SPMWHT541MP5WARUS5 LED LM561B Plus White 5000K Equivalent & Substitute Parts

Part Overview

The SPMWHT541MP5WARUS5 is a Samsung Semiconductor LED lighting component from the LM561B Plus series, specified for cool white 5000K color temperature applications. This surface-mount 5630 package LED operates at 2.95V forward voltage with 65mA test current, delivering 36 lumens at 188 lm/W efficiency and 80 CRI. 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 chain availability, and support ongoing production requirements for existing applications.

Key Parameters

Parameter	Value	Specification Range
Series	LM561B Plus	LED series designation
Color / CCT	White, Cool / 5000K	Color temperature specification
Flux @ 25°C, 65mA	36 lm	35 lm ~ 37 lm
Forward Voltage (Vf)	2.95V	Typical at 65mA
Current - Test	65mA	Standard test condition
Current - Max	180mA	Absolute maximum rating
Lumens/Watt	188 lm/W	At 65mA test current
CRI	80	Color Rendering Index
Viewing Angle	120°	Half-angle
Package / Case	4-SMD, Flat Leads	5630 supplier package
Size	5.00mm L x 3.00mm W	0.197" x 0.118"
Height - Seated (Max)	0.80mm	0.031"
Thermal Resistance	15°C/W	Package thermal rating
Mounting Type	Surface Mount	SMD technology
RoHS Status	RoHS Compliant	Environmental compliance
MSL Rating	2A (4 Weeks)	Moisture sensitivity level

Substitute Part Grouping Explanation

Substitution of SPMWHT541MP5WARUS5 is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters for Substitution:

Color temperature: 5000K cool white
Forward voltage: 2.95V nominal (LM561B Plus series)
Flux output: 36 lm at 65mA test current (35-37 lm range)
Package: 4-SMD, Flat Leads, 5630 form factor
Viewing angle: 120°
CRI: 80
Mounting: Surface mount, identical footprint

Packaging Variants (Direct Substitutes): Parts with identical electrical specifications but different packaging formats are classified as direct substitutes. SPMWHT541MP5WARKS4 differs only in packaging (Cut Tape vs. Tape & Reel) and represents a direct functional equivalent.

Series Variants (Parametric Equivalents): LM561C series parts (SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5) maintain identical flux output (36 lm), color temperature (5000K), CRI (80), and package geometry. The LM561C series operates at lower forward voltage (2.75V vs. 2.95V) and exhibits higher efficiency (201 lm/W vs. 188 lm/W), with improved thermal resistance (12°C/W vs. 15°C/W). These represent parametric equivalents suitable for applications where lower voltage operation and improved thermal performance are compatible with circuit design.

Active Status Variants (LM561B Plus): SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5, and SPMWHT541MP5WARSS5 are all LM561B Plus series parts with identical electrical specifications to the main part. These variants differ only in packaging format or RoHS certification revision level, all maintaining the 2.95V forward voltage, 36 lm flux, and 188 lm/W efficiency.

Parameter Comparison

Part Number	Series	Status	Packaging	Vf (V)	Flux @ 65mA (lm)	lm/W	Thermal Resistance (°C/W)	RoHS	Inventory (Pcs)
SPMWHT541MP5WARUS5	LM561B Plus	Not For New Designs	Tape & Reel	2.95	36	188	15	RoHS Compliant	731
SPMWHT541MP5WARKS4	LM561B Plus	Active	Cut Tape	2.95	34	177	15	ROHS3 Compliant	73313
SPMWHT541ML5XAR0S5	LM561C	Active	Tape & Reel	2.75	36	201	12	ROHS3 Compliant	921
SPMWHT541ML5XARKS5	LM561C	Active	Tape & Reel	2.75	36	201	12	RoHS Compliant	820
SPMWHT541ML5XARMS5	LM561C	Active	Tape & Reel	2.75	36	201	12	RoHS Compliant	972
SPMWHT541MP5WAR0S5	LM561B Plus	Active	Tape & Reel	2.95	36	188	15	ROHS3 Compliant	17892
SPMWHT541MP5WARKS5	LM561B Plus	Active	Tape & Reel	2.95	36	188	15	RoHS Compliant	5400
SPMWHT541MP5WARMS5	LM561B Plus	Active	Tape & Reel	2.95	36	188	15	RoHS Compliant	1069
SPMWHT541MP5WARNS5	LM561B Plus	Active	Tape & Reel	2.95	36	188	15	RoHS Compliant	941
SPMWHT541MP5WARSS5	LM561B Plus	Active	Tape & Reel	2.95	36	188	15	ROHS3 Compliant	1039

Engineering Selection Recommendations

For Direct Electrical and Mechanical Equivalence (LM561B Plus Series):

Select SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5, or SPMWHT541MP5WARSS5 when exact electrical performance matching is required. All maintain 2.95V forward voltage, 36 lm flux output, and 188 lm/W efficiency. These parts are in Active product status, ensuring long-term supply availability. SPMWHT541MP5WAR0S5 offers the highest inventory level (17,892 pcs), supporting volume production requirements. All variants comply with RoHS or ROHS3 standards.

