Equivalent & Substitute Parts for SPMWH1228FD5WATKS2

Part Overview

The SPMWH1228FD5WATKS2 is a Samsung Semiconductor LM281B series LED lighting component in 2835 metric package (1113 case). This surface mount LED operates at neutral white 4000K color temperature with 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary to support existing designs, maintain production continuity, and enable transition to active product lines.

Substiute Parts

SPMWH1228FD5WATKS2

Samsung Semiconductor, Inc.In Stock: 810SPMWH1228FD5WATKS2 Datasheet

Current PartRFQ

SPMWH1228FD5WATKSA

Samsung Semiconductor, Inc.In Stock: 8366SPMWH1228FD5WATKSA Datasheet

DirectRFQ

SPMWH3228FD5WAT0SC

Samsung Semiconductor, Inc.In Stock: 1031SPMWH3228FD5WAT0SC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATKSC

Samsung Semiconductor, Inc.In Stock: 1205SPMWH3228FD5WATKSC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATMSC

Samsung Semiconductor, Inc.In Stock: 1033SPMWH3228FD5WATMSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WATKS2 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Color: White, Neutral (fixed requirement)
• CCT: 4000K (fixed requirement)
• Package / Case: 1113 (2835 Metric) (fixed requirement)
• Mounting Type: Surface Mount (fixed requirement)
• CRI: 80 (fixed requirement)
• Viewing Angle: 120° (fixed requirement)
• Current - Test: 150mA (fixed requirement)
• Current - Max: 160mA (fixed requirement)
• Size / Dimension: 3.50mm × 2.80mm (fixed requirement)
• Height - Seated (Max): 0.75mm (fixed requirement)
• Thermal Resistance: 25°C/W (fixed requirement)
• RoHS Status: RoHS Compliant (fixed requirement)
• MSL: 2A (4 Weeks) (fixed requirement)

Allowable Variation Parameters:

• Series: LM281B, LM281B+, LM281BZ+ (same base product family)
• Voltage - Forward (Typ): 3.0V to 3.1V (within LED forward voltage tolerance)
• Flux @ 25°C: 57–62lm range (within specified tolerance band)
• Lumens/Watt: 127–131 lm/W (efficiency variation within product family)
• Product Status: Active preferred over "Not For New Designs"

Substitute parts must maintain identical mechanical fit, electrical operating point compatibility, and thermal characteristics while offering improved product status or enhanced performance metrics within the allowable parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitute (Recommended for Immediate Replacement):

SPMWH1228FD5WATKSA is the primary direct substitute. This part maintains identical electrical and mechanical specifications while offering Active product status. The LM281B+ series represents an incremental improvement over the LM281B, with flux output increased to 60lm (58–62lm range) and efficiency improved to 129 lm/W. Forward voltage remains at 3.1V, ensuring drop-in compatibility with existing circuit designs. RoHS compliance and MSL rating are identical. This part is suitable for immediate production transition.

Parametric Equivalents (Alternative Options):

SPMWH3228FD5WAT0SC, SPMWH3228FD5WATKSC, and SPMWH3228FD5WATMSC are parametric equivalents from the LM281BZ+ series. These parts maintain all critical mechanical and thermal parameters. The primary difference is forward voltage reduced to 3.0V (from 3.1V), which reduces power dissipation by approximately 3% at 150mA test current. Efficiency is improved to 131 lm/W. All three LM281BZ+ variants are Active status products with identical RoHS and MSL compliance. These parts are suitable where lower forward voltage operation is acceptable or beneficial.

Product Status Consideration:

The main part SPMWH1228FD5WATKS2 carries "Not For New Designs" status, indicating end-of-life classification. All substitute parts listed carry Active status, supporting long-term design continuity and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATKSA be used as a direct replacement for SPMWH1228FD5WATKS2?

A: Yes. SPMWH1228FD5WATKSA is a direct substitute with identical mechanical fit, thermal characteristics, and electrical operating parameters. The part is pin-compatible and requires no circuit modification. The LM281B+ series offers improved flux output (60lm vs. 59lm) and efficiency (129 lm/W vs. 127 lm/W) while maintaining 3.1V forward voltage.

Q: What is the difference between the direct substitute and parametric equivalents?

A: SPMWH1228FD5WATKSA (direct substitute) maintains 3.1V forward voltage identical to the main part. The LM281BZ+ parametric equivalents (SPMWH3228 variants) operate at 3.0V forward voltage, reducing power dissipation by approximately 3% at 150mA. All parts share identical package, thermal resistance, viewing angle, and CRI specifications. The choice depends on circuit design tolerance for forward voltage variation.

Q: Are all substitute parts mechanically compatible with existing PCB layouts?

A: Yes. All substitute parts use the 1113 (2835 Metric) package with identical dimensions (3.50mm × 2.80mm) and maximum seated height (0.75mm). No PCB redesign or footprint modification is required.

Q: Do the substitute parts maintain RoHS compliance?

A: Yes. All substitute parts are RoHS Compliant with identical MSL rating of 2A (4 Weeks). Compliance certifications are maintained across all listed alternatives.

Q: What is the flux output tolerance for substitute parts?

A: SPMWH1228FD5WATKSA operates within 58–62lm range (nominal 60lm). The LM281BZ+ parametric equivalents operate within 57–61lm range (nominal 59lm). Both ranges overlap with the main part specification (57–61lm), ensuring photometric compatibility.

Q: Can forward voltage difference between 3.1V and 3.0V affect circuit performance?

A: Forward voltage difference of 0.1V at 150mA represents approximately 3% power reduction in the LM281BZ+ variants. This difference is within typical LED forward voltage tolerance and does not affect luminous output or color characteristics. Circuit designs with current-limiting resistors or constant-current drivers will automatically compensate for this variation.

Q: Which substitute part should be selected for new production?

A: SPMWH1228FD5WATKSA is recommended for new production as the direct substitute. It maintains all electrical and mechanical specifications of the main part while offering Active product status and improved efficiency. If lower forward voltage operation is required, any of the three LM281BZ+ variants (SPMWH3228 series) are suitable alternatives.