SPMWH1228FD5WAUMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAUMS2 is a Samsung Semiconductor LM281B warm white LED in 2835 metric package (1113 case) designed for surface mount applications. This component operates at 3500K color temperature with 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating it has been superseded in Samsung's product portfolio. Alternative equivalent parts are available to support ongoing production requirements and design flexibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	SPMWH1228FD5WAUMS2
Manufacturer	Samsung Semiconductor, Inc.
Series	LM281B
Color	White, Warm
CCT (K)	3500K
Flux @ 25°C, 150mA	57lm (55lm ~ 59lm)
Voltage - Forward (Vf) Typical	3.1V
Current - Test	150mA
Current - Max	160mA
Lumens/Watt @ 150mA	123 lm/W
CRI (Color Rendering Index)	80
Viewing Angle	120°
Package / Case	1113 (2835 Metric)
Size / Dimension	0.138" L x 0.110" W (3.50mm x 2.80mm)
Height - Seated (Max)	0.030" (0.75mm)
Thermal Resistance	25°C/W
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL (Moisture Sensitivity Level)	2A (4 Weeks)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WAUMS2 is determined by the following critical parameters:

Mechanical Compatibility:

Package / Case: 1113 (2835 Metric)
Size / Dimension: 0.138" L x 0.110" W (3.50mm x 2.80mm)
Height - Seated (Max): 0.030" (0.75mm)
Mounting Type: Surface Mount

Electrical Compatibility:

Voltage - Forward (Vf) Typical: 3.1V (or 3.0V for LM281BZ+ series)
Current - Test: 150mA
Current - Max: 160mA
Viewing Angle: 120°

Optical Compatibility:

Color: White, Warm
CRI (Color Rendering Index): 80
CCT (K): 3500K (primary) or 3000K (alternative)

Compliance & Environmental:

RoHS Status: RoHS Compliant
MSL: 2A (4 Weeks)
Thermal Resistance: 25°C/W

Substitute parts are grouped into two categories:

Category 1 - Direct Manufacturer Substitutes (LM281B+ Series): Parts with identical electrical specifications (3.1V Vf, 150mA test current) and 3500K color temperature. These represent active product alternatives with improved performance characteristics.

Category 2 - Parametric Equivalents (LM281B+ and LM281BZ+ Series): Parts with compatible electrical and mechanical specifications but variations in color temperature (3000K) or forward voltage (3.0V for LM281BZ+ series). These maintain functional equivalence within the specified parameter ranges.

Parameter Comparison

Part Number	Series	Product Status	CCT (K)	Vf (Typ)	Flux @ 25°C, 150mA	lm/W @ 150mA	Inventory (Pcs)
SPMWH1228FD5WAUMS2	LM281B	Not For New Designs	3500K	3.1V	57lm (55-59)	123	928
SPMWH1228FD5WAUMSA	LM281B+	Active	3500K	3.1V	58lm (56-60)	125	608
SPMWH1228FD5WAV0SA	LM281B+	Active	3000K	3.1V	57lm (55-59)	123	726
SPMWH1228FD5WAVKSA	LM281B+	Active	3000K	3.1V	57lm (55-59)	123	979
SPMWH1228FD5WAVMSA	LM281B+	Active	3000K	3.1V	57lm (55-59)	123	979
SPMWH3228FD5WAU0SC	LM281BZ+	Active	3500K	3.0V	57lm (55-59)	127	1050
SPMWH3228FD5WAUKSC	LM281BZ+	Active	3500K	3.0V	57lm (55-59)	127	965
SPMWH3228FD5WAUMSC	LM281BZ+	Active	3500K	3.0V	57lm (55-59)	127	1092

Engineering Selection Recommendations

For 3500K Warm White Applications with 3.1V Forward Voltage:

SPMWH1228FD5WAUMSA (LM281B+ series, Active status) is the primary direct substitute. This part maintains identical electrical specifications (3.1V Vf, 150mA test current, 120° viewing angle) and color temperature (3500K) while offering improved luminous flux (58lm vs. 57lm) and efficiency (125 lm/W vs. 123 lm/W). Active product status ensures long-term availability and supply chain stability.

For 3000K Warm White Applications with 3.1V Forward Voltage:

SPMWH1228FD5WAV0SA, SPMWH1228FD5WAVKSA, or SPMWH1228FD5WAVMSA (LM281B+ series, Active status) provide parametric equivalence with identical electrical characteristics but warmer color temperature (3000K). These parts are suitable when color temperature adjustment is acceptable within system design parameters.

For 3500K Applications with Lower Forward Voltage (3.0V):

SPMWH3228FD5WAU0SC, SPMWH3228FD5WAUKSC, or SPMWH3228FD5WAUMSC (LM281BZ+ series, Active status) offer improved efficiency (127 lm/W) and reduced forward voltage (3.0V). These parts are suitable for applications where lower operating voltage is beneficial. All substitute parts maintain identical package dimensions, thermal resistance, RoHS compliance, and MSL rating.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAUMSA directly replace SPMWH1228FD5WAUMS2 in existing designs?

A: Yes. SPMWH1228FD5WAUMSA maintains identical mechanical compatibility (1113/2835 package, 3.50mm x 2.80mm x 0.75mm), electrical specifications (3.1V Vf, 150mA test current, 160mA max), and optical characteristics (3500K, 120° viewing angle, CRI 80). Both parts are RoHS compliant with 2A MSL rating and 25°C/W thermal resistance.

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

A: The LM281B+ series represents an active product generation with improved luminous flux and efficiency specifications. SPMWH1228FD5WAUMSA (LM281B+) delivers 58lm at 125 lm/W compared to SPMWH1228FD5WAUMS2 (LM281B) at 57lm and 123 lm/W. All other parameters remain equivalent.

Q: Can I use SPMWH3228FD5WAU0SC (LM281BZ+, 3.0V) as a substitute for the original part?

A: SPMWH3228FD5WAU0SC is mechanically and optically compatible but operates at 3.0V forward voltage instead of 3.1V. This 0.1V reduction is within typical LED tolerance ranges and may be acceptable depending on circuit design. The part offers improved efficiency (127 lm/W) and maintains identical package dimensions and thermal characteristics.

Q: Are there color temperature alternatives available?

A: Yes. SPMWH1228FD5WAV0SA, SPMWH1228FD5WAVKSA, and SPMWH1228FD5WAVMSA provide 3000K color temperature (warmer) while maintaining identical electrical specifications (3.1V Vf, 150mA test current). These parts are suitable when color temperature adjustment is acceptable.

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

A: This designation indicates that SPMWH1228FD5WAUMS2 has been superseded in Samsung's product portfolio. All listed substitute parts carry "Active" status, ensuring continued manufacturing support, supply availability, and compliance with current industry standards.

Q: Do all substitute parts have the same package and thermal characteristics?

A: Yes. All substitute parts maintain identical package specifications (1113/2835 metric, 3.50mm x 2.80mm x 0.75mm maximum height), thermal resistance (25°C/W), mounting type (surface mount), RoHS compliance, and MSL rating (2A, 4 weeks).

Q: Which substitute offers the best efficiency?

A: SPMWH3228FD5WAU0SC, SPMWH3228FD5WAUKSC, and SPMWH3228FD5WAUMSC (LM281BZ+ series) deliver 127 lm/W efficiency compared to 123-125 lm/W for LM281B and LM281B+ series. This 2-4 lm/W improvement is achieved through the 3.0V forward voltage characteristic.

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