For Packaging Format Substitution:

SPMWHT541MP5WARKS4 (Cut Tape packaging) provides an alternative to Tape & Reel format while maintaining LM561B Plus series specifications. Note that flux output is specified at 34 lm (33-35 lm range) compared to 36 lm for other variants, and efficiency is 177 lm/W. This part is suitable only when Cut Tape packaging is compatible with assembly processes and the lower flux specification is acceptable.

For Improved Thermal Performance and Efficiency:

SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, or SPMWHT541ML5XARMS5 (LM561C series) are suitable when circuit design accommodates 2.75V forward voltage operation. These parts deliver identical 36 lm flux and 80 CRI with superior efficiency (201 lm/W vs. 188 lm/W) and improved thermal resistance (12°C/W vs. 15°C/W). All three LM561C variants are in Active status with adequate inventory levels (820-972 pcs).

Compliance Considerations:

All substitute parts maintain RoHS compliance. ROHS3 certified variants (SPMWHT541MP5WAR0S5, SPMWHT541MP5WARSS5, SPMWHT541ML5XAR0S5) represent the latest compliance revision. All parts carry MSL 2A (4 Weeks) moisture sensitivity rating and identical ECCN/HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WARKS4 (Cut Tape) be used as a direct replacement for SPMWHT541MP5WARUS5 (Tape & Reel)?

A: SPMWHT541MP5WARKS4 is electrically equivalent in series and color temperature but differs in two aspects: packaging format (Cut Tape vs. Tape & Reel) and flux specification (34 lm vs. 36 lm). Assembly equipment compatibility with Cut Tape format must be verified. The lower flux specification (34 lm, 33-35 lm range) may impact luminous output in applications requiring the full 36 lm specification.

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

A: Both series deliver identical 36 lm flux output, 5000K color temperature, 120° viewing angle, and 80 CRI. The primary differences are: LM561B Plus operates at 2.95V forward voltage with 188 lm/W efficiency and 15°C/W thermal resistance; LM561C operates at 2.75V forward voltage with 201 lm/W efficiency and 12°C/W thermal resistance. LM561C represents improved performance with lower voltage operation and better thermal characteristics. Circuit design must accommodate the 0.2V voltage difference.

Q: Are all substitute parts suitable for new production designs?

A: The original part SPMWHT541MP5WARUS5 is marked Not For New Designs. All substitute parts listed are in Active product status and suitable for new designs. SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5, and SPMWHT541MP5WARSS5 (LM561B Plus series) are recommended for new designs requiring exact electrical equivalence. LM561C series parts are recommended when improved efficiency and thermal performance are design objectives.

Q: What inventory levels support production volume requirements?

A: SPMWHT541MP5WAR0S5 offers the highest availability with 17,892 pcs in stock. SPMWHT541MP5WARKS4 (Cut Tape) provides 73,313 pcs. For LM561C series, SPMWHT541ML5XARMS5 offers 972 pcs, SPMWHT541ML5XAR0S5 offers 921 pcs, and SPMWHT541ML5XARKS5 offers 820 pcs. Inventory levels should be verified against production schedules and lead time requirements.

Q: Do all parts maintain identical mechanical compatibility?

A: Yes. All substitute parts share identical package specifications: 4-SMD, Flat Leads, 5630 form factor, 5.00mm L x 3.00mm W footprint, and 0.80mm maximum seated height. Mechanical compatibility with PCB layouts and assembly processes is maintained across all variants. Packaging format differences (Tape & Reel vs. Cut Tape) affect handling and assembly automation compatibility, not mechanical fit.

Q: What are the RoHS compliance differences between variants?

A: All parts are RoHS compliant. Variants are designated either RoHS Compliant or ROHS3 Compliant, representing different certification revision levels. Both designations meet current environmental regulations. ROHS3 represents the latest certification standard. Selection between RoHS and ROHS3 variants depends on customer or regional compliance requirements.

Q: Can thermal resistance differences impact circuit performance?

A: Yes. LM561C series parts (12°C/W) offer 3°C/W improvement over LM561B Plus (15°C/W). In high-current or high-ambient-temperature applications, improved thermal resistance reduces junction temperature rise. This is particularly relevant for applications operating near maximum current ratings (180mA for LM561B Plus, 200mA for LM561C). Thermal modeling should account for these differences in designs with thermal constraints.

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