SPMWHT541MD5WAUMSC LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WAUMSC is a Samsung Semiconductor LM561B series warm white LED designed for surface mount applications. This component operates at 3500K color temperature with a forward voltage of 2.95V and test current of 65mA, delivering 31 lumens at 25°C. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. This obsolescence necessitates identification of functionally equivalent substitute components that maintain electrical and mechanical compatibility for existing applications or redesigns.

Substiute Parts

SPMWHT541MD5WAUMSC

Samsung Semiconductor, Inc.In Stock: 700SPMWHT541MD5WAUMSC Datasheet

Current PartRFQ

SPMWHT541MP5WAU0S4

Samsung Semiconductor, Inc.In Stock: 1071SPMWHT541MP5WAU0S4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WAUMSC is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Color and CCT: White, Warm 3500K (exact match required)
• Forward Voltage (Vf): 2.95V nominal (determines circuit compatibility)
• Test Current: 65mA (baseline operating point)
• Package Type: 4-SMD, 5630 form factor (mechanical fit and thermal interface)
• Viewing Angle: 120° (optical performance)
• CRI: 80 (color rendering consistency)

Allowable Variation Parameters:

• Maximum Current: May increase (backward compatible with existing current-limiting circuits)
• Flux Output: Minor variation acceptable within manufacturing tolerance ranges
• Lumens/Watt: Efficiency improvement acceptable
• Height: Slight reduction acceptable for PCB assembly clearance
• Thermal Resistance: Lower values acceptable (improved thermal performance)

The substitute part SPMWHT541MP5WAU0S4 meets all critical matching criteria while demonstrating improved performance characteristics in maximum current rating, efficiency, and thermal properties.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWHT541MP5WAU0S4

The SPMWHT541MP5WAU0S4 is the direct functional equivalent for the obsolete SPMWHT541MD5WAUMSC. Selection is based on the following engineering criteria:

1. Electrical Compatibility: Identical forward voltage (2.95V) and test current (65mA) ensure drop-in replacement capability in existing current-limiting circuits without modification.

2. Optical Performance: Matching color temperature (3500K), CRI (80), and viewing angle (120°) preserve intended lighting characteristics and color rendering in end applications.

3. Mechanical Fit: Identical 5630 package footprint and dimensions (5.00 × 3.00mm) with reduced height (0.80mm vs. 0.90mm) ensure PCB assembly compatibility with improved clearance margins.

4. Product Status: The substitute is classified as "Active," ensuring long-term availability and supply chain continuity compared to the "Not For New Designs" status of the main part.

5. Regulatory Compliance: Both components maintain RoHS compliance and identical MSL ratings (2A, 4 Weeks), satisfying environmental and moisture handling requirements.

6. Performance Enhancement: The substitute demonstrates improved efficiency (167 lm/W vs. 162 lm/W), higher maximum current rating (180mA vs. 150mA), and superior thermal characteristics (15°C/W vs. 16°C/W), providing design margin for thermal management.

Package Lead Configuration Note: The substitute features flat leads without exposed pad, compared to the main part's flat lead with exposed pad. PCB layout verification is required to confirm thermal pad compatibility if thermal performance is critical to the application.

Frequently Asked Questions (FAQ)

Q1: Can SPMWHT541MP5WAU0S4 be used as a direct replacement for SPMWHT541MD5WAUMSC without circuit modification?

A: Yes. Both components share identical forward voltage (2.95V) and test current (65mA). Existing current-limiting resistor or driver circuits require no adjustment. The substitute's higher maximum current rating (180mA vs. 150mA) is backward compatible with circuits designed for the original part.

Q2: What is the significance of the "Flat Lead Exposed Pad" versus "Flat Leads" package difference?

A: The main part includes an exposed thermal pad for direct heat dissipation to the PCB. The substitute uses flat leads without exposed pad. If thermal management is critical, verify that the PCB layout accommodates the substitute's thermal resistance (15°C/W). The improved thermal resistance of the substitute may offset the absence of an exposed pad in many applications.

Q3: Are there any optical performance differences between the two parts?

A: No. Both components deliver identical color temperature (3500K), CRI (80), and viewing angle (120°). The substitute produces 1 lumen higher output (32lm vs. 31lm nominal) within normal manufacturing tolerance ranges and is not perceptually significant in most lighting applications.

Q4: Why is the main part marked "Not For New Designs"?

A: This designation indicates the SPMWHT541MD5WAUMSC has reached end-of-life status and Samsung Semiconductor is discontinuing production. New designs should specify the SPMWHT541MP5WAU0S4 (LM561B Plus variant) to ensure long-term component availability and supply chain stability.

Q5: Are moisture sensitivity levels identical between the two parts?

A: Yes. Both components are rated MSL 2A (4 Weeks), requiring identical storage and handling procedures. No changes to moisture control protocols are necessary when transitioning between these parts.

Q6: What is the impact of the 0.10mm height reduction on PCB assembly?

A: The substitute's lower profile (0.80mm vs. 0.90mm) provides improved clearance for adjacent components and reduces overall assembly height. This is beneficial for space-constrained applications and does not create compatibility issues with existing PCB designs.

Q7: Is the efficiency improvement (167 lm/W vs. 162 lm/W) significant for circuit design?

A: The 5 lm/W improvement represents approximately 3% higher efficiency. For applications with thermal constraints or power budget limitations, this improvement provides additional design margin. For most general lighting applications, the difference is negligible.