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SPMWH3228FD5WAWKS3 LED Equivalent & Substitute Parts
Part Overview
The SPMWH3228FD5WAWKS3 is a Samsung Semiconductor warm white LED (LM281BZ series) in 2835 metric package format. This surface mount LED operates at 2700K 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 The part is classified as "Not For New Designs," indicating it has been superseded in Samsung's product portfolio. Identification of equivalent substitute parts is necessary for design continuity, inventory management, and long-term supply chain planning.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | SPMWH3228FD5WAWKS3 | — |
| Manufacturer | Samsung Semiconductor, Inc. | — |
| Series | LM281BZ | — |
| Color | White, Warm | — |
| CCT (Correlated Color Temperature) | 2700K | K |
| Flux @ 25°C, 150mA | 59 | lm |
| Flux Range | 57–61 | lm |
| Current - Test | 150 | mA |
| Current - Maximum | 160 | mA |
| Voltage - Forward (Typ) | 3.1 | V |
| Lumens/Watt @ 150mA | 127 | lm/W |
| CRI (Color Rendering Index) | 80 | — |
| Viewing Angle | 120 | ° |
| Mounting Type | Surface Mount | — |
| Package / Case | 1113 (2835 Metric) | — |
| Size / Dimension | 3.50 × 2.80 | mm |
| Height - Seated (Max) | 0.75 | mm |
| Thermal Resistance | 25 | °C/W |
| RoHS Status | RoHS Compliant | — |
| Moisture Sensitivity Level (MSL) | 2A (4 Weeks) | — |
| Product Status | Not For New Designs | — |
Substitute Part Grouping Explanation
Substitution eligibility for the SPMWH3228FD5WAWKS3 is determined by the following critical parameters:
Primary Substitution Criteria:
- Color: White, Warm (2700K CCT)
- Package / Case: 1113 (2835 Metric)
- Mounting Type: Surface Mount
- Flux @ 25°C, 150mA: 59 lm (57–61 lm range)
- Current - Test: 150 mA
- Voltage - Forward (Typ): 3.1 V or 3.0 V
- CRI: 80
- Viewing Angle: 120°
- Thermal Resistance: 25°C/W
- RoHS Compliance: Yes
- MSL: 2A (4 Weeks)
Substitution Groups:
Group 1: LM281B+ Series (Active Status) Parts SPMWH1228FD5WAWKSC, SPMWH1228FD5WAW0SC, and SPMWH1228FD5WAWMSC are LM281B+ series LEDs with identical electrical and mechanical specifications to the main part. These parts are classified as "Active" in Samsung's product portfolio, making them suitable for new designs and long-term availability.
Group 2: LM281B Series (Not For New Designs) Parts SPMWH1228FD5WAWMS3 and SPMWH1228FD5WAWUS3 are LM281B series LEDs with identical electrical and mechanical specifications. These parts share the same "Not For New Designs" status as the main part.
Group 3: LM281BZ+ Series (Active Status, Modified Voltage) Parts SPMWH3228FD5WAW0SE, SPMWH3228FD5WAWKSE, and SPMWH3228FD5WAWMSE are LM281BZ+ series LEDs with forward voltage of 3.0 V (versus 3.1 V for the main part) and lumens/watt efficiency of 131 lm/W (versus 127 lm/W). These parts are "Active" status. The 0.1 V voltage difference and improved efficiency represent a design evolution within the same product family.
All substitute parts maintain identical package dimensions, thermal characteristics, and compliance certifications.
Parameter Comparison
| Parameter | SPMWH3228FD5WAWKS3 (Main) | SPMWH1228FD5WAWKSC | SPMWH1228FD5WAW0SC | SPMWH1228FD5WAWMS3 | SPMWH1228FD5WAWMSC | SPMWH1228FD5WAWUS3 | SPMWH3228FD5WAW0SE | SPMWH3228FD5WAWKSE | SPMWH3228FD5WAWMSE |
|---|---|---|---|---|---|---|---|---|---|
| Series | LM281BZ | LM281B+ | LM281B+ | LM281B | LM281B+ | LM281B | LM281BZ+ | LM281BZ+ | LM281BZ+ |
| Color | White, Warm | White, Warm | White, Warm | White, Warm | White, Warm | White, Warm | White, Warm | White, Warm | White, Warm |
| CCT (K) | 2700 | 2700 | 2700 | 2700 | 2700 | 2700 | 2700 | 2700 | 2700 |
| Flux @ 25°C (lm) | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 59 |
| Flux Range (lm) | 57–61 | 57–61 | 57–61 | 57–61 | 57–61 | 57–61 | 57–61 | 57–61 | 57–61 |
| Current - Test (mA) | 150 | 150 | 150 | 150 | 150 | 150 | 150 | 150 | 150 |
| Current - Max (mA) | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 |
| Voltage - Forward (V) | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.0 | 3.0 | 3.0 |
| Lumens/Watt @ 150mA | 127 | 127 | 127 | 127 | 127 | 127 | 131 | 131 | 131 |
| CRI | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| Viewing Angle (°) | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 |
| Package / Case | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) | 1113 (2835) |
| Size (mm) | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 | 3.50 × 2.80 |
| Height - Seated Max (mm) | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
| Thermal Resistance (°C/W) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
| MSL | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) | 2A (4 Weeks) |
| Product Status | Not For New Designs | Active | Active | Not For New Designs | Active | Not For New Designs | Active | Active | Active |
Engineering Selection Recommendations
For Existing Designs (Maintenance & Repair): The SPMWH1228FD5WAWMS3 and SPMWH1228FD5WAWUS3 (LM281B series) provide direct electrical and mechanical equivalence to the main part SPMWH3228FD5WAWKS3. Both maintain identical forward voltage (3.1 V), luminous flux (59 lm), and efficiency (127 lm/W). These parts are suitable for replacement in existing production runs where design continuity is required.
