SPMWH1228FD7WAUMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAUMS2 is a Samsung Semiconductor LM281B warm white LED in 2835 metric package (1113 case) rated for 3500K color temperature. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. The LM281B series has been superseded by the LM281B+ and LM281BZ+ variants, which remain in active production. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for ongoing production and field replacement applications.

Substiute Parts

SPMWH1228FD7WAUMS2

Samsung Semiconductor, Inc.In Stock: 642SPMWH1228FD7WAUMS2 Datasheet

Current PartRFQ

SPMWH1228FD7WAUMSA

Samsung Semiconductor, Inc.In Stock: 741SPMWH1228FD7WAUMSA Datasheet

DirectRFQ

SPMWH3228FD5WAV0SA

Samsung Semiconductor, Inc.In Stock: 722SPMWH3228FD5WAV0SA Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAVKSA

Samsung Semiconductor, Inc.In Stock: 999SPMWH3228FD5WAVKSA Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAVMSA

Samsung Semiconductor, Inc.In Stock: 1056SPMWH3228FD5WAVMSA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SPMWH1228FD7WAUMS2 are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Substitute (Drop-in Replacement):

• SPMWH1228FD7WAUMSA (LM281B+): Maintains identical package, mounting type, viewing angle, and test current. Differs only in series designation (LM281B+ vs. LM281B), product status (Active vs. Not For New Designs), thermal resistance (25°C/W vs. 17°C/W), and minor luminous flux variance (50lm vs. 52lm nominal). Forward voltage and maximum current remain unchanged.

Parametric Equivalents (CCT Variation):

• SPMWH3228FD5WAV0SA, SPMWH3228FD5WAVKSA, SPMWH3228FD5WAVMSA (LM281BZ+ series): Share identical package, mounting type, viewing angle, test current, and maximum current. These parts differ in color temperature (3000K vs. 3500K), forward voltage (3V vs. 3.1V), thermal resistance (25°C/W vs. 17°C/W), and CRI (80 vs. 90). Luminous efficacy is higher (116 lm/W vs. 112 lm/W).

Substitution eligibility is determined by: package compatibility (1113/2835), surface mount capability, 120° viewing angle, 150mA nominal operation, and RoHS compliance. Color temperature and CRI differences require application-level validation.

Parameter Comparison

Engineering Selection Recommendations

SPMWH1228FD7WAUMSA (LM281B+): This is the primary direct substitute for the SPMWH1228FD7WAUMS2. Both parts maintain 3500K color temperature and 90 CRI, ensuring color consistency in existing designs. The LM281B+ is in active production status, providing long-term supply assurance. The increased thermal resistance (25°C/W vs. 17°C/W) requires thermal design review in applications with constrained heat dissipation. Luminous flux tolerance is tighter (48–51lm vs. 50–54lm), which may affect brightness uniformity in high-volume applications.

SPMWH3228FD5WAV0SA, SPMWH3228FD5WAVKSA, SPMWH3228FD5WAVMSA (LM281BZ+ series): These parts are parametric equivalents suitable only when 3000K color temperature is acceptable. The lower forward voltage (3V vs. 3.1V) reduces power consumption by approximately 3.2% at nominal current. The higher luminous efficacy (116 lm/W vs. 112 lm/W) provides improved energy efficiency. The reduced CRI (80 vs. 90) may impact color rendering in applications requiring high color fidelity. All three LM281BZ+ variants are electrically and mechanically identical; selection among them depends on supplier availability and inventory status.

All substitute parts maintain RoHS compliance, 2A MSL rating, and 1113 (2835 metric) package compatibility, ensuring compliance with environmental and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAUMSA be used as a direct replacement for SPMWH1228FD7WAUMS2?

A: Yes. Both parts share identical color temperature (3500K), CRI (90), forward voltage (3.1V), test current (150mA), maximum current (160mA), viewing angle (120°), and package (1113/2835 metric). The primary difference is product status (Active vs. Not For New Designs) and thermal resistance (25°C/W vs. 17°C/W). Thermal design review is required for applications with tight thermal budgets.

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

A: The LM281B+ maintains the original 3500K color temperature and 90 CRI of the LM281B. The LM281BZ+ series operates at 3000K with 80 CRI, providing warmer color tone and lower color rendering index. Both series share identical package, mounting type, and current ratings. Selection depends on color temperature requirements of the application.

Q: Are the three LM281BZ+ variants (WAV0SA, WAVKSA, WAVMSA) electrically identical?

A: Yes. SPMWH3228FD5WAV0SA, SPMWH3228FD5WAVKSA, and SPMWH3228FD5WAVMSA are electrically and mechanically identical. All three are LM281BZ+ parts with 3000K color temperature, 3V forward voltage, 150mA test current, and 116 lm/W efficacy. Differences exist only in inventory availability and supplier device package designation. Selection should be based on supply chain availability.

Q: What is the impact of thermal resistance differences on circuit design?

A: The SPMWH1228FD7WAUMS2 has 17°C/W thermal resistance, while all substitute parts have 25°C/W. Higher thermal resistance results in greater junction temperature rise for the same power dissipation. In applications operating at maximum current (160mA) or in thermally constrained environments, the substitute parts may reach higher junction temperatures. Thermal modeling is required to confirm suitability in high-power or high-ambient-temperature applications.

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

A: Mechanical and electrical compatibility is maintained (package, mounting, current ratings). However, the 500K color temperature shift (3500K to 3000K) and 10-point CRI reduction (90 to 80) may affect visual appearance and color rendering. Application-level validation is required to confirm acceptability of the warmer color tone and lower color fidelity.

Q: Are all substitute parts RoHS compliant?

A: Yes. SPMWH1228FD7WAUMSA and all LM281BZ+ variants (SPMWH3228FD5WAV0SA, SPMWH3228FD5WAVKSA, SPMWH3228FD5WAVMSA) are RoHS compliant. All parts maintain 2A MSL rating with 4-week shelf life under controlled conditions.