SML-310DTT86 Equivalent & Substitute Parts

Part Overview

The SML-310DTT86 is an orange 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 This part is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Organizations using this component in active production or maintenance applications require qualified substitute parts that maintain electrical and mechanical compatibility while offering current product status and availability.

Substiute Parts

SML-310DTT86

Rohm SemiconductorIn Stock: 285882SML-310DTT86 Datasheet

Current PartRFQ

SML-D12D1WT86

Rohm SemiconductorIn Stock: 140682SML-D12D1WT86 Datasheet

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SML-D12D8WT86

Rohm SemiconductorIn Stock: 15413SML-D12D8WT86 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SML-310DTT86 are qualified based on the following criteria:

Mandatory Compatibility Parameters:

• Package / Case: 0603 (1608 Metric)
• Color: Orange
• Mounting Type: Surface Mount
• Size / Dimension: 1.60mm L x 0.80mm W
• Manufacturer: Rohm Semiconductor
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Typ): 2V to 2.2V (within typical LED forward voltage tolerance)
• Current - Test: 20mA (standard test current)
• Millicandela Rating: Variation permitted based on application requirements
• Height (Max): Up to 0.90mm
• Wavelength - Peak: 605nm to 610nm (orange spectrum range)
• Lens Transparency: Clear or Diffused (both acceptable for indication applications)
• Lens Color: Colorless or White (both acceptable for indication applications)
• Product Status: Active preferred for new applications; Not For New Designs acceptable for replacement

The substitute parts SML-D12D1WT86 and SML-D12D8WT86 meet all mandatory compatibility parameters and fall within allowable variation ranges.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: Both SML-D12D1WT86 and SML-D12D8WT86 are qualified substitutes for the SML-310DTT86. Both parts carry Active product status, providing access to current manufacturing and supply chain support. The forward voltage increase from 2V to 2.2V is within standard LED tolerance and does not preclude substitution in typical indicator applications.

Packaging Consideration:

• SML-D12D8WT86 matches the original Cut Tape (CT) & Digi-Reel® packaging format
• SML-D12D1WT86 is supplied in Tape & Reel (TR) format, requiring packaging format evaluation for assembly compatibility

Compliance Status: All three parts maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental handling requirements remain unchanged.

Brightness Differential: The substitute parts deliver 100mcd versus the original 6.3mcd. This increased luminous intensity is acceptable for indication applications and does not create compatibility issues in standard circuit designs.

Frequently Asked Questions (FAQ)

Q: Can SML-D12D1WT86 and SML-D12D8WT86 be used interchangeably with SML-310DTT86?

A: Both parts are electrically and mechanically compatible substitutes. The primary difference is packaging format: SML-D12D8WT86 uses Cut Tape (CT) & Digi-Reel® matching the original, while SML-D12D1WT86 uses Tape & Reel (TR). Verify your assembly equipment compatibility with the selected packaging format.

Q: What is the impact of the 0.2V forward voltage increase (2V to 2.2V)?

A: The increase from 2V to 2.2V is within standard LED forward voltage tolerance and does not require circuit redesign for typical indicator applications. Verify your current-limiting resistor design accommodates this variation if operating near voltage supply limits.

Q: Why do the substitute parts have higher millicandela ratings (100mcd vs 6.3mcd)?

A: The substitute parts deliver increased luminous intensity. This does not create compatibility issues and may improve indicator visibility. If brightness reduction is required, implement optical filtering or current limiting in the circuit design.

Q: Are there differences in lens characteristics between the original and substitutes?

A: The original SML-310DTT86 features a clear lens, while substitutes feature diffused white lenses. Both lens types are acceptable for indication applications. Diffused lenses provide wider viewing angles and more uniform brightness distribution.

Q: Do all three parts meet the same compliance and handling requirements?

A: Yes. All parts are ROHS3 compliant with identical MSL ratings of 3 (168 Hours), ensuring no changes to storage, handling, or environmental compliance procedures.