Equivalent & Substitute Parts for SPMWH1228FD5WATMS2

Part Overview

The SPMWH1228FD5WATMS2 is a Samsung Semiconductor LM281B series neutral white LED in 2835 metric package (1113 case) designed for surface mount applications. This component operates at 4000K color temperature with 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary to support existing production lines, maintenance requirements, and design transitions to active product alternatives.

Substiute Parts

SPMWH1228FD5WATMS2

Samsung Semiconductor, Inc.In Stock: 886SPMWH1228FD5WATMS2 Datasheet

Current PartRFQ

SPMWH1228FD5WATMSA

Samsung Semiconductor, Inc.In Stock: 859SPMWH1228FD5WATMSA Datasheet

DirectRFQ

SPMWH3228FD5WAT0SC

Samsung Semiconductor, Inc.In Stock: 1031SPMWH3228FD5WAT0SC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATKSC

Samsung Semiconductor, Inc.In Stock: 1205SPMWH3228FD5WATKSC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATMSC

Samsung Semiconductor, Inc.In Stock: 1033SPMWH3228FD5WATMSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WATMS2 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Color: White, Neutral
• CCT: 4000K
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• CRI: 80
• Viewing Angle: 120°
• Thermal Resistance: 25°C/W
• RoHS Compliance: Required
• MSL: 2A (4 Weeks)

Secondary Compatibility Parameters:

• Current - Test: 150mA (allowable range 150mA nominal)
• Voltage - Forward (Vf): 3.0V to 3.1V (acceptable tolerance)
• Flux @ 25°C: 57–62lm range (acceptable performance window)
• Lumens/Watt: 127–131 lm/W (acceptable efficiency range)
• Current - Maximum: 160mA (standard rating)

Substitute parts must maintain identical package dimensions, thermal characteristics, and compliance certifications. Variations in forward voltage (3.0V vs. 3.1V) and luminous flux within specified ranges are acceptable for circuit-level compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Substitute:

SPMWH1228FD5WATMSA (LM281B+ series) is the primary direct substitute for SPMWH1228FD5WATMS2. This part maintains identical electrical specifications within acceptable tolerances (Vf 3.1V, flux 60lm nominal) and is classified as Active product status. It provides improved efficiency (129 lm/W vs. 127 lm/W) while maintaining full compatibility with existing PCB layouts and thermal management designs. This substitute is suitable for immediate replacement in production environments.

Parametric Equivalent Substitutes:

SPMWH3228FD5WAT0SC, SPMWH3228FD5WATKSC, and SPMWH3228FD5WATMSC (LM281BZ+ series) are parametric equivalents offering enhanced efficiency (131 lm/W) with a 0.1V reduction in forward voltage (3.0V vs. 3.1V). These parts maintain identical package geometry, thermal resistance, and compliance certifications. The lower forward voltage may reduce power dissipation in current-limited applications. All three LM281BZ+ variants are Active product status and suitable for new production integration or retrofit applications where efficiency improvement is beneficial.

Product Status Consideration:

The main part SPMWH1228FD5WATMS2 is designated "Not For New Designs." All substitute parts listed are Active status, making them appropriate for both legacy support and forward-looking design transitions.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATMSA be used as a direct drop-in replacement for SPMWH1228FD5WATMS2?

A: Yes. SPMWH1228FD5WATMSA maintains identical package dimensions (3.50mm × 2.80mm, 0.75mm height), thermal resistance (25°C/W), and electrical specifications within acceptable tolerance (Vf 3.1V, flux 60lm nominal). PCB footprints and thermal vias require no modification.

Q: What is the difference between the LM281B+ and LM281BZ+ series substitutes?

A: The LM281B+ (SPMWH1228FD5WATMSA) maintains the original 3.1V forward voltage. The LM281BZ+ variants (SPMWH3228 base number) operate at 3.0V forward voltage with improved efficiency (131 lm/W vs. 127–129 lm/W). Both series are electrically compatible within the specified parameter ranges. The 0.1V difference may affect circuit current-limiting calculations in precision applications.

Q: Are all substitute parts RoHS compliant and MSL rated identically?

A: Yes. All substitute parts listed are RoHS Compliant and carry MSL 2A (4 Weeks) rating, matching the main part specification.

Q: Can the LM281BZ+ parts be used in applications originally designed for LM281B?

A: Yes, provided the circuit design accommodates the 3.0V forward voltage specification. The lower Vf may reduce power dissipation by approximately 3% (0.1V × 150mA = 15mW reduction). Verify that current-limiting resistor values and power supply voltage margins remain within acceptable design tolerances.

Q: What inventory levels are available for each substitute?

A: SPMWH1228FD5WATMSA: 833 Pcs; SPMWH3228FD5WAT0SC: 991 Pcs; SPMWH3228FD5WATKSC: 1165 Pcs; SPMWH3228FD5WATMSC: 970 Pcs. All parts are listed as New Original In Stock.

Q: Are there packaging differences between the substitute parts?

A: SPMWH1228FD5WATMSA is supplied in Tape & Reel (TR) packaging. The LM281BZ+ variants (SPMWH3228 series) do not specify packaging format in the provided data. Confirm packaging requirements with supplier documentation before procurement.

Q: Which substitute should be selected for new product designs?

A: SPMWH1228FD5WATMSA (LM281B+) or any LM281BZ+ variant are appropriate for new designs, as all are Active product status. LM281BZ+ parts offer efficiency advantage (131 lm/W). Selection depends on forward voltage tolerance requirements and inventory availability.