SPMWH1228FD5WATMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WATMS4 is a Samsung Semiconductor LM281B series surface-mount LED in 2835 metric package (1113 case code). This neutral white 4000K LED operates at 3.1V forward voltage with 150mA test current, delivering 67 lumens at 25°C and 144 lumens per watt efficiency. The component features 80 CRI (Color Rendering Index) and 120° viewing angle, suitable for general lighting applications.

The SPMWH1228FD5WATMS4 carries a "Not For New Designs" product status, indicating Samsung has transitioned this model to end-of-life. This status necessitates identification of equivalent substitute parts for ongoing production requirements and new design implementations.

Substiute Parts

SPMWH1228FD5WATMS4

Samsung Semiconductor, Inc.In Stock: 8564SPMWH1228FD5WATMS4 Datasheet

Current PartRFQ

SPMWH1228FD5WATMSE

Samsung Semiconductor, Inc.In Stock: 1178SPMWH1228FD5WATMSE Datasheet

DirectRFQ

SPMWH1228FD5WAT0S4

Samsung Semiconductor, Inc.In Stock: 39970SPMWH1228FD5WAT0S4 Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WATUS4

Samsung Semiconductor, Inc.In Stock: 38998SPMWH1228FD5WATUS4 Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAT0SG

Samsung Semiconductor, Inc.In Stock: 848SPMWH3228FD5WAT0SG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATKSG

Samsung Semiconductor, Inc.In Stock: 1010SPMWH3228FD5WATKSG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATMSG

Samsung Semiconductor, Inc.In Stock: 746SPMWH3228FD5WATMSG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH1228FD5WATMS4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Color: White, Neutral
• CCT: 4000K
• Package / Case: 1113 (2835 Metric)
• Flux @ 25°C, 150mA: 67 lm (65–69 lm range)
• Test Current: 150mA
• Maximum Current: 160mA
• Viewing Angle: 120°
• CRI: 80
• RoHS Compliance: Required

Secondary Compatibility Parameters:

• Forward Voltage (Vf) Typical: 3.0V to 3.1V
• Lumens/Watt: 144–149 lm/W
• Thermal Resistance: 25°C/W
• Mounting Type: Surface Mount
• MSL Rating: 2A (4 Weeks)

Substitute parts are classified into two categories:

Direct Manufacturer Substitutes: Parts from the same manufacturer (Samsung) with identical electrical and mechanical specifications but different product series designations or packaging codes.

Parametric Equivalents: Parts meeting all critical electrical parameters (flux, current, voltage, CRI, viewing angle) and mechanical specifications (package, size, height) with allowable variations in forward voltage (±0.1V) and efficiency (±5 lm/W).

Parameter Comparison

Engineering Selection Recommendations

For Existing Production (Maintenance & Repair):

SPMWH1228FD5WAT0S4 and SPMWH1228FD5WATUS4 are direct parametric equivalents with identical electrical specifications (3.1V, 67 lm, 144 lm/W) and mechanical compatibility. Both parts maintain LM281B series designation and "Not For New Designs" status, ensuring design continuity. SPMWH1228FD5WAT0S4 offers significantly higher inventory (39,914 units) compared to the original part (8,482 units), providing supply security for ongoing production.

For New Design Implementation:

SPMWH1228FD5WATMSE (LM281B+ series, Active status) is the recommended primary substitute. This part delivers improved performance (68 lm, 146 lm/W) while maintaining identical forward voltage (3.1V), package (2835), and mechanical dimensions. Active product status ensures long-term availability and continued manufacturer support.

SPMWH3228FD5WAT0SG, SPMWH3228FD5WATKSG, and SPMWH3228FD5WATMSG (LM281BZ+ series, Active status) are secondary alternatives for new designs. These parts operate at 3.0V forward voltage (0.1V lower than original) with equivalent flux output (67 lm) and superior efficiency (149 lm/W). The 0.1V reduction in forward voltage requires circuit verification to confirm compatibility with existing current-limiting resistor networks and power supply specifications.

All substitute parts maintain RoHS compliance, 80 CRI, 120° viewing angle, 2835 package, and 25°C/W thermal resistance, ensuring functional equivalence in neutral white 4000K lighting applications.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATMSE replace SPMWH1228FD5WATMS4 in existing designs?

A: Yes. SPMWH1228FD5WATMSE is a direct substitute with identical forward voltage (3.1V), package (2835), and mechanical dimensions. The part delivers higher flux (68 lm vs. 67 lm) and efficiency (146 lm/W vs. 144 lm/W), representing performance improvement. Active product status provides superior long-term availability compared to the "Not For New Designs" original part.

Q: What is the difference between SPMWH1228FD5WAT0S4 and SPMWH1228FD5WATUS4?

A: Both parts are parametric equivalents with identical electrical specifications (3.1V, 67 lm, 144 lm/W) and mechanical compatibility. The difference lies in packaging code designation and inventory availability. SPMWH1228FD5WAT0S4 offers 39,914 units in stock versus 38,946 units for SPMWH1228FD5WATUS4. Both maintain LM281B series designation and "Not For New Designs" status.

Q: Can LM281BZ+ series parts (SPMWH3228 prefix) substitute for LM281B series (SPMWH1228 prefix)?

A: Electrical substitution is possible with circuit verification. LM281BZ+ parts operate at 3.0V forward voltage compared to 3.1V for LM281B, representing a 0.1V reduction. Flux output (67 lm) and viewing angle (120°) are identical. The lower forward voltage may affect current-limiting resistor calculations and power supply margin requirements. Confirm circuit compatibility before implementation.

Q: Why do SPMWH3228 parts show "Unspecified" packaging?

A: Packaging information for SPMWH3228FD5WAT0SG, SPMWH3228FD5WATKSG, and SPMWH3228FD5WATMSG is not provided in the available technical data. All three parts maintain identical 2835 metric package / case designation and 3.50mm × 2.80mm × 0.75mm mechanical dimensions as the original part, confirming PCB footprint compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain RoHS compliance status, meeting environmental and regulatory requirements for new product designs and existing production applications.

Q: What is the significance of "Not For New Designs" status?

A: This designation indicates Samsung has discontinued active development and long-term support for the LM281B series. Parts carrying this status remain available from existing inventory but are not recommended for new design implementations. SPMWH1228FD5WATMSE (LM281B+, Active) and LM281BZ+ series parts (Active) are preferred for new designs to ensure manufacturer support and extended product lifecycle.