SML-511WWT86 Yellow LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The SML-511WWT86 is a yellow 590nm LED indicator in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This part is classified as Not For New Designs, indicating it has reached end-of-life status. Finding equivalent substitute parts is necessary for ongoing production support, maintenance applications, and design continuity where this component was previously specified.

Substiute Parts

SML-511WWT86

Rohm SemiconductorIn Stock: 6431SML-511WWT86 Datasheet

Current PartRFQ

SML-D12Y1WT86

Rohm SemiconductorIn Stock: 396281SML-D12Y1WT86 Datasheet

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SML-D12Y8WT86

Rohm SemiconductorIn Stock: 372249SML-D12Y8WT86 Datasheet

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19-219/Y5C-AM1N2VY/3T

Everlight Electronics Co LtdIn Stock: 111319-219/Y5C-AM1N2VY/3T Datasheet

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QBLP601-Y1

QT Brightek (QTB)In Stock: 1159QBLP601-Y1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-511WWT86 is determined by the following critical parameters:

• Package compatibility: 0603 (1608 Metric) surface mount package
• Color and wavelength: Yellow 590nm dominant wavelength
• Electrical characteristics: Forward voltage (Vf) range and test current
• Optical characteristics: Millicandela rating, lens transparency, and lens color
• Physical dimensions: 1.60mm L x 0.80mm W footprint and maximum height
• Compliance: RoHS3 compliance and MSL rating

Substitute parts must maintain compatibility across these parameters to ensure direct replacement capability in existing PCB designs and circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Rohm Semiconductor - Active Status)

SML-D12Y1WT86 and SML-D12Y8WT86 are the preferred substitutes for the SML-511WWT86. Both parts are manufactured by Rohm Semiconductor with Active product status, ensuring long-term availability and supply chain continuity. These parts maintain identical package dimensions, footprint compatibility, and optical characteristics (diffused white lens). Forward voltage increases to 2.2V and millicandela ratings are higher (100mcd and 63mcd respectively), which may require circuit current-limiting resistor adjustment but provides improved brightness performance.

Secondary Substitutes (Alternative Manufacturers)

19-219/Y5C-AM1N2VY/3T (Everlight Electronics) and QBLP601-Y1 (QT Brightek) are alternative options with Active product status. These parts feature clear colorless lenses rather than diffused white lenses, resulting in different optical characteristics and viewing angles. The Everlight part operates at lower forward voltage (1.95V) and test current (5mA), while the QT Brightek part has significantly lower brightness (8mcd). These alternatives are suitable only when optical appearance differences are acceptable and circuit design accommodates the electrical parameter variations.

Compliance Considerations

All Rohm Semiconductor substitutes maintain ROHS3 compliance and MSL 3 rating, matching the original part specifications. The Everlight and QT Brightek alternatives do not specify RoHS or MSL compliance in the provided data and should be evaluated against specific compliance requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can SML-D12Y1WT86 directly replace SML-511WWT86 without circuit modifications?

A: SML-D12Y1WT86 maintains identical package, footprint, and physical dimensions. However, forward voltage increases from 2V to 2.2V. Circuit current-limiting resistors may require adjustment to maintain desired brightness levels. Verify that the circuit design accommodates the higher forward voltage specification.

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

A: The SML-511WWT86 features a diffused white lens that scatters light uniformly across a wider viewing angle with reduced brightness concentration. The Everlight 19-219/Y5C-AM1N2VY/3T and QT Brightek QBLP601-Y1 feature clear colorless lenses that provide directional light output with higher brightness concentration. Lens type selection depends on application requirements for light distribution and viewing angle.

Q: Why is the SML-511WWT86 marked as Not For New Designs?

A: This designation indicates the part has reached end-of-life status at the manufacturer. Rohm Semiconductor recommends using active alternatives such as SML-D12Y1WT86 or SML-D12Y8WT86 for new designs to ensure long-term supply availability and manufacturer support.

Q: Are there inventory differences between substitute options?

A: Yes. SML-D12Y1WT86 has 396,254 pcs in stock, SML-D12Y8WT86 has 372,200 pcs, while 19-219/Y5C-AM1N2VY/3T has 1,044 pcs and QBLP601-Y1 has 1,107 pcs. Rohm Semiconductor substitutes offer significantly higher inventory availability.

Q: What packaging options are available for substitutes?

A: SML-D12Y1WT86 is supplied in Tape & Reel (TR) packaging. SML-D12Y8WT86 is available in Cut Tape (CT) & Digi-Reel® packaging. Both Everlight and QT Brightek parts are supplied in Tape & Reel (TR) packaging. Verify packaging compatibility with assembly equipment specifications.