SPMWH3228FD5WAT0S4 LED Equivalent & Substitute Parts

Part Overview

The SPMWH3228FD5WAT0S4 is a Samsung Semiconductor surface-mount LED in the 2835 metric package (1113 case code), emitting neutral white light at 4000K color temperature. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. Organizations currently using this part in active production or maintenance applications require equivalent substitute components to ensure supply chain continuity and design compatibility.

The part delivers 67 lumens at 25°C under 150mA test current with a forward voltage of 3.1V typical and 80 CRI (Color Rendering Index). Its 120° viewing angle and compact 3.50mm × 2.80mm footprint make it suitable for general illumination applications requiring neutral white output.

Key Parameters

Parameter	Value	Unit
Series	LM281BZ	—
Color	White, Neutral	—
CCT (Correlated Color Temperature)	4000K	K
Flux @ 25°C, 150mA Test Current	67 (65–69)	lm
Forward Voltage (Vf) Typical	3.1	V
Test Current	150	mA
Maximum Current	160	mA
Lumens per Watt @ Test Current	144	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120	°
Package / Case	1113 (2835 Metric)	—
Size / Dimension	3.50 × 2.80	mm
Height – Seated (Max)	0.75	mm
Thermal Resistance of Package	25	°C/W
Mounting Type	Surface Mount	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWH3228FD5WAT0S4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Color: White, Neutral
CCT: 4000K
Flux @ 25°C, 150mA: 67 lm (65–69 lm range)
Forward Voltage (Vf) Typical: 3.1V or 3.0V
Test Current: 150mA
Maximum Current: 160mA
CRI: 80
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
MSL: 2A (4 Weeks)

Substitute Parts Identified:

Group 1: LM281B Series (Not For New Designs)

SPMWH1228FD5WAT0S4
SPMWH1228FD5WATMS4
SPMWH1228FD5WATUS4

These parts share identical electrical and mechanical specifications with the main part, differing only in base product number (SPMWH1228 vs. SPMWH3228) and packaging designation suffix. All three maintain 3.1V forward voltage, 67 lm output, and 144 lm/W efficiency.

Group 2: LM281BZ+ Series (Active Status)

SPMWH3228FD5WAT0SG
SPMWH3228FD5WATKSG
SPMWH3228FD5WATMSG

These parts represent the active-status successor to the LM281BZ series. They maintain identical optical output (67 lm, 4000K, 80 CRI, 120° viewing angle) and mechanical compatibility. The forward voltage is reduced to 3.0V typical (compared to 3.1V in the main part), resulting in improved efficiency at 149 lm/W. These parts are suitable for new designs and provide superior supply chain availability.

Parameter Comparison

Parameter	SPMWH3228FD5WAT0S4 (Main)	SPMWH1228FD5WAT0S4	SPMWH1228FD5WATMS4	SPMWH1228FD5WATUS4	SPMWH3228FD5WAT0SG	SPMWH3228FD5WATKSG	SPMWH3228FD5WATMSG
Series	LM281BZ	LM281B	LM281B	LM281B	LM281BZ+	LM281BZ+	LM281BZ+
Product Status	Not For New Designs	Not For New Designs	Not For New Designs	Not For New Designs	Active	Active	Active
Color	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral	White, Neutral
CCT (K)	4000	4000	4000	4000	4000	4000	4000
Flux @ 25°C, 150mA (lm)	67 (65–69)	67 (65–69)	67 (65–69)	67 (65–69)	67 (65–69)	67 (65–69)	67 (65–69)
Forward Voltage Vf Typ (V)	3.1	3.1	3.1	3.1	3.0	3.0	3.0
Test Current (mA)	150	150	150	150	150	150	150
Maximum Current (mA)	160	160	160	160	160	160	160
Lumens/Watt @ Test Current	144	144	144	144	149	149	149
CRI	80	80	80	80	80	80	80
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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
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)
Inventory Status	928 Pcs New Original	39914 Pcs New Original	8482 Pcs New Original	38946 Pcs New Original	774 Pcs New Original	902 Pcs New Original	677 Pcs New Original

