SPMWHT541ML5XAQGS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541ML5XAQGS5 is a Samsung Semiconductor LM561C cool white LED (5700K) in 5630 surface mount package format. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. The LM561C series delivers 36 lumens at 65mA test current with 201 lm/W efficiency and 80 CRI, suitable for general illumination applications requiring cool white color temperature.

Due to its discontinued design status, equivalent and substitute parts from active product lines are necessary for ongoing production requirements and design continuity.

Key Parameters

Parameter	Value	Specification Range
Series	LM561C	LED series designation
Color / CCT	White, Cool / 5700K	Color temperature specification
Flux @ 25°C, 65mA	36 lm	35–37 lm range
Forward Voltage (Vf)	2.75V	Typical at 65mA
Test Current	65mA	Standard test condition
Maximum Current	200mA	Absolute maximum rating
Lumens/Watt	201 lm/W	Efficiency at test current
CRI	80	Color Rendering Index
Viewing Angle	120°	Half-angle
Package	4-SMD, Flat Leads / 5630	Surface mount configuration
Dimensions	5.00mm L × 3.00mm W × 0.80mm H	Physical footprint
Thermal Resistance	12°C/W	Package thermal performance
RoHS Status	RoHS Compliant	Environmental compliance
MSL Rating	2A (4 Weeks)	Moisture sensitivity level

Substitute Part Grouping Explanation

Substitution of the SPMWHT541ML5XAQGS5 is determined by the following critical parameters:

Primary Equivalence Criteria:

Color temperature (5700K or 5000K cool white)
Flux output range (35–37 lm at 65mA test current)
Forward voltage compatibility (2.75V or 2.95V)
Package format (4-SMD, Flat Leads, 5630)
Physical dimensions (5.00mm × 3.00mm × 0.80mm)
Viewing angle (120°)
CRI (80)

Substitution Categories:

Parametric Equivalents (LM561C Series): Parts with identical electrical and optical performance to the main part. These include SPMWHT541ML5XAQ0S5, SPMWHT541ML5XAQKS5, SPMWHT541ML5XAQMS5, SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, and SPMWHT541ML5XARMS5. All maintain 2.75V Vf, 201 lm/W efficiency, and 12°C/W thermal resistance. Differences exist only in color temperature (5700K vs. 5000K) and product status (Active vs. Not For New Designs).
Series Upgrade Substitutes (LM561B Plus): Parts from the LM561B Plus series (SPMWHT541MP5WAQKS4, SPMWHT541MP5WAQ0S5, SPMWHT541MP5WAQKS5, SPMWHT541MP5WAQMS5) operate at higher forward voltage (2.95V) with slightly lower efficiency (177–188 lm/W) but maintain 36 lm flux output and 5700K color temperature. These are Active status parts suitable for new designs.

All substitute parts share identical package geometry, mounting type, MSL rating, and compliance certifications, enabling direct mechanical and thermal compatibility.

Parameter Comparison

Part Number	Series	Status	CCT (K)	Vf (V)	Flux @ 65mA (lm)	lm/W	Max Current (mA)	Thermal Resistance (°C/W)
SPMWHT541ML5XAQGS5	LM561C	Not For New Designs	5700	2.75	36	201	200	12
SPMWHT541ML5XAQ0S5	LM561C	Active	5700	2.75	36	201	200	12
SPMWHT541ML5XAQKS5	LM561C	Active	5700	2.75	36	201	200	12
SPMWHT541ML5XAQMS5	LM561C	Active	5700	2.75	36	201	200	12
SPMWHT541ML5XAR0S5	LM561C	Active	5000	2.75	36	201	200	12
SPMWHT541ML5XARKS5	LM561C	Active	5000	2.75	36	201	200	12
SPMWHT541ML5XARMS5	LM561C	Active	5000	2.75	36	201	200	12
SPMWHT541MP5WAQKS4	LM561B Plus	Active	5700	2.95	34	177	180	15
SPMWHT541MP5WAQ0S5	LM561B Plus	Active	5700	2.95	36	188	180	15
SPMWHT541MP5WAQKS5	LM561B Plus	Active	5700	2.95	36	188	180	15
SPMWHT541MP5WAQMS5	LM561B Plus	Active	5700	2.95	36	188	180	15

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select SPMWHT541ML5XAQ0S5, SPMWHT541ML5XAQKS5, or SPMWHT541ML5XAQMS5 when 5700K color temperature is required. These LM561C parts maintain identical forward voltage (2.75V), flux output (36 lm), efficiency (201 lm/W), and thermal characteristics (12°C/W) to the main part. All three are Active status, ensuring long-term availability and compliance with RoHS standards.

