SPMWHT541MD5WAUMSB LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WAUMSB is a Samsung Semiconductor LM561B series warm white LED (3500K) designed for surface mount applications in LED lighting systems. This component operates at 2.95V forward voltage with a 65mA test current, delivering 29 lumens at 151 lm/W efficiency. The part is classified as "Not For New Designs," indicating it has been superseded in Samsung's product portfolio. Organizations currently using this component in active production or maintenance applications require qualified substitute parts that maintain electrical and mechanical compatibility while offering improved performance characteristics or active product status.

Substiute Parts

SPMWHT541MD5WAUMSB

Samsung Semiconductor, Inc.In Stock: 982SPMWHT541MD5WAUMSB Datasheet

Current PartRFQ

SPMWHT541MP5WAU0S4

Samsung Semiconductor, Inc.In Stock: 1071SPMWHT541MP5WAU0S4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWHT541MD5WAUMSB is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Series family: LM561B or LM561B Plus
• Color specification: White, Warm
• Correlated Color Temperature (CCT): 3500K
• Forward voltage (Vf): 2.95V (nominal)
• Test current: 65mA
• Viewing angle: 120°
• Mounting type: Surface Mount
• Package footprint: 5630 (5.00mm × 3.00mm)
• CRI: 80 or higher
• RoHS compliance: Required

Allowable Variation Parameters:

• Luminous flux: May increase (higher lm values indicate improved performance)
• Lumens/Watt efficiency: May increase
• Maximum current rating: May increase (backward compatible)
• Height - Seated: May decrease (improved thermal profile)
• Thermal resistance: May decrease (improved thermal performance)
• Product status: Active status preferred over "Not For New Designs"

The substitute part SPMWHT541MP5WAU0S4 qualifies as a direct substitute because it maintains all mandatory parameters while offering measurable improvements in flux output, efficiency, thermal characteristics, and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWHT541MP5WAU0S4

The SPMWHT541MP5WAU0S4 is the qualified substitute for SPMWHT541MD5WAUMSB applications. Selection rationale is based on the following engineering factors:

Compliance & Status:

• The main part carries "Not For New Designs" status, indicating Samsung has transitioned this component to end-of-life management
• The substitute maintains active product status, ensuring long-term supply chain availability and manufacturing consistency
• Both parts are RoHS Compliant and carry identical MSL ratings (2A, 4 Weeks)

Electrical Compatibility:

• Forward voltage (2.95V) and test current (65mA) are identical, ensuring direct circuit compatibility
• Color temperature (3500K) and CRI (80) are unchanged, preserving optical performance
• Maximum current rating increases from 150mA to 180mA, providing additional design margin without requiring circuit modification

Mechanical Compatibility:

• Footprint dimensions (5.00mm × 3.00mm) are identical
• Height reduction (0.90mm to 0.80mm) improves PCB clearance and thermal coupling to substrate
• Package lead configuration remains compatible with existing solder patterns

Performance Enhancement:

• Luminous flux increases 10.3% (29lm to 32lm at 65mA test current)
• Efficiency improves 10.6% (151 lm/W to 167 lm/W)
• Thermal resistance decreases 6.3% (16°C/W to 15°C/W), reducing junction temperature under identical power dissipation

Supply Chain Consideration:

• Substitute inventory: 968 Pcs in stock (vs. 961 Pcs for main part)
• Active production status ensures continued availability for future procurement

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WAU0S4 be used as a direct drop-in replacement for SPMWHT541MD5WAUMSB?

A: Yes. Both parts share identical forward voltage (2.95V), test current (65mA), color temperature (3500K), CRI (80), viewing angle (120°), and footprint (5.00mm × 3.00mm). The substitute requires no circuit modifications and is mechanically compatible with existing PCB layouts.

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

A: Both designations refer to 4-SMD surface mount packages with 5630 footprints. The primary difference is thermal pad configuration. The substitute's "Flat Leads" variant maintains electrical and mechanical compatibility while offering improved thermal characteristics (15°C/W vs. 16°C/W).

Q: Will the increased maximum current rating (180mA vs. 150mA) affect circuit operation?

A: No. The increased maximum current rating does not change operating conditions. The test current remains 65mA for both parts. The higher maximum rating provides additional design margin and allows for future current increases if required by application changes.

Q: Why does the substitute have higher luminous flux (32lm vs. 29lm)?

A: The LM561B Plus variant incorporates manufacturing improvements that increase light output efficiency. At identical test current (65mA), the substitute delivers 10.3% more lumens, resulting in 10.6% higher efficiency (167 lm/W vs. 151 lm/W).

Q: Are there any moisture sensitivity or storage differences between the main part and substitute?

A: No. Both parts carry identical MSL ratings (2A, 4 Weeks), requiring the same moisture control and storage protocols.

Q: What is the significance of the main part's "Not For New Designs" status?

A: This status indicates Samsung has discontinued active development and recommends against using this part in new product designs. However, it remains available for existing production and maintenance applications. The substitute's "Active" status ensures continued manufacturing support and supply chain stability.

Q: Can the substitute be used in applications currently using the main part?

A: Yes. The substitute is fully compatible with all existing applications. The improved performance characteristics (higher flux, better efficiency, lower thermal resistance) provide measurable benefits without requiring any design changes.