SPMWH1228FD5WATMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WATMS3 is a Samsung Semiconductor LM281B series surface-mount LED in 2835 metric package (1113 case code), emitting neutral white light at 4000K color temperature. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. Alternative equivalent parts are available to support ongoing production requirements and design continuity for existing applications utilizing this LED specification.

Substiute Parts

SPMWH1228FD5WATMS3

Samsung Semiconductor, Inc.In Stock: 37091SPMWH1228FD5WATMS3 Datasheet

Current PartRFQ

SPMWH1228FD5WATMSC

Samsung Semiconductor, Inc.In Stock: 1097SPMWH1228FD5WATMSC Datasheet

DirectRFQ

SPMWH1228FD5WAT0S3

Samsung Semiconductor, Inc.In Stock: 18353SPMWH1228FD5WAT0S3 Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAT0SE

Samsung Semiconductor, Inc.In Stock: 775SPMWH3228FD5WAT0SE Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATKSE

Samsung Semiconductor, Inc.In Stock: 1008SPMWH3228FD5WATKSE Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WATMSE

Samsung Semiconductor, Inc.In Stock: 857SPMWH3228FD5WATMSE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH1228FD5WATMS3 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Color: White, Neutral (4000K CCT)
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• Viewing Angle: 120°
• Test Current: 150mA
• Maximum Current: 160mA
• CRI: 80
• Physical Dimensions: 3.50 × 2.80 mm footprint, 0.75 mm max height
• Thermal Resistance: 25°C/W

Acceptable Parameter Variance:

• Luminous Flux @ 25°C: 61–65 lm range (nominal 63 lm)
• Forward Voltage (Vf): 3.0–3.1 V
• Luminous Efficacy: 135–140 lm/W
• Series designation: LM281B, LM281B+, or LM281BZ+
• RoHS Compliance: ROHS3 or RoHS Compliant
• Product Status: Active or Not For New Designs

Substitute parts must maintain identical mechanical compatibility, electrical operating parameters within specified tolerances, and optical characteristics to ensure direct replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

SPMWH1228FD5WATMSC and SPMWH1228FD5WAT0S3 are direct parametric equivalents to SPMWH1228FD5WATMS3. Both maintain identical package geometry, electrical operating range, and optical output within specified tolerances. SPMWH1228FD5WATMSC carries Active product status, making it the preferred choice for ongoing production. SPMWH1228FD5WAT0S3 shares Not For New Designs status with the main part but provides equivalent performance.

Alternative Series Substitutes (LM281BZ+ Series):

SPMWH3228FD5WAT0SE, SPMWH3228FD5WATKSE, and SPMWH3228FD5WATMSE represent the LM281BZ+ series evolution. These parts deliver improved luminous efficacy (140 lm/W versus 135 lm/W) and operate at reduced forward voltage (3.0 V versus 3.1 V). All three maintain identical package dimensions, thermal characteristics, and optical specifications. All three carry Active product status. The 0.1 V forward voltage reduction may require minor circuit adjustment in current-limiting designs but does not affect direct mechanical or thermal compatibility.

Compliance Considerations:

All substitute parts maintain RoHS compliance and identical MSL ratings. Selection between ROHS3 Compliant and RoHS Compliant designations depends on specific procurement requirements; both satisfy standard environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WATMSC directly replace SPMWH1228FD5WATMS3 without circuit modification?

A: Yes. Both parts share identical forward voltage (3.1 V), test current (150 mA), maximum current (160 mA), and luminous flux specifications (63 lm nominal). No circuit redesign is required for direct substitution.

Q: What is the difference between SPMWH1228FD5WATMSC and the LM281BZ+ alternatives?

A: SPMWH1228FD5WATMSC belongs to the LM281B+ series and maintains 3.1 V forward voltage. The LM281BZ+ alternatives (SPMWH3228 base number) operate at 3.0 V and deliver higher luminous efficacy (140 lm/W). Both are mechanically and thermally compatible but require forward voltage adjustment in current-limiting circuits.

Q: Are the LM281BZ+ parts (SPMWH3228 series) mechanically compatible with the original design?

A: Yes. All substitute parts maintain identical 2835 metric package dimensions (3.50 × 2.80 × 0.75 mm), thermal resistance (25°C/W), and surface-mount characteristics. PCB footprints and thermal management designs require no modification.

Q: Why is SPMWH1228FD5WATMS3 marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life in Samsung's product roadmap. SPMWH1228FD5WATMSC (Active status) is the recommended alternative for new production. Existing designs using SPMWH1228FD5WATMS3 can transition to SPMWH1228FD5WATMSC without technical changes.

Q: Does the 0.1 V forward voltage difference between LM281B and LM281BZ+ series affect brightness?

A: No. Luminous flux output is determined by test current (150 mA) and LED efficiency, both of which are equivalent across all substitute parts. Forward voltage difference affects only circuit power dissipation and current-limiting resistor values in constant-current designs.

Q: What is the inventory status of substitute parts?

A: SPMWH1228FD5WATMSC: 1,004 pcs. SPMWH1228FD5WAT0S3: 18,310 pcs. SPMWH3228FD5WAT0SE: 760 pcs. SPMWH3228FD5WATKSE: 919 pcs. SPMWH3228FD5WATMSE: 808 pcs. Availability should be confirmed with supplier for production quantities.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitutes meet RoHS environmental standards. SPMWH1228FD5WATMSC, SPMWH1228FD5WAT0S3, and all LM281BZ+ variants carry RoHS Compliant or ROHS3 Compliant designations.