SPMWHT541MP5WARRS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MP5WARRS5 is a Samsung Semiconductor LM561B Plus white LED in 5630 surface mount package, specified for cool white 5000K color temperature applications. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. The LM561B Plus series delivers 36 lumens at 65mA test current with 2.95V forward voltage and 120° viewing angle in a compact 5.00mm × 3.00mm footprint.

Due to its discontinued design status, equivalent substitute parts from the active LM561B Plus and LM561C series are available to maintain design continuity and ensure supply chain availability for existing applications.

Key Parameters

Parameter	Value	Unit
Series	LM561B Plus
Color	White, Cool
CCT (Correlated Color Temperature)	5000K
Flux @ 25°C, 65mA Test Current	36 lm (35–37 lm range)
Forward Voltage (Vf) Typical	2.95V
Test Current	65mA
Maximum Current	180mA
Lumens/Watt @ 65mA	188 lm/W
CRI (Color Rendering Index)	80
Viewing Angle	120°
Package / Case	4-SMD, Flat Leads
Supplier Device Package	5630
Size / Dimension	5.00 × 3.00mm
Height – Seated (Max)	0.80mm
Thermal Resistance	15°C/W
Mounting Type	Surface Mount
Packaging	Tape & Reel (TR)
Moisture Sensitivity Level (MSL)	2A (4 Weeks)
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across electrical, optical, and mechanical specifications:

Primary Substitution Criteria:

Color temperature: 5000K (cool white)
Color: White, Cool
CRI: 80
Viewing angle: 120°
Package type: 4-SMD, Flat Leads
Supplier device package: 5630
Physical dimensions: 5.00mm × 3.00mm
Height seated (max): 0.80mm
Test current: 65mA
Flux output: 36 lm (35–37 lm range)
Mounting type: Surface Mount
Packaging format: Tape & Reel (TR)
Moisture sensitivity: 2A (4 Weeks)

Acceptable Parameter Variations:

Forward voltage (Vf): 2.75V to 2.95V (LM561C operates at 2.75V; LM561B Plus at 2.95V)
Maximum current: 180mA to 200mA
Thermal resistance: 12°C/W to 15°C/W
Lumens/Watt: 188 to 201 lm/W
Product status: Active or Not For New Designs
RoHS compliance: RoHS Compliant or ROHS3 Compliant

Series Compatibility:

LM561B Plus series (main part series)
LM561C series (parametric equivalent with improved efficiency)

All substitute parts maintain identical optical output, color specification, and mechanical form factor, ensuring direct PCB compatibility without design modification.

Parameter Comparison

Part Number	Series	Vf (Typ)	Flux @ 65mA	lm/W	Imax	Thermal R	Product Status	RoHS	Inventory
SPMWHT541MP5WARRS5	LM561B Plus	2.95V	36 lm	188	180mA	15°C/W	Not For New Designs	RoHS Compliant	829 Pcs
SPMWHT541ML5XAR0S5	LM561C	2.75V	36 lm	201	200mA	12°C/W	Active	ROHS3 Compliant	921 Pcs
SPMWHT541ML5XARKS5	LM561C	2.75V	36 lm	201	200mA	12°C/W	Active	RoHS Compliant	820 Pcs
SPMWHT541ML5XARMS5	LM561C	2.75V	36 lm	201	200mA	12°C/W	Active	RoHS Compliant	972 Pcs
SPMWHT541MP5WAR0S5	LM561B Plus	2.95V	36 lm	188	180mA	15°C/W	Active	ROHS3 Compliant	17892 Pcs
SPMWHT541MP5WARKS5	LM561B Plus	2.95V	36 lm	188	180mA	15°C/W	Active	RoHS Compliant	5400 Pcs
SPMWHT541MP5WARMS5	LM561B Plus	2.95V	36 lm	188	180mA	15°C/W	Active	RoHS Compliant	1069 Pcs
SPMWHT541MP5WARNS5	LM561B Plus	2.95V	36 lm	188	180mA	15°C/W	Active	RoHS Compliant	941 Pcs
SPMWHT541MP5WARSS5	LM561B Plus	2.95V	36 lm	188	180mA	14°C/W	Active	ROHS3 Compliant	1039 Pcs

Engineering Selection Recommendations

For Direct Series Replacement (LM561B Plus):

Select from SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5, or SPMWHT541MP5WARSS5 when maintaining the original LM561B Plus series specification is required. All variants deliver identical electrical and optical performance (2.95V Vf, 188 lm/W, 180mA max current). These parts are classified as Active and carry current RoHS compliance certifications. SPMWHT541MP5WAR0S5 offers the highest inventory availability (17,892 pcs) for volume production requirements.

