SFH 4726S Equivalent & Substitute Parts

Part Overview

The SFH 4726S is an Infrared (IR) Emitter operating at 950nm wavelength, designed for surface mount applications in 3-SMD, No Lead packaging. This component is classified as Obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The SFH 4726S delivers 215mW/sr radiant intensity at 1A forward current with a 150° viewing angle and operates across the temperature range of -40°C to 125°C.

Substiute Parts

SFH 4726S

ams-OSRAM USA INC.In Stock: 814SFH 4726S Datasheet

Current PartRFQ

SFH 4726AS

ams-OSRAM USA INC.In Stock: 1036SFH 4726AS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4726S is determined by the following critical parameters:

Wavelength Matching: The substitute part must operate at 950nm to maintain spectral compatibility with existing optical system designs and receiver components.

Package Compatibility: Both the main part and substitute must utilize 3-SMD, No Lead surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Viewing Angle: The 150° viewing angle must be maintained to preserve the optical field of view characteristics required by the application.

Operating Temperature Range: The substitute must support the -40°C to 125°C operating temperature range to function across the same environmental conditions.

Compliance Standards: Both parts must maintain ROHS3 compliance and REACH Unaffected status to satisfy regulatory requirements.

The SFH 4726AS qualifies as a substitute based on these parameters. While the substitute exhibits higher maximum forward current (1.5A versus 1A) and forward voltage (2.9V versus 2.75V), these represent enhanced electrical capabilities that do not preclude substitution. The radiant intensity specification (224mW/sr @ 1A versus 215mW/sr @ 1A) indicates improved optical output at the same reference current.

Parameter Comparison

Engineering Selection Recommendations

The SFH 4726AS is the qualified substitute for the obsolete SFH 4726S. Selection of the SFH 4726AS is supported by the following factors:

Product Status: The SFH 4726AS maintains Active product status, ensuring continued availability and manufacturer support, whereas the SFH 4726S is Obsolete and subject to discontinuation.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying current environmental and regulatory requirements for electronic component manufacturing and distribution.

Electrical Compatibility: The SFH 4726AS operates within the same wavelength (950nm) and viewing angle (150°) specifications as the main part. The increased maximum forward current (1.5A) and forward voltage (2.9V) represent enhanced electrical performance that accommodates higher operational demands without compromising backward compatibility with existing circuit designs operating at or below the original 1A specification.

Optical Performance: The SFH 4726AS delivers improved radiant intensity (224mW/sr @ 1A) compared to the main part (215mW/sr @ 1A), providing enhanced optical output at equivalent reference current levels.

Packaging and Thermal: Both parts utilize identical 3-SMD, No Lead surface mount packaging and support the same -40°C to 125°C operating temperature range, ensuring direct mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4726AS be used as a direct replacement for the SFH 4726S in existing designs?

A: Yes. The SFH 4726AS qualifies as a direct substitute based on matching wavelength (950nm), package type (3-SMD, No Lead), viewing angle (150°), and operating temperature range (-40°C to 125°C). The substitute exhibits higher maximum forward current and voltage ratings, which represent enhanced capabilities rather than incompatibilities.

Q: What are the key differences between the SFH 4726S and SFH 4726AS?

A: The primary differences are product status (Obsolete versus Active), maximum forward current (1A versus 1.5A), forward voltage (2.75V versus 2.9V), radiant intensity (215mW/sr versus 224mW/sr @ 1A), and packaging format (unspecified versus Tape & Reel). The substitute offers improved electrical and optical performance while maintaining identical wavelength, viewing angle, and package configuration.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain ROHS3 compliance and REACH Unaffected status. No compliance or certification differences exist between the SFH 4726S and SFH 4726AS.

Q: Does the higher forward voltage of the SFH 4726AS affect circuit design?

A: The forward voltage difference (2.9V versus 2.75V) is 0.15V. Circuit designs must accommodate this specification within their power supply and current-limiting resistor calculations. Existing designs operating at 1A or below will function with the substitute; however, circuit validation is necessary to confirm voltage margin adequacy within the specific application.

Q: What is the significance of the Tape & Reel packaging for the SFH 4726AS?

A: Tape & Reel packaging indicates the substitute is supplied in continuous tape format suitable for automated assembly processes. This packaging format is standard for high-volume production and does not affect electrical or optical performance compared to alternative packaging methods.

Q: Can the SFH 4726AS operate at the same current levels as the SFH 4726S?

A: Yes. The SFH 4726AS supports operation at 1A (the maximum rating of the SFH 4726S) and extends to 1.5A maximum. Designs operating the original part at 1A will function identically with the substitute at the same current level.