SPMWH1228FD7WAPMS4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD7WAPMS4 is a Samsung Semiconductor LM281B cool white LED in 2835 metric package (1113 case code) rated for 6500K color temperature. This surface mount LED operates at 3.1V forward voltage with 150mA test current and delivers 61 lumens at 25°C. The part is classified as "Not For New Designs," indicating end-of-life status. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply availability, and support ongoing production requirements for applications utilizing this LED specification.

Key Parameters

Parameter	Value	Unit
Series	LM281B
Color	White, Cool
CCT (Correlated Color Temperature)	6500K	K
Flux @ 25°C, 150mA	61	lm
Forward Voltage (Vf) Typical	3.1	V
Test Current	150	mA
Maximum Current	160	mA
Lumens per Watt @ 150mA	131	lm/W
CRI (Color Rendering Index)	90
Viewing Angle	120	°
Package / Case	1113 (2835 Metric)
Mounting Type	Surface Mount
Size	3.50 x 2.80	mm
Height Seated (Max)	0.75	mm
Thermal Resistance	17	°C/W
RoHS Status	RoHS Compliant
MSL (Moisture Sensitivity Level)	2A (4 Weeks)

Substitute Part Grouping Explanation

Substitution of SPMWH1228FD7WAPMS4 is determined by the following critical parameters:

Primary Substitution Criteria:

Package / Case: 1113 (2835 Metric) — mechanical and thermal compatibility
Mounting Type: Surface Mount — assembly process compatibility
Forward Voltage (Vf): 3.0V to 3.1V — circuit design compatibility
Test Current: 150mA — operational current rating
Viewing Angle: 120° — optical performance
Color: White, Cool — visual output specification
Flux Output: 59–63 lm @ 25°C, 150mA — luminous intensity range

Substitution Categories:

Direct Manufacturer Equivalent (Same Series, Active Status): SPMWH1228FD7WAPMSE represents the LM281B+ series upgrade with identical electrical parameters (3.1V, 150mA, 120° viewing angle, 2835 package) but with reduced flux output (58 lm vs. 61 lm) and higher thermal resistance (25°C/W vs. 17°C/W). Product status is Active, supporting new designs.

Parametric Equivalents (LM281B+ Series, 5700K and 5000K CCT): Parts SPMWH1228FD5WAQ0SA, SPMWH1228FD5WAQKSA, SPMWH1228FD5WAQMSA, SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, and SPMWH1228FD5WARMSA maintain identical electrical specifications (3.1V, 150mA, 61 lm @ 25°C, 131 lm/W, 120° viewing angle, 2835 package) but differ in CCT (5700K or 5000K) and CRI (80 vs. 90). These parts are Active status and support applications where color temperature variation is acceptable.

Parametric Equivalents (LM281BZ+ Series, Lower Forward Voltage): Parts SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, and SPMWH3228FD5WARMSC represent the LM281BZ+ series with reduced forward voltage (3.0V vs. 3.1V), improved efficiency (136 lm/W vs. 131 lm/W), identical flux output (61 lm @ 25°C), and 2835 package compatibility. These parts are Active status and suitable for applications requiring lower voltage operation.

Parameter Comparison

Part Number	Series	Status	CCT (K)	Flux @ 25°C (lm)	Vf (V)	Test Current (mA)	lm/W	CRI	Viewing Angle (°)	Package	Thermal Resistance (°C/W)
SPMWH1228FD7WAPMS4	LM281B	Not For New Designs	6500	61	3.1	150	131	90	120	2835	17
SPMWH1228FD7WAPMSE	LM281B+	Active	6500	58	3.1	150	125	90	120	2835	25
SPMWH1228FD5WAQ0SA	LM281B+	Active	5700	61	3.1	150	131	80	120	2835	25
SPMWH1228FD5WAQKSA	LM281B+	Active	5700	61	3.1	150	131	80	120	2835	25
SPMWH1228FD5WAQMSA	LM281B+	Active	5700	61	3.1	150	131	80	120	2835	25
SPMWH1228FD5WAR0SA	LM281B+	Active	5000	61	3.1	150	131	80	120	2835	25
SPMWH1228FD5WARKSA	LM281B+	Active	5000	61	3.1	150	131	80	120	2835	25
SPMWH1228FD5WARMSA	LM281B+	Active	5000	61	3.1	150	131	80	120	2835	25
SPMWH3228FD5WAR0SC	LM281BZ+	Active	5000	61	3.0	150	136	80	120	2835	25
SPMWH3228FD5WARKSC	LM281BZ+	Active	5000	61	3.0	150	136	80	120	2835	25
SPMWH3228FD5WARMSC	LM281BZ+	Active	5000	61	3.0	150	136	80	120	2835	25

