SPMWH1228FD7WATMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WATMS2 is a Samsung Semiconductor LM281B neutral white LED in 2835 metric package (1113 case) rated for 4000K color temperature. This part is classified as Not For New Designs, indicating it has reached end-of-life status. Direct substitutes and parametric equivalents are available from Samsung's active product lines to support ongoing production requirements and design transitions.

Key Parameters

Parameter	Value
Color	White, Neutral
CCT (K)	4000K
Flux @ 25°C, 150mA	54lm (52lm ~ 56lm)
Forward Voltage (Vf) Typical	3.1V
Test Current	150mA
Maximum Current	160mA
Lumens/Watt @ 150mA	116 lm/W
CRI	90
Viewing Angle	120°
Package / Case	1113 (2835 Metric)
Mounting Type	Surface Mount
Size / Dimension	0.138" L x 0.110" W (3.50mm x 2.80mm)
Height - Seated (Max)	0.030" (0.75mm)
RoHS Status	RoHS Compliant
MSL	2A (4 Weeks)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Direct Manufacturer Substitutes maintain identical electrical and mechanical parameters:

Color: White, Neutral 4000K
Package: 1113 (2835 Metric)
Viewing Angle: 120°
Test Current: 150mA
Maximum Current: 160mA
CRI: 90
Mounting Type: Surface Mount
Physical dimensions and height
RoHS Compliance and MSL rating

Parametric Equivalents share the same functional characteristics but represent newer product generations with improved performance:

Color: White, Neutral 4000K
Package: 1113 (2835 Metric)
Viewing Angle: 120°
Test Current: 150mA
Maximum Current: 160mA
CRI: 90
Mounting Type: Surface Mount
Physical dimensions and height
RoHS Compliance and MSL rating

Variations in forward voltage (3.1V vs 3.0V) and lumens/watt efficiency (116 lm/W vs 120 lm/W) are within acceptable parametric equivalence for this LED category and do not preclude substitution in standard lighting applications.

Parameter Comparison

Parameter	SPMWH1228FD7WATMS2 (Main)	SPMWH1228FD7WATMSA (Direct)	SPMWH3228FD7WAT0SE (Parametric)	SPMWH3228FD7WATKSE (Parametric)	SPMWH3228FD7WATMSE (Parametric)
Series	LM281B	LM281B+	LM281BZ+	LM281BZ+	LM281BZ+
Product Status	Not For New Designs	Active	Active	Active	Active
Color	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral
CCT (K)	4000K	4000K	4000K	4000K	4000K
Flux @ 25°C, 150mA	54lm (52-56lm)	51lm (49-53lm)	54lm (52-56lm)	54lm (52-56lm)	54lm (52-56lm)
Forward Voltage (Vf) Typical	3.1V	3.1V	3.0V	3.0V	3.0V
Test Current	150mA	150mA	150mA	150mA	150mA
Maximum Current	160mA	160mA	160mA	160mA	160mA
Lumens/Watt @ 150mA	116 lm/W	110 lm/W	120 lm/W	120 lm/W	120 lm/W
CRI	90	90	90	90	90
Viewing Angle	120°	120°	120°	120°	120°
Package / Case	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.138" L x 0.110" W (3.50mm x 2.80mm)	0.138" L x 0.110" W (3.50mm x 2.80mm)	0.138" L x 0.110" W (3.50mm x 2.80mm)	0.138" L x 0.110" W (3.50mm x 2.80mm)	0.138" L x 0.110" W (3.50mm x 2.80mm)
Height - Seated (Max)	0.030" (0.75mm)	0.030" (0.75mm)	0.030" (0.75mm)	0.030" (0.75mm)	0.030" (0.75mm)
Thermal Resistance	17°C/W	25°C/W	25°C/W	25°C/W	25°C/W
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
MSL	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)

Engineering Selection Recommendations

SPMWH1228FD7WATMSA is the direct manufacturer substitute. It maintains the LM281B+ series designation and shares identical electrical and mechanical specifications with the main part. This part carries Active product status and is suitable for immediate replacement in existing designs. All compliance certifications (RoHS, MSL) are equivalent.

SPMWH3228FD7WAT0SE, SPMWH3228FD7WATKSE, and SPMWH3228FD7WATMSE are parametric equivalents representing the LM281BZ+ product generation. These parts are Active and provide improved lumens/watt efficiency (120 lm/W vs 116 lm/W) with a lower typical forward voltage (3.0V vs 3.1V). All three maintain identical package geometry, viewing angle, CRI, and compliance ratings. Selection among these three parametric equivalents depends on packaging availability and inventory requirements, as their electrical and mechanical characteristics are identical.

The thermal resistance difference (17°C/W for main part vs 25°C/W for substitutes) reflects design improvements in newer generations and does not preclude substitution in standard thermal environments.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WATMSA be used as a direct replacement for SPMWH1228FD7WATMS2?

A: Yes. SPMWH1228FD7WATMSA is a direct manufacturer substitute with identical electrical ratings (3.1V, 150mA test current), luminous flux (54lm at 25°C), color temperature (4000K neutral white), CRI (90), and package specifications (1113/2835 metric, 120° viewing angle). The primary difference is product status: the substitute is Active while the main part is Not For New Designs.

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

A: SPMWH1228FD7WATMSA maintains the LM281B+ series and preserves the 3.1V forward voltage of the original part. The parametric equivalents (LM281BZ+ series) operate at 3.0V typical forward voltage and deliver higher efficiency (120 lm/W vs 110-116 lm/W). All maintain identical package geometry, viewing angle, CRI, and current ratings. Parametric equivalents are suitable where forward voltage tolerance and efficiency improvements are acceptable.

Q: Are all substitute parts available in the same packaging format?

A: SPMWH1228FD7WATMSA is specified as Tape & Reel (TR) packaging, matching the main part. The three parametric equivalents do not specify packaging format in the provided data. All five parts share identical physical dimensions (0.138" L x 0.110" W, 3.50mm x 2.80mm) and height (0.030" / 0.75mm maximum seated height), ensuring PCB footprint compatibility.

Q: Do the substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are RoHS Compliant with MSL rating 2A (4 Weeks), matching the main part specifications. ECCN and HTSUS classifications are identical across all parts.

Q: What is the impact of the forward voltage difference (3.1V vs 3.0V)?

A: The 0.1V difference between the main part (3.1V) and parametric equivalents (3.0V) represents normal variation within LED product generations. This difference is within standard design tolerances for LED driver circuits and does not preclude substitution in applications with adequate voltage headroom.

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