SFH 4140 Equivalent & Substitute Parts

Part Overview

The SFH 4140 is an Infrared (IR) Emitter operating at 950nm wavelength, manufactured by ams-OSRAM USA INC. This component is designed for applications requiring side-view infrared emission with a 50° viewing angle. The part is currently Active in product status and maintains full RoHS3 compliance. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of the application, particularly when inventory availability or specific operational requirements necessitate alternative component selection.

Substiute Parts

SFH 4140

ams-OSRAM USA INC.In Stock: 1197SFH 4140 Datasheet

Current PartRFQ

SFH 4045N

ams-OSRAM USA INC.In Stock: 20869SFH 4045N Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4140 is determined by the following critical parameters that must remain compatible with the application:

Wavelength Compatibility: The substitute part must operate at 950nm to maintain spectral alignment with receiver components and optical filtering systems.

Package and Mounting: Both the main part and substitute must utilize 2-SMD, No Lead surface mount packaging with right-angle orientation to ensure mechanical compatibility with printed circuit board layouts.

Compliance and Environmental Standards: All substitute parts must maintain RoHS3 compliance and equivalent Moisture Sensitivity Level (MSL) ratings to satisfy manufacturing and reliability requirements.

Electrical Operating Range: The substitute part must function within the specified operating temperature range and maintain appropriate forward voltage and current characteristics for the application circuit.

The SFH 4045N is identified as a substitute part based on these parameters. While the SFH 4045N operates at reduced maximum forward current (70mA versus 100mA) and lower operating temperature maximum (85°C versus 100°C), it maintains the same 950nm wavelength, identical package configuration, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the SFH 4140 and SFH 4045N maintain Active product status with full RoHS3 compliance and equivalent Moisture Sensitivity Level ratings. Selection between these parts is determined by application-specific electrical and optical requirements.

The SFH 4140 is suitable for applications requiring maximum forward current operation at 100mA with extended operating temperature range to 100°C and a wider 50° viewing angle for broader infrared distribution.

The SFH 4045N operates at reduced maximum forward current (70mA) with a narrower 18° viewing angle and maximum operating temperature of 85°C. This part is suitable for applications with lower power budgets or where concentrated infrared emission within a narrower field of view is required. The SFH 4045N demonstrates higher radiant intensity at its rated current (90mW/sr @ 70mA compared to 25mW/sr @ 100mA for the main part).

Both parts are manufactured by ams-OSRAM USA INC., share identical 950nm wavelength specification, and utilize the same 2-SMD, No Lead surface mount package configuration. Selection should be based on the specific forward current, operating temperature, and viewing angle requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4045N directly replace the SFH 4140 in all applications?

A: Direct substitution depends on application requirements. Both parts share the same 950nm wavelength, package type, and compliance certifications. However, the SFH 4045N operates at lower maximum forward current (70mA versus 100mA), lower maximum operating temperature (85°C versus 100°C), and narrower viewing angle (18° versus 50°). Applications must accommodate these parameter differences.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Maximum forward current: SFH 4140 operates at 100mA while SFH 4045N operates at 70mA; (2) Viewing angle: SFH 4140 provides 50° while SFH 4045N provides 18°; (3) Operating temperature maximum: SFH 4140 extends to 100°C while SFH 4045N extends to 85°C; (4) Radiant intensity: SFH 4045N delivers 90mW/sr @ 70mA compared to SFH 4140 at 25mW/sr @ 100mA.

Q: Are both parts available in the same packaging format?

A: Both parts utilize 2-SMD, No Lead surface mount packages with right-angle orientation. The SFH 4140 is available in standard packaging while the SFH 4045N is available in Tape & Reel (TR) format. Both are compatible with standard surface mount assembly processes.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the SFH 4140 and SFH 4045N are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Both maintain Moisture Sensitivity Level 3 (168 Hours) ratings.

Q: Which part should be selected for high-temperature applications?

A: The SFH 4140 is specified for operation up to 100°C, making it suitable for applications requiring extended high-temperature performance. The SFH 4045N is limited to 85°C maximum operating temperature.

Q: Which part provides better radiant intensity?

A: The SFH 4045N delivers higher radiant intensity at its rated current (90mW/sr @ 70mA) compared to the SFH 4140 (25mW/sr @ 100mA). However, the SFH 4140 can operate at higher forward current levels, allowing for increased total radiant output when circuit design permits.