SPMWH1228FD7WAWMS3 Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAWMS3 is a surface-mount LED from Samsung Semiconductor's LM281B series, specified for warm white lighting applications at 2700K color temperature. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. The LM281B series represents an earlier generation of 2835 metric package LEDs. Organizations currently using this part in active production or maintenance applications require equivalent alternatives that maintain electrical and mechanical compatibility while offering current product status and supply availability.

Substiute Parts

SPMWH1228FD7WAWMS3

Samsung Semiconductor, Inc.In Stock: 76995SPMWH1228FD7WAWMS3 Datasheet

Current PartRFQ

SPMWH1228FD7WAWMSC

Samsung Semiconductor, Inc.In Stock: 1083SPMWH1228FD7WAWMSC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH1228FD7WAWMS3 is determined by strict alignment of the following critical parameters:

Mandatory Compatibility Parameters:

• Color specification: White, Warm
• CCT (Correlated Color Temperature): 2700K
• Package type: 1113 (2835 Metric)
• Mounting type: Surface Mount
• Forward voltage (Vf): 3.1V nominal
• Test current: 150mA
• Maximum current rating: 160mA
• Viewing angle: 120°
• CRI (Color Rendering Index): 90

Acceptable Variation Parameters:

• Luminous flux @ 25°C, 150mA: Range 52–56 lm (specification tolerance)
• Lumens per watt efficiency: Variation acceptable within thermal and electrical constraints
• Thermal resistance: Variation acceptable if thermal management design accommodates the difference
• Product status: Active status preferred for new supply assurance

The substitute part SPMWH1228FD7WAWMSC meets all mandatory compatibility parameters and represents the direct successor within Samsung's LM281B product family.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWH1228FD7WAWMSC

The SPMWH1228FD7WAWMSC is the direct equivalent for SPMWH1228FD7WAWMS3 applications. Selection of this substitute is based on the following engineering factors:

1. Product Status Alignment: The substitute carries Active product status, ensuring continued supply availability and manufacturing support from Samsung Semiconductor. The main part's "Not For New Designs" classification indicates end-of-life status with no guarantee of future availability.

2. Electrical Compatibility: Both parts operate at identical forward voltage (3.1V), test current (150mA), and maximum current (160mA). Circuit designs requiring these electrical parameters require no modification.

3. Optical Compatibility: Both parts deliver 2700K warm white light with 90 CRI. The luminous flux difference (54 lm vs. 49 lm at 150mA) falls within the specified tolerance range of the main part (52–56 lm). This 9.2% flux reduction is within normal manufacturing variation and does not constitute a functional incompatibility.

4. Mechanical Compatibility: Identical package dimensions (1113/2835 metric), mounting type (surface mount), and PCB footprint enable direct substitution without circuit board redesign.

5. Compliance Status: Both parts meet RoHS requirements and carry identical MSL ratings (2A, 4 Weeks), ensuring equivalent handling and storage protocols.

6. Thermal Consideration: The substitute exhibits higher thermal resistance (25°C/W vs. 17°C/W). Thermal management designs must accommodate this 47% increase. Applications with marginal thermal headroom require thermal analysis to confirm acceptable junction temperature operation.

Selection Criteria Summary: Use SPMWH1228FD7WAWMSC for all new procurement and design activities. For existing designs using SPMWH1228FD7WAWMS3, substitution is electrically and mechanically valid provided thermal design margins accommodate the increased thermal resistance.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAWMSC be used as a direct drop-in replacement for SPMWH1228FD7WAWMS3?

A: Yes, for electrical and mechanical compatibility. Both parts share identical forward voltage (3.1V), test current (150mA), package dimensions (3.50 × 2.80 × 0.75 mm), and optical properties (2700K, 90 CRI, 120° viewing angle). No circuit modifications are required. However, thermal design must be verified, as the substitute has higher thermal resistance (25°C/W vs. 17°C/W).

Q: What is the luminous flux difference between these parts?

A: The main part specifies 54 lm at 25°C and 150mA (tolerance 52–56 lm). The substitute specifies 49 lm at the same conditions (tolerance 47–51 lm). The 5 lm difference represents a 9.2% reduction. Both values fall within normal manufacturing tolerance for 2835 metric LEDs and do not constitute incompatibility.

Q: Why does the substitute have higher thermal resistance?

A: The SPMWH1228FD7WAWMSC (LM281B+ series) exhibits 25°C/W thermal resistance compared to 17°C/W for the SPMWH1228FD7WAWMS3 (LM281B series). This reflects design differences between the two series generations. Thermal management designs must account for this difference through adequate PCB copper area, thermal vias, or heat sinking as required by the application.

Q: Are there any color or brightness differences I should expect?

A: No. Both parts deliver identical 2700K warm white color temperature and 90 CRI. The luminous flux difference (54 lm vs. 49 lm) is within specification tolerance and will not produce perceptible color or brightness shifts in typical lighting applications.

Q: What is the product status difference, and why does it matter?

A: The main part carries "Not For New Designs" status, indicating Samsung has discontinued active development and may limit future supply. The substitute carries "Active" status, ensuring continued manufacturing and supply availability. For production applications requiring long-term component availability, the substitute is the appropriate choice.

Q: Are both parts RoHS compliant?

A: Yes. The main part is ROHS3 compliant, and the substitute is RoHS compliant. Both meet environmental and regulatory requirements for electronic component use in regulated markets.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both parts carry MSL 2A rating with a 4-week floor life. Identical handling, storage, and reflow protocols apply to both components.

Q: Can I use the substitute in high-temperature applications?

A: Both parts are rated for identical maximum current (160mA) and forward voltage (3.1V). However, the substitute's higher thermal resistance (25°C/W) means junction temperature will be higher at the same ambient temperature and current. Verify that your thermal design accommodates this difference and that the resulting junction temperature remains within the LED's rated operating range.

Q: Is the 2835 metric package the same as the 1113 package designation?

A: Yes. "1113 (2835 Metric)" indicates the same physical package. The designation "2835" refers to the metric dimensions (2.8 mm × 3.5 mm), and "1113" is an alternative naming convention. Both parts use identical package geometry and PCB footprint.