SML-211YTT86 Equivalent & Substitute Parts

Part Overview

The SML-211YTT86 is a yellow 587nm LED indicator in 0805 (2012 Metric) surface mount package manufactured by Rohm Semiconductor. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Finding equivalent substitute parts is necessary for ongoing production support, maintenance applications, and legacy system repairs where this specific part number may no longer be readily available or where design flexibility permits component substitution.

Substiute Parts

SML-211YTT86

Rohm SemiconductorIn Stock: 1952SML-211YTT86 Datasheet

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SML-H12Y8TT86

Rohm SemiconductorIn Stock: 4796SML-H12Y8TT86 Datasheet

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150080YS75000

Würth ElektronikIn Stock: 33884150080YS75000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SML-211YTT86 are identified based on the following critical parameters that determine functional compatibility:

Package Compatibility: All substitute parts must use the 0805 (2012 Metric) surface mount package to ensure mechanical fit on existing PCB layouts without redesign.

Color and Wavelength: Yellow LED indicators with dominant wavelengths in the 587nm to 590nm range are functionally equivalent for visual indication applications. The SML-211YTT86 operates at 587nm, while substitute parts operate at 590nm, representing a negligible difference in perceived color for indication purposes.

Electrical Parameters: Forward voltage (Vf) and test current define the LED's operating characteristics. The main part operates at 1.8V / 2mA, while substitutes operate at 2.0V to 2.2V / 20mA. These differences require circuit-level evaluation but do not preclude substitution in applications with appropriate current-limiting resistor adjustment.

Brightness (Millicandela Rating): The main part is rated at 4mcd, while substitutes range from 63mcd to 120mcd. Higher brightness ratings provide improved visibility but may require circuit modifications to maintain consistent indicator intensity.

Lens Configuration: All parts feature clear, colorless lenses with rectangular flat-top styling, ensuring consistent optical performance and appearance.

Compliance and Certifications: All parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for equivalent substitution.

Parameter Comparison

Engineering Selection Recommendations

SML-H12Y8TT86 (Rohm Semiconductor): This substitute maintains Rohm Semiconductor as the manufacturer, ensuring consistency with existing supply chain relationships. The part is Active status, providing long-term availability. The forward voltage increase from 1.8V to 2.2V and current increase from 2mA to 20mA require circuit-level resistor recalculation. The significantly higher brightness rating (63mcd vs. 4mcd) may necessitate intensity adjustment through current limiting. Moisture sensitivity level increases from MSL 3 to MSL 4, requiring stricter storage and handling protocols (72-hour window vs. 168-hour window).

150080YS75000 (Würth Elektronik): This substitute provides the lowest profile height (0.80mm vs. 0.90mm), beneficial for space-constrained applications. The forward voltage of 2.0V represents a moderate increase from the main part. The highest brightness rating (120mcd) offers superior visibility but requires the most significant circuit modification. Peak wavelength specification (595nm) provides additional optical characterization. Moisture sensitivity level matches the main part (MSL 3, 168 Hours). The specified viewing angle of 140° provides quantified optical performance data absent from other parts.

Both substitutes maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the main part. Selection between substitutes depends on circuit design flexibility, brightness requirements, and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the SML-H12Y8TT86 be used as a direct replacement without circuit modification?

A: No. The SML-H12Y8TT86 operates at 2.2V / 20mA compared to the main part's 1.8V / 2mA. The current-limiting resistor in the circuit must be recalculated to accommodate the higher operating current. Direct substitution without resistor adjustment will result in excessive current draw and potential LED failure.

Q: What is the significance of the wavelength difference between 587nm and 590nm?

A: The 3nm difference is negligible for visual indication applications. Both wavelengths are perceived as yellow by the human eye. The wavelength difference does not affect functional compatibility in standard indicator circuits.

Q: Why does the 150080YS75000 have a lower height (0.80mm vs. 0.90mm)?

A: Manufacturing tolerances and internal LED die configuration differ between manufacturers. The lower height of the Würth Elektronik part may provide advantages in applications with strict height constraints, such as low-profile assemblies or confined spaces.

Q: What does MSL 4 (72 Hours) mean for the SML-H12Y8TT86?

A: Moisture Sensitivity Level 4 indicates the component must be used within 72 hours of opening the moisture barrier bag. The main part and 150080YS75000 allow 168 hours. This requires more frequent inventory rotation and stricter handling procedures to prevent moisture absorption and potential solder joint failures.

Q: Are all three parts suitable for new designs?

A: The SML-211YTT86 is marked Not For New Designs and should not be selected for new product development. Both SML-H12Y8TT86 and 150080YS75000 are Active status parts and are appropriate for new designs, subject to circuit compatibility verification.

Q: Can the 150080YS75000 be used in applications requiring specific viewing angle specifications?

A: Yes. The 150080YS75000 specifies a 140° viewing angle, providing quantified optical performance data. This specification is absent from the main part and SML-H12Y8TT86, making the Würth Elektronik part preferable for applications with defined viewing angle requirements.

Q: What is the impact of the higher millicandela rating on circuit design?

A: Higher brightness (63mcd to 120mcd vs. 4mcd) requires proportionally higher current limiting through resistor adjustment. Excessive brightness may also cause visual discomfort or interfere with optical sensors. Circuit design must account for the desired indicator intensity and adjust the current-limiting resistor accordingly.