SPMWH1228FD5WAWUS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAWUS4 is a Samsung Semiconductor LM281B warm white LED in 2835 metric package (1113 case). This surface mount LED operates at 2700K color temperature with 3.1V forward voltage and 150mA test current, delivering 63 lumens at 25°C with 135 lm/W efficiency and 80 CRI. The part is marked as "Not For New Designs," making identification of active equivalent alternatives essential for ongoing production and new design initiatives. Substitute parts maintain identical optical, thermal, and mechanical specifications while offering improved product status or alternative packaging configurations.

Substiute Parts

SPMWH1228FD5WAWUS4

Samsung Semiconductor, Inc.In Stock: 40493SPMWH1228FD5WAWUS4 Datasheet

Current PartRFQ

SPMWH1228FD5WAW0SE

Samsung Semiconductor, Inc.In Stock: 900SPMWH1228FD5WAW0SE Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WAWKSE

Samsung Semiconductor, Inc.In Stock: 724SPMWH1228FD5WAWKSE Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WAWMS4

Samsung Semiconductor, Inc.In Stock: 8027SPMWH1228FD5WAWMS4 Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WAWMSE

Samsung Semiconductor, Inc.In Stock: 833SPMWH1228FD5WAWMSE Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WAWUSE

Samsung Semiconductor, Inc.In Stock: 841SPMWH1228FD5WAWUSE Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAW0SG

Samsung Semiconductor, Inc.In Stock: 1012SPMWH3228FD5WAW0SG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAWKSG

Samsung Semiconductor, Inc.In Stock: 1204SPMWH3228FD5WAWKSG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAWMSG

Samsung Semiconductor, Inc.In Stock: 969SPMWH3228FD5WAWMSG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Color: White, Warm
• CCT: 2700K
• Flux @ 25°C, 150mA: 63 lm (61–65 lm range)
• Test Current: 150mA
• Maximum Current: 160mA
• CRI: 80
• Viewing Angle: 120°
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 3.50 × 2.80 mm
• Height - Seated (Max): 0.75 mm
• Thermal Resistance: 25°C/W
• RoHS Compliance: Yes
• MSL: 2A (4 Weeks)

Allowable Variation:

• Forward Voltage (Vf): 3.0V to 3.1V (within typical operating range)
• Lumens/Watt: 135–140 lm/W (efficiency variance acceptable within series)
• Series Designation: LM281B, LM281B+, or LM281BZ+ (all within LM281 family)
• Product Status: Active preferred over "Not For New Designs"
• Packaging Configuration: Tape & Reel (TR) or unspecified packaging

All listed substitute parts maintain identical optical output, thermal characteristics, and mechanical compatibility with the main part SPMWH1228FD5WAWUS4.

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs (Continuation Supply): SPMWH1228FD5WAWMS4 provides direct compatibility with identical electrical and optical specifications. Both parts carry "Not For New Designs" status and share LM281B series designation. This part maintains 3.1V forward voltage and 135 lm/W efficiency matching the original specification.

For New Designs (Active Status Preferred): SPMWH1228FD5WAW0SE, SPMWH1228FD5WAWKSE, and SPMWH1228FD5WAWMSE are LM281B+ variants with Active product status. These parts maintain 3.1V forward voltage, 63 lm flux output, and 135 lm/W efficiency. Selection among these three is based on packaging configuration and inventory availability.

For Optimized Efficiency (3.0V Forward Voltage): SPMWH1228FD5WAWUSE, SPMWH3228FD5WAW0SG, SPMWH3228FD5WAWKSG, and SPMWH3228FD5WAWMSG operate at 3.0V forward voltage with improved 140 lm/W efficiency. These parts deliver identical 63 lm flux output at 150mA test current. SPMWH3228 variants represent LM281BZ+ series with enhanced performance characteristics. All four options carry Active product status and RoHS compliance.

Compliance Considerations: All substitute parts maintain RoHS compliance, 2A MSL rating (4 weeks), and identical thermal resistance (25°C/W). Forward voltage reduction from 3.1V to 3.0V in optimized variants reduces power dissipation by approximately 3.2% at 150mA operation, improving thermal performance in high-density applications.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAWUSE replace SPMWH1228FD5WAWUS4 in existing PCB assemblies?

A: Yes. Both parts share identical package dimensions (3.50 × 2.80 mm), height (0.75 mm max), and surface mount footprint. The 0.1V reduction in forward voltage (3.1V to 3.0V) is within typical LED operating tolerance and requires no circuit redesign. Flux output remains 63 lm at 150mA test current.

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

A: All three series maintain identical optical output (63 lm at 2700K, 80 CRI) and mechanical compatibility. LM281B+ and LM281BZ+ variants offer Active product status versus "Not For New Designs" for LM281B. LM281BZ+ additionally operates at 3.0V forward voltage with 140 lm/W efficiency compared to 3.1V and 135 lm/W for LM281B variants.

Q: Are there packaging differences between SPMWH1228 and SPMWH3228 base part numbers?

A: Input data specifies Tape & Reel (TR) packaging for SPMWH1228 variants and unspecified packaging for SPMWH3228 variants. Both maintain identical 1113 (2835 metric) case and surface mount configuration. Verify packaging requirements with supplier documentation before procurement.

Q: Does forward voltage reduction affect circuit design?

A: Forward voltage reduction from 3.1V to 3.0V at 150mA test current reduces power dissipation by approximately 15 mW per LED. For series-connected LED strings, cumulative voltage reduction must be calculated. For parallel or individually driven configurations, no circuit modification is required.

Q: Which substitute part offers the best long-term availability?

A: SPMWH1228FD5WAWUSE, SPMWH3228FD5WAW0SG, SPMWH3228FD5WAWKSG, and SPMWH3228FD5WAWMSG all carry Active product status, indicating ongoing production support. LM281B+ and LM281BZ+ series designation confirms Samsung's commitment to these product lines for future supply.

Q: Is thermal resistance identical across all substitute parts?

A: Yes. All substitute parts maintain 25°C/W thermal resistance package rating. Thermal performance in application depends on PCB thermal design, solder pad area, and ambient conditions independent of part selection.

Q: Can SPMWH3228 variants be used interchangeably with SPMWH1228 variants?

A: Yes, for optical and thermal performance. Both base part numbers deliver 63 lm at 2700K with 80 CRI and 120° viewing angle in identical 2835 metric package. Verify packaging configuration (Tape & Reel versus bulk) matches procurement requirements.