SPMWH1228FD5WAVMS4 Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAVMS4 is a Samsung Semiconductor LM281B series warm white LED in 2835 metric package (1113 case). This surface mount LED operates at 3000K color temperature with 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing alternatives for ongoing production or maintenance applications.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Warm	—
CCT (Correlated Color Temperature)	3000K	K
Flux @ 25°C, 150mA	64lm (62–66lm range)	lm
Current - Test	150mA	mA
Voltage - Forward (Typ)	3.1V	V
Lumens/Watt @ 150mA	138 lm/W	lm/W
CRI (Color Rendering Index)	80	—
Current - Max	160mA	mA
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	—
MSL (Moisture Sensitivity Level)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WAVMS4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Color: White, Warm (3000K)
Package / Case: 1113 (2835 Metric)
Mounting Type: Surface Mount
Viewing Angle: 120°
CRI: 80
Current - Test: 150mA
Voltage - Forward (Typ): 3.1V or 3.0V (within acceptable tolerance)
Flux @ 25°C, 150mA: 64lm nominal (62–66lm range acceptable)
Lumens/Watt: 138–142 lm/W range
Current - Max: 160mA
Thermal Resistance: 25°C/W
RoHS Compliance: Required
MSL: 2A (4 Weeks)

Substitution Categories:

Category 1: Direct Manufacturer Equivalents (Same Series) Parts with identical electrical and mechanical specifications within the LM281B series, differing only in packaging designation or supplier location code.

Category 2: Parametric Equivalents (Same Series) Parts with identical electrical performance and package dimensions, functionally interchangeable in circuit design.

Category 3: Series Upgrade Equivalents (LM281B+ / LM281BZ+) Parts from enhanced series with improved efficiency (140–142 lm/W) and active product status, maintaining all mechanical and thermal compatibility while offering superior performance characteristics.

Parameter Comparison

Part Number	Series	Product Status	Flux @ 25°C (lm)	Vf (Typ) (V)	Lumens/Watt (lm/W)	Package	Inventory (Pcs)
SPMWH1228FD5WAVMS4	LM281B	Not For New Designs	64 (62–66)	3.1	138	1113 (2835)	40,665
SPMWH1228FD5WAVMSE	LM281B+	Active	65 (63–67)	3.1	140	1113 (2835)	855
SPMWH1228FD5WAV0S4	LM281B	Not For New Designs	64 (62–66)	3.1	138	1113 (2835)	12,676
SPMWH1228FD5WAVUS4	LM281B	Not For New Designs	64 (62–66)	3.1	138	1113 (2835)	41,107
SPMWH3228FD5WAV0SG	LM281BZ+	Active	64 (62–66)	3.0	142	1113 (2835)	1,144
SPMWH3228FD5WAVKSG	LM281BZ+	Active	64 (62–66)	3.0	142	1113 (2835)	769
SPMWH3228FD5WAVMSG	LM281BZ+	Active	64 (62–66)	3.0	142	1113 (2835)	855

Engineering Selection Recommendations

For Existing Designs (Maintenance / Repair): SPMWH1228FD5WAVUS4 and SPMWH1228FD5WAV0S4 are parametric equivalents with identical electrical specifications (3.1V, 138 lm/W, 64lm @ 150mA). Both maintain "Not For New Designs" status consistent with the original part. SPMWH1228FD5WAVUS4 offers the highest inventory availability (41,107 pcs), ensuring supply continuity for ongoing production support.

For New Designs or Design Refresh: SPMWH1228FD5WAVMSE (LM281B+ series, Active status) provides a direct upgrade path with improved efficiency (140 lm/W vs. 138 lm/W) while maintaining identical forward voltage (3.1V) and flux output (65lm nominal). This part is actively manufactured and supported by Samsung Semiconductor.

For Maximum Efficiency and Long-Term Support: SPMWH3228FD5WAV0SG, SPMWH3228FD5WAVKSG, or SPMWH3228FD5WAVMSG (LM281BZ+ series, Active status) deliver superior efficiency (142 lm/W) with slightly reduced forward voltage (3.0V vs. 3.1V). All three variants are actively produced and recommended for new designs requiring extended product lifecycle support. The 0.1V voltage reduction is within standard LED circuit design tolerance and may improve overall system efficiency.

Compliance Verification: All substitute parts maintain RoHS compliance and MSL 2A (4 Weeks) rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q1: Can SPMWH1228FD5WAVUS4 be used as a direct replacement for SPMWH1228FD5WAVMS4?

A: Yes. Both parts are LM281B series with identical electrical specifications: 3.1V forward voltage, 64lm flux @ 25°C/150mA, 138 lm/W efficiency, 120° viewing angle, and 1113 (2835) package. The difference is packaging designation (US vs. MS location code). Mechanical and thermal properties are identical.

Q2: What is the difference between LM281B and LM281B+ series?

A: LM281B+ is an enhanced version with improved luminous efficiency (140 lm/W vs. 138 lm/W) and slightly higher flux output (65lm vs. 64lm nominal). Forward voltage remains 3.1V. LM281B+ is actively manufactured; LM281B is not recommended for new designs.

Q3: Can LM281BZ+ parts (SPMWH3228 base number) substitute for LM281B parts (SPMWH1228 base number)?

A: Yes, with circuit design consideration. LM281BZ+ operates at 3.0V forward voltage versus 3.1V for LM281B. Both deliver 64lm flux @ 150mA and 120° viewing angle in identical 2835 package. The 0.1V reduction improves efficiency (142 lm/W vs. 138 lm/W) and is compatible with standard LED driver circuits. LM281BZ+ is actively supported.

Q4: Why do some substitute parts show "Not For New Designs" status?

A: Parts marked "Not For New Designs" have reached end-of-life status and are maintained for existing design support only. For new product development, select parts with "Active" status: SPMWH1228FD5WAVMSE (LM281B+) or SPMWH3228 variants (LM281BZ+).

Q5: Are all substitute parts available in Tape & Reel (TR) packaging?

A: SPMWH1228FD5WAVMS4, SPMWH1228FD5WAV0S4, SPMWH1228FD5WAVUS4, and SPMWH1228FD5WAVMSE are specified as Tape & Reel (TR). SPMWH3228 variants (LM281BZ+ series) do not specify packaging designation in the provided data. Confirm packaging with supplier before procurement.

Q6: What is the thermal resistance impact when substituting between series?

A: All substitute parts maintain 25°C/W thermal resistance. Thermal performance is equivalent across all listed alternatives.

Q7: Are there any forward voltage considerations for circuit design?

A: Yes. LM281B and LM281B+ operate at 3.1V; LM281BZ+ operates at 3.0V. For constant-current LED drivers, this difference is transparent. For voltage-regulated circuits, verify driver compliance with the 3.0V–3.1V range. The 0.1V difference is within standard LED circuit tolerance.

Q8: Which substitute part offers the best long-term availability?

A: SPMWH1228FD5WAVMSE (LM281B+, Active status) and SPMWH3228 variants (LM281BZ+, Active status) are actively manufactured by Samsung Semiconductor and recommended for designs requiring extended product lifecycle support.

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