LED LM561B SPMWHT541MD5WATMSC Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WATMSC is a surface-mount LED lighting component from the Samsung Semiconductor LM561B series, featuring neutral white 4000K color temperature. This part is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. For applications requiring continued supply or new design implementations, equivalent substitute parts with compatible electrical and mechanical specifications are available within the LM561B product family.

Substiute Parts

SPMWHT541MD5WATMSC

Samsung Semiconductor, Inc.In Stock: 1112SPMWHT541MD5WATMSC Datasheet

Current PartRFQ

SPMWHT541MP5WATMS4

Samsung Semiconductor, Inc.In Stock: 600211SPMWHT541MP5WATMS4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WATMSC is determined by strict equivalence across the following critical parameters:

Electrical Compatibility:

• Color and correlated color temperature (CCT): White, Neutral 4000K
• Forward voltage (Vf): 2.95V typical
• Test current: 65mA
• Luminous flux range: 30–34 lm at 25°C, 65mA
• CRI: 80 minimum
• Viewing angle: 120°

Mechanical Compatibility:

• Package type: 4-SMD, 5630 form factor
• Mounting: Surface mount
• Dimensions: 5.00mm × 3.00mm footprint
• Height: ≤0.90mm seated maximum

Compliance & Environmental:

• RoHS compliance required
• MSL rating: 2A or better
• ECCN and HTSUS classifications must align

The substitute part SPMWHT541MP5WATMS4 meets all these criteria and is drawn from the same LM561B base product family, ensuring functional and physical interchangeability in existing designs.

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair): The SPMWHT541MP5WATMS4 is a direct substitute for the SPMWHT541MD5WATMSC in applications currently using the main part. Both components share identical electrical characteristics at the specified test current (65mA), matching forward voltage, color temperature, and CRI. The substitute exhibits a marginal improvement in luminous efficacy (172 lm/W vs. 167 lm/W) and higher maximum current rating (180mA vs. 150mA), which does not compromise compatibility in existing circuits designed for the original part.

For New Designs: The SPMWHT541MP5WATMS4 is the recommended choice due to its "Active" product status. The main part (SPMWHT541MD5WATMSC) is designated "Not For New Designs" and should not be selected for new applications. The substitute part is from the LM561B Plus series, offering improved performance metrics while maintaining full electrical and mechanical compatibility.

Compliance Considerations: Both parts are RoHS compliant. The substitute carries ROHS3 certification, representing the current regulatory standard. Both parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, ensuring equivalent export and tariff treatment.

Physical Integration: The substitute part has a maximum seated height of 0.80mm compared to 0.90mm for the main part. This represents a 0.10mm reduction and is compatible with existing PCB layouts and assembly processes. The 5630 package footprint and 5.00mm × 3.00mm dimensions are identical, ensuring direct PCB placement compatibility.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WATMS4 be used as a direct replacement for SPMWHT541MD5WATMSC in existing production?

A: Yes. Both parts operate at identical forward voltage (2.95V) and test current (65mA), produce equivalent luminous flux (32–33 lm at 25°C, 65mA), and share the same 5630 package footprint. The substitute is physically and electrically interchangeable in existing designs without circuit modification.

Q: What is the difference between "Flat Lead Exposed Pad" and "Flat Leads" package descriptions?

A: Both designations refer to the 4-SMD, 5630 package configuration. The main part specifies "Flat Lead Exposed Pad," while the substitute specifies "Flat Leads." Both are compatible with standard surface-mount assembly processes and PCB layouts designed for the 5630 form factor. The functional difference is negligible for thermal and electrical performance in typical applications.

Q: Why is the main part marked "Not For New Designs"?

A: This designation indicates the SPMWHT541MD5WATMSC has reached end-of-life status in Samsung's product portfolio. New designs should utilize the SPMWHT541MP5WATMS4 (LM561B Plus series), which is actively manufactured and supported. Existing designs may continue using available inventory of the original part or transition to the substitute.

Q: Are there differences in luminous efficacy between the two parts?

A: The substitute (SPMWHT541MP5WATMS4) achieves 172 lm/W compared to 167 lm/W for the main part. This 3% improvement reflects manufacturing advances in the LM561B Plus series. At the standard test current of 65mA, both parts produce luminous flux within the 30–34 lm specification range, ensuring equivalent brightness in practical applications.

Q: What is the maximum current rating difference, and does it affect compatibility?

A: The main part is rated for 150mA maximum current, while the substitute is rated for 180mA. This higher rating on the substitute does not affect compatibility. Existing designs operating at or below 150mA will function identically with either part. The higher rating on the substitute provides additional design margin for new applications.

Q: Are moisture sensitivity levels identical?

A: Yes. Both parts carry MSL 2A (4 Weeks) rating, indicating identical moisture sensitivity and storage requirements. Handling, storage, and reflow procedures are equivalent for both components.

Q: Do the parts have the same thermal resistance?

A: Yes. Both parts specify 16°C/W thermal resistance, ensuring identical thermal performance in PCB thermal management calculations and thermal modeling.

Q: Is the 0.10mm height difference significant for PCB assembly?

A: No. The substitute's maximum seated height of 0.80mm versus 0.90mm for the main part represents a 0.10mm reduction. This is within standard PCB assembly tolerances and does not affect placement, reflow, or clearance in typical designs. Both parts are compatible with existing PCB layouts.