SML-512MWT86 Equivalent & Substitute Parts

Part Overview

The SML-512MWT86 is a green diffused 0603 (1608 Metric) surface mount LED manufactured by Rohm Semiconductor. This part operates at 2.1V forward voltage with a 40mcd brightness rating and 570nm dominant wavelength. The product is classified as Not For New Designs, making identification of equivalent and substitute parts essential for ongoing production support, maintenance applications, and design transitions.

Substiute Parts

SML-512MWT86

Rohm SemiconductorIn Stock: 63168SML-512MWT86 Datasheet

Current PartRFQ

SML-D12M1WT86

Rohm SemiconductorIn Stock: 207653SML-D12M1WT86 Datasheet

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SML-D12M8WT86

Rohm SemiconductorIn Stock: 36308SML-D12M8WT86 Datasheet

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SML-D13M8WT86

Rohm SemiconductorIn Stock: 52703SML-D13M8WT86 Datasheet

Parametric EquivalentRFQ

19-218/GHC-YR1S2M/3T

Everlight Electronics Co LtdIn Stock: 102119-218/GHC-YR1S2M/3T Datasheet

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QBLP601-IG

QT Brightek (QTB)In Stock: 4693QBLP601-IG Datasheet

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QBLP601-YG

QT Brightek (QTB)In Stock: 1201QBLP601-YG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-512MWT86 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 0603 (1608 Metric) surface mount form factor
• Mounting Type: Surface Mount
• Color: Green
• Current - Test: 20mA
• Size / Dimension: 1.60mm L x 0.80mm W (within tolerance)
• Height (Max): 0.65mm (within tolerance)

Secondary Compatibility Criteria:

• Voltage - Forward (Vf): 2.1V to 2.2V range acceptable for most applications
• Millicandela Rating: 25mcd to 40mcd range maintains functional brightness
• Wavelength - Dominant: 570nm to 572nm range maintains green color perception
• Lens Transparency: Diffused lens type preferred for consistency
• RoHS Status: ROHS3 Compliant required
• MSL: 3 (168 Hours) or equivalent

Substitute parts are grouped into two categories:

Category 1: Direct Rohm Semiconductor Substitutes (Preferred) Parts SML-D12M1WT86, SML-D12M8WT86, and SML-D13M8WT86 maintain Rohm Semiconductor manufacturing, identical package specifications, and compatible electrical parameters within acceptable ranges.

Category 2: Cross-Manufacturer Substitutes (Conditional) Parts 19-218/GHC-YR1S2M/3T (Everlight Electronics), QBLP601-IG, and QBLP601-YG (QT Brightek) meet package and mounting requirements but introduce variations in forward voltage, brightness, wavelength, and lens transparency that require circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Rohm Semiconductor Direct Substitutes (Recommended Priority)

SML-D13M8WT86 and SML-D12M1WT86 are the preferred substitutes. Both maintain Rohm Semiconductor manufacturing continuity, ROHS3 compliance, and MSL 3 (168 Hours) specifications. SML-D13M8WT86 matches the original 40mcd brightness rating and offers Active product status with Tape & Reel packaging. SML-D12M1WT86 provides Yellow-Green color at 572nm with equivalent brightness and Active status with higher inventory availability (207,573 pcs).

Forward voltage increases from 2.1V to 2.2V across these Rohm substitutes. This 0.1V difference is within typical LED circuit tolerance margins and does not require redesign for standard current-limiting resistor applications.

SML-D12M8WT86 offers an alternative with reduced brightness (25mcd) and Active status, suitable for applications where lower luminous intensity is acceptable.

Cross-Manufacturer Substitutes (Conditional Use)

19-218/GHC-YR1S2M/3T (Everlight Electronics) introduces significant parameter variations: forward voltage increases to 3.35V, brightness increases to 198.5mcd, and wavelength shifts to 528nm (blue-green). Lens transparency changes from diffused to clear. These changes require circuit redesign and are suitable only for applications where higher brightness and clear lens characteristics are beneficial.

