SPMWH1228FD7WAVMS4 Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAVMS4 is a Samsung Semiconductor LM281B series warm white LED in 2835 metric package (1113 case). This surface mount LED operates at 3000K 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. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing alternatives for ongoing production or maintenance applications.

Substiute Parts

SPMWH1228FD7WAVMS4

Samsung Semiconductor, Inc.In Stock: 36935SPMWH1228FD7WAVMS4 Datasheet

Current PartRFQ

SPMWH1228FD7WAVMSE

Samsung Semiconductor, Inc.In Stock: 1057SPMWH1228FD7WAVMSE Datasheet

DirectRFQ

SPMWH1228FD7WAV0S4

Samsung Semiconductor, Inc.In Stock: 40960SPMWH1228FD7WAV0S4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAVMS4 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Color: White, Warm
• CCT: 3000K
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• Forward Voltage (Vf): 3.1V
• Test Current: 150mA
• CRI: 90
• Viewing Angle: 120°
• Physical Dimensions: 3.50mm × 2.80mm
• Height - Seated (Max): 0.75mm

Allowable Variation Parameters:

• Flux @ 25°C: Within the specified range (57–60lm) or equivalent range for substitute series
• Lumens per Watt: Variation acceptable within series performance specifications
• Thermal Resistance: Variation acceptable within thermal design specifications
• Product Status: Active or Not For New Designs (both acceptable for substitution purposes)
• Series: LM281B or LM281B+ (same base product family)

Two substitute parts are identified:

1. SPMWH1228FD7WAVMSE (Direct Manufacturer Substitute): LM281B+ series, active product status, identical electrical and mechanical parameters with minor thermal resistance variation.

2. SPMWH1228FD7WAV0S4 (Parametric Equivalent): LM281B series, identical specifications to main part, different packaging variant designation.

Parameter Comparison

Engineering Selection Recommendations

SPMWH1228FD7WAVMSE (LM281B+ Series): This substitute is recommended as the primary alternative. It carries Active product status, indicating ongoing manufacturer support and availability. All electrical parameters (forward voltage, test current, color temperature, CRI, viewing angle) are identical to the main part. The flux output range (55–59lm) overlaps with the main part specification (57–60lm), ensuring compatible light output. The thermal resistance increase from 17°C/W to 25°C/W requires thermal design review for applications with stringent thermal constraints. RoHS compliance and MSL rating are identical. This part is suitable for new designs and ongoing production.

SPMWH1228FD7WAV0S4 (LM281B Series): This equivalent part provides identical electrical and thermal specifications to the main part, including flux output (57–60lm), lumens per watt (127 lm/W), and thermal resistance (17°C/W). However, it carries "Not For New Designs" status, matching the main part's lifecycle position. This part is suitable for direct replacement in existing designs or maintenance applications where the main part is unavailable. The packaging variant designation (WAV0S4 vs. WAVMS4) indicates a different supplier or manufacturing batch code but does not affect electrical or mechanical compatibility.

Both substitutes are RoHS compliant and maintain identical moisture sensitivity levels, ensuring compliance with environmental and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAVMSE be used as a direct drop-in replacement for SPMWH1228FD7WAVMS4?

A: Yes. Both parts share identical electrical parameters (3.1V forward voltage, 150mA test current, 3000K color temperature, 90 CRI, 120° viewing angle) and mechanical specifications (2835 package, 3.50mm × 2.80mm dimensions, 0.75mm height). The flux output ranges overlap (55–59lm vs. 57–60lm). The thermal resistance difference (25°C/W vs. 17°C/W) must be evaluated for applications with thermal constraints. SPMWH1228FD7WAVMSE is the preferred choice due to Active product status.

Q: What is the difference between SPMWH1228FD7WAVMS4 and SPMWH1228FD7WAV0S4?

A: These parts are parametric equivalents with identical electrical and thermal specifications. Both are LM281B series with 59lm flux output, 127 lm/W efficiency, and 17°C/W thermal resistance. The difference in part number suffix (WAVMS4 vs. WAV0S4) indicates different supplier device package designations or manufacturing batches. Both carry "Not For New Designs" status. They are mechanically and electrically interchangeable.

Q: Why does SPMWH1228FD7WAVMSE show lower flux output (57lm vs. 59lm)?

A: SPMWH1228FD7WAVMSE is LM281B+ series with a specified flux range of 55–59lm at 150mA test current, compared to the LM281B series range of 57–60lm. The 57lm value falls within both ranges, confirming compatibility. The LM281B+ series achieves 123 lm/W efficiency versus 127 lm/W for LM281B, a 3% difference within normal manufacturing tolerance and series performance variation.

Q: Are all three parts suitable for new product designs?

A: SPMWH1228FD7WAVMSE (LM281B+) is the only part with Active product status and is suitable for new designs. SPMWH1228FD7WAVMS4 and SPMWH1228FD7WAV0S4 are both marked "Not For New Designs" and should be used only for existing design maintenance or replacement applications.

Q: What are the thermal design implications of using SPMWH1228FD7WAVMSE?

A: SPMWH1228FD7WAVMSE has thermal resistance of 25°C/W compared to 17°C/W for the main part. This 47% increase in thermal resistance means the LED junction will reach higher temperatures under the same operating conditions. Thermal design review is required for applications operating at elevated ambient temperatures or with high current density. PCB thermal design and heat dissipation pathways must be evaluated to ensure junction temperature remains within acceptable limits.

Q: Are all substitute parts RoHS compliant?

A: Yes. SPMWH1228FD7WAVMS4, SPMWH1228FD7WAVMSE, and SPMWH1228FD7WAV0S4 are all RoHS Compliant. All parts carry MSL 2A (4 Weeks) moisture sensitivity rating, requiring identical handling and storage protocols.

Q: Can these parts be used interchangeably in existing PCB assemblies?

A: Yes, all three parts are mechanically and electrically compatible for PCB assembly. The 2835 metric package (1113 case) dimensions are identical (3.50mm × 2.80mm, 0.75mm height), and all parts use surface mount technology. No PCB redesign is required. Thermal design review is recommended only if switching to SPMWH1228FD7WAVMSE due to its higher thermal resistance.