SFH 4646-UV Equivalent & Substitute Parts

Part Overview

The SFH 4646-UV is an Infrared (IR) Emitter manufactured by ams-OSRAM USA INC., classified as a MIDLED series component. This surface mount device operates at 950nm wavelength with a forward current rating of 70mA and typical forward voltage of 1.6V. The component features a 20° viewing angle in a side-view orientation and is housed in a 2-SMD, No Lead package. The SFH 4646-UV maintains Active product status and is ROHS3 Compliant with REACH Unaffected classification. Substitute parts are identified when equivalent electrical performance, wavelength specification, and mounting compatibility are maintained across alternative manufacturer offerings or product series variants.

Substiute Parts

SFH 4646-UV

ams-OSRAM USA INC.In Stock: 834SFH 4646-UV Datasheet

Current PartRFQ

SFH 4045N

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

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SFH 4646-UV are identified based on the following critical parameters that must align for functional equivalence:

Mandatory Matching Parameters:

• Wavelength: 950nm
• Current - DC Forward (If) (Max): 70mA
• Voltage - Forward (Vf) (Typ): 1.6V
• Package / Case: 2-SMD, No Lead
• Mounting Type: Surface Mount
• Type: Infrared (IR) Emitter
• Manufacturer: ams-OSRAM USA INC.

Allowable Variation Parameters:

• Viewing Angle: Tolerance within optical design constraints
• Operating Temperature Range: Extended or equivalent ranges acceptable
• Moisture Sensitivity Level (MSL): Variation acceptable based on storage and handling requirements
• Radiant Intensity (Ie): Additional specification data acceptable
• Series designation: Different series acceptable if electrical and mechanical parameters match

The SFH 4045N qualifies as a substitute based on matching wavelength (950nm), forward current (70mA), forward voltage (1.6V), package type (2-SMD, No Lead), and surface mount orientation. Variations in viewing angle (18° vs. 20°), operating temperature upper limit (85°C vs. 100°C), and MSL rating (3 vs. 2) are within acceptable substitution parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

Both the SFH 4646-UV and SFH 4045N maintain Active product status with ROHS3 Compliance and REACH Unaffected classification, confirming regulatory alignment for current applications. Selection between these components is determined by specific application requirements:

SFH 4646-UV Selection Criteria:

• Applications requiring extended operating temperature range to 100°C
• Designs with 20° viewing angle optical specifications
• Environments with standard moisture handling (MSL 2, 1 Year storage)

SFH 4045N Selection Criteria:

• Applications operating within -40°C to 85°C temperature range
• Designs compatible with 18° viewing angle specifications
• Applications where radiant intensity specification (90mW/sr @ 70mA) is required for performance validation
• Designs utilizing right-angle mounting orientation

Both components share identical electrical characteristics (70mA forward current, 1.6V forward voltage, 950nm wavelength) and package configuration (2-SMD, No Lead), ensuring circuit-level compatibility when thermal and optical requirements align with specified parameters.

Frequently Asked Questions (FAQ)

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

A: Direct replacement is possible when the application operating temperature does not exceed 85°C and the 18° viewing angle is compatible with the optical design. The SFH 4646-UV supports operation to 100°C, which the SFH 4045N does not. Verify thermal requirements before substitution.

Q: What is the significance of the viewing angle difference (20° vs. 18°)?

A: Viewing angle defines the half-angle of the light emission cone. The SFH 4646-UV provides a 20° viewing angle, while the SFH 4045N provides 18°. This difference affects optical beam width and intensity distribution. Applications with specific optical alignment requirements must account for this variation.

Q: Are there packaging differences between these components?

A: Both components use 2-SMD, No Lead packages suitable for surface mount assembly. The SFH 4045N specifies "Right Angle" mounting orientation, while the SFH 4646-UV specifies standard side-view orientation. Verify PCB layout compatibility with the mounting orientation before selection.

Q: What does the MSL rating difference indicate?

A: Moisture Sensitivity Level (MSL) 2 (1 Year) for the SFH 4646-UV allows one year of storage under controlled conditions. MSL 3 (168 Hours) for the SFH 4045N requires more frequent reflow processing or shorter storage periods. Select based on supply chain and manufacturing schedules.

Q: Are both components compliant with current regulatory requirements?

A: Yes. Both the SFH 4646-UV and SFH 4045N are ROHS3 Compliant and REACH Unaffected, meeting current environmental and hazardous substance regulations.

Q: What is the radiant intensity specification, and why does only the SFH 4045N list it?

A: Radiant intensity (90mW/sr @ 70mA) measures the optical power output per unit solid angle. The SFH 4045N provides this specification; the SFH 4646-UV does not. This specification is useful for optical performance validation but does not affect electrical substitution compatibility.