QBLP601-IG (QT Brightek) presents the highest brightness option at 450mcd with 3.2V forward voltage and 525nm wavelength. Clear lens transparency and reduced height (0.60mm) require application-specific evaluation.

QBLP601-YG (QT Brightek) aligns most closely with the original specification: 2.1V forward voltage and 572nm wavelength match the SML-512MWT86 electrical profile. However, significantly reduced brightness (10mcd) limits this option to low-intensity indication applications only.

Compliance and Certification

All Rohm Semiconductor substitutes maintain ROHS3 compliance and MSL 3 (168 Hours) specifications. Cross-manufacturer parts QBLP601-IG and QBLP601-YG also maintain these certifications. The Everlight part (19-218/GHC-YR1S2M/3T) does not specify RoHS or MSL status and requires compliance verification before use in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SML-D13M8WT86 be used as a direct replacement for SML-512MWT86?

A: Yes. SML-D13M8WT86 is a parametric equivalent with identical package dimensions (0603/1608 Metric), matching brightness (40mcd), compatible forward voltage (2.2V vs. 2.1V), and equivalent wavelength (572nm vs. 570nm). Both maintain ROHS3 compliance and MSL 3 specifications. The 0.1V voltage increase does not require circuit modification in standard LED applications.

Q: What is the primary difference between diffused and clear lens options?

A: Lens transparency affects light distribution and perceived brightness. Diffused lenses scatter light over a wider viewing angle with softer appearance, while clear lenses concentrate light with higher intensity in the forward direction. The SML-512MWT86 uses a diffused lens. Cross-manufacturer substitutes with clear lenses (19-218/GHC-YR1S2M/3T, QBLP601-IG, QBLP601-YG) produce different visual characteristics and may require optical design evaluation.

Q: Why do some substitutes have significantly different forward voltages?

A: Forward voltage (Vf) depends on LED semiconductor material and design. The SML-512MWT86 operates at 2.1V. Rohm substitutes operate at 2.2V (minimal difference). Everlight and QT Brightek parts operate at 3.2V to 3.35V due to different semiconductor technology. Higher forward voltage requires higher supply voltage or modified current-limiting resistor values. Applications with fixed 2.1V to 2.2V supply voltage cannot accommodate 3.2V+ parts without circuit redesign.

Q: Is packaging format identical across all substitutes?

A: All listed substitutes use 0603 (1608 Metric) surface mount packaging with compatible footprints. However, physical dimensions vary slightly: the Everlight part (19-218/GHC-YR1S2M/3T) is 1.60mm L x 1.00mm W (vs. 0.80mm W standard), and height varies from 0.40mm to 0.65mm. PCB layout verification is required for parts with non-standard dimensions.

Q: Which substitute offers the best inventory availability?

A: SML-D12M1WT86 (Rohm Semiconductor) provides the highest inventory: 207,573 pcs. SML-D13M8WT86 offers 52,659 pcs. Cross-manufacturer options have lower availability: QBLP601-IG (4,637 pcs), QBLP601-YG (1,115 pcs), and 19-218/GHC-YR1S2M/3T (994 pcs).

Q: Are all substitutes ROHS3 compliant?

A: Rohm Semiconductor parts (SML-D12M1WT86, SML-D12M8WT86, SML-D13M8WT86) and QT Brightek parts (QBLP601-IG, QBLP601-YG) are specified as ROHS3 compliant. The Everlight part (19-218/GHC-YR1S2M/3T) does not specify RoHS status and requires compliance verification before use in regulated applications.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the SML-512MWT86 is in end-of-life phase and Rohm Semiconductor does not recommend it for new product development. Active-status substitutes (SML-D13M8WT86, SML-D12M1WT86, SML-D12M8WT86) are recommended for new designs while maintaining compatibility with existing production.