SFH 4645-UV-Z Equivalent & Substitute Parts

Part Overview

The SFH 4645-UV-Z is an infrared (IR) emitter manufactured by ams-OSRAM USA INC., designed for applications requiring 950nm wavelength emission. This component operates at 1.5V forward voltage with a maximum DC forward current of 100mA and delivers 40mW/sr radiant intensity at rated current. The device is housed in a 2-SMD, No Lead surface mount package and is classified as Active product status with ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified operating parameters of the application circuit. The SFH 4645-UV-Z has one qualified substitute part available.

Substiute Parts

SFH 4645-UV-Z

ams-OSRAM USA INC.In Stock: 1246SFH 4645-UV-Z 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 4645-UV-Z is determined by the following critical parameters:

Wavelength Compatibility: Both the main part and substitute must operate at 950nm to ensure spectral matching in optical detection circuits.

Package Compatibility: Both components must use identical or mechanically compatible package types (2-SMD, No Lead) to allow direct PCB footprint substitution.

Electrical Operating Range: The substitute part must operate within the application's voltage and current specifications. Forward voltage tolerance and maximum current ratings determine circuit compatibility.

Radiant Intensity: The substitute must deliver sufficient optical output at its rated current to meet system performance requirements.

Temperature Range: The substitute's operating temperature range must encompass or exceed the application's thermal environment.

Compliance Status: Both parts must maintain equivalent regulatory compliance (ROHS3, REACH Unaffected, EAR99).

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The SFH 4645-UV-Z remains the specified component for applications requiring the full 100mA current capability, 30° viewing angle, and extended temperature operation to 100°C.

Substitute Applicability: The SFH 4045N is suitable as a substitute only when the following conditions are met:

1. Application circuit operates at or below 70mA forward current
2. Narrower 18° viewing angle is acceptable or beneficial for the optical design
3. Operating temperature does not exceed 85°C
4. Right-angle mounting orientation (Side View) is compatible with PCB layout
5. Higher radiant intensity at lower current (90mW/sr @ 70mA) meets or exceeds optical performance requirements

Compliance Equivalence: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility in equivalent applications.

Inventory Consideration: The SFH 4045N has significantly higher inventory availability (20,778 Pcs vs. 1,140 Pcs), which may influence supply chain decisions for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4045N directly replace the SFH 4645-UV-Z on the same PCB?

A: Direct PCB replacement is not recommended without design review. While both use 2-SMD, No Lead packages, the SFH 4045N features Side View (Right Angle) mounting orientation versus the SFH 4645-UV-Z Top View orientation. This difference requires verification of PCB footprint compatibility and optical alignment in the application.

Q: What is the primary electrical difference between these parts?

A: The SFH 4645-UV-Z operates at 100mA maximum forward current with 1.5V typical forward voltage, while the SFH 4045N operates at 70mA maximum with 1.6V typical forward voltage. Applications designed for 100mA operation cannot use the SFH 4045N without circuit modification.

Q: How do the optical characteristics compare?

A: The SFH 4045N delivers higher radiant intensity (90mW/sr @ 70mA) compared to the SFH 4645-UV-Z (40mW/sr @ 100mA), but with a narrower viewing angle (18° vs. 30°). The narrower beam may be advantageous for focused applications but unsuitable for wide-angle detection requirements.

Q: Are there temperature range limitations with the substitute?

A: Yes. The SFH 4045N operates from -40°C to 85°C, while the SFH 4645-UV-Z extends to 100°C. Applications requiring operation above 85°C must use the primary part.

Q: Do both parts have equivalent regulatory compliance?

A: Yes. Both the SFH 4645-UV-Z and SFH 4045N are ROHS3 Compliant and REACH Unaffected, ensuring equivalent regulatory status for applications subject to these standards.

Q: What is the moisture sensitivity difference?

A: The SFH 4645-UV-Z has MSL 2 (1 Year shelf life), while the SFH 4045N has MSL 3 (168 Hours shelf life). The substitute requires more stringent moisture control during storage and handling.