SDP8405-013 Equivalent & Substitute Parts

Part Overview

The SDP8405-013 is a phototransistor optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for 935nm infrared detection with top view radial mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance, repair, and new design implementations where 935nm detection capability is required.

The primary reason for identifying substitute parts is the discontinued status of the SDP8405-013. Active production alternatives with compatible electrical and mechanical specifications ensure design continuity and supply chain reliability.

Substiute Parts

SDP8405-013

Honeywell Sensing and Productivity SolutionsIn Stock: 707SDP8405-013 Datasheet

Current PartRFQ

LTR-3208E

Lite-On Inc.In Stock: 39100LTR-3208E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDP8405-013 are identified based on strict compatibility criteria derived from the allowed electrical and mechanical parameters for phototransistor optical sensors in the 935nm infrared spectrum.

Substitution Logic:

The following parameters determine substitution eligibility:

• Wavelength Compatibility: Substitute parts must operate in the near-infrared spectrum within acceptable tolerance of the original 935nm specification. The LTR-3208E operates at 940nm, representing a 5nm variance within typical infrared sensor application tolerances.
• Electrical Ratings: Collector-emitter breakdown voltage, maximum collector current, and dark current specifications must meet or exceed the original part requirements to ensure safe operation in existing circuit designs.
• Mechanical Compatibility: Mounting type (Through Hole), orientation (Top View), and package configuration (Radial) must be identical to enable direct board-level substitution without redesign.
• Environmental Specifications: Operating temperature range and moisture sensitivity level must match or exceed the original specifications.
• Regulatory Compliance: RoHS and REACH compliance status ensures substitutes meet current environmental and safety standards.

Parameter Comparison

Engineering Selection Recommendations

LTR-3208E (Lite-On Inc.) - Primary Substitute

The LTR-3208E is the qualified substitute for the obsolete SDP8405-013. Selection is based on the following engineering criteria:

• Product Status: The LTR-3208E is in active production, ensuring long-term supply availability and manufacturing consistency compared to the obsolete SDP8405-013.
• Electrical Compatibility: All critical electrical parameters (collector-emitter breakdown voltage, dark current, viewing angle) are equivalent. The LTR-3208E provides higher maximum collector current (3.12 mA vs. 920 µA) and power dissipation (100 mW vs. 70 mW), ensuring operation within existing circuit designs without thermal or current-limiting concerns.
• Mechanical Compatibility: Identical mounting type (Through Hole), orientation (Top View), and radial package configuration enable direct substitution without PCB redesign or mechanical rework.
• Environmental Compliance: Both components operate across the identical temperature range (-40 to 85°C). The LTR-3208E meets ROHS3 compliance, representing the current environmental standard.
• Wavelength Specification: The 940nm wavelength of the LTR-3208E represents a 5nm shift from the original 935nm specification. This variance is within the typical tolerance band for infrared phototransistor applications and does not compromise functional compatibility in standard detection circuits.

Frequently Asked Questions (FAQ)

Q: Can the LTR-3208E directly replace the SDP8405-013 without circuit modification?

A: Yes. The LTR-3208E is mechanically and electrically compatible with the SDP8405-013. Identical mounting type, package configuration, and electrical ratings (collector-emitter breakdown voltage, dark current, viewing angle) enable direct board-level substitution. No circuit redesign is required.

Q: What is the significance of the 5nm wavelength difference (935nm vs. 940nm)?

A: The 5nm variance between the SDP8405-013 (935nm) and LTR-3208E (940nm) falls within the standard tolerance band for infrared phototransistor applications. Both wavelengths operate in the near-infrared spectrum and are compatible with typical 940nm infrared LED emitters and standard detection circuits. Application-specific spectral filtering requirements should be evaluated if narrow-band wavelength precision is critical.

Q: Is the higher maximum collector current of the LTR-3208E (3.12 mA vs. 920 µA) a concern?

A: No. The higher maximum collector current specification of the LTR-3208E indicates greater current-handling capability and does not create compatibility issues. Existing circuits designed for the SDP8405-013 will operate safely with the LTR-3208E, as the substitute part can deliver the required current without exceeding design limits.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 represents the current revision of the Restriction of Hazardous Substances directive, incorporating updated restricted substance lists and compliance requirements. The LTR-3208E's ROHS3 compliance ensures adherence to the latest environmental standards and regulatory requirements for electronic components.

Q: Are there any packaging differences between the SDP8405-013 and LTR-3208E?

A: Both components use identical radial through-hole packages. The SDP8405-013 is listed with unspecified packaging, while the LTR-3208E is supplied in bulk packaging. This difference does not affect electrical or mechanical compatibility; it reflects standard distribution and inventory practices.

Q: What is the inventory status of the LTR-3208E?

A: The LTR-3208E is in active production with 39,084 pieces in current stock, ensuring reliable supply availability for immediate and ongoing procurement needs.