LED LM561B SPMWHT541MD5WATHSB Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WATHSB is a surface-mount LED lighting component from Samsung Semiconductor, Inc., belonging to the LM561B series. This neutral white 4000K LED is designed for general illumination applications requiring high color rendering and efficiency. The part is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. Finding equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this component is already integrated into existing systems.

Substiute Parts

SPMWHT541MD5WATHSB

Samsung Semiconductor, Inc.In Stock: 744SPMWHT541MD5WATHSB Datasheet

Current PartRFQ

SPMWHT541MP5WATMS4

Samsung Semiconductor, Inc.In Stock: 600211SPMWHT541MP5WATMS4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WATHSB is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Color specification: White, Neutral
• CCT (Correlated Color Temperature): 4000K
• Forward voltage (Vf): 2.95V nominal
• Test current: 65mA
• Viewing angle: 120°
• Package type: 4-SMD configuration
• Supplier device package: 5630
• Physical dimensions: 5.00mm × 3.00mm footprint
• Mounting type: Surface Mount
• Thermal resistance: 16°C/W
• CRI (Color Rendering Index): 80

Allowable Variation Parameters:

• Flux output at 25°C, 65mA: Acceptable range 28–34lm (original specification 28–32lm)
• Maximum current rating: May exceed 150mA (original specification)
• Lumens per watt efficiency: May exceed 156 lm/W (original specification)
• Height seated maximum: May be ≤0.90mm (original specification)
• Product status: Active status preferred over "Not For New Designs"
• RoHS compliance level: ROHS3 acceptable as upgrade from RoHS Compliant

The SPMWHT541MP5WATMS4 qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWHT541MP5WATMS4

The SPMWHT541MP5WATMS4 is the qualified substitute for SPMWHT541MD5WATHSB based on the following engineering criteria:

1. Product Status Alignment: The substitute part carries Active product status, whereas the main part is designated "Not For New Designs." This transition ensures continued supply chain availability and manufacturing support.

2. Electrical Compatibility: Both parts operate at identical forward voltage (2.95V) and test current (65mA), ensuring direct circuit compatibility without redesign of current-limiting resistors or power supply parameters.

3. Photometric Equivalence: Both parts deliver neutral white light at 4000K with CRI 80, maintaining identical color characteristics. The substitute's higher flux output (33lm vs. 30lm) and improved efficiency (172 lm/W vs. 156 lm/W) represent performance enhancements within acceptable tolerance ranges.

4. Mechanical Compatibility: Identical footprint (5.00mm × 3.00mm), package type (5630 4-SMD), and mounting method (Surface Mount) ensure direct PCB layout compatibility. The substitute's reduced height (0.80mm vs. 0.90mm) provides additional clearance margin.

5. Compliance Upgrade: The substitute meets ROHS3 compliance, representing an upgrade from RoHS Compliant status, with no compatibility degradation.

6. Thermal Performance: Identical thermal resistance (16°C/W) ensures equivalent thermal management characteristics in existing circuit designs.

Frequently Asked Questions (FAQ)

Q1: Can SPMWHT541MP5WATMS4 be used as a direct replacement for SPMWHT541MD5WATHSB without PCB modifications?

A: Yes. Both parts share identical forward voltage (2.95V), test current (65mA), footprint (5.00mm × 3.00mm), and package type (5630 4-SMD). No circuit redesign or PCB layout changes are required. The substitute can be soldered into existing PCB designs without modification.

Q2: What is the difference between "Flat Lead Exposed Pad" and "Flat Leads" package configurations?

A: Both configurations are 4-SMD packages with identical electrical and thermal performance. The primary difference is in lead geometry detail. Both are compatible with standard reflow soldering processes and provide equivalent thermal dissipation through the 16°C/W thermal resistance rating.

Q3: Why does the substitute part have higher flux output (33lm vs. 30lm) and efficiency (172 lm/W vs. 156 lm/W)?

A: The SPMWHT541MP5WATMS4 represents an enhanced variant within the LM561B Plus series, incorporating manufacturing improvements that increase light output and efficiency. These improvements are within acceptable tolerance ranges and do not affect circuit compatibility or color characteristics.

Q4: Is the reduced height of the substitute part (0.80mm vs. 0.90mm) a concern for PCB assembly?

A: No. The reduced height is advantageous, providing additional clearance margin in space-constrained applications. Standard pick-and-place equipment and reflow processes accommodate this variation without adjustment.

Q5: What is the significance of the product status change from "Not For New Designs" to "Active"?

A: "Not For New Designs" indicates the main part has reached end-of-life and Samsung is discontinuing production. "Active" status for the substitute ensures continued manufacturing, supply chain availability, and technical support. This transition is necessary for long-term production continuity.

Q6: Are there any thermal management differences between the two parts?

A: No. Both parts have identical thermal resistance (16°C/W), ensuring equivalent heat dissipation performance. Thermal design calculations and PCB thermal management strategies remain unchanged.

Q7: Does the ROHS3 compliance of the substitute affect compatibility with existing designs?

A: No. ROHS3 compliance is a regulatory upgrade that does not affect electrical, thermal, or mechanical performance. Designs compliant with RoHS Compliant specifications are fully compatible with ROHS3 components.

Q8: Can the substitute part handle higher current (180mA max vs. 150mA max)?

A: Yes. The substitute's higher maximum current rating (180mA) provides additional operational margin. However, existing circuit designs should continue operating at the original 65mA test current to maintain color and efficiency specifications.

Q9: Is the color temperature (4000K) and CRI (80) identical between both parts?

A: Yes. Both parts deliver identical neutral white light at 4000K with CRI 80, ensuring no perceptual color difference in lighting applications.

Q10: What is the MSL (Moisture Sensitivity Level) requirement for both parts?

A: Both parts carry MSL 2A (4 Weeks) rating, requiring identical moisture control and storage procedures. Standard IPC-A-610 handling protocols apply to both components.