SPMWHT541MP5WAQKS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MP5WAQKS5 is a Samsung Semiconductor LM561B Plus white LED in cool 5700K color temperature, packaged as a 4-SMD surface mount component with 5630 form factor dimensions. This part operates at 2.95V forward voltage with 65mA test current, delivering 36 lumens at 188 lm/W efficiency and 80 CRI. The component is Active status and RoHS Compliant, suitable for general illumination applications requiring cool white spectral output.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative color temperature specifications are required for system redesign, or when inventory constraints necessitate selection from qualified alternatives within the same product family.

Key Parameters

Parameter	Value	Unit	Specification Range
Series	LM561B Plus	—	Samsung LM561 family
Color Temperature (CCT)	5700K	K	Cool White
Flux @ 25°C, 65mA	36	lm	35–37 lm
Forward Voltage (Vf)	2.95	V	Typical
Test Current	65	mA	Standard
Maximum Current	180	mA	Absolute Maximum
Viewing Angle	120	°	Half-angle
Package / Case	4-SMD, Flat Leads	—	5630 form factor
Dimensions	5.00 × 3.00 × 0.80	mm	L × W × H (max)
Thermal Resistance	15	°C/W	Package junction-to-ambient
CRI	80	—	Color Rendering Index
Lumens/Watt	188	lm/W	@ 65mA test current
Mounting Type	Surface Mount	—	SMD
Packaging	Tape & Reel	—	TR
RoHS Status	RoHS Compliant	—	Directive 2011/65/EU
MSL Rating	2A	—	4 weeks @ 30°C/60% RH

Substitute Part Grouping Explanation

Substitution eligibility for SPMWHT541MP5WAQKS5 is determined by the following critical parameters:

Mandatory Matching Parameters:

Package / Case: 4-SMD, Flat Leads (5630 form factor)
Dimensions: 5.00mm L × 3.00mm W × 0.80mm H (max)
Mounting Type: Surface Mount
Viewing Angle: 120°
Test Current: 65mA
CRI: 80
Manufacturer: Samsung Semiconductor, Inc.
Base Product Number: SPMWHT541

Allowable Variation Parameters:

Color Temperature (CCT): 5000K or 5700K (cool white range)
Forward Voltage (Vf): 2.75V to 2.95V (within LM561 series tolerance)
Series: LM561B Plus or LM561C (same product family)
Thermal Resistance: 12–15°C/W (package design variation)
Maximum Current: 180–200mA (series-dependent rating)
Lumens/Watt: 188–201 lm/W (efficiency variation by series)
RoHS Status: RoHS Compliant or ROHS3 Compliant (both acceptable)

Three substitute parts meet these criteria and are qualified for direct replacement in circuit designs accommodating the specified parameter ranges.

Parameter Comparison

Parameter	SPMWHT541MP5WAQKS5 (Main)	SPMWHT541ML5XAR0S5	SPMWHT541MP5WAR0S5	SPMWHT541MP5WARMS5
Series	LM561B Plus	LM561C	LM561B Plus	LM561B Plus
Color Temperature (K)	5700K	5000K	5000K	5000K
Flux @ 25°C, 65mA (lm)	36 (35–37)	36 (35–37)	36 (35–37)	36 (35–37)
Forward Voltage (V)	2.95	2.75	2.95	2.95
Test Current (mA)	65	65	65	65
Maximum Current (mA)	180	200	180	180
Viewing Angle (°)	120	120	120	120
Package / Case	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads	4-SMD, Flat Leads
Dimensions (mm)	5.00 × 3.00 × 0.80	5.00 × 3.00 × 0.80	5.00 × 3.00 × 0.80	5.00 × 3.00 × 0.80
Thermal Resistance (°C/W)	15	12	15	15
CRI	80	80	80	80
Lumens/Watt @ 65mA	188	201	188	188
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	2A (4 weeks)	2A (4 weeks)	2A (4 weeks)	2A (4 weeks)
Inventory (Pcs)	860	921	17892	1069

Engineering Selection Recommendations

SPMWHT541MP5WAR0S5 is the primary substitute option. This part maintains identical electrical characteristics to the main part (LM561B Plus series, 2.95V Vf, 180mA max current, 188 lm/W efficiency) with the only difference being color temperature specification at 5000K instead of 5700K. ROHS3 compliance provides enhanced regulatory alignment. Inventory availability is highest at 17,892 pieces, ensuring supply continuity. Forward voltage and thermal characteristics are identical, requiring no circuit redesign.

