SPMWH1228FD7WAPMS3 Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAPMS3 is a surface-mount LED lighting component from Samsung Semiconductor, Inc., classified as LM281B Cool White 6500K in the 2835 metric package. This part operates at 3.1V forward voltage with a 150mA test current, delivering 58 lumens at 25°C and 125 lumens per watt efficiency. The component features a 120° viewing angle and 90 CRI (Color Rendering Index) for color accuracy in lighting applications.

The SPMWH1228FD7WAPMS3 carries a "Not For New Designs" product status, indicating Samsung has transitioned this model out of active production. This status necessitates identification of equivalent substitute components to maintain design continuity and ensure supply chain availability for existing applications and production lines.

Substiute Parts

SPMWH1228FD7WAPMS3

Samsung Semiconductor, Inc.In Stock: 682SPMWH1228FD7WAPMS3 Datasheet

Current PartRFQ

SPMWH1228FD7WAPMSC

Samsung Semiconductor, Inc.In Stock: 1159SPMWH1228FD7WAPMSC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAPMS3 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Color specification: White, Cool 6500K CCT
• Package type: 1113 (2835 Metric) surface-mount
• Forward voltage: 3.1V nominal
• Test current: 150mA
• Viewing angle: 120°
• CRI: 90
• Mounting type: Surface Mount
• RoHS compliance status
• MSL rating: 2A (4 Weeks)

Allowable Variation Parameters:

• Flux output at 25°C: Within the specified tolerance range (56–59 lm for main part)
• Lumens/Watt efficiency: Variation acceptable within product series evolution
• Thermal resistance: Variation acceptable within package class
• Product status: Active status preferred for new supply availability

The substitute part SPMWH1228FD7WAPMSC (LM281B+ series) maintains all mandatory matching parameters while representing an evolved version within the same product family. The LM281B+ designation indicates an improved or updated variant of the LM281B series, maintaining electrical and mechanical compatibility while offering active production status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWH1228FD7WAPMSC

The SPMWH1228FD7WAPMSC is the direct equivalent substitute for the SPMWH1228FD7WAPMS3. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The substitute carries Active product status, ensuring continued availability and supply chain support. The main part's "Not For New Designs" designation indicates Samsung's transition away from this model, making the Active-status substitute the appropriate long-term component choice.

Electrical Compatibility: Both components operate at identical forward voltage (3.1V) and test current (150mA), with matching maximum current ratings (160mA). Circuit designs requiring the SPMWH1228FD7WAPMS3 require no electrical redesign when substituting the SPMWH1228FD7WAPMSC.

Optical Compatibility: Both components deliver identical color specification (White, Cool 6500K), CRI (90), and viewing angle (120°). Flux output variation (58 lm vs. 55 lm at 25°C) falls within acceptable tolerance ranges for lighting applications and represents normal product family variation.

Mechanical Compatibility: Package type, dimensions (3.50mm × 2.80mm), and maximum seated height (0.75mm) are identical. PCB footprints, pick-and-place programming, and reflow profiles require no modification.

Compliance Alignment: Both components maintain RoHS compliance and identical MSL rating (2A, 4 Weeks), ensuring equivalent handling and storage requirements.

Thermal Consideration: The substitute exhibits higher thermal resistance (25°C/W vs. 17°C/W). In thermal-critical applications operating near maximum current (160mA), thermal performance should be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can the SPMWH1228FD7WAPMSC directly replace the SPMWH1228FD7WAPMS3 without circuit modification?

A: Yes. Both components share identical forward voltage (3.1V), test current (150mA), and maximum current (160mA). No circuit redesign is required for direct substitution in existing designs.

Q: What is the difference between LM281B and LM281B+ series designations?

A: The LM281B+ represents an evolved variant within the same product family. Both maintain identical electrical and mechanical specifications for the 6500K Cool White 2835 package configuration. The "+" designation indicates Samsung's product line progression while preserving compatibility.

Q: Why does the substitute show lower flux output (55 lm vs. 58 lm)?

A: Flux variation between 53–56 lm (substitute) and 56–59 lm (main part) represents normal tolerance distribution within the product family. Both values fall within acceptable ranges for lighting applications and reflect typical LED manufacturing variation.

Q: Is the higher thermal resistance (25°C/W vs. 17°C/W) of the substitute a concern?

A: Thermal resistance variation is acceptable within the 2835 package class. For applications operating at or near maximum current (160mA) in thermally constrained environments, thermal performance should be evaluated against specific application thermal budgets. Standard lighting applications typically operate below maximum current ratings.

Q: Are storage and handling requirements identical between the main part and substitute?

A: Yes. Both components carry identical MSL rating (2A, 4 Weeks) and RoHS compliance status. Storage conditions, moisture exposure limits, and reflow process parameters remain unchanged.

Q: Can the SPMWH1228FD7WAPMSC be used in new designs?

A: Yes. The substitute carries Active product status, making it suitable for new design implementations. The main part's "Not For New Designs" status specifically recommends the substitute for new applications.

Q: Are PCB footprints and pick-and-place programming identical?

A: Yes. Identical package type (1113 / 2835 Metric), dimensions (3.50mm × 2.80mm), and maximum height (0.75mm) ensure footprint compatibility. No PCB layout or assembly programming changes are required.

Q: What is the lumens/watt efficiency difference between the two parts?

A: The main part delivers 125 lm/W while the substitute delivers 118 lm/W at 150mA test current. This 7 lm/W difference represents normal variation within the product family and does not affect circuit operation or design compatibility.