SPMWHT541MP5WAWUS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MP5WAWUS5 is a Samsung Semiconductor LM561B Plus warm white LED in 5630 surface mount package. This component delivers 33 lumens at 65mA test current with 2700K color temperature and 80 CRI. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for design continuity, inventory management, and sourcing alternatives for ongoing production or maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SPMWHT541MP5WAWUS5
Manufacturer	Samsung Semiconductor, Inc.
Series	LM561B Plus
Color / CCT	White, Warm / 2700K
Flux @ 25°C, 65mA	33 lm (32–34 lm range)
Forward Voltage (Vf)	2.95V
Test Current	65mA
Maximum Current	180mA
Lumens/Watt @ 65mA	172 lm/W
CRI	80
Viewing Angle	120°
Package / Case	4-SMD, Flat Leads
Supplier Device Package	5630
Dimensions	5.00mm L × 3.00mm W
Height (Seated Max)	0.80mm
Thermal Resistance	15°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 the following critical parameters:

Primary Matching Criteria:

Color and CCT: White, Warm 2700K
CRI: 80
Flux output: 33 lm (32–34 lm range) at 65mA test current
Package type: 4-SMD, Flat Leads in 5630 form factor
Viewing angle: 120°
Mounting type: Surface Mount
Dimensions: 5.00mm × 3.00mm
Height: 0.80mm maximum

Acceptable Parameter Variations:

Forward voltage (Vf): 2.75V to 2.95V (within typical LED tolerance)
Maximum current rating: 180mA to 200mA (higher ratings acceptable for same test current operation)
Thermal resistance: 12°C/W to 15°C/W (minor variation acceptable)
Lumens/Watt efficiency: 172–185 lm/W (performance variation within specification)
Product status: Active parts preferred over "Not For New Designs"
RoHS compliance: RoHS Compliant or ROHS3 Compliant (both acceptable)

Substitute Categories:

Category A – LM561B Plus Series (Direct Series Match): SPMWHT541MP5WAW0S5, SPMWHT541MP5WAWKS5, SPMWHT541MP5WAWMS5, SPMWHT541MP5WAWNS5, SPMWHT541MP5WAWSS5

These parts maintain identical electrical performance (2.95V Vf, 172 lm/W, 180mA max) and series designation. Differences are limited to packaging suffix codes and compliance certifications.

Category B – LM561C Series (Parametric Equivalent): SPMWHT541ML5XAW0S5, SPMWHT541ML5XAWKS5, SPMWHT541ML5XAWMS5

These parts share identical optical output (33 lm, 2700K, 80 CRI, 120° viewing angle) and mechanical form factor. The LM561C series operates at lower forward voltage (2.75V) and higher maximum current (200mA), with improved thermal resistance (12°C/W) and efficiency (184–185 lm/W). All are Active product status.

Parameter Comparison

Part Number	Series	Vf (Typ)	Flux @ 65mA	lm/W	Imax	Thermal R	Product Status	RoHS	Inventory
SPMWHT541MP5WAWUS5	LM561B Plus	2.95V	33 lm	172	180mA	15°C/W	Not For New Designs	RoHS	14012
SPMWHT541MP5WAWMS5	LM561B Plus	2.95V	33 lm	172	180mA	15°C/W	Active	ROHS3	23477
SPMWHT541MP5WAW0S5	LM561B Plus	2.95V	33 lm	172	180mA	15°C/W	Active	RoHS	741
SPMWHT541MP5WAWKS5	LM561B Plus	2.95V	33 lm	172	180mA	15°C/W	Active	RoHS	988
SPMWHT541MP5WAWNS5	LM561B Plus	2.95V	33 lm	172	180mA	15°C/W	Active	RoHS	631
SPMWHT541MP5WAWSS5	LM561B Plus	2.95V	33 lm	172	180mA	14°C/W	Active	ROHS3	886
SPMWHT541ML5XAWMS5	LM561C	2.75V	33 lm	184	200mA	12°C/W	Active	ROHS3	1652
SPMWHT541ML5XAW0S5	LM561C	2.75V	33 lm	185	200mA	12°C/W	Active	RoHS	1095
SPMWHT541ML5XAWKS5	LM561C	2.75V	33 lm	185	200mA	12°C/W	Active	RoHS	1020

Engineering Selection Recommendations

For Direct Replacement (LM561B Plus Series):

Select SPMWHT541MP5WAWMS5 as the primary substitute. This part maintains identical electrical specifications (2.95V Vf, 172 lm/W, 180mA maximum current) and mechanical form factor. It carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. Inventory availability is highest among LM561B Plus alternatives at 23,477 units.

