SD2440-004 Equivalent & Substitute Parts Reference

Part Overview

The SD2440-004 is a phototransistor optical sensor manufactured by Honeywell Sensing and Productivity Solutions, designed for top view detection applications in a mini-pill package format. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production, maintenance, and new design implementations. The part operates across an extended temperature range of -55°C to 125°C and features a 48° viewing angle suitable for directional light detection applications.

Substiute Parts

SD2440-004

Honeywell Sensing and Productivity SolutionsIn Stock: 5760SD2440-004 Datasheet

Current PartRFQ

OP600A

TT Electronics/Optek TechnologyIn Stock: 787OP600A Datasheet

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OP644SL

TT Electronics / Optek TechnologyIn Stock: 1032OP644SL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SD2440-004 is determined by the following critical parameters:

Mechanical Compatibility:

• Mounting Type: Surface Mount
• Orientation: Top View
• Package Format: Pill-type enclosure (mini-pill or pill)

Electrical Performance Boundaries:

• Voltage - Collector Emitter Breakdown: minimum 25 V (substitute parts must withstand at least 25 V; SD2440-004 rated at 30 V)
• Current - Collector (Ic): minimum 50 mA available (substitute parts exceed SD2440-004's 7 mA maximum)
• Current - Dark (Id): maximum 100 nA (substitute parts match this specification)
• Power Dissipation: minimum 50 mW (substitute parts rated at 50 mW; SD2440-004 rated at 125 mW)

Environmental Compliance:

• Operating Temperature Range: -65°C ~ 125°C (substitute parts extend lower temperature limit)
• RoHS Compliance: ROHS3 Compliant (substitute parts meet enhanced RoHS requirements)
• MSL Rating: 1 (Unlimited) (substitute parts match moisture sensitivity level)

The substitute parts OP600A and OP644SL are functionally equivalent phototransistors with top view orientation and surface mount configuration. Both maintain dark current specifications and operating temperature ranges suitable for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SD2440-004 is classified as obsolete. Both OP600A and OP644SL are active products with current manufacturing support and documented availability. Selection of active substitute parts ensures long-term supply chain viability and access to technical documentation.

Compliance and Certification: All three parts carry EAR99 export classification and identical HTSUS codes (8541.49.7080), indicating regulatory equivalence. Substitute parts OP600A and OP644SL meet ROHS3 compliance, which represents an enhanced environmental standard compared to the SD2440-004's RoHS Compliant designation. Both substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original component.

Electrical Performance: The substitute parts operate at reduced maximum collector-emitter breakdown voltage (25 V versus 30 V) and reduced maximum power dissipation (50 mW versus 125 mW). Applications requiring the full 30 V breakdown voltage or 125 mW power capability must evaluate circuit design constraints. The substitute parts provide higher maximum collector current (50 mA versus 7 mA), which represents enhanced current handling capability.

Temperature Range: Substitute parts extend the lower operating temperature limit to -65°C, providing broader environmental coverage compared to the SD2440-004's -55°C minimum. Both substitute parts maintain the 125°C upper temperature limit.

Package Consideration: The SD2440-004 uses a mini-pill package, while substitute parts use a standard pill package. Physical dimensions and PCB footprint compatibility must be verified for mechanical fit in existing designs.

Frequently Asked Questions (FAQ)

Q: Can OP600A and OP644SL be used interchangeably with SD2440-004?

A: Both OP600A and OP644SL are functionally equivalent substitutes for the obsolete SD2440-004 in applications where the reduced maximum voltage (25 V versus 30 V) and power rating (50 mW versus 125 mW) are acceptable. The pill package format differs from the mini-pill original, requiring mechanical verification. Dark current specifications and operating temperature ranges are compatible.

Q: What are the key differences between OP600A and OP644SL?

A: Both parts share identical electrical specifications, operating temperature ranges, and compliance certifications. The primary distinction is the base product number designation (OP600 versus OP644). Both are manufactured by TT Electronics / Optek Technology and are active products with current inventory availability.

Q: Does the package format change affect circuit design?

A: The transition from mini-pill to pill package requires verification of PCB footprint compatibility, lead spacing, and mounting orientation. Physical dimensions and solder pad layouts must be confirmed before implementation. Surface mount orientation remains top view for all parts.

Q: Are there wavelength specifications for the SD2440-004?

A: The SD2440-004 wavelength specification is not provided in the technical parameters. Substitute parts OP600A and OP644SL are specified for 890nm wavelength operation. Application-specific wavelength requirements must be evaluated independently.

Q: What is the significance of the 48° viewing angle on the SD2440-004?

A: The SD2440-004 specifies a 48° viewing angle for directional light detection. Substitute parts OP600A and OP644SL do not provide viewing angle specifications in the available technical data. Applications requiring specific angular response characteristics must evaluate this parameter separately.

Q: Are all three parts RoHS compliant?

A: Yes. The SD2440-004 is RoHS Compliant. Substitute parts OP600A and OP644SL are ROHS3 Compliant, which represents an enhanced environmental standard. All parts meet regulatory requirements for hazardous substance restrictions.

Q: What is the inventory status for these parts?

A: SD2440-004 has 5,740 pieces in stock (obsolete status). OP600A has 723 pieces available. OP644SL has 956 pieces available. Both substitute parts are active products with ongoing supply.