SPMWH1228FD7WARMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WARMS3 is a surface-mount LED lighting component from Samsung Semiconductor, Inc., featuring the LM281B series with cool white 5000K color temperature. This part is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. The component operates at 3.1V forward voltage with a 150mA test current, delivering 60 lumens at 25°C with a 120° viewing angle in a compact 2835 metric package (1113 case code).

Due to its discontinued status, identifying equivalent substitute parts is essential for design continuity, production support, and inventory management. Substitute parts must maintain electrical compatibility across voltage, current, and luminous flux parameters while preserving mechanical fit within the 2835 package footprint.

Substiute Parts

SPMWH1228FD7WARMS3

Samsung Semiconductor, Inc.In Stock: 768SPMWH1228FD7WARMS3 Datasheet

Current PartRFQ

SPMWH1228FD7WARMSC

Samsung Semiconductor, Inc.In Stock: 899SPMWH1228FD7WARMSC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WARMS3 is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Forward voltage (Vf) must remain at 3.1V typical to ensure direct circuit compatibility without redesign
• Test current of 150mA and maximum current rating of 160mA establish the operating envelope
• Color temperature (5000K cool white) and CRI (90) must be maintained for optical consistency
• Viewing angle of 120° must be preserved for beam pattern compatibility

Mechanical Compatibility Criteria:

• Package code 1113 (2835 metric) is mandatory for PCB footprint alignment
• Dimensions of 3.50mm × 2.80mm length and width must match exactly
• Maximum seated height of 0.75mm ensures clearance in existing assemblies

Regulatory & Environmental Criteria:

• RoHS compliance status must be maintained
• Moisture sensitivity level (MSL 2A) establishes handling and storage requirements

The substitute part SPMWH1228FD7WARMSC meets all these criteria while offering an active product status alternative to the discontinued SPMWH1228FD7WARMS3.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWH1228FD7WARMSC

The SPMWH1228FD7WARMSC is the direct substitute for SPMWH1228FD7WARMS3 based on the following engineering factors:

Electrical Compatibility: All critical electrical parameters align exactly: forward voltage (3.1V), test current (150mA), maximum current (160mA), color temperature (5000K), and CRI (90). The luminous flux difference of 6.7% (60lm vs. 56lm) and efficiency difference of 7.0% (129 lm/W vs. 120 lm/W) fall within acceptable tolerance ranges for LED lighting applications and do not require circuit redesign.

Mechanical Compatibility: The 2835 metric package (1113 case code) dimensions and maximum seated height are identical, ensuring direct PCB footprint compatibility without layout modifications.

Product Status & Compliance: The substitute part carries "Active" product status, ensuring long-term availability and supply chain continuity. Both parts maintain RoHS compliance and identical MSL ratings (2A, 4 Weeks), preserving regulatory and handling requirements.

Thermal Consideration: The substitute exhibits higher thermal resistance (25°C/W vs. 17°C/W). In applications with stringent thermal constraints or high ambient temperatures, thermal modeling should confirm that the increased thermal resistance does not exceed system design limits. For standard lighting applications operating within normal thermal envelopes, this difference is acceptable.

Recommendation: The SPMWH1228FD7WARMSC is suitable for direct substitution in existing designs without circuit or layout modifications. The part is recommended for new production orders and design continuity support.

Frequently Asked Questions (FAQ)

Q1: Can SPMWH1228FD7WARMSC be used as a direct drop-in replacement for SPMWH1228FD7WARMS3?

A: Yes. Both parts share identical forward voltage (3.1V), test current (150mA), package dimensions (2835 metric, 3.50mm × 2.80mm), and maximum seated height (0.75mm). No circuit redesign or PCB layout modification is required.

Q2: What is the significance of the luminous flux difference (60lm vs. 56lm)?

A: The substitute delivers 6.7% lower luminous flux at the test current of 150mA. This difference is within typical LED manufacturing tolerances and does not require circuit adjustment. Applications requiring exact lumen output should evaluate whether this variance affects system performance specifications.

Q3: Why does the substitute have higher thermal resistance (25°C/W vs. 17°C/W)?

A: The thermal resistance difference reflects variations in the internal package design between the LM281B and LM281B+ series. For most standard lighting applications, this increase does not create thermal management issues. High-power or thermally constrained applications should perform thermal analysis to confirm compatibility.

Q4: Are the color temperature and CRI identical between the two parts?

A: Yes. Both parts are specified at 5000K cool white with CRI 90, ensuring identical color quality and rendering characteristics.

Q5: What is the viewing angle for both parts?

A: Both parts have a 120° viewing angle, providing identical beam pattern characteristics for optical system design.

Q6: Are there any differences in RoHS compliance or moisture sensitivity?

A: No. Both parts are RoHS compliant and carry identical MSL ratings (2A, 4 Weeks), requiring the same handling and storage protocols.

Q7: Why is the original part marked "Not For New Designs"?

A: This designation indicates the SPMWH1228FD7WARMS3 has reached end-of-life status in Samsung's product portfolio. The SPMWH1228FD7WARMSC (LM281B+ series) is the active replacement, ensuring continued availability and supply chain support.

Q8: Can both parts be used interchangeably in existing production?

A: Yes, provided the 6.7% luminous flux variance and 8°C/W thermal resistance increase are acceptable for the application. No circuit or assembly process changes are required.

Q9: What packaging format is available for both parts?

A: Both parts are supplied in Tape & Reel (TR) format, standard for automated surface-mount assembly processes.

Q10: Are there any certifications or compliance documents specific to these parts?

A: Both parts are RoHS compliant and carry ECCN EAR99 and HTSUS 8541.41.0000 classifications. Refer to Samsung Semiconductor's technical documentation for detailed compliance certificates and test reports.