SPMWHT541MP5WAUUS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MP5WAUUS5 is a Samsung Semiconductor LM561B Plus warm white LED in 5630 package format, rated at 3500K color temperature with 65mA test current and 2.95V forward voltage. This component is classified as "Not For New Designs," indicating it has reached end-of-life status in Samsung's product portfolio. The LM561B Plus series has been superseded by the LM561C series, which offers improved thermal characteristics and higher luminous efficacy. Identifying compatible substitute parts is essential for ongoing production support, maintenance applications, and design transitions to active product lines.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	SPMWHT541MP5WAUUS5	—
Series	LM561B Plus	—
Color	White, Warm	—
CCT (Correlated Color Temperature)	3500K	K
Flux @ 25°C, 65mA Test Current	34 lm (33–35 lm range)	lm
Forward Voltage (Vf) Typical	2.95	V
Test Current	65	mA
Maximum Current	180	mA
Lumens per Watt @ 65mA	177	lm/W
CRI (Color Rendering Index)	80	—
Viewing Angle	120	°
Package / Case	4-SMD, Flat Leads	—
Supplier Device Package	5630	—
Dimensions (L × W)	5.00 × 3.00	mm
Height Seated (Max)	0.80	mm
Thermal Resistance	15	°C/W
Mounting Type	Surface Mount	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	2A (4 Weeks)	—
Product Status	Not For New Designs	—

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MP5WAUUS5 is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Color: White, Warm (fixed requirement)
CCT: 3500K or 3000K (warm white spectrum)
Flux @ 25°C, 65mA: 34 lm (33–35 lm range)
Test Current: 65mA
CRI: 80
Viewing Angle: 120°
Package / Case: 4-SMD, Flat Leads
Supplier Device Package: 5630
Dimensions: 5.00mm × 3.00mm
Height Seated: 0.80mm
Mounting Type: Surface Mount
RoHS Compliance: Required

Secondary Compatibility Parameters:

Forward Voltage (Vf): 2.75V–2.95V (acceptable range for circuit design)
Maximum Current: 180mA–200mA (acceptable range)
Thermal Resistance: 12°C/W–16°C/W (acceptable range)
Lumens per Watt: 177–190 lm/W (acceptable range)

Substitute parts are grouped into two series categories:

Group 1: LM561B Plus Series (3500K) Parts maintaining identical series designation and 3500K color temperature with 2.95V forward voltage and 15°C/W thermal resistance. These are direct functional equivalents with identical electrical performance.

Group 2: LM561C Series (3500K and 3000K) Parts from the active LM561C series offering improved thermal performance (12°C/W) and higher luminous efficacy (190 lm/W) while maintaining 3500K or 3000K color temperature, 2.75V forward voltage, and identical mechanical form factor. These represent technology upgrades suitable for new production.

Parameter Comparison

Parameter	SPMWHT541MP5WAUUS5 (Main)	SPMWHT541MP5WAU0S5	SPMWHT541MP5WAUKS5	SPMWHT541MP5WAUMS5	SPMWHT541MP5WAUNS5	SPMWHT541ML5XAU0S5	SPMWHT541ML5XAUKS5	SPMWHT541ML5XAUMS5
Series	LM561B Plus	LM561B Plus	LM561B Plus	LM561B Plus	LM561B Plus	LM561C	LM561C	LM561C
CCT (K)	3500	3500	3500	3500	3500	3500	3500	3500
Vf (V) Typical	2.95	2.95	2.95	2.95	2.95	2.75	2.75	2.75
Flux @ 25°C, 65mA (lm)	34	34	34	34	34	34	34	34
Test Current (mA)	65	65	65	65	65	65	65	65
Max Current (mA)	180	180	180	180	180	200	200	200
lm/W @ 65mA	177	177	177	177	177	190	190	190
CRI	80	80	80	80	80	80	80	80
Viewing Angle (°)	120	120	120	120	120	120	120	120
Package	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads
5630 Package	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Dimensions (mm)	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00	5.00 × 3.00
Height Seated (mm)	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80
Thermal Resistance (°C/W)	15	15	15	16	15	12	12	12
RoHS Status	RoHS Compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

For Ongoing Production Support (Direct Replacement):

Select SPMWHT541MP5WAU0S5, SPMWHT541MP5WAUKS5, SPMWHT541MP5WAUMS5, or SPMWHT541MP5WAUNS5 from the LM561B Plus series. These parts maintain identical electrical specifications (2.95V forward voltage, 177 lm/W efficiency, 15°C/W thermal resistance) and are classified as Active products. All are available in Tape & Reel packaging and maintain full RoHS compliance. These substitutes provide seamless drop-in replacement capability for existing designs without circuit modification.

