SFH 4646-TV Equivalent & Substitute Parts

Part Overview

The SFH 4646-TV is an Infrared (IR) Emitter manufactured by ams-OSRAM USA INC., operating at 950nm wavelength with a maximum forward current of 70mA and typical forward voltage of 1.6V. This component is part of the Power TOPLED® series and is classified as Active product status. The SFH 4646-TV is housed in a 2-SMD, No Lead surface mount package suitable for automated assembly processes.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified operating parameters. Alternative models may be required due to inventory availability, manufacturing discontinuation, or specific application requirements within the allowed parameter ranges.

Substiute Parts

SFH 4646-TV

ams-OSRAM USA INC.In Stock: 1122SFH 4646-TV Datasheet

Current PartRFQ

SFH 4045N

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH 4646-TV is determined by matching the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Wavelength: 950nm (exact match required)
• Maximum Forward Current (If): 70mA (equal or greater)
• Forward Voltage (Vf): 1.6V typical (within component tolerance)
• Radiant Intensity (Ie): Minimum 25mW/sr @ 70mA (equal or greater)

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package / Case: 2-SMD, No Lead
• Operating Temperature Range: Must encompass or exceed -40°C to 100°C

Regulatory Compliance:

• RoHS3 Compliant status required
• REACH Unaffected classification

The SFH 4045N meets the electrical wavelength and current specifications but operates within a reduced temperature range (-40°C to 85°C) and exhibits higher radiant intensity (90mW/sr @ 70mA). The viewing angle differs at 18° compared to the primary part's 20°, and orientation is specified as Side View versus Top View. These differences establish the substitution relationship within defined application constraints.

Parameter Comparison

Engineering Selection Recommendations

SFH 4646-TV Primary Selection: The SFH 4646-TV is the specified component for applications requiring the full operating temperature range of -40°C to 100°C. This part maintains Active product status with ROHS3 compliance and REACH Unaffected classification. The Power TOPLED® series designation indicates optimized performance characteristics for this application class.

SFH 4045N Substitution Conditions: The SFH 4045N is substitutable when the application operating temperature does not exceed 85°C. This part is from the CHIPLED series and provides higher radiant intensity (90mW/sr @ 70mA) compared to the minimum specification (25mW/sr @ 70mA) of the primary part. The SFH 4045N maintains identical wavelength, forward current, and forward voltage specifications. Both parts carry ROHS3 compliance and REACH Unaffected status, ensuring regulatory equivalence.

The orientation difference (Top View versus Side View) and viewing angle variation (20° versus 18°) must be evaluated within specific circuit board layout and optical design constraints. The SFH 4045N's Right Angle mounting configuration may require PCB footprint verification.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4045N replace the SFH 4646-TV in all applications?

A: The SFH 4045N is substitutable only when the application's maximum operating temperature does not exceed 85°C. The SFH 4646-TV supports operation to 100°C. Both parts share identical wavelength (950nm), forward current (70mA), and forward voltage (1.6V) specifications. Verify thermal requirements before substitution.

Q: What is the significance of the radiant intensity difference between these parts?

A: The SFH 4045N provides 90mW/sr @ 70mA compared to the SFH 4646-TV minimum of 25mW/sr @ 70mA. Higher radiant intensity indicates greater optical output. Applications designed for the SFH 4646-TV will function with the SFH 4045N, as the substitute exceeds the minimum specification. Optical system design may require adjustment if the increased intensity affects performance.

Q: Are there package compatibility concerns between these parts?

A: Both parts use 2-SMD, No Lead surface mount packages. The SFH 4045N specifies Right Angle mounting orientation, while the SFH 4646-TV specifies Top View orientation. PCB footprint and component placement must accommodate the orientation difference. Verify mechanical fit within the target assembly before implementation.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SFH 4646-TV and SFH 4045N are ROHS3 Compliant and REACH Unaffected. Regulatory equivalence is established for applications subject to these compliance frameworks.

Q: What is the viewing angle difference impact?

A: The SFH 4646-TV has a 20° viewing angle, while the SFH 4045N has an 18° viewing angle. This 2° difference affects the optical beam width and intensity distribution. Applications with specific optical field-of-view requirements must evaluate whether the narrower beam angle of the SFH 4045N is acceptable.

Q: Which part should be selected for new designs?

A: For new designs, select based on the maximum operating temperature requirement. If the application operates within -40°C to 85°C, either part is suitable. If operation extends to 100°C, the SFH 4646-TV is required. Verify optical intensity, viewing angle, and mounting orientation requirements against specific application specifications.