SPMWH1228FD5WAQMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAQMS4 is a Samsung Semiconductor LM281B series cool white LED in 2835 metric package (1113 case). This surface mount LED operates at 5700K color temperature with 68 lumens at 25°C and 150mA test current. The part is classified as "Not For New Designs," indicating end-of-life status. Equivalent and substitute parts are necessary for ongoing production support, inventory replenishment, and design continuity where this LED specification remains applicable.

Substiute Parts

SPMWH1228FD5WAQMS4

Samsung Semiconductor, Inc.In Stock: 817SPMWH1228FD5WAQMS4 Datasheet

Current PartRFQ

SPMWH1228FD5WAQMSE

Samsung Semiconductor, Inc.In Stock: 881SPMWH1228FD5WAQMSE Datasheet

DirectRFQ

SPMWH3228FD5WAQ0SG

Samsung Semiconductor, Inc.In Stock: 806SPMWH3228FD5WAQ0SG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAQKSG

Samsung Semiconductor, Inc.In Stock: 665SPMWH3228FD5WAQKSG Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAQMSG

Samsung Semiconductor, Inc.In Stock: 787SPMWH3228FD5WAQMSG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WAQMS4 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Color: White, Cool
• CCT: 5700K
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• CRI: 80
• Viewing Angle: 120°
• Thermal Resistance: 25°C/W
• Size / Dimension: 3.50 × 2.80 mm
• Height - Seated (Max): 0.75 mm

Allowable Variation Parameters:

• Flux @ 25°C, 150mA: 66–71 lm range
• Forward Voltage (Vf): 3.0–3.1 V
• Lumens/Watt: 146–151 lm/W
• Maximum Current: 160 mA (fixed)
• Test Current: 150 mA (fixed)

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes: Parts from the same base product family (SPMWH1228) with identical electrical performance and packaging, differing only in series designation (LM281B vs. LM281B+) and product status.

Parametric Equivalents: Parts from the SPMWH3228 base product family with LM281BZ+ series designation, maintaining identical optical and thermal characteristics while operating at 3.0V forward voltage instead of 3.1V.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Substitute: SPMWH1228FD5WAQMSE

The SPMWH1228FD5WAQMSE is the primary direct substitute for SPMWH1228FD5WAQMS4. Both parts share identical electrical specifications, package geometry, and thermal characteristics. The substitute operates at Active product status, ensuring continued availability and manufacturing support. The LM281B+ series designation indicates an improved version within the same product family. Flux output at 25°C is 69 lm (67–71 lm range) compared to 68 lm (66–70 lm range) for the main part, representing a marginal improvement within acceptable tolerance. Lumens/Watt efficiency increases from 146 to 148 lm/W. All compliance certifications (RoHS, MSL 2A) are identical.

Parametric Equivalents: SPMWH3228 Series (LM281BZ+)

The three SPMWH3228 variants (SPMWH3228FD5WAQ0SG, SPMWH3228FD5WAQKSG, SPMWH3228FD5WAQMSG) are parametric equivalents suitable for applications where forward voltage reduction is acceptable. These parts operate at 3.0V instead of 3.1V, reducing power dissipation by approximately 3.2% at 150mA test current. Flux output remains at 68 lm (66–70 lm range), identical to the main part. Lumens/Watt efficiency improves to 151 lm/W. All parts maintain Active product status, RoHS compliance, and identical package dimensions and thermal characteristics. The lower forward voltage makes these parts suitable for battery-powered or low-voltage supply applications where the 0.1V reduction provides measurable system-level benefits.

All substitute parts maintain identical CRI (80), viewing angle (120°), and moisture sensitivity level (2A, 4 Weeks), ensuring direct compatibility in existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAQMSE be used as a direct replacement for SPMWH1228FD5WAQMS4?

A: Yes. SPMWH1228FD5WAQMSE is a direct manufacturer substitute with identical electrical performance, package geometry, and thermal characteristics. The only differences are series designation (LM281B+ vs. LM281B) and product status (Active vs. Not For New Designs). Flux output and forward voltage fall within the same specification ranges.

Q: What is the difference between direct substitutes and parametric equivalents?

A: Direct substitutes (SPMWH1228FD5WAQMSE) maintain identical forward voltage (3.1V) and belong to the same base product family (SPMWH1228). Parametric equivalents (SPMWH3228 series) operate at 3.0V forward voltage and belong to a different base product family (SPMWH3228), but deliver identical optical output (68 lm at 150mA) and thermal performance. Parametric equivalents are suitable when lower forward voltage provides system-level advantages.

Q: Are the SPMWH3228 parts compatible with existing PCB layouts designed for SPMWH1228?

A: Yes. All substitute parts maintain identical package dimensions (3.50 × 2.80 mm), height (0.75 mm maximum), and thermal resistance (25°C/W). PCB footprints and thermal management designs require no modification. The 0.1V forward voltage difference does not affect mechanical compatibility.

Q: What is the flux tolerance range for these LEDs?

A: The main part SPMWH1228FD5WAQMS4 specifies 68 lm at 25°C with a tolerance range of 66–70 lm. The direct substitute SPMWH1228FD5WAQMSE specifies 69 lm with a tolerance range of 67–71 lm. The parametric equivalents specify 68 lm with a tolerance range of 66–70 lm. All parts operate at 150mA test current.

Q: Do all substitute parts maintain RoHS compliance?

A: Yes. All listed substitute parts are RoHS Compliant with identical MSL rating (2A, 4 Weeks). No changes to handling, storage, or assembly procedures are required.

Q: Which substitute should be selected for battery-powered applications?

A: The SPMWH3228 series parametric equivalents (SPMWH3228FD5WAQ0SG, SPMWH3228FD5WAQKSG, SPMWH3228FD5WAQMSG) are recommended for battery-powered applications. Operating at 3.0V instead of 3.1V reduces power dissipation and extends battery runtime while maintaining identical 68 lm optical output at 150mA.

Q: Are there inventory differences between substitute parts?

A: Yes. Current inventory levels are: SPMWH1228FD5WAQMS4 (801 pcs), SPMWH1228FD5WAQMSE (850 pcs), SPMWH3228FD5WAQ0SG (696 pcs), SPMWH3228FD5WAQKSG (626 pcs), SPMWH3228FD5WAQMSG (696 pcs). Availability should be confirmed at time of procurement.

Q: What is the significance of "Not For New Designs" status on the main part?

A: This designation indicates the SPMWH1228FD5WAQMS4 is end-of-life. New designs should specify the Active substitute SPMWH1228FD5WAQMSE or parametric equivalents from the SPMWH3228 series. Existing designs may continue using the main part while inventory is available, with substitutes available for ongoing production support.