SPMWHT541ML5XARGS5 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541ML5XARGS5 is a Samsung Semiconductor LM561C cool white LED (5000K) 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 a forward voltage of 2.75V and 213 lm/W efficiency. Due to its discontinued design status, equivalent substitute parts from active product lines are necessary for ongoing production and new applications requiring similar optical and electrical characteristics.

Key Parameters

Parameter	Value	Unit
Series	LM561C
Color / CCT	White, Cool / 5000K
Flux @ 25°C, 65mA	36 (35-37)	lm
Forward Voltage (Typ)	2.75	V
Test Current	65	mA
Maximum Current	200	mA
Lumens/Watt @ 65mA	213	lm/W
CRI	80
Viewing Angle	120	°
Package / Case	4-SMD, Flat Leads
Supplier Device Package	5630
Size	5.00 x 3.00	mm
Height (Max)	0.80	mm
Thermal Resistance	12	°C/W
Mounting Type	Surface Mount
MSL Rating	2A (4 Weeks)

Substitute Part Grouping Explanation

Substitute parts for SPMWHT541ML5XARGS5 are classified into two functional groups based on electrical and optical compatibility:

Group 1: LM561C Series Parametric Equivalents (Direct Substitutes)

Parts SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5, and SPMWHT541ML5XARUS5 are parametric equivalents within the LM561C series. These parts maintain identical optical output (36 lm @ 65mA), forward voltage (2.75V), maximum current rating (200mA), thermal resistance (12°C/W), and mechanical dimensions. All are packaged in 5630 format with 4-SMD flat leads. The primary differences are product status (Active vs. Not For New Designs) and RoHS compliance variants. These parts are interchangeable at the circuit level.

Group 2: LM561B Plus Series Functional Substitutes

Parts SPMWHT541MP5WARKS4, SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, and SPMWHT541MP5WARNS5 belong to the LM561B Plus series. These parts share the same 5000K color temperature, 120° viewing angle, 5630 package format, and 4-SMD flat lead configuration. However, they operate at a higher forward voltage (2.95V vs. 2.75V), deliver 36 lm output at 65mA test current, and have a lower maximum current rating (180mA vs. 200mA) and higher thermal resistance (15°C/W vs. 12°C/W). These parts are functionally compatible but require circuit verification for voltage and thermal performance.

Key Substitution Criteria:

Color and CCT (5000K cool white)
Optical output at test current (36 lm nominal)
Package format (5630, 4-SMD, flat leads)
Mechanical dimensions (5.00 x 3.00 x 0.80 mm)
Viewing angle (120°)
CRI (80)
Mounting type (Surface Mount)

Parameter Comparison

Part Number	Series	Product Status	Flux @ 65mA (lm)	Vf (V)	Max Current (mA)	Lumens/Watt	Thermal Resistance (°C/W)	Packaging	Inventory (Pcs)
SPMWHT541ML5XARGS5	LM561C	Not For New Designs	36	2.75	200	213	12	Tape & Reel	901
SPMWHT541ML5XAR0S5	LM561C	Active	36	2.75	200	201	12	Tape & Reel	921
SPMWHT541ML5XARKS5	LM561C	Active	36	2.75	200	201	12	Tape & Reel	820
SPMWHT541ML5XARMS5	LM561C	Active	36	2.75	200	201	12	Tape & Reel	972
SPMWHT541ML5XARUS5	LM561C	Active	36	2.75	200	201	12	Tape & Reel	954
SPMWHT541MP5WARKS4	LM561B Plus	Active	34	2.95	180	177	15	Cut Tape	73313
SPMWHT541MP5WAR0S5	LM561B Plus	Active	36	2.95	180	188	15	Tape & Reel	17892
SPMWHT541MP5WARKS5	LM561B Plus	Active	36	2.95	180	188	15	Tape & Reel	5400
SPMWHT541MP5WARMS5	LM561B Plus	Active	36	2.95	180	188	15	Tape & Reel	1069
SPMWHT541MP5WARNS5	LM561B Plus	Active	36	2.95	180	188	15	Tape & Reel	941

Engineering Selection Recommendations

For Direct Replacement (LM561C Series):

Select SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5, or SPMWHT541ML5XARUS5 when the original SPMWHT541ML5XARGS5 is no longer available. All four parts are Active product status and maintain identical electrical and optical specifications. SPMWHT541ML5XARKS5 and SPMWHT541ML5XARMS5 carry RoHS Compliant certification, while SPMWHT541ML5XAR0S5 and SPMWHT541ML5XARUS5 carry ROHS3 Compliant certification. All are packaged in Tape & Reel format. Selection among these four parts depends on RoHS compliance requirements and inventory availability.