For New Designs: The SPMWH1228FD5WAWKSC, SPMWH1228FD5WAW0SC, and SPMWH1228FD5WAWMSC (LM281B+ series) are classified as "Active" and are recommended for new designs. These parts provide identical performance specifications while ensuring long-term supply availability and Samsung's continued product support.
For Enhanced Efficiency Applications: The SPMWH3228FD5WAW0SE, SPMWH3228FD5WAWKSE, and SPMWH3228FD5WAWMSE (LM281BZ+ series) offer improved luminous efficiency (131 lm/W versus 127 lm/W) with a reduced forward voltage of 3.0 V. These parts are "Active" status and suitable for new designs where power efficiency optimization is a design objective. The 0.1 V voltage reduction results in lower power dissipation per unit.
All substitute parts maintain RoHS compliance and identical moisture sensitivity levels, ensuring compatibility with standard PCB assembly and storage protocols.
Frequently Asked Questions (FAQ)
Q: Can SPMWH1228FD5WAWKSC replace SPMWH3228FD5WAWKS3 in existing designs?
A: Yes. The SPMWH1228FD5WAWKSC is electrically and mechanically equivalent. Both parts operate at 3.1 V forward voltage, 150 mA test current, 59 lm luminous flux, and 127 lm/W efficiency. Package dimensions, thermal characteristics, and compliance certifications are identical. The primary difference is product status: SPMWH1228FD5WAWKSC is "Active," while SPMWH3228FD5WAWKS3 is "Not For New Designs."
Q: What is the difference between LM281B, LM281B+, and LM281BZ+ series?
A: All three series share identical electrical performance at the specified test conditions (150 mA, 59 lm, 2700K, CRI 80). The LM281B+ and LM281BZ+ series represent product line evolution with "Active" status, ensuring continued availability. The LM281BZ+ series additionally offers improved efficiency (131 lm/W) with reduced forward voltage (3.0 V) compared to LM281B and LM281B+ (127 lm/W at 3.1 V).
Q: Are the package dimensions identical across all substitute parts?
A: Yes. All parts listed use the 1113 (2835 Metric) package with dimensions of 3.50 mm × 2.80 mm and maximum seated height of 0.75 mm. PCB footprints and reflow profiles are interchangeable.
Q: Can I use SPMWH3228FD5WAW0SE in place of SPMWH3228FD5WAWKS3?
A: The SPMWH3228FD5WAW0SE is mechanically compatible and maintains the same luminous flux (59 lm) and color temperature (2700K). However, the forward voltage is 3.0 V versus 3.1 V, and efficiency is 131 lm/W versus 127 lm/W. This represents a design improvement. Circuit designs must accommodate the 0.1 V voltage difference in current-limiting resistor calculations. The part is "Active" status, suitable for new designs.
Q: What is the significance of "Not For New Designs" status?
A: "Not For New Designs" indicates that Samsung has superseded the part in its product portfolio. While the part remains available in inventory, Samsung does not recommend its use in new product designs. For new designs, select from "Active" status parts: SPMWH1228FD5WAWKSC, SPMWH1228FD5WAW0SC, SPMWH1228FD5WAWMSC, or the LM281BZ+ series variants.
Q: Are all substitute parts RoHS compliant?
A: Yes. All parts listed, including the main part SPMWH3228FD5WAWKS3 and all substitutes, are RoHS compliant and carry MSL 2A (4 Weeks) moisture sensitivity rating.
Q: What is the thermal resistance specification, and why is it important?
A: All parts have thermal resistance of 25°C/W. This parameter defines the temperature rise of the LED junction above ambient for each watt of power dissipated. At 150 mA and 3.1 V (main part), power dissipation is approximately 0.465 W, resulting in a junction temperature rise of approximately 11.6°C above ambient. This specification is critical for thermal management in high-density LED arrays.
Q: Can I mix different substitute parts in the same assembly?
A: Yes, provided the circuit design accommodates the voltage and efficiency variations. Parts with 3.1 V forward voltage (LM281B and LM281B+ series) are directly interchangeable. Parts with 3.0 V forward voltage (LM281BZ+ series) require resistor recalculation but are mechanically and thermally compatible. Mixing parts with different forward voltages in series-connected strings requires circuit analysis.
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