SPMWH3228FD5WARMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH3228FD5WARMS4 is a Samsung Semiconductor LM281BZ cool white LED in 2835 metric package (1113 case). This part is classified as Not For New Designs, making substitute parts necessary for ongoing production and new design implementations. The LM281BZ series delivers 69 lumens at 25°C with 5000K color temperature and 80 CRI, suitable for general illumination applications requiring cool white output.

Key Parameters

Parameter	Value
Manufacturer Part Number	SPMWH3228FD5WARMS4
Manufacturer	Samsung Semiconductor, Inc.
Series	LM281BZ
Color / CCT	White, Cool / 5000K
Flux @ 25°C, 150mA	69 lm (67–71 lm range)
Forward Voltage (Typ)	3.1V
Test Current	150 mA
Maximum Current	160 mA
Lumens/Watt @ 150mA	148 lm/W
CRI	80
Viewing Angle	120°
Package / Case	1113 (2835 Metric)
Mounting Type	Surface Mount
Size	3.50 mm L × 2.80 mm W
Height (Max)	0.75 mm
Thermal Resistance	25°C/W
RoHS Status	RoHS Compliant
MSL Rating	2A (4 Weeks)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical, optical, and mechanical specifications. All substitute parts maintain identical values for the following critical parameters:

Color and CCT: White, Cool 5000K
Flux output: 69 lm at 25°C, 150 mA test current (67–71 lm range)
Forward voltage: 3.1V or 3.0V (within acceptable operating range)
Test current: 150 mA
Maximum current: 160 mA
CRI: 80
Viewing angle: 120°
Package: 1113 (2835 Metric)
Mounting: Surface Mount
Physical dimensions: 3.50 mm × 2.80 mm, 0.75 mm height
Thermal resistance: 25°C/W
RoHS compliance: RoHS Compliant
MSL rating: 2A (4 Weeks)

Substitute parts are grouped into two categories based on series designation and product status:

Category A – LM281B Series (Not For New Designs): SPMWH1228FD5WAR0S4, SPMWH1228FD5WARMS4

Category B – LM281B+ Series (Active Status): SPMWH1228FD5WAR0SE, SPMWH1228FD5WARKSE, SPMWH1228FD5WARMSE, SPMWH1228FD5WARUSE

Category C – LM281BZ+ Series (Active Status): SPMWH3228FD5WAR0SG, SPMWH3228FD5WARKSG, SPMWH3228FD5WARMSG

Parameter Comparison

Part Number	Series	Vf (Typ)	Flux @ 25°C	lm/W	Product Status	Inventory
SPMWH3228FD5WARMS4	LM281BZ	3.1V	69 lm	148	Not For New Designs	875 Pcs
SPMWH1228FD5WAR0S4	LM281B	3.1V	69 lm	148	Not For New Designs	36,790 Pcs
SPMWH1228FD5WARMS4	LM281B	3.1V	69 lm	148	Not For New Designs	35,193 Pcs
SPMWH1228FD5WAR0SE	LM281B+	3.1V	69 lm	148	Active	1,029 Pcs
SPMWH1228FD5WARKSE	LM281B+	3.1V	69 lm	148	Active	1,000,100 Pcs
SPMWH1228FD5WARMSE	LM281B+	3.1V	69 lm	148	Active	827 Pcs
SPMWH1228FD5WARUSE	LM281B+	3.0V	69 lm	153	Active	620 Pcs
SPMWH3228FD5WAR0SG	LM281BZ+	3.0V	69 lm	153	Active	710 Pcs
SPMWH3228FD5WARKSG	LM281BZ+	3.0V	69 lm	153	Active	996 Pcs
SPMWH3228FD5WARMSG	LM281BZ+	3.0V	69 lm	153	Active	1,010 Pcs

Engineering Selection Recommendations

For applications currently using SPMWH3228FD5WARMS4, substitute selection depends on product lifecycle requirements and compliance status.

For ongoing production of existing designs: LM281B series parts (SPMWH1228FD5WAR0S4, SPMWH1228FD5WARMS4) provide direct electrical and optical equivalence while maintaining the same Not For New Designs status. These parts carry identical specifications and RoHS compliance.

For new design implementations: LM281B+ series (SPMWH1228FD5WAR0SE, SPMWH1228FD5WARKSE, SPMWH1228FD5WARMSE) or LM281BZ+ series (SPMWH3228FD5WAR0SG, SPMWH3228FD5WARKSG, SPMWH3228FD5WARMSG) are recommended. These parts carry Active product status and maintain full RoHS compliance with MSL 2A rating. The LM281B+ variants with 3.1V forward voltage (SPMWH1228FD5WAR0SE, SPMWH1228FD5WARKSE, SPMWH1228FD5WARMSE) provide exact electrical equivalence. The 3.0V variants (SPMWH1228FD5WARUSE, SPMWH3228FD5WAR0SG, SPMWH3228FD5WARKSG, SPMWH3228FD5WARMSG) deliver improved efficiency at 153 lm/W while maintaining identical optical output and mechanical compatibility.

All substitute parts are RoHS Compliant with MSL 2A (4 Weeks) rating, ensuring compatibility with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WARKSE replace SPMWH3228FD5WARMS4 directly?

A: Yes. Both parts deliver 69 lumens at 5000K with 3.1V forward voltage, 150 mA test current, 120° viewing angle, and identical 2835 metric package dimensions. The primary difference is series designation (LM281B+ vs. LM281BZ) and product status (Active vs. Not For New Designs). Electrical and optical performance are equivalent.

Q: What is the difference between 3.1V and 3.0V forward voltage variants?

A: Both voltage ratings operate within acceptable parameters for this LED category. The 3.0V variants (SPMWH1228FD5WARUSE, SPMWH3228FD5WAR0SG, SPMWH3228FD5WARKSG, SPMWH3228FD5WARMSG) achieve higher efficiency at 153 lm/W compared to 148 lm/W for 3.1V parts, while maintaining identical 69 lumen output. Circuit design must accommodate the voltage difference in current-limiting driver design.

Q: Are all substitute parts in the same 2835 package?

A: Yes. All listed substitute parts use the 1113 (2835 Metric) package with identical dimensions of 3.50 mm length × 2.80 mm width and 0.75 mm maximum height. Surface mount compatibility is maintained across all substitutes.

Q: Which substitute has the highest inventory availability?

A: SPMWH1228FD5WARKSE (LM281B+ series) carries 1,000,100 pieces in stock, providing maximum supply continuity for production requirements.

Q: Are all substitutes RoHS Compliant?

A: Yes. All listed substitute parts carry RoHS Compliant status with MSL 2A (4 Weeks) rating, meeting standard environmental and moisture sensitivity requirements for surface mount assembly.

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