SPMWH1228FD7WAVMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAVMS3 is a Samsung Semiconductor LM281B warm white LED in 2835 metric package (1113 case) designed for surface mount applications. This component operates at 3000K color temperature with 150mA test current and delivers 55 lumens at 25°C. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Alternative equivalent and substitute parts are available to support ongoing production requirements and design transitions.

Key Parameters

Parameter	Value	Specification Range
Series	LM281B	LM281B / LM281B+ / LM281BZ+
Color	White, Warm	Warm White
CCT (K)	3000K	2700K – 3000K
Flux @ 25°C, 150mA	55 lm (53–57 lm)	53–57 lm
Forward Voltage (Vf)	3.1V	3.0V – 3.1V
Current – Test	150 mA	150 mA
Current – Max	160 mA	160 mA
Viewing Angle	120°	120°
Package / Case	1113 (2835 Metric)	1113 (2835 Metric)
Mounting Type	Surface Mount	Surface Mount
Size / Dimension	0.138" L × 0.110" W (3.50mm × 2.80mm)	0.138" L × 0.110" W (3.50mm × 2.80mm)
Height – Seated (Max)	0.030" (0.75mm)	0.030" (0.75mm)
RoHS Status	RoHS Compliant	RoHS Compliant
MSL Rating	2A (4 Weeks)	2A (4 Weeks)

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAVMS3 is determined by the following critical parameters:

Primary Substitution Criteria:

Package / Case: 1113 (2835 Metric)
Mounting Type: Surface Mount
Color: White, Warm
Viewing Angle: 120°
Current – Test: 150 mA
Current – Max: 160 mA
Size / Dimension: 0.138" L × 0.110" W (3.50mm × 2.80mm)
Height – Seated (Max): 0.030" (0.75mm)

Secondary Compatibility Parameters:

Forward Voltage (Vf): 3.0V – 3.1V (allows 3.0V and 3.1V variants)
CCT (K): 2700K – 3000K (warm white range)
Flux @ 25°C: 53–57 lm range acceptable
Lumens/Watt: 116–122 lm/W range acceptable

Substitutes are grouped into two categories:

Category 1: Direct Series Equivalents (LM281B / LM281B+) Parts maintaining identical or compatible electrical and thermal characteristics within the LM281B family. These include SPMWH1228FD7WAVMSC, SPMWH1228FD7WAV0S3, and SPMWH1228FD5WAW0SA, SPMWH1228FD5WAWKSA, SPMWH1228FD5WAWMSA.

Category 2: Enhanced Series Equivalents (LM281BZ+) Parts from the LM281BZ+ series with improved thermal performance (25°C/W vs. 17°C/W) and higher luminous efficacy (122 lm/W). These include SPMWH3228FD5WAW0SC, SPMWH3228FD5WAWKSC, and SPMWH3228FD5WAWMSC. Forward voltage is 3.0V (0.1V lower than main part).

Parameter Comparison

Part Number	Series	CCT (K)	Flux @ 25°C (lm)	Vf (V)	lm/W	CRI	Thermal Resistance (°C/W)	Product Status	Inventory (Pcs)
SPMWH1228FD7WAVMS3	LM281B	3000	55	3.1	118	90	17	Not For New Designs	1295
SPMWH1228FD7WAVMSC	LM281B+	3000	54	3.1	116	90	25	Active	1080
SPMWH1228FD7WAV0S3	LM281B	3000	55	3.1	118	90	17	Not For New Designs	54987
SPMWH1228FD5WAW0SA	LM281B+	2700	55	3.1	118	80	25	Active	985
SPMWH1228FD5WAWKSA	LM281B+	2700	55	3.1	118	80	25	Active	1053
SPMWH1228FD5WAWMSA	LM281B+	2700	55	3.1	118	80	25	Active	774
SPMWH3228FD5WAW0SC	LM281BZ+	2700	55	3.0	122	80	25	Active	770
SPMWH3228FD5WAWKSC	LM281BZ+	2700	55	3.0	122	80	25	Active	866
SPMWH3228FD5WAWMSC	LM281BZ+	2700	55	3.0	122	80	25	Active	732

Engineering Selection Recommendations

For Direct Replacement (Same CCT 3000K):

SPMWH1228FD7WAVMSC (LM281B+, Active status) is the primary direct substitute. It maintains 3000K color temperature, identical 120° viewing angle, and compatible electrical parameters (3.1V, 150mA). The increased thermal resistance (25°C/W vs. 17°C/W) requires thermal design verification in applications with constrained heat dissipation. CRI remains at 90, preserving color rendering quality.

