SPMWHT541MD5WAUMSD LED Equivalent & Substitute Parts

Part Overview

The SPMWHT541MD5WAUMSD is a Samsung Semiconductor LM561B series warm white LED designed for surface mount applications. This component operates at 3500K color temperature with a forward voltage of 2.95V and test current of 65mA, delivering 33 lumens at 172 lm/W efficiency. The device features a 4-SMD package with flat lead exposed pad configuration in a 5630 form factor.

This part carries a "Not For New Designs" product status, indicating Samsung has transitioned this model to end-of-life. Identifying equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this LED specification remains functionally required.

Key Parameters

Parameter	Value	Unit
Color / CCT	White, Warm / 3500K	—
Forward Voltage (Typ)	2.95	V
Test Current	65	mA
Luminous Flux @ 25°C	33	lm
Lumens per Watt	172	lm/W
CRI (Color Rendering Index)	80	—
Maximum Current	150	mA
Viewing Angle	120	°
Package Type	4-SMD, Flat Lead Exposed Pad	—
Supplier Package	5630	—
Dimensions	5.00 × 3.00	mm
Height (Max)	0.90	mm
Thermal Resistance	16	°C/W
RoHS Status	RoHS Compliant	—
MSL Rating	2A (4 Weeks)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SPMWHT541MD5WAUMSD is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

Color and CCT: White, Warm 3500K
Forward Voltage (Typ): 2.95V
Test Current: 65mA
Viewing Angle: 120°
Package Type: 4-SMD configuration
Supplier Package: 5630 form factor
Mounting Type: Surface Mount
Dimensions: 5.00mm × 3.00mm

Allowable Variation Parameters:

Luminous Flux: Range 31–35 lm at 25°C
Lumens per Watt: Efficiency within product line tolerance
Maximum Current: May exceed 150mA in newer variants
Height (Seated): Variation within 0.80–0.90mm acceptable for PCB assembly
Thermal Resistance: Minor improvements acceptable (15–16°C/W)
Product Status: Active status preferred for ongoing availability
RoHS Compliance: ROHS3 acceptable as upgrade from RoHS Compliant

The SPMWHT541MP5WAU0S5 qualifies as a direct substitute based on these criteria, representing an active product variant within the LM561B Plus series that maintains electrical and mechanical compatibility.

Parameter Comparison

Parameter	SPMWHT541MD5WAUMSD (Main)	SPMWHT541MP5WAU0S5 (Substitute)	Compatibility
Series	LM561B	LM561B Plus	Compatible
Color / CCT	White, Warm / 3500K	White, Warm / 3500K	Identical
Forward Voltage (Typ)	2.95V	2.95V	Identical
Test Current	65mA	65mA	Identical
Luminous Flux @ 25°C	33 lm (31–35 lm)	34 lm (33–35 lm)	Within Range
Lumens per Watt	172 lm/W	177 lm/W	Improved
CRI	80	80	Identical
Maximum Current	150mA	180mA	Higher Rating
Viewing Angle	120°	120°	Identical
Package Type	4-SMD, Flat Lead Exposed Pad	4-SMD, Flat Leads	Compatible
Supplier Package	5630	5630	Identical
Dimensions	5.00 × 3.00 mm	5.00 × 3.00 mm	Identical
Height (Max)	0.90mm	0.80mm	Lower Profile
Thermal Resistance	16°C/W	15°C/W	Improved
RoHS Status	RoHS Compliant	ROHS3 Compliant	Enhanced
Product Status	Not For New Designs	Active	Preferred

Engineering Selection Recommendations

Primary Substitute: SPMWHT541MP5WAU0S5

The SPMWHT541MP5WAU0S5 is the recommended substitute for the SPMWHT541MD5WAUMSD based on the following engineering criteria:

Compliance and Status: The substitute carries Active product status, ensuring continued availability and manufacturing support. It meets ROHS3 compliance, representing an enhanced environmental standard compared to the main part's RoHS Compliant designation. Both components maintain identical MSL 2A ratings and equivalent ECCN/HTSUS classifications.