For 5000K Color Temperature Requirement:

Select SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, or SPMWHT541ML5XARMS5. These maintain all electrical and thermal parameters of the 5700K variants while shifting color temperature to 5000K. All are Active status with RoHS3 compliance (SPMWHT541ML5XAR0S5) or RoHS compliance.

For Series Upgrade (LM561B Plus):

Select SPMWHT541MP5WAQ0S5, SPMWHT541MP5WAQKS5, or SPMWHT541MP5WAQMS5 when higher forward voltage tolerance is acceptable. These LM561B Plus parts operate at 2.95V (vs. 2.75V) with slightly reduced efficiency (188 lm/W vs. 201 lm/W) but deliver 36 lm flux at 5700K. Maximum current rating is 180mA (vs. 200mA) and thermal resistance is 15°C/W (vs. 12°C/W). All are Active status suitable for new designs.

SPMWHT541MP5WAQKS4 is also available but delivers 34 lm flux (lower than specification range) and is therefore not recommended as a primary substitute.

All recommended substitutes maintain identical package geometry (5630, 4-SMD Flat Leads), MSL rating (2A, 4 Weeks), and environmental compliance, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541ML5XAQGS5 be replaced with LM561B Plus series parts?

A: Yes. LM561B Plus parts (SPMWHT541MP5WAQ0S5, SPMWHT541MP5WAQKS5, SPMWHT541MP5WAQMS5) are compatible substitutes. The primary difference is forward voltage: LM561B Plus operates at 2.95V versus 2.75V for LM561C. Circuit designs must accommodate this 0.20V increase. Efficiency is slightly lower (188 lm/W vs. 201 lm/W), and maximum current rating is reduced to 180mA. Thermal resistance increases to 15°C/W. All other parameters, including flux output (36 lm), color temperature (5700K), package format, and dimensions, remain compatible.

Q: What is the difference between 5700K and 5000K variants?

A: Color temperature is the only electrical difference. SPMWHT541ML5XAQ0S5, SPMWHT541ML5XAQKS5, and SPMWHT541ML5XAQMS5 deliver 5700K (cooler, more blue-shifted white light). SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, and SPMWHT541ML5XARMS5 deliver 5000K (warmer white light). All other parameters—forward voltage (2.75V), flux (36 lm), efficiency (201 lm/W), maximum current (200mA), and thermal resistance (12°C/W)—are identical. Selection depends on application color temperature requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS compliant. SPMWHT541ML5XAR0S5 carries ROHS3 certification. All others carry standard RoHS Compliant status. All parts meet environmental compliance requirements for EU and global markets.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, mechanically and thermally. All substitute parts use identical 5630 package format (4-SMD, Flat Leads) with dimensions 5.00mm × 3.00mm × 0.80mm. PCB footprints are identical. However, circuit designs must account for forward voltage differences: LM561C parts require 2.75V, while LM561B Plus parts require 2.95V. Current-limiting resistor values or driver circuits may require adjustment. Thermal management remains compatible due to identical or similar thermal resistance ratings.

Q: Why is SPMWHT541ML5XAQGS5 marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and Samsung Semiconductor is discontinuing production. Existing inventory remains available, but new designs should transition to Active status alternatives such as SPMWHT541ML5XAQ0S5, SPMWHT541ML5XAQKS5, SPMWHT541ML5XAQMS5, or LM561B Plus variants to ensure long-term supply continuity and design support.

Q: What is the MSL rating and why does it matter?

A: All parts carry MSL 2A (4 Weeks) rating. This indicates the component can be exposed to ambient conditions of 30°C / 85% relative humidity for up to 4 weeks before soldering. After 4 weeks, the part must be baked at 125°C for 24 hours to remove absorbed moisture. This specification is critical for manufacturing planning and storage protocols to prevent solder joint defects during reflow.

Q: Are there inventory differences between substitute parts?

A: Yes. Inventory levels vary: SPMWHT541ML5XAQ0S5 (1083 pcs), SPMWHT541ML5XAQKS5 (927 pcs), SPMWHT541ML5XAQMS5 (951 pcs), SPMWHT541ML5XAR0S5 (921 pcs), SPMWHT541ML5XARKS5 (820 pcs), SPMWHT541ML5XARMS5 (972 pcs), SPMWHT541MP5WAQ0S5 (1014 pcs), SPMWHT541MP5WAQKS5 (860 pcs), SPMWHT541MP5WAQMS5 (1012 pcs). Inventory should be verified at time of procurement to confirm availability for production quantities.

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