SPMWH3228FD5WATKSG LED Equivalent & Substitute Parts

Part Overview

The SPMWH3228FD5WATKSG is a Samsung Semiconductor surface-mount LED lighting component featuring the LM281BZ+ series. This neutral white 4000K LED operates at 3V with a 150mA test current, delivering 67 lumens at 25°C with a 120° viewing angle in a 2835 metric package (1113 case size). The component is currently in Active product status with 902 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design revisions call for compatible alternatives that maintain electrical and optical performance within specified tolerances.

Substiute Parts

SPMWH3228FD5WATKSG

Samsung Semiconductor, Inc.In Stock: 1010SPMWH3228FD5WATKSG Datasheet

Current PartRFQ

SPMWH1228FD5WAT0S4

Samsung Semiconductor, Inc.In Stock: 39970SPMWH1228FD5WAT0S4 Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WATMS4

Samsung Semiconductor, Inc.In Stock: 8564SPMWH1228FD5WATMS4 Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WATUS4

Samsung Semiconductor, Inc.In Stock: 38998SPMWH1228FD5WATUS4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH3228FD5WATKSG is determined by the following critical parameters:

Mandatory Matching Parameters:

• Color: White, Neutral
• Correlated Color Temperature: 4000K
• Luminous Flux @ 25°C: 67 lm (65–69 lm range)
• Test Current: 150 mA
• Maximum Current: 160 mA
• Viewing Angle: 120°
• Color Rendering Index: 80
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 3.50 × 2.80 mm footprint, 0.75 mm height
• Thermal Resistance: 25°C/W
• RoHS Compliance: Required
• MSL Rating: 2A (4 Weeks)

Allowable Variation Parameters:

• Forward Voltage (Vf): ±0.1V tolerance permitted (3.0V nominal to 3.1V nominal)
• Lumens/Watt efficiency: Variation acceptable within flux tolerance range
• Series designation: LM281B or LM281BZ+ acceptable
• Packaging format: Tape & Reel (TR) or alternative standard packaging acceptable
• Product Status: Active or Not For New Designs both acceptable for substitution

The three substitute parts listed below meet all mandatory matching parameters and fall within allowable variation ranges for forward voltage.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: SPMWH3228FD5WATKSG

The SPMWH3228FD5WATKSG maintains Active product status and represents the current production standard for this LED specification. It delivers 149 lm/W efficiency at the specified 150 mA test current with a 3.0V forward voltage. This part is recommended for new designs and applications requiring the latest component generation.

Secondary Selection: SPMWH1228FD5WATUS4, SPMWH1228FD5WAT0S4, or SPMWH1228FD5WATMS4

All three substitute parts are designated as "Not For New Designs" but remain electrically and optically compatible with the primary part. These LM281B series components operate at 3.1V forward voltage (0.1V higher than the primary part) while maintaining identical luminous flux output (67 lm), viewing angle (120°), CRI (80), and all physical and thermal specifications.

Substitution Criteria:

• Electrical Compatibility: Forward voltage difference of 0.1V is within acceptable circuit design tolerance for LED driver circuits with current regulation. The 3.1V specification does not exceed maximum ratings and maintains identical current handling (150 mA test, 160 mA maximum).

• Optical Compatibility: Luminous flux remains constant at 67 lm (65–69 lm range) across all parts. Color temperature (4000K neutral white) and CRI (80) are identical. Viewing angle (120°) is unchanged.

• Mechanical Compatibility: All parts share identical 2835 metric package dimensions (3.50 × 2.80 × 0.75 mm), surface-mount configuration, and thermal resistance (25°C/W).

• Compliance: All substitute parts maintain RoHS compliance and MSL 2A (4 Weeks) rating, meeting regulatory and manufacturing requirements.

• Inventory Availability: Substitute parts show significantly higher stock levels (8,482–39,914 units) compared to the primary part (902 units), providing supply chain flexibility.

