SD1440-004L Equivalent & Substitute Parts

Part Overview

The SD1440-004L 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, making equivalent substitute parts necessary for ongoing system support and new design implementations. The sensor operates across an extended temperature range of -55°C to 125°C and features a 24° viewing angle suitable for infrared sensing applications.

Substiute Parts

SD1440-004L

Honeywell Sensing and Productivity SolutionsIn Stock: 5976SD1440-004L Datasheet

Current PartRFQ

LTR-3208E

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

SimilarRFQ

OP516A

TT Electronics/Optek TechnologyIn Stock: 9048OP516A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD1440-004L is determined by the following critical parameters:

Primary Matching Criteria:

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

Substitution Logic: Substitute parts must maintain electrical compatibility through matching or exceeding voltage ratings and dark current specifications. Package and mounting configuration must be identical to ensure mechanical fit in existing PCB designs. Wavelength tolerance of ±5nm is acceptable within infrared sensing applications. Operating temperature range must encompass or equal the original specification to ensure reliability across the full operational envelope.

Parameter Comparison

Engineering Selection Recommendations

OP516A (TT Electronics/Optek Technology) - Primary Substitute:

The OP516A is the optimal substitute for the obsolete SD1440-004L. Both components share identical package configuration (Coaxial, Metal Can), mounting type (Through Hole), orientation (Top View), and wavelength specification (935nm). The OP516A maintains the full operating temperature range of -55°C to 125°C, matching the original specification exactly. Voltage rating is equivalent at 30 V maximum collector-emitter breakdown. The OP516A is currently in active production status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory compliance. Current inventory of 8,976 pieces supports immediate procurement requirements.

LTR-3208E (Lite-On Inc.) - Secondary Substitute:

The LTR-3208E serves as an alternative substitute with the following considerations: wavelength is 940nm, representing a 5nm deviation from the original 935nm specification within acceptable near-infrared tolerance. Package configuration differs as Radial versus Coaxial, Metal Can, requiring PCB layout modification and mechanical redesign. Operating temperature range is restricted to -40°C to 85°C, which does not cover the full -55°C to 125°C envelope of the original part. The LTR-3208E is active production status with ROHS3 compliance and extensive inventory availability (39,084 pieces). This substitute is suitable only for applications where the narrower temperature range and package reconfiguration are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the OP516A directly replace the SD1440-004L without PCB modification?

A: Yes. The OP516A maintains identical package configuration (Coaxial, Metal Can), mounting type (Through Hole), and orientation (Top View). No PCB layout changes are required for mechanical compatibility.

Q: What is the significance of the 5nm wavelength difference between SD1440-004L (935nm) and LTR-3208E (940nm)?

A: Both wavelengths operate within the near-infrared spectrum used for optical sensing applications. The 5nm difference falls within typical tolerance for infrared detector applications. However, optical filter characteristics and detector sensitivity curves may differ slightly. System-level performance validation is necessary if spectral precision is critical to application function.

Q: Why does the LTR-3208E have a restricted operating temperature range?

A: The LTR-3208E is specified for -40°C to 85°C operation, which does not encompass the full -55°C to 125°C range of the original SD1440-004L. This limitation may restrict use in extended temperature environments such as automotive or industrial applications requiring the full temperature envelope.

Q: What does "Coaxial, Metal Can" package mean compared to "Radial" package?

A: Coaxial, Metal Can configuration features a cylindrical metal housing with coaxial lead arrangement, typically used for shielded optical sensing. Radial package features leads extending radially from the component body. These are mechanically incompatible and require different PCB footprints and mounting approaches.

Q: Are both substitute parts RoHS compliant?

A: Yes. The OP516A and LTR-3208E are both ROHS3 compliant, meeting current environmental and regulatory requirements. The original SD1440-004L is RoHS Compliant, indicating earlier RoHS directive compliance.

Q: Which substitute part has better long-term availability?

A: Both OP516A and LTR-3208E are in active production status. The LTR-3208E has higher current inventory (39,084 pieces) compared to OP516A (8,976 pieces). For long-term supply chain planning, both manufacturers maintain active product lines with no announced discontinuation.