SPMWHT541MP5WARMS5 is a secondary substitute with identical electrical and thermal performance to the main part. This option maintains 5000K color temperature and RoHS Compliant status. Inventory is limited at 1,069 pieces. Selection is appropriate when ROHS3 certification is not required and 5000K spectral output is acceptable.

SPMWHT541ML5XAR0S5 is a tertiary substitute from the LM561C series. This part operates at lower forward voltage (2.75V vs. 2.95V) and higher maximum current rating (200mA vs. 180mA), with superior efficiency at 201 lm/W. Thermal resistance is improved at 12°C/W. ROHS3 compliance is provided. Color temperature is 5000K. This option is suitable for designs requiring enhanced thermal performance or higher current headroom, though circuit voltage and current parameters must be verified for compatibility.

All three substitutes are Active status products from Samsung Semiconductor, Inc., with identical package dimensions, mounting type, and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WAR0S5 be used as a direct replacement for SPMWHT541MP5WAQKS5?

A: Yes. Both parts are LM561B Plus series with identical forward voltage (2.95V), test current (65mA), maximum current (180mA), thermal resistance (15°C/W), and package dimensions. The only difference is color temperature: 5000K versus 5700K. Direct PCB substitution is possible without circuit modification if the 5000K spectral output is acceptable for the application.

Q: What is the difference between SPMWHT541ML5XAR0S5 and the other substitutes?

A: SPMWHT541ML5XAR0S5 belongs to the LM561C series rather than LM561B Plus. It operates at lower forward voltage (2.75V), higher maximum current (200mA), and superior efficiency (201 lm/W vs. 188 lm/W). Thermal resistance is better at 12°C/W. These differences require verification that the circuit can accommodate 2.75V forward voltage and that the improved thermal characteristics do not conflict with thermal management design.

Q: Are all substitutes mechanically compatible with the original part?

A: Yes. All four parts share identical package specifications: 4-SMD, Flat Leads, 5630 form factor, dimensions 5.00mm × 3.00mm × 0.80mm maximum height. PCB footprints and reflow soldering profiles are identical.

Q: What is the significance of RoHS Compliant versus ROHS3 Compliant?

A: Both certifications indicate compliance with hazardous substance restrictions. ROHS3 Compliant refers to Directive 2011/65/EU as amended, representing the current regulatory standard. RoHS Compliant indicates compliance with the original directive. Both are acceptable for most applications; ROHS3 provides enhanced regulatory alignment with current EU standards.

Q: Which substitute should be selected for maximum inventory availability?

A: SPMWHT541MP5WAR0S5 has the highest inventory at 17,892 pieces. This part maintains all electrical characteristics of the main part except color temperature (5000K vs. 5700K) and provides ROHS3 compliance.

Q: Can SPMWHT541ML5XAR0S5 be used in applications requiring 2.95V forward voltage?

A: No. SPMWHT541ML5XAR0S5 operates at 2.75V typical forward voltage, which is 0.20V lower than the main part and other LM561B Plus substitutes. Circuit voltage and current source design must be verified to confirm compatibility with this lower voltage specification before substitution.

Q: What is the impact of thermal resistance differences between substitutes?

A: The main part and SPMWHT541MP5WAR0S5 and SPMWHT541MP5WARMS5 have thermal resistance of 15°C/W. SPMWHT541ML5XAR0S5 has 12°C/W, indicating superior heat dissipation from the LED junction. Lower thermal resistance results in lower junction temperature at equivalent ambient conditions and current levels. This is beneficial for thermal management but does not require circuit modification.

Q: Are all substitutes available in Tape & Reel packaging?

A: Yes. All four parts are supplied in Tape & Reel (TR) packaging with MSL rating 2A (4 weeks at 30°C/60% RH). Moisture sensitivity handling and storage requirements are identical.

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