Selection Logic:

Choose SPMWH3228FD5WATKSG for new designs and applications where Active product status is required. Select any of the three LM281B substitutes when the primary part is unavailable, when higher inventory availability is needed, or when design revisions permit use of Not For New Designs components. The 0.1V forward voltage increase in substitute parts requires verification that the LED driver circuit can accommodate this variation, but no circuit redesign is necessary for standard current-regulated driver topologies.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATUS4, SPMWH1228FD5WAT0S4, and SPMWH1228FD5WATMS4 be used interchangeably with SPMWH3228FD5WATKSG?

A: Yes, within the constraints of your circuit design. All three substitute parts deliver identical luminous flux (67 lm), color temperature (4000K), CRI (80), and viewing angle (120°). The primary difference is forward voltage: substitutes operate at 3.1V versus 3.0V for the main part. Current-regulated LED driver circuits accommodate this 0.1V variation without modification. Verify your specific driver circuit specifications before substitution.

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

A: SPMWH1228FD5WATUS4, SPMWH1228FD5WAT0S4, and SPMWH1228FD5WATMS4 are electrically and optically identical. The designations reflect different packaging or distribution channels (indicated by the suffix codes: US, 0S, and MS). All three are supplied in Tape & Reel (TR) format. Selection among these three should be based on inventory availability and supply chain logistics rather than technical performance.

Q: Why is the main part SPMWH3228FD5WATKSG marked Active while substitutes are marked Not For New Designs?

A: Product status reflects Samsung's manufacturing roadmap. The LM281BZ+ series (main part) represents the current production generation, while the LM281B series (substitutes) represents an earlier generation. Both generations meet identical electrical and optical specifications for this 4000K neutral white LED application. Not For New Designs status does not indicate inferior performance; it indicates that the manufacturer is transitioning to newer series for future production. Existing designs using LM281B substitutes remain fully supported.

Q: Are there any thermal or reliability differences between the main part and substitutes?

A: No. All parts share identical thermal resistance (25°C/W), maximum current rating (160 mA), and MSL rating (2A, 4 Weeks). Thermal performance and reliability characteristics are equivalent across all four parts.

Q: What does the 0.1V forward voltage difference mean for my circuit?

A: In a current-regulated LED driver circuit (the standard topology for LED applications), the forward voltage difference is absorbed by the driver's voltage headroom and does not affect LED brightness or performance. The driver maintains constant current (150 mA) regardless of whether the LED forward voltage is 3.0V or 3.1V. If your circuit uses a simple series resistor (voltage-regulated topology), verify that your supply voltage provides sufficient headroom for the 3.1V substitute parts. Most standard 5V or 12V supplies accommodate this variation without issue.

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

A: Yes, provided your circuit design accommodates the 3.1V forward voltage of substitutes. Since all parts deliver identical luminous flux, color, and viewing angle, mixed batches will produce visually and functionally identical results in current-regulated driver circuits. For voltage-regulated circuits, confirm adequate supply voltage headroom before mixing parts.

Q: What is the inventory status, and which part should I order?

A: The main part SPMWH3228FD5WATKSG has 902 units in stock. Substitute parts have significantly higher availability: SPMWH1228FD5WATUS4 (38,946 units), SPMWH1228FD5WAT0S4 (39,914 units), and SPMWH1228FD5WATMS4 (8,482 units). For immediate availability or large-volume orders, substitutes offer superior supply chain flexibility. For new designs prioritizing the latest component generation, order the main part.

Q: Are all parts RoHS compliant?

A: Yes. SPMWH3228FD5WATKSG and all three substitute parts are RoHS Compliant, meeting EU Directive 2011/65/EU requirements. All parts are suitable for applications requiring RoHS certification.

Q: What is the MSL rating, and why does it matter?

A: All parts carry MSL 2A (4 Weeks) rating, indicating that components must be used within 4 weeks of opening the moisture-sealed packaging. This is standard for surface-mount LEDs and requires standard moisture control procedures during assembly (baking if components are stored beyond 4 weeks). No special handling beyond industry-standard practices is required.