SD1440-001 Equivalent & Substitute Parts

Part Overview

The SD1440-001 is a phototransistor optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for 935nm infrared detection in top view coaxial configuration with metal can packaging. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing applications requiring 935nm wavelength detection, similar electrical performance, and compatible through-hole mounting.

Substiute Parts

SD1440-001

Honeywell Sensing and Productivity SolutionsIn Stock: 1127SD1440-001 Datasheet

Current PartRFQ

LTR-3208E

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

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OP515B

TT Electronics / Optek TechnologyIn Stock: 794OP515B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD1440-001 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Wavelength: 935nm or 940nm (near-infrared spectrum compatibility)
• Voltage - Collector Emitter Breakdown: 30 V (electrical rating match)
• Current - Dark (Id): 100 nA (leakage current specification)
• Mounting Type: Through Hole
• Orientation: Top View
• Package / Case: Coaxial, Metal Can or compatible radial configuration
• Operating Temperature Range: Minimum -55°C to 125°C coverage

Substitution Logic: Parts are grouped as equivalent when they maintain the same wavelength detection capability, electrical breakdown ratings, and through-hole mounting configuration. The OP515B provides exact wavelength and package matching. The LTR-3208E offers near-wavelength operation (940nm) with compatible electrical specifications but uses radial packaging instead of coaxial configuration.

Parameter Comparison

Engineering Selection Recommendations

OP515B (Primary Substitute): The OP515B is the preferred substitute for SD1440-001 applications. It maintains exact wavelength specification (935nm), identical voltage breakdown rating (30 V), matching coaxial metal can package configuration, and extended operating temperature range (-55°C ~ 125°C). Product status is active with ROHS3 compliance and REACH unaffected designation. Power rating is increased to 100 mW, providing operational margin above the original 75 mW specification. This part requires no circuit redesign or mechanical modification.

LTR-3208E (Secondary Substitute): The LTR-3208E is suitable for applications where wavelength tolerance permits 940nm operation (5nm offset from 935nm specification). Electrical ratings match the main part (30 V breakdown, 100 nA dark current). Operating temperature range is reduced to -40°C ~ 85°C, which may not satisfy applications requiring full -55°C to 125°C coverage. Radial package configuration requires mechanical redesign of mounting fixtures compared to the coaxial configuration. Product status is active with ROHS3 compliance. This substitute is applicable only when circuit design accommodates near-infrared wavelength variation and thermal operating range reduction.

Frequently Asked Questions (FAQ)

Q: Can OP515B directly replace SD1440-001 without circuit modification? A: Yes. The OP515B maintains identical electrical specifications (30 V breakdown voltage, 935nm wavelength), matching package configuration (coaxial metal can), and compatible operating temperature range (-55°C ~ 125°C). No circuit redesign is required.

Q: What is the primary difference between OP515B and LTR-3208E substitutes? A: The OP515B uses coaxial metal can packaging identical to SD1440-001, while LTR-3208E uses radial packaging. Additionally, OP515B operates at 935nm (exact match) versus LTR-3208E at 940nm. Operating temperature range differs: OP515B covers -55°C ~ 125°C while LTR-3208E covers -40°C ~ 85°C.

Q: Is the 5nm wavelength difference between 935nm and 940nm significant? A: Wavelength difference is application-dependent. Both wavelengths fall within the near-infrared spectrum. Applications with wavelength-specific optical filtering or detector sensitivity requirements must evaluate whether 940nm operation is acceptable. The OP515B at 935nm eliminates this consideration.

Q: What is the impact of radial versus coaxial packaging? A: Coaxial packaging (SD1440-001, OP515B) uses a single axial lead configuration suitable for specific mounting geometries. Radial packaging (LTR-3208E) uses multiple leads perpendicular to the component body. Mechanical redesign of PCB footprints and mounting fixtures is required when switching from coaxial to radial configuration.

Q: Are all substitute parts RoHS compliant? A: Yes. SD1440-001 is RoHS Compliant. Both OP515B and LTR-3208E are ROHS3 Compliant, meeting current regulatory requirements. All parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Which substitute has the highest power rating? A: Both OP515B and LTR-3208E have 100 mW maximum power rating, compared to SD1440-001 at 75 mW. This provides 25 mW additional operational margin in substitute parts.

Q: What is the inventory status of substitute parts? A: OP515B has 756 pieces in stock. LTR-3208E has 39,084 pieces in stock. Both are actively manufactured and available for procurement.