Alternative LM561B Plus options include SPMWHT541MP5WAWSS5 (14°C/W thermal resistance, improved thermal performance), SPMWHT541MP5WAWKS5, SPMWHT541MP5WAWNS5, and SPMWHT541MP5WAW0S5. All maintain identical electrical performance and differ only in packaging suffix codes and compliance certifications.

For Performance-Enhanced Substitution (LM561C Series):

The LM561C series (SPMWHT541ML5XAWMS5, SPMWHT541ML5XAW0S5, SPMWHT541ML5XAWKS5) provides equivalent optical output with improved electrical characteristics. These parts operate at lower forward voltage (2.75V versus 2.95V), reducing power dissipation by approximately 6.7% at constant current. Thermal resistance improves to 12°C/W, and maximum current rating increases to 200mA. Efficiency ranges from 184–185 lm/W compared to 172 lm/W. All LM561C variants carry Active product status.

Compliance Considerations:

All substitute parts maintain RoHS compliance. SPMWHT541MP5WAWMS5, SPMWHT541MP5WAWSS5, and SPMWHT541ML5XAWMS5 carry ROHS3 certification, providing enhanced regulatory assurance for new applications.

Frequently Asked Questions (FAQ)

Q1: Can I use LM561C series parts as direct replacements for LM561B Plus?

A: Yes. Both series deliver identical optical output (33 lm at 2700K, 80 CRI, 120° viewing angle) in the same 5630 package. The LM561C operates at lower forward voltage (2.75V) and offers improved thermal characteristics. Circuits designed for 2.95V operation will function with LM561C at reduced power consumption. No circuit redesign is required.

Q2: What is the significance of the packaging suffix codes (MS5, 0S5, KS5, NS5, SS5)?

A: Suffix codes indicate packaging and compliance variations. These are manufacturing designations that do not affect electrical or optical performance. All variants with identical series designation (LM561B Plus or LM561C) and part number prefix deliver the same functional specifications.

Q3: Why does SPMWHT541MP5WAWSS5 show 14°C/W thermal resistance while other LM561B Plus parts show 15°C/W?

A: This represents a minor manufacturing variation within the LM561B Plus series. The 1°C/W difference is within typical tolerance and does not affect circuit design or thermal management calculations for standard applications.

Q4: Is the main part SPMWHT541MP5WAWUS5 still available for new designs?

A: No. This part carries "Not For New Designs" status, indicating end-of-life classification. For new designs, select from Active status alternatives: SPMWHT541MP5WAWMS5 (LM561B Plus) or SPMWHT541ML5XAWMS5 (LM561C).

Q5: What is the difference between RoHS and ROHS3 compliance?

A: Both certifications confirm restriction of hazardous substances. ROHS3 represents the current regulatory standard. Parts marked ROHS3 Compliant provide assurance of compliance with the latest EU directive. Both are acceptable for component selection; ROHS3 is preferred for long-term regulatory alignment.

Q6: How does the 6.7% power reduction with LM561C affect circuit design?

A: At constant 65mA test current, LM561C reduces forward voltage from 2.95V to 2.75V, lowering power dissipation from approximately 192mW to 179mW per LED. This reduces thermal load and extends operational life in thermally constrained applications. Existing current-limiting circuits require no modification.

Q7: Can I mix LM561B Plus and LM561C parts in the same assembly?

A: Yes. Both series produce identical optical output and operate within compatible voltage ranges. Mixed use is acceptable where inventory or sourcing constraints require it. Ensure current-limiting circuits accommodate the voltage range 2.75V to 2.95V.

Q8: Which substitute offers the best thermal performance?

A: SPMWHT541ML5XAWMS5 (LM561C series) provides the lowest thermal resistance at 12°C/W, compared to 15°C/W for LM561B Plus. This 20% improvement in thermal performance benefits applications with thermal constraints or extended operating life requirements.

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