For New Design Implementation (Technology Upgrade):

Transition to LM561C series parts: SPMWHT541ML5XAU0S5, SPMWHT541ML5XAUKS5, or SPMWHT541ML5XAUMS5 for 3500K applications. These active products deliver superior thermal performance (12°C/W versus 15°C/W) and higher luminous efficacy (190 lm/W versus 177 lm/W). The 0.20V reduction in forward voltage (2.75V versus 2.95V) requires circuit verification but enables improved power efficiency. All LM561C variants maintain identical mechanical form factor, CRI, viewing angle, and RoHS compliance.

Packaging Consideration:

SPMWHT541ML5XAU0S5 is supplied in Cut Tape (CT) format; all other substitutes are available in Tape & Reel (TR). Select packaging based on production volume and assembly equipment compatibility.

Compliance Verification:

All substitute parts meet RoHS requirements. SPMWHT541MP5WAU0S5, SPMWHT541ML5XAUMS5, and SPMWHT541ML5XAVMS5 carry ROHS3 certification; remaining parts carry standard RoHS Compliant status. Moisture Sensitivity Level (MSL) is uniform at 2A (4 Weeks) across all parts.

Frequently Asked Questions (FAQ)

Q1: Can SPMWHT541MP5WAUUS5 be replaced with LM561C series parts?

A: Yes. LM561C series parts (SPMWHT541ML5XAU0S5, SPMWHT541ML5XAUKS5, SPMWHT541ML5XAUMS5) are parametric equivalents meeting all mechanical and optical specifications. The forward voltage difference (2.75V versus 2.95V) must be evaluated in the circuit design to confirm compatibility with existing current-limiting resistor values or driver circuits. Thermal performance improves with LM561C (12°C/W versus 15°C/W).

Q2: What is the difference between LM561B Plus and LM561C series?

A: LM561B Plus (main part series) is classified "Not For New Designs" and represents an earlier generation. LM561C is the active successor offering improved thermal resistance (12°C/W versus 15°C/W) and higher luminous efficacy (190 lm/W versus 177 lm/W). Both maintain identical optical output (34 lm at 65mA), CRI (80), viewing angle (120°), and mechanical form factor (5630 package, 5.00mm × 3.00mm).

Q3: Are all substitute parts available in Tape & Reel packaging?

A: No. SPMWHT541ML5XAU0S5 is supplied in Cut Tape (CT) format. All other substitutes are available in Tape & Reel (TR). Verify packaging compatibility with your assembly equipment before selection.

Q4: What is the impact of forward voltage difference on circuit design?

A: LM561B Plus parts operate at 2.95V typical forward voltage; LM561C parts operate at 2.75V. This 0.20V difference affects current-limiting resistor calculations and power dissipation. For constant-current driver circuits, no modification is required. For resistor-based current limiting, recalculate resistor values using the new forward voltage to maintain 65mA test current. Power consumption decreases with LM561C due to lower forward voltage.

Q5: Can SPMWHT541MP5WAUUS5 be used interchangeably with 3000K variants?

A: No. SPMWHT541MP5WAUUS5 is specified at 3500K color temperature. Substitution with 3000K parts (SPMWHT541ML5XAV0S5, SPMWHT541ML5XAVKS5, SPMWHT541ML5XAVMS5) is not permitted unless the application explicitly allows 3000K color temperature. Color temperature is a fixed optical specification determined by phosphor composition and cannot be modified post-manufacture.

Q6: What is the thermal resistance significance?

A: Thermal resistance (°C/W) indicates heat dissipation efficiency. Lower values indicate better thermal performance. LM561C parts (12°C/W) dissipate heat more efficiently than LM561B Plus parts (15°C/W). In high-ambient-temperature applications or high-density LED arrays, LM561C provides superior thermal management and extended operational life.

Q7: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts meet RoHS requirements. Three variants (SPMWHT541MP5WAU0S5, SPMWHT541ML5XAUMS5, SPMWHT541ML5XAVMS5) carry ROHS3 certification; remaining parts carry standard RoHS Compliant status. Both certifications satisfy RoHS Directive 2011/65/EU requirements.

Q8: What inventory status should influence part selection?

A: Inventory levels are provided for reference only and do not determine substitution eligibility. Selection should prioritize product status (Active versus Not For New Designs) and electrical compatibility. For ongoing production, Active-status parts ensure long-term supply continuity.

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