LED LM561B SPMWHT541MD5WATKS2 Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WATKS2 is a surface-mount LED from Samsung Semiconductor's LM561B series, designed for neutral white lighting applications at 4000K color temperature. This component delivers 29 lumens at 65mA test current with a forward voltage of 2.95V and features a 120° viewing angle in a compact 5630 package format.

The SPMWHT541MD5WATKS2 carries a "Not For New Designs" product status, indicating Samsung has transitioned this model to end-of-life. Organizations requiring this LED for new production runs or design revisions must identify functionally equivalent alternatives that maintain electrical and mechanical compatibility while meeting current compliance standards.

Substiute Parts

SPMWHT541MD5WATKS2

Samsung Semiconductor, Inc.In Stock: 952SPMWHT541MD5WATKS2 Datasheet

Current PartRFQ

SPMWHT541MP5WATMS4

Samsung Semiconductor, Inc.In Stock: 600211SPMWHT541MP5WATMS4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWHT541MD5WATKS2 is determined by strict alignment across the following critical parameters:

Electrical Compatibility:

• Color and CCT must be White, Neutral at 4000K
• Forward voltage must be 2.95V (typical)
• Test current rating must support 65mA operation
• CRI must be 80 or higher
• Lumens output at 65mA must meet or exceed 29 lm

Mechanical Compatibility:

• Package type must be 4-SMD with flat leads in 5630 format
• Physical dimensions must be 5.00mm × 3.00mm
• Seated height must not exceed 0.90mm
• Thermal resistance must be 16°C/W

Regulatory & Supply Chain Compatibility:

• RoHS compliance status must be RoHS Compliant or ROHS3 Compliant
• MSL rating must be 2A (4 Weeks) or equivalent
• Product status should be Active (preferred) or equivalent

The SPMWHT541MP5WATMS4 meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement in Active Production:

The SPMWHT541MP5WATMS4 is the qualified substitute for the SPMWHT541MD5WATKS2. This recommendation is based on the following engineering factors:

1. Product Status Alignment: The substitute carries Active product status, ensuring continued availability and supply chain stability. The main part's "Not For New Designs" designation necessitates this transition.

2. Electrical Equivalence: Both components operate at identical forward voltage (2.95V) and test current (65mA), enabling direct circuit compatibility without modification to drive electronics or current-limiting resistor networks.

3. Optical Performance: The substitute delivers 33 lumens at the standard 65mA test point, exceeding the main part's 29-lumen specification. This performance improvement is attributable to the LM561B Plus series enhancement. CRI and viewing angle remain identical, preserving color rendering and light distribution characteristics.

4. Mechanical Fit: Identical footprint dimensions (5.00mm × 3.00mm) and thermal resistance (16°C/W) confirm PCB layout and thermal management compatibility. The substitute's reduced seated height (0.80mm vs. 0.90mm) provides additional design margin for clearance-constrained applications.

5. Regulatory Compliance: The substitute achieves ROHS3 Compliant status, meeting or exceeding the main part's RoHS Compliant requirement. Moisture sensitivity level (2A, 4 Weeks) matches, ensuring identical handling and storage protocols.

6. Efficiency Gain: The substitute achieves 172 lm/W versus the main part's 151 lm/W, representing a 13.9% efficiency improvement. This translates to reduced power consumption for equivalent light output.

No design modifications, PCB layout changes, or reflow profile adjustments are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the SPMWHT541MP5WATMS4 be used as a direct drop-in replacement for the SPMWHT541MD5WATKS2?

A: Yes. Both components share identical forward voltage (2.95V), test current (65mA), package footprint (5630, 5.00mm × 3.00mm), and thermal resistance (16°C/W). No circuit modifications or PCB layout changes are necessary.

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

A: Both designations refer to the same 4-SMD 5630 package format with surface-mount leads. The terminology variation reflects different manufacturer documentation conventions but does not indicate functional or mechanical differences relevant to substitution.

Q: Why does the substitute produce more lumens (33 lm vs. 29 lm) at the same test current?

A: The SPMWHT541MP5WATMS4 belongs to Samsung's LM561B Plus series, which incorporates enhanced LED die technology and phosphor formulation compared to the standard LM561B series. This improvement is intentional and does not affect compatibility.

Q: Will the lower seated height (0.80mm vs. 0.90mm) of the substitute cause any issues?

A: No. The substitute's reduced height provides additional clearance margin and is fully compatible with existing PCB designs. No design adjustments are required.

Q: Are the RoHS compliance levels equivalent?

A: The substitute's ROHS3 Compliant status exceeds the main part's RoHS Compliant requirement. ROHS3 represents a higher compliance standard and is fully backward-compatible with RoHS-compliant applications.

Q: Can I use the substitute in designs originally specified for the main part?

A: Yes. Electrical, mechanical, and regulatory parameters align completely. The substitute's improved efficiency and higher lumen output represent performance enhancements with no compatibility concerns.

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

A: The substitute is rated for 180mA maximum current versus the main part's 150mA. This higher rating provides additional operational margin and does not affect standard 65mA operation. Existing current-limiting circuits require no modification.

Q: Are there any thermal management differences between the two parts?

A: No. Both components have identical thermal resistance (16°C/W). Thermal design calculations and heat dissipation strategies remain unchanged.

Q: How should I handle moisture sensitivity during assembly?

A: Both parts carry MSL 2A (4 Weeks) rating. Identical moisture handling, baking, and storage protocols apply. No changes to supply chain procedures are required.