SPMWH3228FD5WAT0S3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH3228FD5WAT0S3 is a Samsung Semiconductor surface-mount LED in the 2835 metric package (1113 case code), emitting neutral white light at 4000K color temperature. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. Identifying equivalent and substitute parts is necessary to maintain supply chain continuity for existing applications and to transition designs to active product lines where applicable.

Key Parameters

Parameter	Value	Unit
Series	LM281BZ	—
Color	White, Neutral	—
CCT (Correlated Color Temperature)	4000K	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 per Watt @ 150mA	135 lm/W	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120°	degrees
Package / Case	1113 (2835 Metric)	—
Mounting Type	Surface Mount	—
Size / Dimension	3.50mm × 2.80mm	mm
Height - Seated (Max)	0.75mm	mm
Thermal Resistance	25°C/W	°C/W
RoHS Status	RoHS Compliant	—
MSL (Moisture Sensitivity Level)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH3228FD5WAT0S3 is determined by the following critical parameters:

Primary Substitution Criteria:

Color: White, Neutral (4000K CCT)
Package / Case: 1113 (2835 Metric)
Mounting Type: Surface Mount
Flux @ 25°C, 150mA: 63 lm (61–65 lm range)
Forward Voltage (Vf) Typical: 3.1V or equivalent
CRI: 80
Viewing Angle: 120°
Maximum Current: 160mA

Substitution Groups:

Group 1: Direct Parametric Equivalents (LM281B Series) Parts SPMWH1228FD5WAT0S3 and SPMWH1228FD5WATMS3 are parametrically equivalent to the main part. These components share identical electrical characteristics, optical output, thermal properties, and mechanical dimensions. The primary difference is the series designation (LM281B vs. LM281BZ) and packaging configuration. Both maintain the same 4000K color temperature, 63 lm flux output, 3.1V forward voltage, and 2835 package footprint.

Group 2: Active Product Alternatives (LM281BZ+ Series) Parts SPMWH3228FD5WAT0SE, SPMWH3228FD5WATKSE, and SPMWH3228FD5WATMSE represent the active product line evolution. These components operate at 3.0V forward voltage (0.1V lower than the main part) and deliver 140 lm/W efficiency (compared to 135 lm/W). All other parameters—flux output, color temperature, CRI, package, and thermal characteristics—remain identical. These parts carry "Active" product status, making them suitable for new designs and long-term supply availability.

Parameter Comparison

Parameter	SPMWH3228FD5WAT0S3 (Main)	SPMWH1228FD5WAT0S3	SPMWH1228FD5WATMS3	SPMWH3228FD5WAT0SE	SPMWH3228FD5WATKSE	SPMWH3228FD5WATMSE
Series	LM281BZ	LM281B	LM281B	LM281BZ+	LM281BZ+	LM281BZ+
Product Status	Not For New Designs	Not For New Designs	Not For New Designs	Active	Active	Active
Color	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral
CCT (K)	4000K	4000K	4000K	4000K	4000K	4000K
Flux @ 25°C, 150mA (lm)	63 (61–65)	63 (61–65)	63 (61–65)	63 (61–65)	63 (61–65)	63 (61–65)
Forward Voltage (Vf) Typical (V)	3.1	3.1	3.1	3.0	3.0	3.0
Test Current (mA)	150	150	150	150	150	150
Maximum Current (mA)	160	160	160	160	160	160
Lumens/Watt @ 150mA	135	135	135	140	140	140
CRI	80	80	80	80	80	80
Viewing Angle (°)	120	120	120	120	120	120
Package / Case	1113 (2835)	1113 (2835)	1113 (2835)	1113 (2835)	1113 (2835)	1113 (2835)
Size / Dimension (mm)	3.50 × 2.80	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	0.75
Thermal Resistance (°C/W)	25	25	25	25	25	25
RoHS Status	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
MSL	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)
Inventory (Pcs)	679	18310	37005	760	919	808

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair): SPMWH1228FD5WAT0S3 and SPMWH1228FD5WATMS3 provide direct parametric equivalence to the SPMWH3228FD5WAT0S3. Both parts maintain identical electrical performance, optical output, and thermal characteristics. SPMWH1228FD5WATMS3 offers higher inventory availability (37,005 units) and carries ROHS3 compliance certification, providing enhanced regulatory alignment for long-term support applications.

For New Designs & Long-Term Supply: The LM281BZ+ series (SPMWH3228FD5WAT0SE, SPMWH3228FD5WATKSE, SPMWH3228FD5WATMSE) is the recommended selection path. These components carry "Active" product status, ensuring sustained manufacturing support and supply chain continuity. The 0.1V reduction in forward voltage (3.0V vs. 3.1V) and 5 lm/W efficiency improvement (140 vs. 135 lm/W) provide operational benefits in power-constrained applications. All three variants maintain identical optical and thermal specifications, with selection based on packaging configuration and inventory requirements.

Compliance Considerations: All substitute parts maintain RoHS compliance and identical MSL ratings (2A, 4 Weeks). SPMWH1228FD5WATMS3 carries ROHS3 certification, offering enhanced compliance documentation for regulated industries.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAT0S3 directly replace SPMWH3228FD5WAT0S3 in existing PCB assemblies?

A: Yes. Both parts share identical electrical parameters (3.1V forward voltage, 150mA test current, 63 lm flux output), optical characteristics (4000K, 80 CRI, 120° viewing angle), and mechanical dimensions (3.50mm × 2.80mm, 0.75mm height). The 2835 package footprint is identical. No circuit modifications are required.

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

A: The provided data indicates both series operate at identical electrical and optical specifications for the 4000K neutral white configuration. The series designation reflects Samsung's internal product line classification. Both are classified as "Not For New Designs."

Q: Why should new designs use LM281BZ+ instead of LM281BZ or LM281B?

A: LM281BZ+ components carry "Active" product status, ensuring long-term manufacturing availability and supply chain support. LM281BZ and LM281B are end-of-life products. Additionally, LM281BZ+ delivers 140 lm/W efficiency compared to 135 lm/W, reducing power consumption by approximately 3.7% at equivalent light output.

Q: Is the 0.1V forward voltage difference between LM281BZ (3.1V) and LM281BZ+ (3.0V) significant?

A: The 0.1V difference is within normal LED manufacturing tolerance ranges and reflects process improvements in the LM281BZ+ generation. For series-connected LED strings, this reduction decreases total voltage drop and power dissipation. For constant-current driver applications, the difference is transparent to circuit operation.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All listed substitute parts use the 1113 (2835 metric) package with identical footprint dimensions (3.50mm × 2.80mm) and maximum seated height (0.75mm). PCB layout and reflow profiles require no modification.

Q: What is the inventory status for long-term procurement?

A: SPMWH1228FD5WATMS3 offers the highest inventory (37,005 units) among end-of-life equivalents. For active products, SPMWH3228FD5WATKSE provides 919 units. For sustained supply, active product variants (LM281BZ+) are recommended as they are subject to ongoing manufacturing.

Q: Do all parts meet the same moisture sensitivity requirements?

A: Yes. All listed parts carry MSL 2A (4 Weeks) rating, indicating identical moisture sensitivity and storage requirements. Standard dry-pack handling and reflow procedures apply uniformly across all variants.

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