SML-310PTT86TH Equivalent & Substitute Parts

Part Overview

The SML-310PTT86TH 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 essential for design continuity and long-term supply chain planning.

Substiute Parts

SML-310PTT86TH

Rohm SemiconductorIn Stock: 738SML-310PTT86TH Datasheet

Current PartRFQ

SML-D12P8WT86

Rohm SemiconductorIn Stock: 105152SML-D12P8WT86 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-310PTT86TH is determined by the following critical parameters:

• Color and Wavelength: Green 560nm dominant wavelength
• Electrical Characteristics: 2.2V forward voltage and 20mA test current
• Package Format: 0603 (1608 Metric) surface mount
• Physical Dimensions: 1.60mm L x 0.80mm W footprint compatibility
• Lens Configuration: Rectangle with flat top geometry
• Mounting Type: Surface mount technology

The substitute part SML-D12P8WT86 meets all critical substitution criteria. While lens transparency differs (diffused versus clear) and millicandela rating increases (6.3mcd versus 4mcd), these variations remain within acceptable bounds for LED indicator applications where the dominant wavelength, forward voltage, test current, and package footprint are preserved.

Parameter Comparison

Engineering Selection Recommendations

The SML-D12P8WT86 is the qualified substitute for the SML-310PTT86TH based on electrical and mechanical compatibility. Both components share identical forward voltage (2.2V), test current (20mA), dominant wavelength (560nm), and package footprint (0603/1608 Metric).

The substitute part offers Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy designation of the main part. The SML-D12P8WT86 carries ROHS3 compliance, REACH Unaffected status, and MSL 3 (168 Hours) moisture sensitivity rating.

The increased luminous intensity (6.3mcd versus 4mcd) and diffused lens transparency of the substitute provide enhanced visibility characteristics suitable for indicator applications. The reduced maximum height (0.65mm versus 0.90mm) offers improved PCB assembly clearance.

Frequently Asked Questions (FAQ)

Q: Can SML-D12P8WT86 be used as a direct replacement for SML-310PTT86TH?

A: Yes. Both components operate at identical forward voltage (2.2V) and test current (20mA), share the same 560nm dominant wavelength, and use the 0603 (1608 Metric) package with matching footprint dimensions (1.60mm L x 0.80mm W). Electrical circuit compatibility is maintained.

Q: What are the differences between these two parts?

A: The primary differences are lens transparency (clear versus diffused), millicandela rating (4mcd versus 6.3mcd), maximum height (0.90mm versus 0.65mm), and product status (Last Time Buy versus Active). The substitute provides higher luminous intensity and improved visibility through diffused optics.

Q: Does the diffused lens affect circuit performance?

A: No. Lens transparency is an optical characteristic that does not affect electrical performance. The forward voltage, test current, and wavelength remain identical, ensuring circuit-level compatibility.

Q: Are there PCB layout considerations when switching to SML-D12P8WT86?

A: The footprint dimensions are identical (1.60mm L x 0.80mm W), requiring no PCB layout modifications. The reduced maximum height (0.65mm) provides additional clearance margin during assembly.

Q: What compliance certifications apply to the substitute part?

A: SML-D12P8WT86 is ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 3 (168 Hours).