SPMWHT541MD5WARMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WARMS3 is a Samsung Semiconductor LM561B series cool white LED (5000K) designed for surface mount applications. This component features a 5630 package format with 4-SMD flat lead exposed pad configuration, delivering 32 lumens at 65mA test current with 2.95V forward voltage. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and replacement applications.

Key Parameters

Parameter	Value	Unit
Series	LM561B	—
Color / CCT	White, Cool / 5000K	—
Flux @ 25°C, 65mA	32 (31–33)	lm
Forward Voltage (Typ)	2.95	V
Test Current	65	mA
Maximum Current	150	mA
Lumens/Watt @ Test Current	167	lm/W
CRI	80	—
Viewing Angle	120	°
Package / Case	4-SMD, Flat Lead Exposed Pad	—
Supplier Device Package	5630	—
Size	5.00 × 3.00	mm
Height (Max)	0.90	mm
Thermal Resistance	16	°C/W
RoHS Status	RoHS Compliant	—
MSL	2A (4 Weeks)	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WARMS3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Color and correlated color temperature (CCT): White, Cool 5000K
Forward voltage (Vf): 2.95V nominal
Test current: 65mA
Viewing angle: 120°
Package format: 4-SMD, 5630 footprint
Physical dimensions: 5.00mm × 3.00mm
CRI: 80 minimum

Allowable Variation Parameters:

Luminous flux: Substitutes must maintain equivalent or superior lumen output at rated test current
Lumens/Watt efficiency: Higher efficiency acceptable
Maximum current rating: May exceed original specification
Thermal resistance: Lower values acceptable (improved thermal performance)
Height: Slight reduction acceptable within assembly constraints
RoHS compliance: Must meet or exceed original certification level

The SPMWHT541MP5WARMS4 qualifies as a direct substitute based on identical electrical characteristics (2.95V, 65mA, 5000K, 120° viewing angle) and compatible 5630 package geometry, with improved performance metrics and active product status.

Parameter Comparison

Parameter	SPMWHT541MD5WARMS3 (Main)	SPMWHT541MP5WARMS4 (Substitute)	Compatibility
Manufacturer	Samsung Semiconductor, Inc.	Samsung Semiconductor, Inc.	Identical
Series	LM561B	LM561B Plus	Compatible Family
Color / CCT	White, Cool / 5000K	White, Cool / 5000K	Identical
Flux @ 25°C, 65mA	32 lm (31–33)	34 lm (33–35)	Enhanced (+6.3%)
Forward Voltage (Typ)	2.95V	2.95V	Identical
Test Current	65mA	65mA	Identical
Maximum Current	150mA	180mA	Enhanced (+20%)
Lumens/Watt @ Test Current	167 lm/W	177 lm/W	Enhanced (+6.0%)
CRI	80	80	Identical
Viewing Angle	120°	120°	Identical
Package / Case	4-SMD, Flat Lead Exposed Pad	4-SMD, Flat Leads	Compatible
Supplier Device Package	5630	5630	Identical
Size	5.00 × 3.00 mm	5.00 × 3.00 mm	Identical
Height (Max)	0.90mm	0.80mm	Reduced (−0.10mm)
Thermal Resistance	16°C/W	15°C/W	Improved (−1°C/W)
RoHS Status	RoHS Compliant	ROHS3 Compliant	Enhanced Compliance
MSL	2A (4 Weeks)	2A (4 Weeks)	Identical
Product Status	Obsolete	Active	Active Alternative

Engineering Selection Recommendations

Primary Substitute: SPMWHT541MP5WARMS4

The SPMWHT541MP5WARMS4 is the qualified substitute for SPMWHT541MD5WARMS3 applications. Selection is based on the following engineering criteria:

Electrical Compatibility:

Identical forward voltage (2.95V) and test current (65mA) ensure direct circuit compatibility without modification
Identical color temperature (5000K) and CRI (80) maintain optical performance specifications
Enhanced maximum current rating (180mA vs. 150mA) provides additional operational margin

