SPMWH1228FD7WAQMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAQMS3 is a Samsung Semiconductor LM281B series cool white LED in 2835 metric package (1113 case). This surface mount LED operates at 3.1V forward voltage with 150mA test current, delivering 59 lumens at 25°C with a color temperature of 5700K and 90 CRI. The part is marked as Not For New Designs, indicating end-of-life status. Identification of equivalent substitute parts is necessary for ongoing production support and component availability management.

Substiute Parts

SPMWH1228FD7WAQMS3

Samsung Semiconductor, Inc.In Stock: 1113SPMWH1228FD7WAQMS3 Datasheet

Current PartRFQ

SPMWH1228FD7WAQMSC

Samsung Semiconductor, Inc.In Stock: 986SPMWH1228FD7WAQMSC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAQMS3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Color specification: White, Cool 5700K
• Package type: 1113 (2835 Metric) surface mount
• Forward voltage: 3.1V nominal
• Test current: 150mA
• Viewing angle: 120°
• CRI: 90
• Compliance: RoHS Compliant, MSL 2A

The substitute part SPMWH1228FD7WAQMSC belongs to the LM281B+ series, an active product variant of the same base product number (SPMWH1228). Both parts share identical mechanical packaging, electrical operating point (3.1V, 150mA), color specification (5700K cool white), and compliance certifications. The LM281B+ represents the current production equivalent for the obsolete LM281B series.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWH1228FD7WAQMSC

The SPMWH1228FD7WAQMSC is the direct substitute for SPMWH1228FD7WAQMS3. Selection is based on the following engineering criteria:

1. Product Status Alignment: The main part is marked Not For New Designs. The substitute part SPMWH1228FD7WAQMSC carries Active status, indicating current manufacturing support and long-term availability.

2. Electrical Compatibility: Both parts operate at identical forward voltage (3.1V) and test current (150mA), with matching maximum current ratings (160mA). Circuit designs require no modification.

3. Optical Specifications: Color temperature (5700K), CRI (90), and viewing angle (120°) are identical. Luminous flux differs within acceptable tolerance: main part 59 lm versus substitute 56 lm at 150mA test current. This 5% variation falls within standard LED manufacturing tolerances and does not require design changes for typical lighting applications.

4. Mechanical Compatibility: Package type (1113/2835 metric), mounting method (surface mount), and physical dimensions are identical. PCB footprints and reflow profiles require no modification.

5. Compliance: Both parts are RoHS Compliant with identical MSL rating (2A, 4 Weeks). No additional handling or storage procedures are required.

6. Thermal Consideration: The substitute part exhibits higher thermal resistance (25°C/W versus 17°C/W). In applications with thermal constraints, verify that junction temperature remains within acceptable limits under maximum operating current and ambient conditions.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAQMSC be used as a direct replacement for SPMWH1228FD7WAQMS3 without PCB modification?

A: Yes. Both parts share identical package type (1113/2835 metric), mounting method (surface mount), and physical dimensions (3.50mm × 2.80mm × 0.75mm max height). No PCB layout changes are required.

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

A: LM281B+ is the active production variant of the LM281B series. The main part (LM281B) is marked Not For New Designs, while the substitute (LM281B+) carries Active status. Both series share identical electrical operating points (3.1V, 150mA) and optical specifications (5700K, 90 CRI, 120° viewing angle).

Q: Is the 3 lumen difference between the main part (59 lm) and substitute (56 lm) significant?

A: The flux difference of approximately 5% falls within standard LED manufacturing tolerances. Both parts are specified with flux ranges: main part 57–60 lm, substitute 54–57 lm. For applications requiring specific minimum flux, verify the substitute part's measured flux value against design requirements.

Q: Does the higher thermal resistance of the substitute part (25°C/W vs. 17°C/W) affect circuit design?

A: Thermal resistance affects junction temperature rise above ambient. In applications operating at maximum current (160mA) with elevated ambient temperature, calculate junction temperature using: Tj = Ta + (Pd × Rθ). If thermal margin is critical, verify that the substitute part's higher thermal resistance does not cause junction temperature to exceed maximum rated limits.

Q: Are storage and handling procedures identical for both parts?

A: Yes. Both parts carry identical MSL rating (2A, 4 Weeks). Storage, handling, and reflow procedures specified for SPMWH1228FD7WAQMS3 apply directly to SPMWH1228FD7WAQMSC.

Q: What is the base product number relationship?

A: Both SPMWH1228FD7WAQMS3 and SPMWH1228FD7WAQMSC share the same base product number (SPMWH1228). The suffix designations indicate series variant (LM281B vs. LM281B+) and product status (Not For New Designs vs. Active).

Q: Can the substitute part be used in existing production inventory of the main part?

A: Yes, provided that the 3 lumen flux difference and higher thermal resistance are acceptable for the application. Verify electrical and optical performance against design specifications before implementation.