For Functional Substitution (LM561B Plus Series):

The LM561B Plus series parts (SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5) are functionally compatible alternatives when LM561C series parts are unavailable. These parts deliver the same 36 lm optical output and maintain 5000K color temperature and 120° viewing angle. However, circuit design must accommodate the 0.20V higher forward voltage (2.95V vs. 2.75V), 20mA lower maximum current rating (180mA vs. 200mA), and 3°C/W higher thermal resistance. SPMWHT541MP5WAR0S5 offers the highest inventory (17,892 pcs) and ROHS3 compliance. SPMWHT541MP5WARKS4 is available in Cut Tape packaging with 73,313 pcs inventory but operates at 34 lm output and carries Active product status.

Compliance Considerations:

All substitute parts are RoHS compliant (either RoHS or ROHS3 variants). All carry MSL 2A (4 Weeks) moisture sensitivity rating. SPMWHT541ML5XARUS5 includes REACH Unaffected status. All parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541ML5XARKS5 directly replace SPMWHT541ML5XARGS5 without circuit modification?

A: Yes. SPMWHT541ML5XARKS5 is a parametric equivalent within the LM561C series with identical forward voltage (2.75V), optical output (36 lm @ 65mA), maximum current (200mA), and thermal resistance (12°C/W). No circuit modification is required.

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

A: LM561C and LM561B Plus are different LED series. LM561B Plus operates at 2.95V forward voltage versus 2.75V for LM561C, has a lower maximum current rating (180mA vs. 200mA), and higher thermal resistance (15°C/W vs. 12°C/W). Both deliver 36 lm output at 65mA test current and share the same 5000K color temperature and 120° viewing angle. LM561B Plus substitution requires circuit verification for voltage and thermal performance.

Q: Why is SPMWHT541MP5WARKS4 listed as a substitute if it delivers only 34 lm instead of 36 lm?

A: SPMWHT541MP5WARKS4 is included as a functional substitute because it operates within the same 5000K color temperature, 120° viewing angle, and 5630 package format. The 2 lm difference (34 lm vs. 36 lm) falls within typical LED manufacturing tolerance ranges. However, applications requiring exact 36 lm output should select SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, or SPMWHT541MP5WARNS5.

Q: What packaging formats are available for substitutes?

A: LM561C series substitutes (SPMWHT541ML5XAR0S5, SPMWHT541ML5XARKS5, SPMWHT541ML5XARMS5, SPMWHT541ML5XARUS5) are packaged in Tape & Reel format, matching the original SPMWHT541ML5XARGS5. LM561B Plus series substitutes are available in both Tape & Reel (SPMWHT541MP5WAR0S5, SPMWHT541MP5WARKS5, SPMWHT541MP5WARMS5, SPMWHT541MP5WARNS5) and Cut Tape (SPMWHT541MP5WARKS4) formats.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either RoHS Compliant or ROHS3 Compliant certification. SPMWHT541ML5XARKS5 and SPMWHT541ML5XARMS5 carry RoHS Compliant status. SPMWHT541ML5XAR0S5 and SPMWHT541ML5XARUS5 carry ROHS3 Compliant status. All LM561B Plus series parts carry ROHS3 Compliant status.

Q: Which substitute has the highest inventory availability?

A: SPMWHT541MP5WARKS4 (LM561B Plus, Cut Tape) has the highest inventory with 73,313 pcs. Among Tape & Reel packaged parts, SPMWHT541MP5WAR0S5 (LM561B Plus) has 17,892 pcs available. Among LM561C series direct equivalents, SPMWHT541ML5XARMS5 has 972 pcs available.

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

A: LM561C series parts have 12°C/W thermal resistance, while LM561B Plus series parts have 15°C/W thermal resistance. This 3°C/W difference means LM561B Plus parts will operate at higher junction temperatures under identical thermal conditions. Applications with tight thermal budgets should prioritize LM561C series substitutes.

Q: Can I use SPMWHT541MP5WARMS5 in a design originally specified for SPMWHT541ML5XARGS5?

A: SPMWHT541MP5WARMS5 is functionally compatible but requires circuit verification. Both parts deliver 36 lm at 65mA and maintain 5000K color temperature. However, the 0.20V higher forward voltage (2.95V vs. 2.75V) and 20mA lower maximum current rating (180mA vs. 200mA) must be accommodated in the power supply and current limiting circuit design.

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