Mechanical Compatibility:

Identical 5630 package footprint and 5.00 × 3.00mm dimensions ensure PCB layout compatibility
Reduced height (0.80mm vs. 0.90mm) presents no assembly constraint; clearance is improved
4-SMD configuration maintains reflow soldering compatibility

Performance Enhancement:

Luminous flux increased to 34 lm (vs. 32 lm), representing 6.3% improvement at identical test current
Efficiency improved to 177 lm/W (vs. 167 lm/W), representing 6.0% gain
Thermal resistance reduced to 15°C/W (vs. 16°C/W), improving heat dissipation

Compliance and Availability:

ROHS3 compliance exceeds original RoHS specification
Active product status ensures long-term supply availability (19,382 pcs in stock vs. 994 pcs for obsolete part)
Identical MSL rating (2A, 4 Weeks) maintains moisture handling requirements

Application Suitability: The SPMWHT541MP5WARMS4 is suitable for direct replacement in all applications where SPMWHT541MD5WARMS3 was specified, with no circuit redesign required. The performance enhancements and improved thermal characteristics make this substitute appropriate for designs requiring extended operational life or higher reliability margins.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WARMS4 be used as a direct drop-in replacement for SPMWHT541MD5WARMS3?

A: Yes. Both components share identical electrical specifications (2.95V forward voltage, 65mA test current, 5000K color temperature) and compatible 5630 package geometry. No circuit modifications are required. The substitute offers improved performance with higher luminous flux (34 lm vs. 32 lm) and efficiency (177 lm/W vs. 167 lm/W).

Q: Are there any PCB layout considerations when substituting SPMWHT541MP5WARMS4 for SPMWHT541MD5WARMS3?

A: No layout changes are necessary. Both components have identical footprints (5.00 × 3.00mm) and 4-SMD pad configurations. The substitute is 0.10mm shorter (0.80mm vs. 0.90mm), which improves clearance and presents no assembly issues.

Q: What is the difference between "Flat Lead Exposed Pad" and "Flat Leads" package descriptions?

A: Both configurations are compatible 4-SMD 5630 packages. The exposed pad variant (SPMWHT541MD5WARMS3) includes a thermal pad for enhanced heat dissipation. The flat leads variant (SPMWHT541MP5WARMS4) achieves equivalent thermal performance through improved package design (15°C/W vs. 16°C/W thermal resistance). Both are suitable for standard reflow soldering processes.

Q: Why is SPMWHT541MD5WARMS3 marked as obsolete?

A: The LM561B series has been superseded by the LM561B Plus series (SPMWHT541MP5WARMS4), which offers superior performance and efficiency. Samsung has transitioned production to the newer variant. The substitute maintains full backward compatibility while providing enhanced specifications.

Q: Can SPMWHT541MP5WARMS4 operate at higher currents than SPMWHT541MD5WARMS3?

A: Yes. The substitute has a maximum current rating of 180mA compared to 150mA for the original part. However, both components are specified for 65mA test current. Operation at higher currents requires thermal management verification for the specific application.

Q: Are moisture sensitivity levels identical between the two parts?

A: Yes. Both components have MSL rating 2A (4 Weeks), indicating identical moisture handling and storage requirements. Standard dry-pack storage and reflow procedures apply to both parts.

Q: What is the inventory status difference between these parts?

A: SPMWHT541MD5WARMS3 (obsolete) has 994 pcs available. SPMWHT541MP5WARMS4 (active) has 19,382 pcs in stock. The active substitute ensures long-term supply availability for production and replacement applications.

Q: Do both parts meet the same RoHS compliance standards?

A: SPMWHT541MD5WARMS3 meets RoHS Compliant specification. SPMWHT541MP5WARMS4 meets ROHS3 Compliant specification, which represents enhanced compliance with current regulatory requirements. Both are suitable for applications requiring RoHS certification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message