SPMWHT541MD5WAUMS3 LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WAUMS3 is a Samsung Semiconductor LM561B series warm white LED (3500K) designed for surface mount applications. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing production and procurement requirements. The LED delivers 30 lumens at 65mA with a forward voltage of 2.95V and is housed in a 5630 package format with exposed pad configuration.

Key Parameters

Parameter	Value	Unit
Color Temperature (CCT)	3500K	Kelvin
Luminous Flux @ 25°C	30	lm
Test Current	65	mA
Forward Voltage (Typ)	2.95	V
Color Rendering Index	80	CRI
Viewing Angle	120	degrees
Package Type	5630 (4-SMD)	-
Physical Dimensions	5.00 x 3.00	mm
Maximum Current	150	mA
Thermal Resistance	16	°C/W

Substitute Part Grouping Explanation

Substitution of the SPMWHT541MD5WAUMS3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Color temperature: 3500K warm white
Forward voltage: 2.95V typical
Color rendering index: 80 CRI
Viewing angle: 120°
Package format: 5630 (4-SMD)
Physical dimensions: 5.00mm x 3.00mm
Test current: 65mA nominal operation
Mounting type: Surface mount

The SPMWHT541MP5WAUMS4 qualifies as a direct substitute based on identical alignment across all critical parameters. Both components operate at the same electrical specifications and occupy the same physical footprint, enabling direct replacement in existing circuit designs and PCB layouts.

Parameter Comparison

Parameter	SPMWHT541MD5WAUMS3 (Main)	SPMWHT541MP5WAUMS4 (Substitute)
Manufacturer	Samsung Semiconductor, Inc.	Samsung Semiconductor, Inc.
Series	LM561B	LM561B Plus
Product Status	Obsolete	Active
Color / CCT	White, Warm / 3500K	White, Warm / 3500K
Luminous Flux @ 25°C	30 lm (29-31 lm)	32 lm (31-33 lm)
Test Current	65 mA	65 mA
Forward Voltage (Typ)	2.95 V	2.95 V
Lumens/Watt @ Test Current	156 lm/W	167 lm/W
CRI	80	80
Maximum Current	150 mA	180 mA
Viewing Angle	120°	120°
Package / Case	4-SMD, Flat Lead Exposed Pad	4-SMD, Flat Leads
Supplier Device Package	5630	5630
Size / Dimension	5.00 x 3.00 mm	5.00 x 3.00 mm
Height - Seated (Max)	0.90 mm	0.80 mm
Thermal Resistance	16 °C/W	16 °C/W
RoHS Status	RoHS Compliant	ROHS3 Compliant
MSL Rating	2A (4 Weeks)	2A (4 Weeks)
ECCN	EAR99	EAR99
HTSUS Code	8541.41.0000	8541.41.0000

Engineering Selection Recommendations

The SPMWHT541MP5WAUMS4 is the appropriate substitute for the obsolete SPMWHT541MD5WAUMS3. Selection is based on the following factors:

Product Status: The main part is classified as obsolete, while the substitute maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance Certifications: Both components carry equivalent regulatory compliance. The substitute achieves ROHS3 compliance, representing an advancement over the RoHS Compliant status of the main part. Both components are REACH unaffected and carry EAR99 ECCN classification.

Electrical Equivalence: Identical forward voltage (2.95V), test current (65mA), color temperature (3500K), CRI (80), and viewing angle (120°) ensure functional interchangeability in existing circuit designs without modification to drive electronics or optical design.

Physical Compatibility: Both components occupy identical footprints (5.00mm x 3.00mm) within the 5630 package format. The substitute exhibits a marginal height reduction (0.80mm versus 0.90mm), which presents no clearance concerns in standard surface mount applications.

Performance Enhancement: The substitute delivers improved luminous efficacy (167 lm/W versus 156 lm/W) and higher maximum current rating (180mA versus 150mA), providing design flexibility for future optimization without requiring component replacement.

Frequently Asked Questions (FAQ)

Q: Can SPMWHT541MP5WAUMS4 be used as a direct replacement for SPMWHT541MD5WAUMS3 without PCB modification?

A: Yes. Both components share identical electrical specifications (2.95V forward voltage, 65mA test current, 3500K color temperature) and physical footprints (5.00mm x 3.00mm). Direct substitution on existing PCBs is supported without circuit design changes.

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

A: Both designations refer to the same 5630 package format with identical mechanical and thermal characteristics. The terminology variation reflects Samsung's product documentation evolution between the obsolete and active series. Thermal resistance remains 16°C/W for both variants.

Q: Does the height difference (0.90mm versus 0.80mm) affect assembly or clearance?

A: No. The substitute's reduced height (0.80mm) presents no compatibility issues. Standard surface mount assembly processes and PCB clearance specifications accommodate both dimensions without modification.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: Both components carry identical MSL 2A (4 Weeks) ratings. Storage, handling, and reflow procedures remain unchanged between the main part and substitute.

Q: Why does the substitute show higher luminous flux (32 lm versus 30 lm) at identical test current?

A: The LM561B Plus series represents an improved generation within the same product family, delivering enhanced luminous efficacy (167 lm/W versus 156 lm/W) through manufacturing process refinements. This performance improvement is transparent to circuit operation at specified test current.

Q: What is the significance of the higher maximum current rating (180mA versus 150mA)?

A: The substitute's increased maximum current rating provides additional design margin and enables operation at higher drive currents if future application requirements demand increased brightness. Existing designs operating at 65mA test current are unaffected.

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