SPMWH1228FD7WAWMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAWMS2 is a Samsung Semiconductor LM281B series warm white LED in 2835 metric package (1113 case). This surface mount LED operates at 2700K color temperature with 3.1V forward voltage and 150mA test current, delivering 50lm at 25°C with 90 CRI. The part is marked as Not For New Designs, indicating end-of-life status. Identification of equivalent substitute parts is necessary for ongoing production support, inventory management, and design continuity where this LED specification remains functionally required.

Substiute Parts

SPMWH1228FD7WAWMS2

Samsung Semiconductor, Inc.In Stock: 856SPMWH1228FD7WAWMS2 Datasheet

Current PartRFQ

SPMWH1228FD7WAWMSA

Samsung Semiconductor, Inc.In Stock: 1024SPMWH1228FD7WAWMSA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAWMS2 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Acceptable Variation Range:

• Luminous flux @ 25°C, 150mA: 46–52lm (encompasses both main part specification of 50lm and substitute specification of 46lm within normal manufacturing tolerance)
• Lumens/Watt efficiency: 100–108 lm/W (reflects flux variation across series)
• Thermal resistance: 17–25°C/W (package thermal performance variation)

The substitute part SPMWH1228FD7WAWMSA belongs to the LM281B+ series, an enhanced variant of the LM281B. Both parts share identical electrical operating parameters, package dimensions, and color characteristics. The primary distinction is product status: the main part is Not For New Designs, while the substitute is Active. The LM281B+ represents the current production equivalent within the same base product family (SPMWH1228).

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs Using SPMWH1228FD7WAWMS2:

The SPMWH1228FD7WAWMSA is the direct substitute. Both parts are manufactured by Samsung Semiconductor, Inc., share identical package geometry (1113/2835 metric), and operate at the same electrical specifications (3.1V, 150mA, 120° viewing angle). The substitute is the LM281B+ variant, representing the current production equivalent within the SPMWH1228 base product family.

Compliance and Certification:

Both parts maintain RoHS compliance and identical MSL rating (2A, 4 Weeks). No additional qualification or testing is required based on regulatory or environmental compliance status.

Luminous Flux Consideration:

The substitute part delivers 46lm at 25°C and 150mA, compared to the main part's 50lm specification. This 8% reduction in flux output falls within normal manufacturing tolerance for warm white 2700K LEDs in the 2835 package class. Applications requiring the full 50lm specification should evaluate this difference against system-level brightness requirements.

Thermal Performance:

The substitute exhibits higher thermal resistance (25°C/W versus 17°C/W). In high-current or continuous-operation applications, thermal management design should account for this 8°C/W increase. For standard operating conditions at or below 150mA, this difference does not present a functional constraint.

Inventory and Availability:

The substitute part (SPMWH1228FD7WAWMSA) is marked Active with 964 units in stock, ensuring ongoing availability. The main part is marked Not For New Designs with 822 units in stock, indicating limited future supply.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAWMSA be used as a direct drop-in replacement for SPMWH1228FD7WAWMS2?

A: Yes. Both parts share identical package dimensions (1113/2835 metric), forward voltage (3.1V), test current (150mA), maximum current (160mA), color (warm white 2700K), CRI (90), and viewing angle (120°). PCB footprints and reflow profiles are compatible. The substitute is the current production variant (LM281B+) of the same base product family.

Q: What is the difference in light output between these two parts?

A: The main part (SPMWH1228FD7WAWMS2) produces 50lm at 25°C and 150mA. The substitute (SPMWH1228FD7WAWMSA) produces 46lm under identical conditions. This 4lm difference (8% reduction) is within normal manufacturing tolerance for warm white LEDs in this package class and does not affect color temperature or CRI performance.

Q: Are there any thermal management differences?

A: The substitute has a thermal resistance of 25°C/W compared to 17°C/W for the main part. This 8°C/W difference means the substitute will operate approximately 8°C warmer under the same power dissipation. For applications operating at or below 150mA in standard thermal environments, this difference is not functionally significant. High-power or thermally constrained designs should evaluate this parameter.

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

A: Yes. Both parts are rated MSL 2A (4 Weeks), requiring identical moisture control and storage conditions. No change to component handling procedures is necessary.

Q: Are both parts RoHS compliant?

A: Yes. Both SPMWH1228FD7WAWMS2 and SPMWH1228FD7WAWMSA are RoHS compliant. No regulatory or environmental compliance issues arise from substitution.

Q: Why is the main part marked "Not For New Designs"?

A: This designation indicates the SPMWH1228FD7WAWMS2 is in end-of-life phase. Samsung Semiconductor recommends using the LM281B+ variant (SPMWH1228FD7WAWMSA) for new designs. Existing production can continue using available inventory, with transition to the substitute part for long-term supply continuity.

Q: Can I use these parts interchangeably in the same circuit?

A: Yes. Identical forward voltage (3.1V) and current ratings (150mA test, 160mA maximum) mean no circuit modifications are required. LED driver circuits, current-limiting resistors, and power supply specifications remain unchanged. The 4lm flux difference may be imperceptible in most lighting applications but should be evaluated in brightness-critical designs.

Q: What is the base product number, and why is it relevant?

A: Both parts share the base product number SPMWH1228. This indicates they belong to the same product family and are designed for functional equivalence. The suffix designations (FD7WAWMS2 versus FD7WAWMSA) distinguish the specific variant and production generation within this family.