SPMWH3228FD5WATMSE LED Equivalent & Substitute Parts

Part Overview

The SPMWH3228FD5WATMSE is a Samsung Semiconductor LED lighting component in the LM281BZ+ series, featuring neutral white 4000K color temperature in a 2835 metric package (1113 case). This surface mount LED operates at 3V forward voltage with 150mA test current and delivers 63 lumens at 25°C. The part is currently in Active product status with 808 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from equivalent alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Color	White, Neutral	—
CCT (Correlated Color Temperature)	4000K	K
Flux @ 25°C, 150mA	63 (61–65)	lm
Forward Voltage (Vf) Typical	3.0	V
Test Current	150	mA
Maximum Current	160	mA
Viewing Angle	120	°
CRI (Color Rendering Index)	80	—
Package / Case	1113 (2835 Metric)	—
Mounting Type	Surface Mount	—
Size	3.50 × 2.80	mm
Height (Seated Max)	0.75	mm
Thermal Resistance	25	°C/W
RoHS Status	RoHS Compliant	—
MSL (Moisture Sensitivity Level)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH3228FD5WATMSE is determined by strict equivalence across the following critical parameters:

Color & Chromaticity: White, Neutral 4000K color temperature must be maintained.

Luminous Flux: 63 lumens at 25°C and 150mA test current (tolerance range 61–65 lm) is the baseline specification.

Electrical Characteristics: Forward voltage, test current, and maximum current ratings must remain within specified tolerances to ensure circuit compatibility.

Optical Properties: Viewing angle of 120° and CRI of 80 define the optical performance envelope.

Mechanical Compatibility: Package type 1113 (2835 metric), surface mount configuration, and physical dimensions (3.50 × 2.80 × 0.75 mm) must be identical for PCB assembly compatibility.

Environmental & Compliance: RoHS compliance and MSL rating (2A, 4 Weeks) must be maintained.

The substitute parts SPMWH1228FD5WAT0S3 and SPMWH1228FD5WATMS3 meet these criteria with the following allowable variance: forward voltage increases from 3.0V to 3.1V, and lumens per watt decreases from 140 to 135 lm/W. All other parameters remain equivalent.

Parameter Comparison

Parameter	SPMWH3228FD5WATMSE (Main)	SPMWH1228FD5WAT0S3 (Substitute)	SPMWH1228FD5WATMS3 (Substitute)
Series	LM281BZ+	LM281B	LM281B
Color	White, Neutral	White, Neutral	White, Neutral
CCT	4000K	4000K	4000K
Flux @ 25°C, 150mA	63 lm (61–65)	63 lm (61–65)	63 lm (61–65)
Vf (Typical)	3.0V	3.1V	3.1V
Test Current	150mA	150mA	150mA
Maximum Current	160mA	160mA	160mA
Lumens/Watt @ 150mA	140 lm/W	135 lm/W	135 lm/W
CRI	80	80	80
Viewing Angle	120°	120°	120°
Package / Case	1113 (2835)	1113 (2835)	1113 (2835)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size (L × W)	3.50 × 2.80 mm	3.50 × 2.80 mm	3.50 × 2.80 mm
Height (Seated Max)	0.75 mm	0.75 mm	0.75 mm
Thermal Resistance	25°C/W	25°C/W	25°C/W
RoHS Status	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
MSL	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)
Product Status	Active	Not For New Designs	Not For New Designs
Packaging	—	Tape & Reel (TR)	Tape & Reel (TR)
Inventory	808 Pcs	18310 Pcs	37005 Pcs

Engineering Selection Recommendations

Primary Selection (SPMWH3228FD5WATMSE): The main part is designated Active product status, indicating ongoing manufacturer support and recommended for new designs. This part should be the first choice for new applications requiring neutral white 4000K LED lighting in the 2835 package format.

Secondary Selection (SPMWH1228FD5WATMS3): This substitute carries ROHS3 compliance certification, which exceeds the RoHS Compliant status of the main part. It is suitable for applications where enhanced environmental compliance documentation is required. However, this part is marked Not For New Designs, indicating it is in legacy or end-of-life status. Use only when primary part availability is constrained.

Tertiary Selection (SPMWH1228FD5WAT0S3): This substitute maintains RoHS Compliant status matching the main part. It is also marked Not For New Designs. Inventory availability is substantial (18310 units), making it viable for high-volume production when primary part allocation is limited. Forward voltage tolerance (3.1V vs. 3.0V) must be evaluated against circuit design margins.

Voltage Consideration: Both substitutes operate at 3.1V typical forward voltage compared to 3.0V for the main part. This 0.1V increase represents a 3.3% rise and must be verified against power supply design and thermal management calculations, particularly in series-connected LED strings.

Efficiency Trade-off: Lumens per watt decreases from 140 to 135 lm/W with substitutes. For applications where power efficiency is critical, this 3.6% reduction in luminous efficacy should be factored into thermal and power budget analysis.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATMS3 be used as a direct replacement for SPMWH3228FD5WATMSE?

A: Yes, within the specified electrical and mechanical tolerances. Both parts deliver 63 lumens at 4000K color temperature in identical 2835 packages. The forward voltage difference (3.1V vs. 3.0V) is within typical LED tolerance ranges but must be verified in your specific circuit design, particularly if the LED is part of a series string or current-limited supply.

Q: What is the difference between the two substitute parts?

A: SPMWH1228FD5WATMS3 carries ROHS3 certification, while SPMWH1228FD5WAT0S3 carries standard RoHS Compliant status. Electrically and optically, both parts are identical. Selection depends on compliance documentation requirements for your end application.

Q: Why are the substitute parts marked "Not For New Designs"?

A: This designation indicates the parts are in legacy status. Samsung Semiconductor recommends using the Active-status SPMWH3228FD5WATMSE for new product development. Substitute parts should be used only when primary part availability is insufficient or when existing designs require continuation of legacy components.

Q: Are the 2835 package dimensions identical across all three parts?

A: Yes. All three parts use the 1113 (2835 metric) package with dimensions of 3.50 × 2.80 × 0.75 mm. They are mechanically interchangeable on standard PCB layouts designed for 2835 LEDs.

Q: What is the impact of the 0.1V forward voltage increase?

A: In a single LED circuit with current limiting, the voltage increase has minimal impact. In series-connected strings, the cumulative voltage rise (0.1V per LED) must be accommodated by the power supply. For example, a 10-LED string would require an additional 1.0V headroom. Verify your circuit design can tolerate this variance.

Q: Can I mix SPMWH3228FD5WATMSE and substitute parts in the same production batch?

A: Mixing is not recommended for applications requiring consistent color rendering or brightness. Although all parts meet the same 63 lm specification at 25°C, the lumens per watt difference (140 vs. 135 lm/W) may result in perceptible brightness variation under identical operating conditions, particularly in high-brightness applications or color-critical lighting systems.

Q: What is MSL 2A (4 Weeks) and why does it matter?

A: MSL (Moisture Sensitivity Level) 2A indicates the component can be stored in dry conditions for up to 4 weeks before soldering. All three parts share this rating. Ensure proper moisture control during storage and follow standard PCB assembly protocols for moisture-sensitive devices.

Q: Is there a thermal performance difference between the main part and substitutes?

A: No. All three parts specify identical thermal resistance of 25°C/W. Thermal management design can proceed identically regardless of which part is selected.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message