For Series Upgrade (LM561C):

Select from SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, or SPMWHT541ML5XARMS5 when improved thermal performance and efficiency are acceptable. The LM561C series operates at 2.75V forward voltage (0.20V lower than LM561B Plus), delivers superior efficiency (201 lm/W versus 188 lm/W), and features reduced thermal resistance (12°C/W versus 15°C/W). All LM561C variants maintain identical optical output (36 lm), color temperature (5000K), and mechanical form factor. These parts are classified as Active with current RoHS compliance. The lower forward voltage reduces power dissipation in series-connected LED strings.

Compliance Considerations:

All substitute parts meet RoHS requirements. SPMWHT541MP5WAR0S5, SPMWHT541MP5WARSS5, and SPMWHT541ML5XAR0S5 carry ROHS3 Compliant certification. Remaining variants carry RoHS Compliant certification. Selection should align with customer compliance documentation requirements.

Thermal Management:

LM561C variants (12°C/W) are preferred in thermally constrained applications. LM561B Plus variants with 14°C/W thermal resistance (SPMWHT541MP5WARSS5) offer intermediate thermal performance.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WARRS5 be replaced with LM561C series parts?

A: Yes. LM561C variants (SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5) are parametric equivalents. Both series deliver 36 lumens at 5000K with 120° viewing angle in identical 5630 packages. The primary difference is forward voltage: LM561C operates at 2.75V versus LM561B Plus at 2.95V. This 0.20V reduction improves efficiency (201 lm/W versus 188 lm/W) and reduces thermal resistance (12°C/W versus 15°C/W). No PCB modifications are required.

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

A: Both series share identical optical specifications (36 lm, 5000K, 80 CRI, 120° viewing angle) and mechanical form factor (5630 package, 5.00 × 3.00mm). LM561C represents a newer generation with improved electrical efficiency. LM561C operates at lower forward voltage (2.75V), delivers higher lumens per watt (201 lm/W), supports higher maximum current (200mA versus 180mA), and features superior thermal resistance (12°C/W versus 15°C/W). LM561B Plus is classified as "Not For New Designs"; LM561C is Active.

Q: Are all substitute parts mechanically compatible?

A: Yes. All substitute parts share identical mechanical specifications: 4-SMD flat lead package, 5630 supplier device package, 5.00 × 3.00mm dimensions, and 0.80mm maximum seated height. All are surface mount components in Tape & Reel packaging with 2A MSL (4 weeks). Direct PCB substitution is possible without layout modification.

Q: Which substitute part offers the best inventory availability?

A: SPMWHT541MP5WAR0S5 (LM561B Plus series) provides the highest inventory: 17,892 pcs in stock. This part is Active, ROHS3 Compliant, and delivers identical performance to the original SPMWHT541MP5WARRS5 specification.

Q: What is the impact of forward voltage difference between LM561B Plus and LM561C?

A: LM561C operates at 2.75V versus LM561B Plus at 2.95V—a 0.20V reduction per LED. In series-connected strings, this difference accumulates. For example, a 10-LED string would require 0.20V less supply voltage with LM561C. This reduces power dissipation and improves overall system efficiency. Circuit design must accommodate the lower voltage requirement; no other modifications are necessary.

Q: Can SPMWHT541MP5WARSS5 be used as a direct replacement?

A: Yes. SPMWHT541MP5WARSS5 is an LM561B Plus variant with identical electrical and optical specifications to SPMWHT541MP5WARRS5. It features marginally improved thermal resistance (14°C/W versus 15°C/W) and carries ROHS3 Compliant certification. It is classified as Active with 1,039 pcs inventory.

Q: What does "Not For New Designs" mean for SPMWHT541MP5WARRS5?

A: This designation indicates the part has reached end-of-life status and Samsung Semiconductor does not recommend its use in new product designs. Existing inventory (829 pcs) supports legacy production and field service. For new designs, select from Active alternatives: LM561B Plus variants (SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5, SPMWHT541MP5WARSS5) or LM561C variants (SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5).

Q: Are there any compliance differences between substitute parts?

A: All parts are RoHS compliant. SPMWHT541MP5WAR0S5, SPMWHT541MP5WARSS5, and SPMWHT541ML5XAR0S5 carry ROHS3 Compliant certification. Remaining variants carry RoHS Compliant certification. SPMWHT541MP5WARSS5 additionally lists REACH Unaffected status. Selection should align with customer compliance requirements and documentation standards.

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