SPMWH1228FD5WAPMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAPMS4 is a Samsung Semiconductor LM281B cool white LED in 2835 metric package (1113 case) designed for surface mount lighting applications. This component operates at 3.1V forward voltage with 150mA test current, delivering 67 lumens at 25°C with a color temperature of 6500K and 80 CRI. The part is classified as Not For New Designs, indicating it has reached end-of-life status. Equivalent and substitute parts are necessary for ongoing production support, design continuity, and component availability assurance.

Substiute Parts

SPMWH1228FD5WAPMS4

Samsung Semiconductor, Inc.In Stock: 744SPMWH1228FD5WAPMS4 Datasheet

Current PartRFQ

SPMWH1228FD5WAPMSE

Samsung Semiconductor, Inc.In Stock: 951SPMWH1228FD5WAPMSE Datasheet

DirectRFQ

SPMWH3228FD5WAP0SG

Samsung Semiconductor, Inc.In Stock: 801SPMWH3228FD5WAP0SG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAPKSG

Samsung Semiconductor, Inc.In Stock: 1004SPMWH3228FD5WAPKSG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAPMSG

Samsung Semiconductor, Inc.In Stock: 938SPMWH3228FD5WAPMSG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WAPMS4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Color: White, Cool
• CCT: 6500K
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• CRI: 80
• Viewing Angle: 120°
• Current - Test: 150 mA
• Current - Maximum: 160 mA
• Thermal Resistance: 25°C/W
• RoHS Status: RoHS Compliant
• MSL: 2A (4 Weeks)

Acceptable Variation Parameters:

• Voltage - Forward (Vf): 3.0V to 3.1V (within typical operating range)
• Flux @ 25°C: 65–70 lm range (within specification tolerance)
• Lumens/Watt: 144–149 lm/W (efficiency variation acceptable within series evolution)
• Series: LM281B, LM281B+, LM281BZ+ (same base product family with incremental improvements)
• Product Status: Active parts preferred over Not For New Designs

Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (same series generation) and Parametric Equivalents (evolved series with compatible electrical and mechanical specifications).

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent (Recommended for Immediate Replacement):

SPMWH1228FD5WAPMSE is the primary substitute for SPMWH1228FD5WAPMS4. This part maintains identical electrical and mechanical specifications while offering Active product status. The LM281B+ series represents an incremental improvement over the LM281B, with luminous flux increased to 68 lm (66–70 lm range) and efficiency improved to 146 lm/W. Forward voltage remains at 3.1V, ensuring direct circuit compatibility. All compliance certifications, package dimensions, and thermal characteristics are identical. This part is suitable for drop-in replacement in existing designs.

Parametric Equivalents (Alternative for New Designs or Long-Term Supply):

The SPMWH3228FD5WAP0SG, SPMWH3228FD5WAPKSG, and SPMWH3228FD5WAPMSG parts represent the LM281BZ+ series evolution. These parts maintain all critical parameters including color, CCT, CRI, package, and thermal characteristics. The primary difference is forward voltage reduction from 3.1V to 3.0V, resulting in improved efficiency (149 lm/W). This voltage reduction is within acceptable operating margins for most LED driver circuits. All three LM281BZ+ variants are Active products with full RoHS compliance and identical MSL ratings. These parts are suitable for designs requiring long-term component availability and improved power efficiency.

Compliance and Certification:

All substitute parts maintain RoHS Compliance and MSL 2A (4 Weeks) ratings, ensuring compatibility with standard manufacturing processes and storage requirements. ECCN and HTSUS classifications remain consistent across all variants.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAPMSE be used as a direct replacement for SPMWH1228FD5WAPMS4?

A: Yes. SPMWH1228FD5WAPMSE is a direct manufacturer equivalent with identical electrical specifications (3.1V, 150mA), mechanical dimensions (2835 package, 3.50 × 2.80 mm), and thermal characteristics (25°C/W). The only differences are improved luminous flux (68 lm vs. 67 lm) and efficiency (146 lm/W vs. 144 lm/W), both favorable for performance. No circuit modifications are required.

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

A: The LM281B+ (SPMWH1228FD5WAPMSE) maintains the original 3.1V forward voltage with improved flux output. The LM281BZ+ series (SPMWH3228 variants) reduces forward voltage to 3.0V while maintaining or improving luminous flux and efficiency. Both series share identical color temperature (6500K), CRI (80), package (2835), and thermal properties. The voltage reduction in LM281BZ+ improves power efficiency and reduces thermal load.

Q: Are the three LM281BZ+ variants (SPMWH3228FD5WAP0SG, SPMWH3228FD5WAPKSG, SPMWH3228FD5WAPMSG) interchangeable?

A: Yes. All three LM281BZ+ variants are parametrically identical with respect to electrical performance, optical characteristics, and mechanical specifications. Differences exist only in packaging designation codes (WAP0SG, WAPKSG, WAPMSG), which reflect internal Samsung supply chain or regional distribution variants. They are functionally interchangeable in circuit applications.

Q: Why is the main part (SPMWH1228FD5WAPMS4) marked as "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and Samsung is no longer recommending it for new product development. Existing inventory remains available for production support. For new designs, SPMWH1228FD5WAPMSE (LM281B+) or the LM281BZ+ variants are recommended as they offer Active product status and improved performance characteristics.

Q: What is the impact of the 0.1V forward voltage difference between LM281B+ (3.1V) and LM281BZ+ (3.0V)?

A: The 0.1V reduction in forward voltage results in lower power dissipation and improved luminous efficiency (149 lm/W vs. 146 lm/W). For a 150mA LED driver circuit, this represents approximately 15 mW lower power consumption per LED. Most modern LED driver circuits accommodate this voltage variation through current regulation. Circuit redesign is not required, though efficiency gains may be realized in high-volume applications.

Q: Are all substitute parts RoHS compliant and suitable for standard manufacturing processes?

A: Yes. All substitute parts maintain RoHS Compliance and MSL 2A (4 Weeks) ratings, identical to the main part. This ensures compatibility with standard reflow soldering processes and storage requirements. No special handling or process modifications are necessary.

Q: Can the LM281BZ+ parts be used in existing PCB designs without layout modifications?

A: Yes. All substitute parts maintain identical package dimensions (1113 / 2835 metric), footprint (3.50 × 2.80 mm), and height (0.75 mm maximum). PCB layouts, solder paste stencils, and pick-and-place programming require no modifications. The parts are mechanically and electrically compatible with existing designs.

Q: What is the luminous flux tolerance across all substitute parts?

A: The main part specifies 67 lm (65–69 lm range) at 25°C and 150mA. SPMWH1228FD5WAPMSE specifies 68 lm (66–70 lm range), and all LM281BZ+ variants specify 67 lm (65–69 lm range). All values fall within acceptable tolerance bands for cool white 6500K LEDs in the 2835 package category. Flux variation across the substitute group is less than 2 lm, which is negligible for most lighting applications.