SML-310PTT86TL Equivalent & Substitute Parts

Part Overview

The SML-310PTT86TL is a green 560nm LED indicator manufactured by Rohm Semiconductor in the SML-31 series. This surface mount component operates at 2.2V forward voltage with a 20mA test current and delivers 4mcd luminous intensity. The device is packaged in 0603 (1608 Metric) form factor with a clear rectangular lens. Currently designated as Last Time Buy, identifying substitute components is necessary to ensure design continuity and long-term supply chain reliability.

Substiute Parts

SML-310PTT86TL

Rohm SemiconductorIn Stock: 965SML-310PTT86TL Datasheet

Current PartRFQ

SML-D12P8WT86

Rohm SemiconductorIn Stock: 105152SML-D12P8WT86 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-310PTT86TL is determined by the following critical parameters:

Electrical Compatibility:

• Voltage - Forward (Vf): 2.2V (exact match required)
• Current - Test: 20mA (exact match required)
• Wavelength - Dominant: 560nm (exact match required)
• Color: Green (exact match required)

Mechanical & Optical Compatibility:

• Package / Case: 0603 (1608 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Lens Style: Rectangle with Flat Top (exact match required)
• Lens Size: 1.20mm x 0.80mm (exact match required)

Acceptable Variations:

• Millicandela Rating: May exceed 4mcd (higher brightness acceptable)
• Lens Color: May differ from Green (diffused or white lens acceptable if optical performance permits)
• Lens Transparency: May differ from Clear (diffused acceptable)
• Height (Max): May be lower than 0.90mm (space-saving acceptable)
• Product Status: Active status preferred over Last Time Buy

The SML-D12P8WT86 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters while offering improved availability and active product status.

Parameter Comparison

Engineering Selection Recommendations

The SML-D12P8WT86 is qualified as a direct electrical and mechanical substitute for the SML-310PTT86TL. Both components share identical forward voltage (2.2V), test current (20mA), dominant wavelength (560nm), and package form factor (0603/1608 Metric).

The SML-D12P8WT86 offers the following advantages:

• Active product status ensures long-term availability and supply chain stability
• ROHS3 compliance and defined MSL rating (3, 168 Hours) provide regulatory clarity
• Higher millicandela rating (6.3mcd vs. 4mcd) delivers increased luminous intensity
• Reduced maximum height (0.65mm vs. 0.90mm) provides improved PCB layout flexibility

The diffused lens and white lens color of the SML-D12P8WT86 alter the optical appearance compared to the clear green lens of the SML-310PTT86TL. Applications requiring identical visual characteristics should evaluate this difference against functional requirements.

Frequently Asked Questions (FAQ)

Q: Can the SML-D12P8WT86 replace the SML-310PTT86TL in existing designs?

A: Yes. Both components operate at identical electrical parameters (2.2V forward voltage, 20mA test current, 560nm wavelength) and share the same 0603 (1608 Metric) package footprint. PCB layout and schematic connections require no modification.

Q: What is the impact of the diffused lens on optical performance?

A: The SML-D12P8WT86 features a diffused lens with white lens color, compared to the clear green lens of the SML-310PTT86TL. This produces a softer, more dispersed light output. Applications requiring specific light distribution patterns should evaluate this optical difference.

Q: Why is the SML-D12P8WT86 brighter (6.3mcd vs. 4mcd)?

A: The higher millicandela rating reflects the optical design of the diffused lens configuration. Both components operate at identical electrical parameters; the brightness difference results from lens design, not electrical characteristics.

Q: Does the reduced height (0.65mm vs. 0.90mm) affect compatibility?

A: No. The lower profile of the SML-D12P8WT86 is mechanically compatible with designs accommodating the original 0.90mm height. This provides additional PCB layout flexibility without requiring design changes.

Q: What compliance certifications apply to the substitute part?

A: The SML-D12P8WT86 is ROHS3 compliant with Moisture Sensitivity Level 3 (168 Hours). REACH status is Unaffected. ECCN classification is EAR99.