Engineering Selection Recommendations

For Direct Replacement (Same CCT, Active Status): SPMWH1228FD7WAPMSE is the primary direct substitute. It maintains 6500K color temperature and 90 CRI, ensuring identical visual output. The LM281B+ series designation indicates product maturity with Active status supporting new designs. Flux output reduction (58 lm vs. 61 lm) falls within acceptable tolerance for most applications. Increased thermal resistance (25°C/W vs. 17°C/W) requires thermal design verification in high-power or thermally constrained applications.

For CCT Flexibility (5700K or 5000K, Active Status): Parts SPMWH1228FD5WAQ0SA, SPMWH1228FD5WAQKSA, SPMWH1228FD5WAQMSA, SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, and SPMWH1228FD5WARMSA provide identical electrical performance (3.1V, 150mA, 61 lm @ 25°C, 131 lm/W) with lower color temperature options. CRI reduction to 80 is acceptable for general illumination applications where color accuracy is not critical. These parts support applications tolerating CCT variation between 5000K and 5700K.

For Voltage-Optimized Operation (LM281BZ+ Series, Active Status): Parts SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, and SPMWH3228FD5WARMSC offer improved efficiency (136 lm/W vs. 131 lm/W) through reduced forward voltage (3.0V vs. 3.1V). These LM281BZ+ series parts maintain identical flux output (61 lm @ 25°C) and 2835 package compatibility. Selection is appropriate for applications where lower operating voltage reduces power dissipation and improves overall system efficiency. CCT is fixed at 5000K with CRI of 80.

Compliance and Certification: All substitute parts maintain RoHS compliance and MSL 2A (4 Weeks) rating, ensuring compatibility with standard manufacturing processes and storage requirements. All parts are manufactured by Samsung Semiconductor, Inc., maintaining supply chain consistency.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD7WAPMSE replace SPMWH1228FD7WAPMS4 in existing designs?

A: Yes. SPMWH1228FD7WAPMSE is the direct equivalent with identical 6500K color temperature, 90 CRI, 3.1V forward voltage, 150mA test current, and 2835 package. Flux output is 58 lm versus 61 lm (within 5% tolerance). Thermal resistance increases from 17°C/W to 25°C/W; verify thermal design margins in applications with elevated ambient temperatures or high current density.

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

A: LM281B+ represents an improved product generation with Active status, supporting new designs. The original LM281B (SPMWH1228FD7WAPMS4) is classified "Not For New Designs." Both series share identical electrical parameters (3.1V, 150mA, 120° viewing angle, 2835 package) but differ in thermal characteristics and flux output specifications.

Q: Can I use 5700K or 5000K parts instead of 6500K?

A: Yes, if application requirements permit color temperature variation. Parts SPMWH1228FD5WAQ0SA, SPMWH1228FD5WAQKSA, SPMWH1228FD5WAQMSA, SPMWH1228FD5WAR0SA, SPMWH1228FD5WARKSA, and SPMWH1228FD5WARMSA maintain identical electrical performance (3.1V, 150mA, 61 lm @ 25°C, 131 lm/W) with lower CCT. CRI is 80 instead of 90. These substitutions are suitable for general illumination where color temperature flexibility is acceptable.

Q: What is the advantage of LM281BZ+ series parts?

A: LM281BZ+ series (SPMWH3228FD5WAR0SC, SPMWH3228FD5WARKSC, SPMWH3228FD5WARMSC) operates at 3.0V forward voltage versus 3.1V, improving efficiency to 136 lm/W. Flux output remains 61 lm @ 25°C. Lower voltage reduces power dissipation and heat generation, benefiting thermally constrained designs. CCT is fixed at 5000K with CRI of 80.

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

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

Q: What is the inventory status of substitute parts?

A: All substitute parts are in stock with Active product status. SPMWH1228FD5WAQMSA has the highest inventory (1,038 pcs), followed by SPMWH1228FD5WARKSA (1,118 pcs) and SPMWH3228FD5WAR0SC (1,082 pcs). Inventory levels support production requirements for immediate and ongoing applications.

Q: Do all parts meet RoHS compliance?

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

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