SPMWH1228FD5WAPMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAPMS3 is a Samsung Semiconductor LM281B cool white LED in 2835 metric package (1113 case). This component operates at 6500K color temperature with 3.1V forward voltage and 150mA test current, delivering 63 lumens at 25°C. The part is classified as Not For New Designs, indicating end-of-life status. Equivalent and substitute parts are necessary to support ongoing production requirements and ensure design continuity for existing applications.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Cool	—
CCT (Correlated Color Temperature)	6500K	K
Flux @ 25°C, 150mA	63 lm (61–65 lm range)	lm
Forward Voltage (Vf) Typical	3.1V	V
Test Current	150mA	mA
Maximum Current	160mA	mA
Lumens/Watt @ 150mA	135 lm/W	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120°	°
Package / Case	1113 (2835 Metric)	—
Size / Dimension	3.50mm × 2.80mm	mm
Height - Seated (Max)	0.75mm	mm
Thermal Resistance	25°C/W	°C/W
Mounting Type	Surface Mount	—
RoHS Status	RoHS Compliant	—
MSL (Moisture Sensitivity Level)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WAPMS3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Color: White, Cool
CCT: 6500K
Package / Case: 1113 (2835 Metric)
Mounting Type: Surface Mount
Viewing Angle: 120°
CRI: 80
Test Current: 150mA
Maximum Current: 160mA
Physical Dimensions: 3.50mm × 2.80mm
Height - Seated (Max): 0.75mm
Thermal Resistance: 25°C/W
RoHS Status: RoHS Compliant
MSL: 2A (4 Weeks)

Allowable Variation Parameters:

Forward Voltage (Vf): 3.0V to 3.1V
Flux @ 25°C: 61–66 lm range
Lumens/Watt: 135–140 lm/W range
Series: LM281B, LM281B+, or LM281BZ+
Product Status: Active substitutes preferred over Not For New Designs

All substitute parts listed maintain identical mechanical compatibility and electrical operating characteristics within specified tolerances.

Parameter Comparison

Parameter	SPMWH1228FD5WAPMS3 (Main)	SPMWH1228FD5WAPMSC	SPMWH3228FD5WAP0SE	SPMWH3228FD5WAPKSE	SPMWH3228FD5WAPMSE
Series	LM281B	LM281B+	LM281BZ+	LM281BZ+	LM281BZ+
Product Status	Not For New Designs	Active	Active	Active	Active
Color	White, Cool	White, Cool	White, Cool	White, Cool	White, Cool
CCT (K)	6500K	6500K	6500K	6500K	6500K
Flux @ 25°C, 150mA (lm)	63 (61–65)	64 (62–66)	63 (61–65)	63 (61–65)	63 (61–65)
Forward Voltage (Vf) Typ (V)	3.1	3.1	3.0	3.0	3.0
Test Current (mA)	150	150	150	150	150
Maximum Current (mA)	160	160	160	160	160
Lumens/Watt @ 150mA (lm/W)	135	138	140	140	140
CRI	80	80	80	80	80
Viewing Angle (°)	120	120	120	120	120
Package / Case	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)
Size / Dimension (mm)	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80
Height - Seated Max (mm)	0.75	0.75	0.75	0.75	0.75
Thermal Resistance (°C/W)	25	25	25	25	25
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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

Direct Manufacturer Substitute: SPMWH1228FD5WAPMSC is the primary direct substitute. This LM281B+ variant maintains identical electrical and mechanical specifications with the exception of slightly improved luminous efficacy (138 lm/W versus 135 lm/W) and marginally higher flux output (64 lm versus 63 lm). Product status is Active, making this the preferred choice for ongoing production support.

Parametric Equivalents: SPMWH3228FD5WAP0SE, SPMWH3228FD5WAPKSE, and SPMWH3228FD5WAPMSE are parametric equivalents based on the LM281BZ+ series. These parts operate at 3.0V forward voltage (0.1V lower than the main part) and deliver superior luminous efficacy at 140 lm/W. All three maintain identical flux output (63 lm) and all other critical parameters. Product status is Active for all three variants.

Compliance and Certification: All substitute parts carry RoHS Compliant status and MSL 2A (4 Weeks) rating, matching the main part. ECCN and HTSUS classifications remain consistent across all variants.

Selection Basis:

For direct replacement with minimal design impact: SPMWH1228FD5WAPMSC
For improved efficiency with 0.1V lower forward voltage: SPMWH3228FD5WAP0SE, SPMWH3228FD5WAPKSE, or SPMWH3228FD5WAPMSE

All substitutes are mechanically and electrically compatible within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAPMSC be used as a direct drop-in replacement for SPMWH1228FD5WAPMS3?

A: Yes. SPMWH1228FD5WAPMSC maintains identical forward voltage (3.1V), test current (150mA), package dimensions (3.50mm × 2.80mm), and all mechanical specifications. The only differences are improved luminous efficacy (138 lm/W versus 135 lm/W) and slightly higher flux output (64 lm versus 63 lm), both within acceptable tolerance ranges.

Q: What is the difference between the LM281B+ and LM281BZ+ series?

A: The LM281B+ (SPMWH1228FD5WAPMSC) operates at 3.1V forward voltage with 135–138 lm/W efficacy. The LM281BZ+ variants (SPMWH3228 base number) operate at 3.0V forward voltage with 140 lm/W efficacy. Both series maintain identical color temperature (6500K), flux output (63 lm), and package specifications. The 0.1V voltage difference and improved efficiency of LM281BZ+ may require circuit verification in current-limited applications.

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

A: SPMWH1228FD5WAPMSC is available in Tape & Reel (TR) packaging. The three LM281BZ+ variants (SPMWH3228FD5WAP0SE, SPMWH3228FD5WAPKSE, SPMWH3228FD5WAPMSE) do not specify packaging format in the provided data. Packaging availability should be confirmed with the supplier before procurement.

Q: Can I use the LM281BZ+ parts if my circuit is designed for 3.1V forward voltage?

A: The LM281BZ+ parts operate at 3.0V forward voltage, which is 0.1V lower than the main part. In constant-current driver circuits, this voltage difference has minimal impact. In voltage-regulated circuits, the lower forward voltage results in approximately 3% less voltage drop across the LED. Circuit compatibility should be evaluated based on the specific power supply topology and current regulation method.

Q: Do all substitute parts meet the same environmental and compliance standards?

A: Yes. All substitute parts are RoHS Compliant with MSL 2A (4 Weeks) rating, matching the main part SPMWH1228FD5WAPMS3. ECCN and HTSUS classifications are identical across all variants.

Q: What is the significance of the "Not For New Designs" status on the main part?

A: This status indicates the SPMWH1228FD5WAPMS3 is end-of-life. For new product development, Samsung recommends using Active-status alternatives such as SPMWH1228FD5WAPMSC or the LM281BZ+ series. Existing designs may continue using available inventory, but long-term supply cannot be guaranteed.

Q: Are there any thermal considerations when substituting these parts?

A: All parts maintain identical thermal resistance of 25°C/W and identical package height (0.75mm maximum seated height). Thermal performance in the application is not affected by substitution. PCB layout and thermal management practices should remain unchanged.

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