SPMWH1228FD7WARMS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WARMS2 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 56 lumens at 25°C. The part is marked as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and new design initiatives.

Substiute Parts

SPMWH1228FD7WARMS2

Samsung Semiconductor, Inc.In Stock: 944SPMWH1228FD7WARMS2 Datasheet

Current PartRFQ

SPMWH1228FD7WARMSA

Samsung Semiconductor, Inc.In Stock: 1210SPMWH1228FD7WARMSA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPMWH1228FD7WARMS2 is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Color specification: White, Cool 5000K
• Package type: 1113 (2835 Metric) surface mount
• Forward voltage: 3.1V nominal
• Test current: 150mA
• Maximum current rating: 160mA
• Viewing angle: 120°
• CRI: 90
• RoHS compliance and MSL classification

Substitution Basis: The SPMWH1228FD7WARMSA qualifies as a direct substitute because it maintains identical electrical operating parameters (3.1V, 150mA test current, 160mA max), identical package geometry (2835 metric, 3.50mm × 2.80mm, 0.75mm height), identical color specification (5000K cool white), identical viewing angle (120°), and identical compliance certifications (RoHS, MSL 2A). Both parts share the same base product number (SPMWH1228) and are manufactured by Samsung Semiconductor, Inc.

Parameter Comparison

Engineering Selection Recommendations

For Existing Designs Using SPMWH1228FD7WARMS2:

The SPMWH1228FD7WARMSA is a direct functional substitute. Both parts operate at identical electrical parameters (3.1V, 150mA), share identical package geometry (2835 metric), and maintain identical compliance certifications (RoHS Compliant, MSL 2A). The substitute part is currently in Active product status, whereas the main part is marked Not For New Designs.

Thermal Consideration:

The substitute part (SPMWH1228FD7WARMSA) has a thermal resistance of 25°C/W compared to 17°C/W for the main part. In thermal-sensitive applications, this difference must be evaluated against circuit design and thermal management provisions.

Luminous Flux Variance:

The substitute delivers 52 lumens at 25°C (50–54 lm range) versus 56 lumens for the main part (54–58 lm range). This represents approximately 7% lower flux output. Applications with strict luminous intensity requirements must account for this difference in circuit design or optical system compensation.

Compliance and Availability:

Both parts maintain identical RoHS compliance and MSL classification. The substitute part has higher current inventory availability (1138 Pcs vs. 862 Pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WARMSA be used as a direct drop-in replacement for SPMWH1228FD7WARMS2?

A: Yes, for applications where the 7% reduction in luminous flux (52 lm vs. 56 lm) and increased thermal resistance (25°C/W vs. 17°C/W) are acceptable. Both parts share identical package geometry (2835 metric, 3.50mm × 2.80mm), forward voltage (3.1V), test current (150mA), and maximum current rating (160mA). PCB footprints and solder reflow profiles are identical.

Q: What is the difference between LM281B and LM281B+ series?

A: The LM281B+ is an enhanced variant of the LM281B series. In this substitution case, both series maintain identical electrical operating parameters, color specification (5000K cool white), and package format (2835 metric). The primary difference is product status: LM281B is marked Not For New Designs, while LM281B+ is Active.

Q: Are there any circuit design changes required when switching from SPMWH1228FD7WARMS2 to SPMWH1228FD7WARMSA?

A: No circuit design changes are required. Both parts operate at identical forward voltage (3.1V) and test current (150mA). However, thermal management design should account for the substitute's higher thermal resistance (25°C/W vs. 17°C/W). Additionally, if luminous output is critical, the 7% flux reduction should be evaluated against application requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both SPMWH1228FD7WARMS2 and SPMWH1228FD7WARMSA are RoHS Compliant with identical MSL classification (2A, 4 Weeks).

Q: What is the viewing angle for both parts?

A: Both parts have a 120° viewing angle, ensuring identical light distribution characteristics in optical applications.

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

A: The SPMWH1228FD7WARMS2 carries a Not For New Designs status, indicating Samsung Semiconductor is transitioning this part to end-of-life. The SPMWH1228FD7WARMSA (LM281B+ series, Active status) is the recommended alternative for new design initiatives and ongoing production.