SPMWH1228FD5WAWMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAWMS3 is a Samsung Semiconductor LM281B 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 59 lumens at 25°C with 127 lm/W efficiency and 80 CRI. The part carries a "Not For New Designs" product status, indicating Samsung has transitioned this series to newer alternatives. Equivalent and substitute parts are necessary for ongoing production support, inventory management, and design flexibility when the primary part becomes unavailable or when upgraded performance characteristics are required.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Warm	—
CCT (Correlated Color Temperature)	2700K	K
Flux @ 25°C, 150mA	59 (57–61)	lm
Forward Voltage (Vf) Typical	3.1	V
Test Current	150	mA
Maximum Current	160	mA
Lumens per Watt @ 150mA	127	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120	°
Package / Case	1113 (2835 Metric)	—
Size / Dimension	3.50 × 2.80	mm
Height – Seated (Max)	0.75	mm
Thermal Resistance	25	°C/W
Mounting Type	Surface Mount	—
RoHS Status	RoHS Compliant	—
MSL (Moisture Sensitivity Level)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict electrical and mechanical parameter matching across the following criteria:

Primary Substitution Parameters:

Color and CCT: White, Warm 2700K (exact match required)
Flux @ 25°C, 150mA: 59 lm (57–61 lm range)
Forward Voltage (Vf): 3.1V or 3.0V (within 0.1V tolerance)
Test Current: 150mA
Maximum Current: 160mA
CRI: 80
Viewing Angle: 120°
Package / Case: 1113 (2835 Metric)
Physical Dimensions: 3.50 × 2.80 mm
Height – Seated (Max): 0.75 mm
Thermal Resistance: 25°C/W
Mounting Type: Surface Mount
RoHS Compliance: Required
MSL: 2A (4 Weeks)

Substitute Categories:

Category A – Direct LM281B Series Equivalents (Same Series, Same Status) Parts SPMWH1228FD5WAWUS3 share identical electrical and mechanical specifications with SPMWH1228FD5WAWMS3. Both carry "Not For New Designs" status and operate at 3.1V forward voltage with 127 lm/W efficiency.

Category B – LM281B+ Series Upgrades (Enhanced Series, Active Status) Parts SPMWH1228FD5WAW0SC, SPMWH1228FD5WAWKSC, and SPMWH1228FD5WAWMSC are LM281B+ variants with identical electrical performance (3.1V, 150mA, 59 lm, 127 lm/W) but carry "Active" product status. These represent Samsung's current production line for this specification.

Category C – LM281BZ+ Series Variants (Enhanced Series, Lower Vf, Active Status) Parts SPMWH3228FD5WAW0SE, SPMWH3228FD5WAWKSE, and SPMWH3228FD5WAWMSE are LM281BZ+ variants with 3.0V forward voltage (0.1V lower than main part) and 131 lm/W efficiency (4 lm/W higher). These parts maintain identical flux output (59 lm), CRI (80), and mechanical specifications but offer improved power efficiency. All carry "Active" product status.

Parameter Comparison

Part Number	Series	Status	Vf (V)	Flux @ 25°C (lm)	lm/W	Inventory (Pcs)
SPMWH1228FD5WAWMS3	LM281B	Not For New Designs	3.1	59	127	7,277
SPMWH1228FD5WAWUS3	LM281B	Not For New Designs	3.1	59	127	19,696
SPMWH1228FD5WAW0SC	LM281B+	Active	3.1	59	127	884
SPMWH1228FD5WAWKSC	LM281B+	Active	3.1	59	59	833
SPMWH1228FD5WAWMSC	LM281B+	Active	3.1	59	127	703
SPMWH3228FD5WAW0SE	LM281BZ+	Active	3.0	59	131	913
SPMWH3228FD5WAWKSE	LM281BZ+	Active	3.0	59	131	946
SPMWH3228FD5WAWMSE	LM281BZ+	Active	3.0	59	131	832

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SPMWH1228FD5WAWUS3 provides direct substitution with identical LM281B series specifications, forward voltage, and efficiency. Both parts carry "Not For New Designs" status, indicating equivalent lifecycle positioning. Selection between SPMWH1228FD5WAWMS3 and SPMWH1228FD5WAWUS3 depends on inventory availability and supply chain logistics.

For Active Production Designs: LM281B+ variants (SPMWH1228FD5WAW0SC, SPMWH1228FD5WAWKSC, SPMWH1228FD5WAWMSC) are recommended for new designs requiring long-term supply assurance. These parts maintain identical electrical specifications (3.1V, 59 lm, 127 lm/W) while carrying "Active" product status, ensuring continued manufacturing support and availability.

For Power Efficiency Optimization: LM281BZ+ variants (SPMWH3228FD5WAW0SE, SPMWH3228FD5WAWKSE, SPMWH3228FD5WAWMSE) deliver 4 lm/W efficiency improvement (131 lm/W versus 127 lm/W) with 0.1V lower forward voltage (3.0V versus 3.1V). These parts maintain identical luminous flux (59 lm) and CRI (80), making them suitable for applications where reduced power consumption and heat generation are beneficial. All LM281BZ+ variants carry "Active" status.

Compliance Verification: All listed substitute parts maintain RoHS compliance and 2A MSL (4 Weeks) moisture sensitivity rating, matching the original part's environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAWUS3 be used as a direct replacement for SPMWH1228FD5WAWMS3?

A: Yes. Both parts are LM281B series with identical electrical specifications: 3.1V forward voltage, 59 lm flux at 25°C and 150mA, 127 lm/W efficiency, 80 CRI, and 120° viewing angle. Mechanical compatibility is confirmed: both use 1113 (2835 metric) package with 3.50 × 2.80 mm dimensions and 0.75 mm maximum seated height. The only difference is product status designation and inventory source.

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

A: LM281B+ represents Samsung's current active production line for this specification. Electrical performance is identical to LM281B: 3.1V forward voltage, 59 lm flux, 127 lm/W efficiency, and 80 CRI. The primary distinction is product lifecycle status: LM281B carries "Not For New Designs" designation, while LM281B+ is "Active" and recommended for ongoing production.

Q: Can LM281BZ+ parts substitute for LM281B in existing designs?

A: LM281BZ+ variants are electrically compatible with 0.1V lower forward voltage (3.0V versus 3.1V) and 4 lm/W higher efficiency (131 lm/W versus 127 lm/W). Luminous flux output remains identical at 59 lm. Designs operating at fixed current (150mA) will experience reduced power dissipation. Verify that circuit design accommodates the lower forward voltage before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain RoHS compliance status matching the original SPMWH1228FD5WAWMS3 specification.

Q: What is the moisture sensitivity level for these parts?

A: All parts carry MSL 2A (4 Weeks) rating. This indicates the parts must be stored in controlled humidity environments and used within 4 weeks of package opening under standard moisture conditions.

Q: Do the LM281BZ+ parts have different thermal characteristics?

A: Thermal resistance remains constant at 25°C/W across all variants. The LM281BZ+ lower forward voltage (3.0V versus 3.1V) results in reduced power dissipation at fixed current operation, which may improve thermal performance in practical applications despite identical thermal resistance specification.

Q: Which substitute part offers the best availability?

A: SPMWH1228FD5WAWUS3 (LM281B series) shows highest inventory at 19,696 pieces. Among active production parts, SPMWH3228FD5WAWKSE (LM281BZ+ series) shows 946 pieces in stock.

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