Engineering Selection Recommendations

For Existing Designs (Maintenance & Repair):

The LM281B series substitutes (SPMWH1228FD5WAT0S4, SPMWH1228FD5WATMS4, SPMWH1228FD5WATUS4) provide direct electrical and mechanical equivalence to the SPMWH3228FD5WAT0S4. These parts maintain identical forward voltage (3.1V), luminous flux (67 lm), and efficiency (144 lm/W). Although classified as "Not For New Designs," they are suitable for sustaining production of existing products where design changes are not feasible. Inventory availability is significantly higher across all three variants (8,482–39,914 units), ensuring supply continuity for near-term requirements.

For New Designs & Long-Term Supply:

The LM281BZ+ series (SPMWH3228FD5WAT0SG, SPMWH3228FD5WATKSG, SPMWH3228FD5WATMSG) represents the active-status successor platform. These parts deliver the same optical performance (67 lm, 4000K, 80 CRI, 120° viewing angle) and maintain full mechanical compatibility with the 2835 metric package. The forward voltage reduction to 3.0V typical yields improved efficiency (149 lm/W vs. 144 lm/W), reducing power dissipation and thermal load in circuit designs. Active product status ensures long-term availability and continued manufacturing support. These parts are recommended for all new product development and design refreshes.

Compliance & Certification:

All substitute parts carry RoHS Compliant certification and MSL 2A (4 Weeks) moisture sensitivity rating, matching the original part's environmental and regulatory compliance profile. No additional qualification or testing is required for substitution within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can SPMWH1228FD5WAT0S4 directly replace SPMWH3228FD5WAT0S4 without circuit modification?

A: Yes. The SPMWH1228FD5WAT0S4 maintains identical electrical specifications (3.1V forward voltage, 150mA test current, 67 lm output) and mechanical dimensions (3.50mm × 2.80mm, 0.75mm height). The 2835 metric package footprint is identical. No circuit redesign is required.

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

A: Both series deliver identical optical output (67 lm, 4000K, 80 CRI) and mechanical compatibility. The LM281BZ+ series features a reduced forward voltage of 3.0V typical (compared to 3.1V in LM281B), resulting in 5 lm/W higher efficiency (149 lm/W vs. 144 lm/W). LM281BZ+ parts carry Active product status, ensuring long-term supply availability.

Q: Are the packaging designations (TR, blank) significant for substitution?

A: The packaging designation suffix (TR for Tape & Reel, blank for unspecified) indicates the physical delivery format but does not affect electrical or mechanical compatibility. All parts listed are surface-mount components in the 2835 metric package suitable for automated assembly.

Q: What is the inventory status for each substitute part?

A: SPMWH1228FD5WATUS4 has the highest inventory (38,946 units), followed by SPMWH1228FD5WAT0S4 (39,914 units). SPMWH1228FD5WATMS4 has 8,482 units. Among the active LM281BZ+ series, SPMWH3228FD5WATKSG has 902 units, SPMWH3228FD5WAT0SG has 774 units, and SPMWH3228FD5WATMSG has 677 units.

Q: Can LM281BZ+ parts be used in designs originally specified for LM281BZ?

A: Yes. The LM281BZ+ series is the active successor to LM281BZ. All optical parameters (color, CCT, flux, CRI, viewing angle) and mechanical specifications (package, dimensions, height) are identical. The 0.1V reduction in forward voltage (3.0V vs. 3.1V) improves efficiency and reduces thermal dissipation, making it a superior choice for new designs.

Q: What is the significance of the MSL 2A (4 Weeks) rating?

A: MSL 2A indicates Moisture Sensitivity Level 2A with a floor life of 4 weeks after bag opening. Components must be stored in dry conditions and used within the specified timeframe to prevent moisture absorption, which could cause solder joint failures during reflow assembly. All substitute parts share this rating with the original part.

Q: Are there any thermal or reliability differences between substitute parts?

A: All substitute parts maintain identical thermal resistance (25°C/W) and are RoHS Compliant with matching MSL ratings. No thermal or reliability performance differences exist within the specified parameter ranges.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message