maintains all critical electrical parameters: 880nm wavelength, 30V breakdown voltage, 100nA dark current, and 100mW power rating. Operating temperature range extends to -40°C ~ 100°C, encompassing the original -40°C ~ 85°C specification. The primary difference is product status: QSE122 is in active production with confirmed supply availability, while SDP8436-002 is obsolete. Both parts use radial side-view packaging with through-hole mounting. QSE122 is the recommended substitute for new designs and ongoing production.

Q: Why is PT928-6B-F listed as a substitute if it operates at 940nm instead of 880nm?

A: PT928-6B-F is listed in the original SDP8436-002 substitute documentation, indicating prior engineering assessment of wavelength compatibility for specific applications. The 940nm wavelength differs from 880nm, which may affect optical detection performance depending on the target application. This part should be used only when 940nm wavelength has been confirmed as acceptable for the intended function. Applications requiring strict 880nm operation must use QSE122 or OED-ST-23G.

Q: Are all substitute parts RoHS compliant?

A: Yes. QSE122, OED-ST-23G, and PT928-6B-F all carry ROHS3 compliance certification, meeting current regulatory requirements. The original SDP8436-002 carried RoHS Compliant status. All substitute parts maintain or exceed the original compliance standard.

Q: What is the impact of viewing angle differences on substitution?

A: The original SDP8436-002 has an 18° viewing angle. QSE122 has a 50° viewing angle, and OED-ST-23G has a 60° viewing angle. Wider viewing angles increase the field of view, which may affect optical system performance, signal-to-noise ratio, and alignment tolerances. Applications with narrow optical paths or requiring precise directional sensing may require optical system redesign when substituting with wider-angle parts. PT928-6B-F does not specify viewing angle. Optical system evaluation is required when viewing angle differs from the original specification.

Q: Which substitute part has the best current capacity?

A: PT928-6B-F has the highest maximum collector current rating at 40mA, compared to the original 10mA specification. QSE122 does not specify maximum collector current. OED-ST-23G is rated at 4mA, below the original specification. If the application requires high current output, PT928-6B-F provides the greatest capacity, provided 940nm wavelength is acceptable for the intended function.

Q: What are the inventory considerations for each substitute?

A: QSE122 has the highest current inventory at 1,709 units. PT928-6B-F has 808 units in stock. OED-ST-23G has 858 units available. All three parts are in active production status, ensuring ongoing supply availability beyond current inventory levels. QSE122 offers the best supply security for high-volume applications.