LED LH351D COOL WHITE 5700K 3535 - SPHWHTL3DA0CF4QTU6 Equivalent & Substitute Parts

Part Overview

The SPHWHTL3DA0CF4QTU6 is a surface-mount LED from Samsung Semiconductor's LH351D series, specified for cool white lighting applications at 5700K color temperature. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing production and maintenance applications. The LED is designed for 3V operation at 1.05A nominal current with a 3535 metric package footprint (1414 imperial designation).

Substiute Parts

SPHWHTL3DA0CF4QTU6

Samsung Semiconductor, Inc.In Stock: 687SPHWHTL3DA0CF4QTU6 Datasheet

Current PartRFQ

SPHWHTL3DA0CF4QTV6

Samsung Semiconductor, Inc.In Stock: 1295SPHWHTL3DA0CF4QTV6 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SPHWHTL3DA0CF4QTU6 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Series designation (LH351D)
• Color and correlated color temperature (White, Cool, 5700K)
• Forward voltage (3V nominal)
• Test current (1.05A)
• Maximum current rating (3A)
• Package footprint (1414 / 3535 Metric)
• Physical dimensions (3.50mm × 3.50mm, 2.46mm height max)
• Viewing angle (128°)
• CRI (70)
• Thermal resistance (2.2°C/W)

Allowable Variation:

• Luminous flux at 85°C test current: 420–480lm range
• Lumens per watt efficiency: variations within product line specifications
• Product status: Active status preferred over obsolete for supply continuity

The substitute part SPHWHTL3DA0CF4QTV6 meets all critical parameters and operates within the specified electrical and thermal envelope.

Parameter Comparison

Engineering Selection Recommendations

The SPHWHTL3DA0CF4QTV6 is a direct substitute for the obsolete SPHWHTL3DA0CF4QTU6 based on the following engineering criteria:

Electrical Compatibility: Both parts operate at identical forward voltage (3V) and test current (1.05A), with matching maximum current ratings (3A). The substitute exhibits higher luminous flux (470lm vs. 450lm at 85°C) and improved efficiency (149 lm/W vs. 143 lm/W), both within acceptable product line variation.

Mechanical Compatibility: Package footprint, physical dimensions, and height specifications are identical, ensuring direct PCB layout compatibility without redesign.

Thermal Compatibility: Thermal resistance rating (2.2°C/W) is identical, maintaining equivalent thermal performance in system applications.

Compliance and Supply Status: The substitute part maintains RoHS compliance and MSL rating identical to the main part. The active product status of SPHWHTL3DA0CF4QTV6 provides supply continuity and eliminates obsolescence risk associated with the main part designation.

Selection Basis: Component selection should prioritize SPHWHTL3DA0CF4QTV6 for new designs and production continuity due to active status and superior luminous efficiency within the same electrical and mechanical envelope.

Frequently Asked Questions (FAQ)

Q: Can SPHWHTL3DA0CF4QTV6 be used as a direct replacement for SPHWHTL3DA0CF4QTU6 on existing PCBs?

A: Yes. Both parts share identical package footprint (1414 / 3535 Metric), physical dimensions (3.50mm × 3.50mm), and height specifications (2.46mm max). No PCB layout modification is required.

Q: What is the difference in luminous output between these two parts?

A: At 85°C and 1.05A test current, SPHWHTL3DA0CF4QTV6 produces 470lm compared to 450lm for SPHWHTL3DA0CF4QTU6. This 20lm increase (4.4% higher) falls within normal product line variation and does not affect system-level performance in standard lighting applications.

Q: Are the electrical operating parameters identical?

A: Yes. Forward voltage (3V typical), test current (1.05A), and maximum current rating (3A) are identical. Both parts operate within the same electrical envelope and require identical drive circuitry.

Q: Why is the substitute part listed as Active while the main part is Obsolete?

A: Product status reflects manufacturing availability. The substitute SPHWHTL3DA0CF4QTV6 remains in active production, ensuring supply continuity. The main part SPHWHTL3DA0CF4QTU6 has been discontinued, making the substitute the recommended choice for ongoing applications.

Q: Are thermal characteristics the same?

A: Yes. Thermal resistance is identical at 2.2°C/W for both parts, ensuring equivalent thermal performance in system designs.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS Compliant with identical MSL rating (2A, 4 Weeks), ECCN (EAR99), and HTSUS classification (8541.41.0000).

Q: What is the CRI rating for both parts?

A: Both parts have a CRI of 70, providing identical color rendering characteristics for cool white 5700K lighting applications.