SPMWH1228FD5WAWMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAWMS4 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 63 lumens at 25°C with 135 lm/W efficiency and 80 CRI. The part carries "Not For New Designs" status, making substitute identification critical for ongoing production and design continuity. Alternative parts within the LM281B series and upgraded LM281B+ variants provide functional equivalence with improved availability and active product status.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Warm	—
CCT (Correlated Color Temperature)	2700K	K
Flux @ 25°C, 150mA	63	lm
Flux Range	61–65	lm
Forward Voltage (Vf) Typical	3.1	V
Test Current	150	mA
Maximum Current	160	mA
Lumens/Watt @ 150mA	135	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120	°
Package / Case	1113 (2835 Metric)	—
Size	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 parameter matching across electrical, optical, and mechanical dimensions:

Primary Substitution Criteria:

Color: White, Warm (2700K CCT)
Package: 1113 (2835 Metric)
Mounting: Surface Mount
Flux @ 25°C: 63 lm (61–65 lm range)
Test Current: 150 mA
Maximum Current: 160 mA
Viewing Angle: 120°
CRI: 80
Physical Dimensions: 3.50 × 2.80 mm, Height ≤ 0.75 mm
Thermal Resistance: 25°C/W
RoHS Compliance: Required
MSL: 2A (4 Weeks)

Series Variants:

LM281B series (original): SPMWH1228FD5WAWMS4, SPMWH1228FD5WAWUS4
LM281B+ series (enhanced): SPMWH1228FD5WAW0SE, SPMWH1228FD5WAWKSE, SPMWH1228FD5WAWMSE, SPMWH1228FD5WAWUSE
LM281BZ+ series (alternative): SPMWH3228FD5WAW0SG, SPMWH3228FD5WAWKSG, SPMWH3228FD5WAWMSG

All substitute parts maintain identical optical output (63 lm), thermal characteristics, and mechanical fit. Forward voltage variations (3.0V vs. 3.1V) and efficiency differences (135 vs. 140 lm/W) reflect series improvements without affecting circuit compatibility in constant-current driver applications.

Parameter Comparison

Part Number	Series	Status	Vf (V)	Flux @ 25°C (lm)	lm/W	Inventory (Pcs)
SPMWH1228FD5WAWMS4	LM281B	Not For New Designs	3.1	63	135	7,983
SPMWH1228FD5WAWUS4	LM281B	Not For New Designs	3.1	63	135	40,403
SPMWH1228FD5WAW0SE	LM281B+	Active	3.1	63	135	871
SPMWH1228FD5WAWKSE	LM281B+	Active	3.1	63	135	704
SPMWH1228FD5WAWMSE	LM281B+	Active	3.1	63	135	741
SPMWH1228FD5WAWUSE	LM281B+	Active	3.0	63	140	780
SPMWH3228FD5WAW0SG	LM281BZ+	Active	3.0	63	140	969
SPMWH3228FD5WAWKSG	LM281BZ+	Active	3.0	63	140	1,169
SPMWH3228FD5WAWMSG	LM281BZ+	Active	3.0	63	140	906

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair): SPMWH1228FD5WAWUS4 provides direct substitution with identical electrical and optical specifications (LM281B series, 3.1V, 135 lm/W). Higher inventory (40,403 pcs) ensures supply continuity. Both parts carry "Not For New Designs" status but remain functionally equivalent.

For Active Production & New Designs: LM281B+ series parts (SPMWH1228FD5WAW0SE, SPMWH1228FD5WAWKSE, SPMWH1228FD5WAWMSE) are recommended. All three maintain 3.1V forward voltage and 135 lm/W efficiency, ensuring drop-in compatibility with existing driver circuits. Active product status guarantees long-term availability and supply security.

For Optimized Efficiency Applications: SPMWH1228FD5WAWUSE, SPMWH3228FD5WAW0SG, SPMWH3228FD5WAWKSG, and SPMWH3228FD5WAWMSG deliver 140 lm/W efficiency with reduced forward voltage (3.0V). These LM281B+ and LM281BZ+ variants reduce power dissipation while maintaining identical 63 lm output and 2700K color temperature. Active status and RoHS compliance confirmed for all parts.

Compliance Verification: All substitute parts are RoHS Compliant with MSL 2A (4 Weeks) rating. ECCN classification (EAR99) and HTSUS code (8541.41.0000) remain consistent across all variants.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAWUS4 replace SPMWH1228FD5WAWMS4 without circuit modification? A: Yes. Both parts are LM281B series with identical 3.1V forward voltage, 150 mA test current, 63 lm output, and 120° viewing angle. Physical dimensions and thermal resistance are identical. No driver circuit changes are required.

Q: What is the difference between LM281B and LM281B+ series? A: LM281B+ represents an enhanced product line with active status. Electrical and optical parameters remain equivalent (3.1V, 63 lm, 135 lm/W for most variants). The primary advantage is active product status, ensuring continued manufacturing and supply availability.

Q: Why do some substitutes show 3.0V instead of 3.1V forward voltage? A: SPMWH1228FD5WAWUSE and LM281BZ+ variants (SPMWH3228 series) operate at 3.0V typical forward voltage with improved efficiency (140 lm/W vs. 135 lm/W). In constant-current driver circuits, this 0.1V reduction does not affect LED brightness or color output. Verify driver compliance with 3.0V operation before selection.

Q: Are all substitute parts available in Tape & Reel packaging? A: SPMWH1228 series parts (main part and LM281B/LM281B+ variants) are specified as Tape & Reel (TR). SPMWH3228 series (LM281BZ+) packaging is listed as unspecified in provided data. Confirm packaging with supplier before procurement.

Q: What is the inventory status for long-term supply? A: SPMWH1228FD5WAWUS4 has highest inventory (40,403 pcs). LM281B+ variants range from 704–871 pcs. LM281BZ+ variants range from 906–1,169 pcs. For critical applications, SPMWH1228FD5WAWUS4 or active LM281B+ series provide best supply security.

Q: Are all parts RoHS Compliant? A: Yes. All listed substitute parts carry RoHS Compliant status with MSL 2A (4 Weeks) moisture sensitivity rating. ECCN (EAR99) and HTSUS (8541.41.0000) classifications are consistent across all variants.

Q: Can LM281BZ+ parts (SPMWH3228 series) be used as direct substitutes? A: Yes, with driver verification. LM281BZ+ maintains identical 63 lm output, 2700K color temperature, 120° viewing angle, and 2835 package. Forward voltage is 3.0V (vs. 3.1V), and efficiency is 140 lm/W. Confirm driver compatibility with 3.0V operation before deployment.

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