SPMWH1228FD7WAUMS4 Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAUMS4 is a Samsung Semiconductor LM281B series warm white LED in 2835 metric package (1113 case). This surface mount LED operates at 3500K color temperature with 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for design continuity, inventory management, and component sourcing in applications where this LED is currently deployed.

Substiute Parts

SPMWH1228FD7WAUMS4

Samsung Semiconductor, Inc.In Stock: 4204SPMWH1228FD7WAUMS4 Datasheet

Current PartRFQ

SPMWH1228FD7WAUMSE

Samsung Semiconductor, Inc.In Stock: 966SPMWH1228FD7WAUMSE Datasheet

DirectRFQ

SPMWH1228FD7WAU0S4

Samsung Semiconductor, Inc.In Stock: 39773SPMWH1228FD7WAU0S4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WAUMS4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Color: White, Warm (3500K CCT)
• Package: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• Forward Voltage (Vf): 3.1V
• Test Current: 150mA
• Maximum Current: 160mA
• Viewing Angle: 120°
• CRI: 90
• RoHS Compliance: Yes
• MSL: 2A (4 Weeks)

Identified Substitutes:

1. SPMWH1228FD7WAU0S4 — Parametric Equivalent. Identical electrical and mechanical specifications to the main part. Same LM281B series, same thermal resistance (17°C/W), same flux output (59lm at 25°C, 150mA). Differs only in packaging code suffix. Higher inventory availability (39,675 pcs vs. 4,191 pcs).

2. SPMWH1228FD7WAUMSE — Direct Manufacturer Substitute. LM281B+ series variant. Maintains identical package, color temperature, voltage, current ratings, and viewing angle. Differs in thermal resistance (25°C/W vs. 17°C/W) and flux output (57lm vs. 59lm at 25°C, 150mA). Product status is Active, indicating ongoing availability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalence):

SPMWH1228FD7WAU0S4 is the primary equivalent. It maintains identical electrical performance (127 lm/W, 59lm flux, 3.1V Vf, 150mA test current) and thermal characteristics (17°C/W). The only difference is the packaging code suffix, which reflects internal Samsung manufacturing or distribution tracking. This part is suitable for applications requiring exact performance matching. Higher inventory (39,675 pcs) provides supply continuity.

For Active Product Sourcing:

SPMWH1228FD7WAUMSE is the only substitute with Active product status. It is based on the LM281B+ series and maintains compatibility across all critical mechanical and electrical parameters: same package (2835), same color temperature (3500K), same voltage (3.1V), same current ratings (150mA test, 160mA max), same viewing angle (120°), and same CRI (90).

The performance differences are quantifiable:

• Flux output: 57lm vs. 59lm (3.4% lower)
• Lumens/Watt: 123 lm/W vs. 127 lm/W (3.1% lower)
• Thermal Resistance: 25°C/W vs. 17°C/W (higher thermal impedance)

These differences are within typical LED manufacturing tolerances and do not affect package compatibility or circuit-level integration. The higher thermal resistance may require thermal management review in applications with strict junction temperature constraints.

Compliance Considerations:

All three parts are RoHS Compliant and carry MSL 2A (4 Weeks) rating. Both the main part and SPMWH1228FD7WAU0S4 are marked "Not For New Designs," indicating Samsung has transitioned these to end-of-life. SPMWH1228FD7WAUMSE, with Active status, is the recommended choice for new production designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAU0S4 be used as a direct drop-in replacement for SPMWH1228FD7WAUMS4?

A: Yes. SPMWH1228FD7WAU0S4 is a parametric equivalent with identical electrical specifications (127 lm/W, 59lm flux, 3.1V, 150mA), thermal resistance (17°C/W), and mechanical dimensions (3.50mm × 2.80mm, 0.75mm height). The packaging code suffix difference does not affect performance or compatibility. Both are LM281B series parts with identical CRI (90) and viewing angle (120°).

Q: What are the performance trade-offs when substituting SPMWH1228FD7WAUMSE?

A: SPMWH1228FD7WAUMSE (LM281B+) delivers 3.4% lower flux (57lm vs. 59lm) and 3.1% lower efficiency (123 lm/W vs. 127 lm/W) at the same 150mA test current. Thermal resistance increases from 17°C/W to 25°C/W. All other parameters—package, color temperature (3500K), voltage (3.1V), current ratings (150mA/160mA), viewing angle (120°), and CRI (90)—remain identical. The flux and efficiency differences fall within standard LED manufacturing tolerances.

Q: Are all three parts mechanically compatible with the same PCB footprint?

A: Yes. All three parts use the 1113 (2835 Metric) package with identical dimensions: 3.50mm length × 2.80mm width and 0.75mm maximum seated height. They are surface mount components with identical mechanical compatibility.

Q: Which part should be selected for new product designs?

A: SPMWH1228FD7WAUMSE is the recommended choice. It carries Active product status, indicating Samsung's ongoing support and availability. The main part (SPMWH1228FD7WAUMS4) and SPMWH1228FD7WAU0S4 are both marked "Not For New Designs," signaling end-of-life transition. While SPMWH1228FD7WAUMSE has slightly higher thermal resistance and lower efficiency, these differences are manageable in most applications and are offset by long-term supply assurance.

Q: What is the significance of the packaging code suffix differences (WAUMS4 vs. WAU0S4 vs. WAUMSE)?

A: The suffix variations reflect Samsung's internal part numbering for manufacturing, distribution, or quality tracking purposes. They do not indicate functional or performance differences. SPMWH1228FD7WAUMS4 and SPMWH1228FD7WAU0S4 are electrically and mechanically identical LM281B parts. SPMWH1228FD7WAUMSE uses the LM281B+ variant, which is a distinct series with documented performance differences (flux, efficiency, thermal resistance).

Q: Are moisture sensitivity and RoHS compliance identical across all three parts?

A: Yes. All three parts are RoHS Compliant and carry MSL 2A (4 Weeks) rating. Handling, storage, and reflow requirements are identical.

Q: Can thermal resistance differences affect circuit design?

A: The 8°C/W difference between SPMWH1228FD7WAUMS4/WAU0S4 (17°C/W) and SPMWH1228FD7WAUMSE (25°C/W) may impact junction temperature in high-current or thermally constrained applications. For standard applications operating at or below 150mA with adequate PCB thermal dissipation, this difference is typically negligible. Applications with strict Tj (junction temperature) limits should calculate thermal performance using the specific thermal resistance value.