SPMWH1228FD7WAV0S3 (LM281B, Not For New Designs) provides identical electrical and thermal characteristics but shares the same end-of-life status as the main part. This option is suitable only for sustaining production of existing designs.

For Warm White Transition (2700K CCT):

SPMWH1228FD5WAW0SA, SPMWH1228FD5WAWKSA, and SPMWH1228FD5WAWMSA (all LM281B+, Active status) offer 2700K color temperature with identical luminous output (55 lm) and efficiency (118 lm/W). CRI decreases to 80. These parts are suitable for applications where warmer color temperature is acceptable and active product support is required.

For Enhanced Thermal Performance (LM281BZ+ Series):

SPMWH3228FD5WAW0SC, SPMWH3228FD5WAWKSC, and SPMWH3228FD5WAWMSC (all LM281BZ+, Active status) provide superior luminous efficacy (122 lm/W) and improved thermal management (25°C/W). Forward voltage is 3.0V (0.1V lower). These parts are suitable for high-density LED arrays or applications requiring enhanced thermal performance. CRI is 80 with 2700K color temperature.

Compliance and Certification:

All substitute parts maintain RoHS compliance and 2A MSL rating (4 weeks). ECCN and HTSUS classifications are identical across all variants.

Frequently Asked Questions (FAQ)

Q1: Can SPMWH1228FD7WAVMSC directly replace SPMWH1228FD7WAVMS3 in existing designs?

A: Yes, SPMWH1228FD7WAVMSC is a direct substitute. Both maintain 3000K color temperature, 120° viewing angle, 3.1V forward voltage, and 150mA test current. The thermal resistance difference (25°C/W vs. 17°C/W) must be evaluated in thermal-constrained applications. SPMWH1228FD7WAVMSC has Active product status, supporting long-term availability.

Q2: What is the difference between LM281B, LM281B+, and LM281BZ+ series?

A: LM281B is the legacy series (Not For New Designs). LM281B+ is the active successor with identical electrical performance but higher thermal resistance. LM281BZ+ offers enhanced luminous efficacy (122 lm/W vs. 118 lm/W) and lower forward voltage (3.0V vs. 3.1V). All three series share identical package dimensions and mounting characteristics.

Q3: Are 2700K variants (SPMWH1228FD5WAW0SA, SPMWH1228FD5WAWKSA, SPMWH1228FD5WAWMSA) compatible with 3000K designs?

A: These parts are electrically and mechanically compatible but differ in color temperature and CRI. 2700K variants produce warmer light (lower CCT) with CRI of 80 versus 90 for 3000K parts. Substitution requires design review to confirm color temperature and color rendering requirements are met.

Q4: What is the significance of the thermal resistance difference between LM281B (17°C/W) and LM281B+ (25°C/W)?

A: Higher thermal resistance indicates reduced heat dissipation efficiency. In applications with limited thermal management, the 8°C/W difference may result in higher junction temperatures at identical drive currents. Thermal design analysis is required for high-power or high-density applications.

Q5: Can LM281BZ+ parts (3.0V forward voltage) replace LM281B parts (3.1V forward voltage)?

A: Yes, mechanically and electrically. The 0.1V difference is within typical LED forward voltage tolerance. However, circuit design must accommodate the lower voltage. LM281BZ+ parts offer improved efficiency (122 lm/W) and are recommended for new designs requiring enhanced thermal performance.

Q6: What does "Not For New Designs" status mean?

A: This designation indicates the part has reached end-of-life and Samsung Semiconductor does not recommend its use in new product designs. Existing inventory may be available for sustaining production of legacy products. Active-status alternatives should be selected for new designs.

Q7: Are all substitute parts available in Tape & Reel (TR) packaging?

A: SPMWH1228 series parts are available in Tape & Reel packaging. SPMWH3228 series (LM281BZ+) packaging information is not specified in the provided data. Confirm packaging availability with supplier before design implementation.

Q8: Do all parts meet RoHS compliance?

A: Yes, all listed parts are RoHS Compliant with identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications. MSL rating is 2A (4 weeks) across all variants.

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