SPMWH1228FD5WARUS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WARUS3 is a Samsung Semiconductor LM281B Cool White 5000K surface mount LED in 2835 metric package format. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. The part delivers 65 lumens at 25°C under 150mA test current with a forward voltage of 3.1V and 120° viewing angle. Due to its discontinued design status, equivalent substitute parts from Samsung's active product lines are available to maintain design continuity and ensure long-term supply chain reliability.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Cool	—
CCT (Correlated Color Temperature)	5000K	K
Flux @ 25°C, 150mA Test Current	65 lm (63–67 lm range)	lm
Forward Voltage (Vf) Typical	3.1V	V
Test Current	150mA	mA
Maximum Current	160mA	mA
Lumens per Watt @ 150mA	140 lm/W	lm/W
Color Rendering Index (CRI)	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	—
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitute parts for SPMWH1228FD5WARUS3 are classified into two functional groups based on electrical and mechanical compatibility:

Group 1: LM281B Series (Direct Equivalents) Parts SPMWH1228FD5WAR0S3, SPMWH1228FD5WARMS3, and SPMWH1228FD5WARMSC maintain identical electrical specifications: 5000K CCT, 65 lm flux at 25°C/150mA, 3.1V forward voltage, 140 lm/W efficiency, 80 CRI, and 120° viewing angle. All use the same 2835 metric package with 0.75mm maximum seated height. These parts differ only in packaging designation codes and product lifecycle status. SPMWH1228FD5WAR0S3 and SPMWH1228FD5WARMSC are available with higher inventory levels (1732 and 1039 units respectively).

Group 2: LM281B+ Series (Enhanced Variants) Parts SPMWH1228FD5WAR0SC and SPMWH1228FD5WARKSC represent the LM281B+ product line, which maintains all electrical parameters identical to Group 1 but carries "Active" product status. These parts are recommended for new designs requiring long-term supply assurance.

Group 3: LM281BZ+ Series (Alternative Voltage) Parts SPMWH3228FD5WAR0SE, SPMWH3228FD5WARKSE, and SPMWH3228FD5WARMSE use the LM281BZ+ series with reduced forward voltage of 3.0V (versus 3.1V in main part). Luminous efficiency increases to 144 lm/W. All other parameters remain constant: 5000K CCT, 65 lm flux, 150mA test current, 80 CRI, 120° viewing angle, and 2835 package format. These parts are suitable for applications where lower forward voltage reduces power dissipation.

Substitution Criteria:

Color temperature: 5000K (all substitutes)
Flux output: 65 lm at 25°C/150mA (all substitutes)
Package format: 2835 metric (all substitutes)
Viewing angle: 120° (all substitutes)
CRI: 80 (all substitutes)
Mounting: Surface Mount (all substitutes)
RoHS compliance: All substitutes RoHS compliant

Parameter Comparison

Part Number	Series	Vf (Typ) [V]	Flux @ 25°C [lm]	lm/W @ 150mA	Product Status	Inventory [Pcs]	RoHS Status
SPMWH1228FD5WARUS3	LM281B	3.1	65	140	Not For New Designs	673	RoHS Compliant
SPMWH1228FD5WAR0S3	LM281B	3.1	65	140	Not For New Designs	1732	ROHS3 Compliant
SPMWH1228FD5WARMS3	LM281B	3.1	65	140	Not For New Designs	1063	RoHS Compliant
SPMWH1228FD5WARMSC	LM281B+	3.1	65	140	Active	1039	RoHS Compliant
SPMWH1228FD5WAR0SC	LM281B+	3.1	65	140	Active	984	RoHS Compliant
SPMWH1228FD5WARKSC	LM281B+	3.1	65	140	Active	701	RoHS Compliant
SPMWH3228FD5WAR0SE	LM281BZ+	3.0	65	144	Active	924	RoHS Compliant
SPMWH3228FD5WARKSE	LM281BZ+	3.0	65	144	Active	1100	RoHS Compliant
SPMWH3228FD5WARMSE	LM281BZ+	3.0	65	144	Active	941	RoHS Compliant

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair): SPMWH1228FD5WAR0S3 and SPMWH1228FD5WARMS3 provide direct electrical and mechanical equivalence to the original SPMWH1228FD5WARUS3. Both maintain 3.1V forward voltage and 140 lm/W efficiency. SPMWH1228FD5WAR0S3 offers the highest inventory availability (1732 units) and ROHS3 compliance certification.

For New Design Implementation: SPMWH1228FD5WARMSC and SPMWH1228FD5WAR0SC (LM281B+ series) are classified as "Active" products and are suitable for new designs requiring extended product lifecycle support. These parts maintain identical electrical performance (3.1V, 140 lm/W) while ensuring long-term supply chain continuity.

For Power-Optimized Applications: SPMWH3228FD5WARKSE and SPMWH3228FD5WARMSE (LM281BZ+ series) reduce forward voltage to 3.0V while maintaining 65 lm flux output, resulting in improved luminous efficiency of 144 lm/W. These parts are suitable for battery-powered or low-voltage applications where reduced power dissipation is beneficial. All LM281BZ+ variants carry "Active" product status.

Compliance Considerations: All substitute parts are RoHS compliant with MSL 2A (4 Weeks) moisture sensitivity rating. SPMWH1228FD5WAR0S3 carries ROHS3 certification, providing enhanced compliance documentation for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAR0S3 replace SPMWH1228FD5WARUS3 in existing assemblies? A: Yes. Both parts are electrically and mechanically identical: 3.1V forward voltage, 65 lm flux at 25°C/150mA, 140 lm/W efficiency, 120° viewing angle, and 2835 metric package. The parts differ only in packaging designation codes and inventory source.

Q: What is the difference between LM281B and LM281B+ series? A: Electrical specifications are identical (3.1V, 65 lm, 140 lm/W, 80 CRI). The primary difference is product lifecycle status: LM281B is "Not For New Designs," while LM281B+ is "Active" and recommended for new product development requiring long-term supply assurance.

Q: Should I use LM281BZ+ parts instead of LM281B+? A: LM281BZ+ parts (3.0V forward voltage, 144 lm/W) are suitable when reduced power dissipation is required. Both series maintain identical 65 lm flux output and 5000K color temperature. Selection depends on circuit design requirements and thermal management considerations.

Q: Are all substitute parts compatible with the same PCB footprint? A: Yes. All substitute parts use the 2835 metric package (1113 case code) with identical dimensions: 3.50mm × 2.80mm length/width and 0.75mm maximum seated height. PCB footprints are interchangeable.

Q: What is the significance of ROHS3 compliance on SPMWH1228FD5WAR0S3? A: ROHS3 certification indicates compliance with the latest RoHS Directive requirements. This designation provides enhanced regulatory documentation for applications subject to strict environmental compliance standards.

Q: Can I mix different substitute part numbers in the same production batch? A: All substitute parts maintain identical electrical and mechanical specifications within their respective series (LM281B, LM281B+, LM281BZ+). Mixing is permissible from an engineering standpoint, though inventory management and traceability practices should be considered.

Q: What inventory levels should I consider for supply chain planning? A: SPMWH1228FD5WAR0S3 offers the highest availability (1732 units). For LM281B+ series, SPMWH1228FD5WARMSC provides 1039 units. For LM281BZ+ series, SPMWH3228FD5WARKSE offers 1100 units. Inventory levels should be verified with current supplier data for production planning.

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