SPMWH1228FD5WARMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WARMS2 is a Samsung Semiconductor LM281B cool white LED in 2835 metric package (1113 case code) designed for surface mount applications. This component operates at 5000K color temperature with 150mA test current and 3.1V typical 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 production support of existing applications utilizing this LED series.

Substiute Parts

SPMWH1228FD5WARMS2

Samsung Semiconductor, Inc.In Stock: 1119SPMWH1228FD5WARMS2 Datasheet

Current PartRFQ

SPMWH1228FD5WAR0SA

Samsung Semiconductor, Inc.In Stock: 851SPMWH1228FD5WAR0SA Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WARKSA

Samsung Semiconductor, Inc.In Stock: 1169SPMWH1228FD5WARKSA Datasheet

Parametric EquivalentRFQ

SPMWH1228FD5WARMSA

Samsung Semiconductor, Inc.In Stock: 802SPMWH1228FD5WARMSA Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WAR0SC

Samsung Semiconductor, Inc.In Stock: 1145SPMWH3228FD5WAR0SC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WARKSC

Samsung Semiconductor, Inc.In Stock: 929SPMWH3228FD5WARKSC Datasheet

Parametric EquivalentRFQ

SPMWH3228FD5WARMSC

Samsung Semiconductor, Inc.In Stock: 904SPMWH3228FD5WARMSC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD5WARMS2 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Color: White, Cool (5000K CCT)
• Flux @ 25°C, 150mA: 61lm (59–63lm range)
• Current - Test: 150mA
• Voltage - Forward (Vf) Typical: 3.1V or 3.0V (within operational tolerance)
• Current - Maximum: 160mA
• Viewing Angle: 120°
• Package / Case: 1113 (2835 Metric)
• Size / Dimension: 3.50mm × 2.80mm
• Height - Seated (Max): 0.75mm
• Thermal Resistance: 25°C/W
• Mounting Type: Surface Mount
• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level: 2A (4 Weeks)

Substitution Groups:

Group 1: LM281B+ Series (Active Status) Parts SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, and SPMWH1228FD5WARMSA are direct parametric equivalents. These parts share identical electrical and mechanical specifications with the main part, with the distinction that they represent the LM281B+ series iteration (active product status) rather than the original LM281B (not for new designs). All three parts maintain 3.1V forward voltage, 150mA test current, 61lm flux output, and identical package dimensions.

Group 2: LM281BZ+ Series (Active Status, Modified Forward Voltage) Parts SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, and SPMWH3228FD5WARMSC are parametric equivalents with a single electrical variance: forward voltage is 3.0V typical instead of 3.1V. All other parameters remain identical, including flux output (61lm), current ratings (150mA test, 160mA max), package dimensions, and thermal characteristics. The LM281BZ+ series represents an enhanced iteration with improved lumens/watt efficiency (136 lm/W versus 131 lm/W).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Characteristics): Select from Group 1 substitutes (SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, SPMWH1228FD5WARMSA). These LM281B+ parts maintain 3.1V forward voltage and 131 lm/W efficiency, providing drop-in compatibility with existing circuit designs. All three parts carry Active product status and RoHS compliance certification, ensuring long-term supply availability and regulatory conformance.

For Enhanced Efficiency (Modified Forward Voltage): Select from Group 2 substitutes (SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, SPMWH3228FD5WARMSC). These LM281BZ+ parts operate at 3.0V forward voltage with improved efficiency of 136 lm/W. Circuit designs must accommodate the 0.1V reduction in forward voltage. This substitution is suitable for applications where power efficiency optimization is a design objective and forward voltage tolerance exists in the power supply or current-limiting circuit.

Compliance and Supply Considerations: All substitute parts are RoHS Compliant with MSL 2A (4 Weeks) moisture sensitivity rating, matching the original part specification. All substitutes carry Active product status, ensuring continued manufacturing and supply chain availability. The original SPMWH1228FD5WARMS2 is designated "Not For New Designs," making substitution necessary for ongoing production support.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, and SPMWH1228FD5WARMSA be used interchangeably with SPMWH1228FD5WARMS2?

A: Yes. These three LM281B+ parts are parametric equivalents with identical electrical and mechanical specifications. Forward voltage (3.1V), flux output (61lm), current ratings, package dimensions (3.50mm × 2.80mm), and thermal characteristics are identical. The primary difference is product status: the substitutes are Active, while the original is Not For New Designs.

Q: What is the difference between Group 1 (LM281B+) and Group 2 (LM281BZ+) substitutes?

A: The primary difference is forward voltage: Group 1 operates at 3.1V (matching the original part), while Group 2 operates at 3.0V. Group 2 also provides improved efficiency (136 lm/W versus 131 lm/W). Flux output, current ratings, and package dimensions remain identical. Group 2 substitution requires circuit design verification to confirm forward voltage tolerance.

Q: Are all substitute parts RoHS Compliant?

A: Yes. All substitute parts listed carry RoHS Compliant certification, matching the original SPMWH1228FD5WARMS2 specification.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the original and all substitutes, carry MSL 2A (4 Weeks) rating. This indicates the parts must be stored in controlled humidity conditions and used within 4 weeks of package opening under standard moisture conditions.

Q: Can I use SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, or SPMWH3228FD5WARMSC as direct replacements without circuit modification?

A: These parts can be used only if the circuit design accommodates a 0.1V reduction in forward voltage (3.0V instead of 3.1V). Verify that the power supply, current-limiting resistor, or LED driver circuit can operate within this modified voltage specification. If forward voltage tolerance is not confirmed, use Group 1 substitutes instead.

Q: Why are there three different part numbers within each group (Group 1 and Group 2)?

A: The three part numbers within each group represent different packaging or distribution variants from Samsung Semiconductor. All three maintain identical electrical and mechanical specifications. Selection among the three can be based on inventory availability or supplier preference.

Q: Is the 1113 (2835 Metric) package compatible with standard 2835 footprints?

A: Yes. The 1113 case code and 2835 metric designation refer to the same physical package. Dimensions are 3.50mm length × 2.80mm width × 0.75mm maximum seated height. This package is compatible with standard 2835 LED footprints in PCB designs.