SPMWH1228FD5WAWUS2 LED Equivalent & Substitute Parts

Part Overview

The SPMWH1228FD5WAWUS2 is a Samsung Semiconductor LM281B warm white LED in 2835 metric package (1113 case). This component operates at 2700K color temperature with 55 lumens output at 150mA test current and 3.1V forward voltage. The part is classified as "Not For New Designs," indicating end-of-life status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and field replacement applications.

Key Parameters

Parameter	Value	Unit
Series	LM281B	—
Color	White, Warm	—
CCT (Correlated Color Temperature)	2700K	K
Flux @ 25°C, 150mA	55 lm (53–57 lm range)	lm
Current - Test	150 mA	mA
Voltage - Forward (Vf) Typical	3.1 V	V
Lumens/Watt @ 150mA	118 lm/W	lm/W
CRI (Color Rendering Index)	80	—
Current - Maximum	160 mA	mA
Viewing Angle	120°	—
Package / Case	1113 (2835 Metric)	—
Size / Dimension	3.50 × 2.80 mm	mm
Height - Seated (Max)	0.75 mm	mm
Thermal Resistance	25°C/W	°C/W
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

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

Primary Substitution Criteria:

Color: White, Warm (2700K)
Package / Case: 1113 (2835 Metric)
Flux @ 25°C, 150mA: 55 lm (53–57 lm range)
Current - Test: 150 mA
Viewing Angle: 120°
CRI: 80
Mounting Type: Surface Mount
RoHS Compliance: RoHS Compliant
MSL: 2A (4 Weeks)

Group 1: LM281B+ Series (Active Status) Parts SPMWH1228FD5WAW0SA, SPMWH1228FD5WAWKSA, and SPMWH1228FD5WAWMSA are direct parametric equivalents. These parts maintain identical electrical and optical specifications to the main part, with the exception of product status (Active vs. Not For New Designs). Forward voltage remains 3.1V, and all dimensional and thermal characteristics are preserved. These parts are suitable for direct substitution in existing designs.

Group 2: LM281BZ+ Series (Active Status, Enhanced Efficiency) Parts SPMWH3228FD5WAW0SC, SPMWH3228FD5WAWKSC, and SPMWH3228FD5WAWMSC represent an enhanced variant with improved luminous efficacy (122 lm/W vs. 118 lm/W). The forward voltage is reduced to 3.0V (vs. 3.1V). All other parameters—flux output, color temperature, package, dimensions, and compliance—remain equivalent. These parts are suitable for substitution where the lower forward voltage and higher efficiency are compatible with circuit design.

Parameter Comparison

Parameter	SPMWH1228FD5WAWUS2 (Main)	SPMWH1228FD5WAW0SA	SPMWH1228FD5WAWKSA	SPMWH1228FD5WAWMSA	SPMWH3228FD5WAW0SC	SPMWH3228FD5WAWKSC	SPMWH3228FD5WAWMSC
Series	LM281B	LM281B+	LM281B+	LM281B+	LM281BZ+	LM281BZ+	LM281BZ+
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active
Color	White, Warm	White, Warm	White, Warm	White, Warm	White, Warm	White, Warm	White, Warm
CCT (K)	2700K	2700K	2700K	2700K	2700K	2700K	2700K
Flux @ 25°C, 150mA (lm)	55 (53–57)	55 (53–57)	55 (53–57)	55 (53–57)	55 (53–57)	55 (53–57)	55 (53–57)
Current - Test (mA)	150	150	150	150	150	150	150
Voltage - Forward (Vf) Typical (V)	3.1	3.1	3.1	3.1	3.0	3.0	3.0
Lumens/Watt @ 150mA (lm/W)	118	118	118	118	122	122	122
CRI	80	80	80	80	80	80	80
Current - Max (mA)	160	160	160	160	160	160	160
Viewing Angle	120°	120°	120°	120°	120°	120°	120°
Package / Case	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)	1113 (2835 Metric)
Size / Dimension (mm)	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80	3.50 × 2.80
Height - Seated Max (mm)	0.75	0.75	0.75	0.75	0.75	0.75	0.75
Thermal Resistance (°C/W)	25	25	25	25	25	25	25
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
MSL	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)	2A (4 Weeks)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select SPMWH1228FD5WAW0SA, SPMWH1228FD5WAWKSA, or SPMWH1228FD5WAWMSA. These LM281B+ variants maintain 100% electrical and optical equivalence to the main part. All three are in Active product status, ensuring long-term availability. Selection among these three is based on inventory availability and supply chain logistics. All three carry identical RoHS compliance and MSL ratings.

For Enhanced Efficiency Applications: Select SPMWH3228FD5WAW0SC, SPMWH3228FD5WAWKSC, or SPMWH3228FD5WAWMSC. The LM281BZ+ series offers 122 lm/W efficiency versus 118 lm/W, with forward voltage reduced to 3.0V. This substitution is suitable for designs where lower power dissipation and improved efficiency are compatible with the circuit topology. The 0.1V reduction in forward voltage must be evaluated against the power supply and current-limiting circuit design. All LM281BZ+ variants maintain identical flux output, color temperature, package dimensions, and compliance certifications.

Compliance Verification: All substitute parts are RoHS Compliant with MSL 2A (4 Weeks) rating, matching the main part. No additional compliance actions are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAW0SA be used as a direct replacement for SPMWH1228FD5WAWUS2?

A: Yes. SPMWH1228FD5WAW0SA is a parametric equivalent with identical electrical specifications (3.1V forward voltage, 150mA test current, 55 lm output), optical characteristics (2700K, 80 CRI, 120° viewing angle), and package dimensions (2835 metric, 3.50 × 2.80 mm). The only difference is product status (Active vs. Not For New Designs). Direct substitution is supported.

Q: What is the difference between the LM281B+ and LM281BZ+ series?

A: The LM281BZ+ series (SPMWH3228 base number) offers improved luminous efficacy at 122 lm/W compared to 118 lm/W for LM281B+. Forward voltage is reduced from 3.1V to 3.0V. Flux output, color temperature, CRI, package, and all mechanical dimensions remain identical. The LM281BZ+ is suitable for designs where lower forward voltage and higher efficiency are compatible with the circuit design.

Q: Are all substitute parts available in the same packaging format?

A: LM281B+ variants (SPMWH1228 base) are supplied in Tape & Reel (TR) packaging. LM281BZ+ variants (SPMWH3228 base) do not specify packaging format in the provided data. Confirm packaging requirements with the supplier before procurement.

Q: Can I substitute SPMWH3228FD5WAW0SC if my circuit is designed for 3.1V forward voltage?

A: The LM281BZ+ operates at 3.0V forward voltage, which is 0.1V lower than the main part. This substitution is valid only if the power supply and current-limiting circuit can accommodate the lower voltage. Verify that the circuit topology supports this voltage reduction without affecting LED brightness or circuit stability.

Q: Do all substitute parts have the same thermal characteristics?

A: Yes. All substitute parts maintain 25°C/W thermal resistance, identical to the main part. Thermal management design does not require modification for any of the listed substitutes.

Q: What is the significance of the different suffix codes (0SA, KSA, MSA, 0SC, KSC, MSC)?

A: The suffix codes indicate different manufacturing lots or binning categories within the same electrical and optical specification. All parts with the same base number and series designation meet identical parametric requirements. Selection among different suffix codes is based on inventory availability and supply chain preference.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS Compliant with MSL 2A (4 Weeks) rating, matching the main part. No additional environmental or regulatory compliance actions are required for substitution.

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