Electrical Compatibility: Forward voltage, test current, color temperature, and CRI are identical across both parts. The substitute delivers 34 lumens versus 33 lumens in the main part, both within the specified 31–35 lm tolerance band. The improved efficiency rating of 177 lm/W versus 172 lm/W reflects manufacturing advances within the LM561B Plus series while maintaining functional equivalence.

Mechanical Compatibility: Both components share identical 5630 package dimensions (5.00 × 3.00 mm) and 120° viewing angle. The substitute's reduced height of 0.80mm versus 0.90mm provides improved PCB assembly clearance without affecting electrical performance. The 4-SMD configuration remains compatible with existing pick-and-place tooling and reflow profiles.

Thermal Performance: The substitute's 15°C/W thermal resistance represents a 6% improvement over the main part's 16°C/W rating, providing enhanced heat dissipation in thermal-constrained applications.

Selection Basis: This substitution is valid for direct replacement in existing designs, production continuity, and maintenance applications where the SPMWHT541MD5WAUMSD specification is required. The substitute's active status and enhanced compliance profile make it the preferred choice for new procurement.

Frequently Asked Questions (FAQ)

Q: Can the SPMWHT541MP5WAU0S5 be used as a direct drop-in replacement for the SPMWHT541MD5WAUMSD?

A: Yes. Both components share identical electrical specifications (2.95V forward voltage, 65mA test current, 3500K color temperature, 80 CRI) and mechanical dimensions (5.00 × 3.00 mm, 5630 package, 4-SMD configuration). The substitute is compatible with existing PCB layouts, solder profiles, and circuit designs without modification.

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

A: Both designations refer to 4-SMD surface mount configurations with identical external dimensions and lead pitch. The terminology variation reflects different manufacturing documentation standards between product generations. Functional and mechanical compatibility is maintained.

Q: Why is the main part marked "Not For New Designs"?

A: This designation indicates Samsung has transitioned the SPMWHT541MD5WAUMSD to end-of-life status. The SPMWHT541MP5WAU0S5 represents the active successor within the LM561B product family, offering equivalent performance with enhanced compliance and availability.

Q: Are there differences in thermal performance between these parts?

A: The substitute features a 15°C/W thermal resistance compared to 16°C/W in the main part. This 1°C/W improvement provides better heat dissipation. The substitute's reduced height (0.80mm vs. 0.90mm) also facilitates improved thermal coupling to PCB copper layers in high-density layouts.

Q: Do both parts have the same maximum current rating?

A: No. The main part is rated for 150mA maximum current, while the substitute is rated for 180mA. This higher rating in the substitute reflects improved die and package design. For applications operating at or below 150mA, both parts are fully compatible.

Q: What is the luminous flux difference, and does it affect compatibility?

A: The main part delivers 33 lumens at 65mA test current; the substitute delivers 34 lumens. Both values fall within the specified 31–35 lm tolerance band. This 1-lumen difference is within normal manufacturing variation and does not affect circuit compatibility or optical system design.

Q: Are the RoHS compliance levels interchangeable?

A: Yes. ROHS3 compliance (substitute) represents an enhanced standard that supersedes RoHS Compliant (main part). Components with ROHS3 certification are acceptable in applications requiring either RoHS or ROHS3 compliance.

Q: What is the MSL rating, and is it the same for both parts?

A: Both components carry MSL 2A (4 Weeks) rating. This indicates the parts can be exposed to ambient conditions of 30°C/60% RH for up to 4 weeks before solder reflow without requiring baking. Handling and storage procedures are identical for both parts.

Q: Can I use the substitute in existing inventory management systems?

A: The substitute shares the same base product number (SPMWHT541) as the main part. However, the full part number SPMWHT541MP5WAU0S5 must be used for procurement and inventory tracking to ensure correct component selection and supply chain continuity.

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