SML-311UTT86 Equivalent & Substitute Parts

Part Overview

The SML-311UTT86 is a red 620nm LED indicator in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This part operates at 1.8V forward voltage with 2mA test current and delivers 2.5mcd luminous intensity through a clear colorless lens. The product is classified as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing production support and design flexibility.

Substiute Parts

SML-311UTT86

Rohm SemiconductorIn Stock: 6291SML-311UTT86 Datasheet

Current PartRFQ

SML-D12U1WT86

Rohm SemiconductorIn Stock: 493848SML-D12U1WT86 Datasheet

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SML-D12U8WT86

Rohm SemiconductorIn Stock: 30369SML-D12U8WT86 Datasheet

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19-213SURC/S530-A2/TR8

Everlight Electronics Co LtdIn Stock: 649619-213SURC/S530-A2/TR8 Datasheet

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19-213SURC/S530-A5/TR8

Everlight Electronics Co LtdIn Stock: 81819-213SURC/S530-A5/TR8 Datasheet

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19-213SURC/S530-A6/TR8

Everlight Electronics Co LtdIn Stock: 95219-213SURC/S530-A6/TR8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-311UTT86 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 0603 (1608 Metric) surface mount
• Color: Red wavelength range (620nm–624nm dominant wavelength acceptable)
• Lens Transparency: Clear or Diffused
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Secondary Electrical Parameters:

• Voltage - Forward (Vf): 1.8V–2.95V range
• Current - Test: 2mA–20mA range
• Millicandela Rating: 2.5mcd–119mcd range

Physical Constraints:

• Size / Dimension: 1.60mm L x 0.80mm W (fixed)
• Height (Max): 0.65mm–0.90mm acceptable

Substitute parts must maintain the 0603 package footprint and surface mount configuration. Red color LEDs with clear or diffused lenses in the specified voltage and current ranges are functionally interchangeable in indicator applications. The Everlight 19-213SURC/S530-A2/TR8 (white LED) is included as a substitute only where color substitution is acceptable in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Rohm Semiconductor Red LED Substitutes (SML-D12U1WT86, SML-D12U8WT86): Both parts maintain red 620nm wavelength compatibility and ROHS3 compliance. These substitutes feature diffused white lenses and higher luminous intensity (63mcd) compared to the original 2.5mcd. Forward voltage increases to 2.2V with test current at 20mA. Height reduction to 0.65mm provides improved PCB clearance. Both parts carry Active product status, ensuring long-term availability and supply chain stability.

Everlight Electronics Red LED Substitutes (19-213SURC/S530-A5/TR8, 19-213SURC/S530-A6/TR8): These parts deliver red 624nm wavelength operation with clear colorless lenses matching the original optical transparency. Forward voltage of 2V and test current of 20mA fall within acceptable operating ranges. Luminous intensity ratings of 98mcd and 119mcd exceed the original specification. Height of 0.70mm and Active product status support production continuity. Viewing angle specification of 120° is provided.

Everlight Electronics White LED Substitute (19-213SURC/S530-A2/TR8): This part is suitable only where application design permits white LED substitution for red. Forward voltage of 2.95V and test current of 5mA differ significantly from the original. Luminous intensity of 157.5mcd and 130° viewing angle are provided. Yellow lens color with diffused transparency alters optical characteristics. ROHS3 compliance and Active status are maintained.

Frequently Asked Questions (FAQ)

Q: Can SML-D12U1WT86 and SML-D12U8WT86 be used interchangeably with SML-311UTT86?

A: Both parts are functionally equivalent substitutes. They maintain the 0603 package footprint, red 620nm wavelength, and surface mount configuration. The primary differences are increased luminous intensity (63mcd vs. 2.5mcd), higher forward voltage (2.2V vs. 1.8V), and diffused lens appearance. Circuit design must accommodate the higher voltage and current requirements.

Q: What are the key differences between Rohm and Everlight red LED substitutes?

A: Rohm SML-D12 series maintains 620nm wavelength with diffused white lenses and 2.2V forward voltage. Everlight 19-213SURC/S530-A5/TR8 and A6/TR8 variants provide 624nm wavelength with clear colorless lenses and 2V forward voltage. Both are ROHS3 compliant and Active status. Wavelength and lens transparency differences may affect visual appearance in the application.

Q: Is the Everlight white LED (19-213SURC/S530-A2/TR8) a direct substitute?

A: This part is not a direct substitute due to color change from red to white. It is suitable only where application design explicitly permits white LED operation. Forward voltage of 2.95V requires circuit redesign. Use only if color substitution is acceptable and circuit modifications are feasible.

Q: What is the impact of height differences between substitute parts?

A: The original SML-311UTT86 has maximum height of 0.90mm. Rohm substitutes reduce to 0.65mm, and Everlight parts to 0.70mm. Lower height improves PCB clearance and may reduce solder joint stress. All heights remain within typical 0603 package specifications and do not affect electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original SML-311UTT86 certification. This ensures regulatory compliance for applications requiring RoHS adherence.

Q: What is the significance of Product Status for these substitutes?

A: The original SML-311UTT86 is marked Not For New Designs, indicating end-of-life status. All substitute parts carry Active product status, ensuring continued manufacturing, availability, and long-term supply chain support for production requirements.