SFH 2440 Equivalent & Substitute Parts

Part Overview

The SFH 2440 is a photodiode optical sensor manufactured by ams-OSRAM USA INC., designed for 620nm wavelength detection applications. This component features a 2-SMD Gull Wing package configuration with a 90ns response time and 60° viewing angle. The SFH 2440 is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for applications requiring continued component availability, design migration, or performance optimization in new development efforts.

Substiute Parts

SFH 2440

ams-OSRAM USA INC.In Stock: 7643SFH 2440 Datasheet

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BPW 34 S-Z

ams-OSRAM USA INC.In Stock: 800414BPW 34 S-Z Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 2440 is evaluated based on the following critical parameters: package type (2-SMD Gull Wing), mounting technology (Surface Mount), operating temperature range (-40°C ~ 100°C), compliance certifications (ROHS3, REACH Unaffected), and moisture sensitivity level (MSL 4). The BPW 34 S-Z shares identical package configuration, mounting type, temperature range, and compliance status, establishing it as a valid substitute candidate. However, substitution requires careful consideration of wavelength-dependent performance characteristics, as the BPW 34 S-Z operates at 850nm rather than 620nm, resulting in different spectral response profiles and application suitability.

Parameter Comparison

Engineering Selection Recommendations

The BPW 34 S-Z is the designated substitute for the SFH 2440 based on identical package configuration, mounting technology, and compliance certifications. The BPW 34 S-Z maintains ROHS3 compliance and MSL 4 rating, ensuring compatibility with standard PCB assembly processes and environmental requirements.

The BPW 34 S-Z offers superior performance characteristics in several areas: response time of 20ns compared to 90ns, maximum reverse voltage of 32V versus 16V, and lower dark current of 2nA versus 5nA. The BPW 34 S-Z also provides a wider viewing angle of 120° compared to 60°.

Critical differences exist in wavelength specification: the BPW 34 S-Z operates at 850nm with a spectral range of 400nm to 1100nm, whereas the SFH 2440 operates at 620nm with a spectral range of 400nm to 690nm. This wavelength difference directly impacts optical coupling efficiency and spectral sensitivity in applications requiring specific wavelength detection. Selection between these components must account for application-specific wavelength requirements and optical filter characteristics.

The BPW 34 S-Z is classified as "Active" product status, providing long-term availability and supply chain stability compared to the SFH 2440's "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can the BPW 34 S-Z directly replace the SFH 2440 in existing designs?

A: The BPW 34 S-Z shares identical package configuration (2-SMD Gull Wing), mounting type (Surface Mount), and compliance certifications (ROHS3, MSL 4). However, the 850nm wavelength of the BPW 34 S-Z differs from the 620nm wavelength of the SFH 2440. Direct replacement is possible only in applications where the 850nm wavelength is compatible with the optical system design, including light source characteristics and optical filtering.

Q: What are the key performance differences between these photodiodes?

A: The BPW 34 S-Z provides faster response time (20ns versus 90ns), higher maximum reverse voltage (32V versus 16V), lower dark current (2nA versus 5nA), and wider viewing angle (120° versus 60°). The active area remains nearly identical at 7mm² versus 7.02mm². These differences result in improved signal-to-noise ratio and faster signal acquisition with the BPW 34 S-Z.

Q: Are there packaging or handling differences between these components?

A: Both components share identical MSL 4 rating (72 hours) and operating temperature range (-40°C ~ 100°C). The SFH 2440 is supplied in Tape & Reel (TR) packaging, while the BPW 34 S-Z is supplied in Cut Tape (CT) and Digi-Reel® packaging. Both are surface mount components with identical 2-SMD Gull Wing package specifications, requiring identical PCB footprints and reflow soldering profiles.

Q: Why is the SFH 2440 marked "Not For New Designs"?

A: The "Not For New Designs" status indicates the SFH 2440 has reached end-of-life and is no longer recommended for new product development. The BPW 34 S-Z, classified as "Active," is the recommended alternative for new designs requiring photodiode functionality in this product category.

Q: What compliance certifications apply to both components?

A: Both the SFH 2440 and BPW 34 S-Z are ROHS3 compliant and REACH unaffected. Both carry ECCN classification EAR99 and HTSUS code 8541.49.1050, ensuring equivalent regulatory and trade compliance status.