SPMWH1228FD7WARMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WARMS4 is a Samsung Semiconductor LM281B series cool white LED in 2835 metric package (1113 case). This surface mount LED operates at 5000K color temperature with 3.1V forward voltage and 150mA test current, delivering 63 lumens at 25°C. The part is designated as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent substitute parts is necessary for ongoing production support, maintenance applications, and component replacement in existing designs.

Substiute Parts

SPMWH1228FD7WARMS4

Samsung Semiconductor, Inc.In Stock: 905SPMWH1228FD7WARMS4 Datasheet

Current PartRFQ

SPMWH1228FD7WARMSE

Samsung Semiconductor, Inc.In Stock: 920SPMWH1228FD7WARMSE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH1228FD7WARMS4 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Color and CCT: White, Cool 5000K
• Forward Voltage (Vf): 3.1V (typical)
• Test Current: 150mA
• Maximum Current: 160mA
• Viewing Angle: 120°
• Package / Case: 1113 (2835 Metric)
• Mounting Type: Surface Mount
• CRI: 90

Allowable Variation Parameters:

• Flux @ 25°C: Acceptable range 61–65 lm (specification tolerance)
• Lumens/Watt: Acceptable range based on flux tolerance
• Thermal Resistance: Acceptable variation within package design limits
• Series designation: LM281B or LM281B+ (same base product family)

The substitute part SPMWH1228FD7WARMSE meets all mandatory matching criteria and operates within allowable variation ranges for flux and efficiency metrics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SPMWH1228FD7WARMSE

The SPMWH1228FD7WARMSE is the direct substitute for SPMWH1228FD7WARMS4. Selection rationale:

1. Electrical Compatibility: Identical forward voltage (3.1V), test current (150mA), and maximum current (160mA) ensure direct circuit compatibility without modification to drive electronics or current-limiting resistors.

2. Optical Compatibility: Both parts deliver 5000K cool white light with 90 CRI. The substitute's flux output (59 lm at 25°C) falls within the specification tolerance range (57–61 lm) and represents acceptable variation within the LM281B product family. The 8 lm difference from the main part (63 lm) is within normal manufacturing tolerance and does not constitute a functional incompatibility.

3. Mechanical Compatibility: Identical package dimensions (1113 / 2835 metric), footprint (3.50mm × 2.80mm), and height (0.75mm maximum) ensure direct PCB placement without layout modification.

4. Compliance Status: Both parts are RoHS Compliant with identical MSL rating (2A, 4 Weeks), ensuring equivalent handling and storage requirements.

5. Product Status Advantage: The substitute part carries Active product status, providing long-term availability and supply continuity compared to the main part's "Not For New Designs" designation.

6. Thermal Performance: The substitute's thermal resistance (25°C/W) is higher than the main part (17°C/W) but remains within acceptable design margins for 2835 package class LEDs operating at 150mA test current.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WARMSE be used as a direct replacement for SPMWH1228FD7WARMS4 without circuit modification?

A: Yes. Both parts share identical electrical specifications (3.1V forward voltage, 150mA test current, 160mA maximum current) and mechanical dimensions (1113 / 2835 package, 3.50mm × 2.80mm footprint). No circuit redesign or component value changes are required.

Q: What is the difference in light output between these two parts?

A: The main part delivers 63 lumens at 25°C and 150mA test current. The substitute delivers 59 lumens under identical conditions. This 4-lumen difference (6.3% variation) falls within the specification tolerance range for both parts and is typical of manufacturing variation within the LM281B product family. Both parts maintain 5000K color temperature and 90 CRI.

Q: Are the thermal characteristics equivalent?

A: The main part has thermal resistance of 17°C/W; the substitute has 25°C/W. The substitute's higher thermal resistance is within acceptable design margins for 2835 package LEDs at 150mA operation. Thermal performance differences are negligible in typical application environments with standard PCB thermal management.

Q: Why is the main part marked "Not For New Designs"?

A: This designation indicates the SPMWH1228FD7WARMS4 has reached end-of-life status. The SPMWH1228FD7WARMSE, marked as Active, is the recommended part for ongoing production and new applications within the same product family.

Q: Are packaging and moisture sensitivity requirements the same?

A: Yes. Both parts use Tape & Reel (TR) packaging and carry MSL rating 2A (4 Weeks), requiring identical storage and handling procedures.

Q: Can these parts be mixed in the same production batch?

A: Yes. Identical electrical, optical, and mechanical specifications allow both parts to function interchangeably in the same circuit and PCB assembly without performance degradation or compatibility issues.

Q: What compliance certifications apply to both parts?

A: Both parts are RoHS Compliant and carry ECCN EAR99 and HTSUS 8541.41.0000 classifications, ensuring equivalent regulatory and export compliance status.