SPMWHT541MD5WAPMSD LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WAPMSD is a Samsung Semiconductor LM561B series cool white LED (6500K) designed for surface mount lighting applications. This component features a 5630 package format with 4-SMD flat lead exposed pad configuration, delivering 34 lumens at 65mA test current with 2.95V forward voltage.

The SPMWHT541MD5WAPMSD carries a "Not For New Designs" product status, indicating Samsung has transitioned this model line. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and component sourcing continuity.

Substiute Parts

SPMWHT541MD5WAPMSD

Samsung Semiconductor, Inc.In Stock: 941SPMWHT541MD5WAPMSD Datasheet

Current PartRFQ

SPMWHT541MP5WAP0S5

Samsung Semiconductor, Inc.In Stock: 1237SPMWHT541MP5WAP0S5 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWHT541MD5WAPMSD is determined by strict alignment across the following critical parameters:

Mandatory Matching Criteria:

• Series family: LM561B or LM561B Plus
• Color and CCT: White, Cool 6500K
• Package type: 4-SMD, 5630 form factor
• Mounting: Surface Mount
• Forward voltage: 2.95V (typical)
• Test current: 65mA
• Viewing angle: 120°
• RoHS compliance: Yes
• MSL rating: 2A (4 Weeks)

Allowable Variation Parameters:

• Flux output: ±2 lm tolerance around 34 lm baseline
• Lumens/Watt efficiency: Higher efficiency acceptable
• Maximum current rating: Equal or higher
• Thermal resistance: Equal or lower (improved thermal performance acceptable)
• Height: Variation within PCB assembly constraints
• Product status: Active status preferred for new sourcing

The SPMWHT541MP5WAP0S5 qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

For Existing Production (SPMWHT541MD5WAPMSD):

The SPMWHT541MD5WAPMSD remains suitable for ongoing production support and maintenance applications. RoHS compliance and established supply chain documentation support continued use in existing designs. However, Samsung's "Not For New Designs" designation indicates this model will not receive future development or extended availability guarantees.

For New Design Adoption (SPMWHT541MP5WAP0S5):

The SPMWHT541MP5WAP0S5 is the recommended substitute for new product development. This part carries "Active" product status from Samsung, ensuring long-term availability and supply continuity. The LM561B Plus variant delivers improved performance metrics:

• Flux output increases from 34 lm to 35 lm (within specification tolerance)
• Efficiency improves from 177 lm/W to 183 lm/W
• Maximum current rating increases from 150 mA to 180 mA
• Thermal resistance improves from 16°C/W to 15°C/W
• Height reduces from 0.90 mm to 0.80 mm

All electrical parameters (forward voltage, test current, color temperature, CRI, viewing angle) remain identical. Both parts maintain RoHS compliance and identical MSL ratings. PCB layout compatibility is confirmed for the 5630 package footprint.

Compliance Verification:

Both parts satisfy ECCN EAR99 and HTSUS 8541.41.0000 classifications. No additional regulatory documentation is required for substitution within the same end-use application.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WAP0S5 directly replace SPMWHT541MD5WAPMSD in existing assemblies?

A: Yes. Both parts share identical electrical specifications at the 65 mA test current (2.95V forward voltage, 34–35 lm output, 80 CRI, 120° viewing angle). The 5630 package footprint is identical. The SPMWHT541MP5WAP0S5 features a 0.10 mm lower profile (0.80 mm vs. 0.90 mm), which is compatible with standard PCB assembly processes. No circuit redesign is required.

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

A: Both package descriptions refer to the 4-SMD 5630 form factor. The SPMWHT541MD5WAPMSD specifies "Flat Lead Exposed Pad," while the SPMWHT541MP5WAP0S5 specifies "Flat Leads." This terminology difference reflects Samsung's documentation updates between product generations. The physical package dimensions and soldering interface remain functionally equivalent for PCB assembly.

Q: Why does the substitute part have higher lumens/watt efficiency?

A: The SPMWHT541MP5WAP0S5 (LM561B Plus) represents an improved generation of the LM561B series. Enhanced phosphor formulation and die optimization in the Plus variant deliver 183 lm/W versus 177 lm/W in the original LM561B. This 3.4% efficiency gain occurs at identical forward voltage and test current, indicating genuine performance advancement rather than specification drift.

Q: Are there any thermal management differences?

A: The SPMWHT541MP5WAP0S5 exhibits superior thermal performance with 15°C/W thermal resistance compared to 16°C/W in the SPMWHT541MD5WAPMSD. This 6.3% improvement in thermal conductivity reduces junction temperature rise under identical operating conditions, supporting higher reliability margins in thermally constrained applications.

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

A: The SPMWHT541MD5WAPMSD is rated to 150 mA maximum, while the SPMWHT541MP5WAP0S5 is rated to 180 mA maximum. Standard operation occurs at 65 mA test current for both parts. The higher maximum rating in the substitute part provides additional design margin but does not require circuit modification. Existing current-limiting resistor values remain valid.

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

A: Yes. Both parts are supplied in Tape & Reel (TR) format on 5630 package carriers. Reel specifications, tape pitch, and component spacing are identical, ensuring compatibility with automated pick-and-place equipment and existing feeder configurations.

Q: What is the product status significance?

A: The SPMWHT541MD5WAPMSD carries "Not For New Designs" status, indicating Samsung has concluded active development and will not guarantee extended availability. The SPMWHT541MP5WAP0S5 carries "Active" status, confirming Samsung's ongoing support, supply commitment, and potential for future performance improvements. For designs with multi-year production horizons, the Active-status substitute is the appropriate choice.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS Compliant, carry identical MSL 2A (4 Weeks) moisture sensitivity ratings, and share the same ECCN EAR99 and HTSUS 8541.41.0000 classifications. No additional compliance documentation or supply chain modifications are required for substitution.