SML-511DWT86 Equivalent & Substitute Parts

Part Overview

The SML-511DWT86 is an orange diffused 0603 (1608 Metric) surface mount LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 605nm. This part is classified as Not For New Designs, indicating it has been superseded in Rohm's product portfolio. Finding equivalent and substitute parts is necessary for ongoing production support, maintenance applications, and design flexibility when the primary part becomes unavailable or when alternative specifications better suit application requirements.

Substiute Parts

SML-511DWT86

Rohm SemiconductorIn Stock: 3962SML-511DWT86 Datasheet

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SML-D12D1WT86

Rohm SemiconductorIn Stock: 140682SML-D12D1WT86 Datasheet

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SML-D12D8WT86

Rohm SemiconductorIn Stock: 15413SML-D12D8WT86 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 logic for the SML-511DWT86 is based on the following critical parameters that must align for direct replacement:

Primary Compatibility Criteria:

• Package / Case: 0603 (1608 Metric)
• Mounting Type: Surface Mount
• Color: Orange
• Wavelength - Dominant: 605nm
• Lens Transparency: Diffused
• Lens Color: White
• Size / Dimension: 1.60mm L x 0.80mm W
• Height (Max): 0.65mm

Secondary Compatibility Criteria (Allowable Variation):

• Voltage - Forward (Vf) (Typ): 2V nominal (tolerance range 1.95V to 2.2V acceptable for most applications)
• Current - Test: 20mA (standard test current)
• Millicandela Rating: 40mcd minimum (higher brightness acceptable)

Substitute parts are grouped into two categories:

Group 1 - Direct Orange Diffused Substitutes (SML-D12 Series): Parts SML-D12D1WT86 and SML-D12D8WT86 maintain identical mechanical dimensions, lens properties, and wavelength specifications. These parts differ in forward voltage (2.2V vs 2V) and brightness (100mcd vs 40mcd), representing active product line alternatives with enhanced specifications.

Group 2 - Cross-Manufacturer Yellow Clear Alternatives: Parts 19-219/Y5C-AM1N2VY/3T (Everlight) and QBLP601-Y1 (QT Brightek) represent alternative wavelength and lens transparency options. These parts share the 0603 package and surface mount configuration but differ in color (yellow vs orange), wavelength (590nm vs 605nm), and lens transparency (clear vs diffused). These are substitutes only when application requirements permit wavelength and appearance changes.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Orange 605nm Diffused):

SML-D12D1WT86 and SML-D12D8WT86 are the primary substitutes for the SML-511DWT86. Both parts are manufactured by Rohm Semiconductor and maintain identical mechanical and optical properties. The SML-D12 series represents the active product line continuation with enhanced brightness (100mcd vs 40mcd) and slightly elevated forward voltage (2.2V vs 2V). Both substitute parts are ROHS3 compliant and carry identical MSL ratings. SML-D12D1WT86 is available in Tape & Reel packaging with 140,595 units in stock, while SML-D12D8WT86 is available in Cut Tape & Digi-Reel packaging with 15,400 units in stock. The forward voltage increase of 0.2V requires circuit design verification to ensure proper current limiting resistor values remain within acceptable tolerance ranges.

For Alternative Wavelength Applications (Yellow 590nm):

Parts 19-219/Y5C-AM1N2VY/3T and QBLP601-Y1 are substitutes only when application requirements permit wavelength and lens transparency changes from orange diffused to yellow clear. The Everlight part (19-219/Y5C-AM1N2VY/3T) operates at lower forward voltage (1.95V) and lower test current (5mA) with a viewing angle of 130°, making it suitable for applications requiring wider visibility. The QT Brightek part (QBLP601-Y1) maintains the 20mA test current but delivers significantly lower brightness (8mcd vs 40mcd). These yellow alternatives are appropriate only for applications where color change does not affect functional or aesthetic requirements.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and EAR99 export classification. The SML-D12 series offers superior inventory availability and active product status, making these the recommended primary substitutes. Yellow alternatives should be selected only when application specifications explicitly permit wavelength and appearance modifications.

Frequently Asked Questions (FAQ)

Q: Can SML-D12D1WT86 or SML-D12D8WT86 be used as direct drop-in replacements for SML-511DWT86?

A: Yes, both SML-D12 series parts are direct mechanical and optical replacements. The 0603 package dimensions, surface mount configuration, and diffused white lens properties are identical. The forward voltage increase from 2V to 2.2V requires circuit verification to confirm current limiting resistor values remain appropriate. The increased brightness (100mcd vs 40mcd) is generally beneficial for indication applications.

Q: What is the difference between SML-D12D1WT86 and SML-D12D8WT86?

A: Both parts are electrically and optically identical. The primary difference is packaging: SML-D12D1WT86 is supplied in Tape & Reel format with significantly higher inventory availability (140,595 units), while SML-D12D8WT86 is supplied in Cut Tape & Digi-Reel format with lower inventory (15,400 units). Selection depends on procurement volume and assembly line requirements.

Q: Can yellow LED parts (19-219/Y5C-AM1N2VY/3T or QBLP601-Y1) replace the orange SML-511DWT86?

A: These yellow parts are substitutes only when application requirements permit wavelength change from 605nm (orange) to 590nm (yellow) and lens transparency change from diffused to clear. Color-critical applications, such as status indication where orange specifically indicates a particular system state, cannot use yellow alternatives. Brightness differences must also be evaluated for application visibility requirements.

Q: What are the key electrical differences between the main part and substitutes?

A: The SML-511DWT86 operates at 2V forward voltage with 40mcd brightness. The SML-D12 orange substitutes operate at 2.2V with 100mcd brightness, requiring circuit design review for current limiting resistor compatibility. The yellow alternatives operate at lower forward voltages (1.95V to 2.1V) and significantly lower brightness levels (8mcd to 31.5mcd), necessitating application-specific evaluation.

Q: Are all substitute parts RoHS compliant?

A: SML-D12D1WT86, SML-D12D8WT86, and QBLP601-Y1 are ROHS3 compliant. The Everlight part (19-219/Y5C-AM1N2VY/3T) does not specify RoHS status in available documentation. For applications requiring RoHS certification, the Rohm and QT Brightek parts are confirmed compliant.

Q: What is the moisture sensitivity level for these parts?

A: SML-511DWT86, SML-D12D1WT86, and SML-D12D8WT86 all carry MSL 3 rating (168 hours). This indicates standard moisture sensitivity requiring standard handling and storage procedures. The Everlight and QT Brightek parts do not specify MSL ratings in available documentation.