SML-310YTT86 Equivalent & Substitute Parts

Part Overview

The SML-310YTT86 is a yellow 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 This part is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. The device operates at 2.1V forward voltage with a 6.3mcd brightness rating and features a clear lens for direct light emission. Finding equivalent substitute parts is necessary for applications requiring continued sourcing, design updates, or inventory optimization while maintaining functional compatibility.

Substiute Parts

SML-310YTT86

Rohm SemiconductorIn Stock: 5117SML-310YTT86 Datasheet

Current PartRFQ

SML-D12Y8WT86

Rohm SemiconductorIn Stock: 372249SML-D12Y8WT86 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-310YTT86 is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use 0603 (1608 Metric) surface mount package with identical footprint dimensions (1.60mm L x 0.80mm W)
• Color: Yellow LED specification must be maintained
• Mounting Type: Surface mount configuration required
• Electrical Compatibility: Forward voltage (Vf) and test current (20mA) must support the same circuit design parameters
• Compliance: RoHS3 compliance and MSL rating must meet or exceed the original specification
• Wavelength Range: Yellow LED wavelength in the 585–590nm range ensures consistent color perception

The substitute part SML-D12Y8WT86 meets these criteria while offering improved brightness (63mcd versus 6.3mcd) and active product status, making it suitable for direct replacement in new designs and ongoing production.

Parameter Comparison

Engineering Selection Recommendations

The SML-D12Y8WT86 is the qualified substitute for the SML-310YTT86 based on the following engineering criteria:

• Package Compatibility: Identical 0603 (1608 Metric) footprint ensures direct PCB placement without layout modifications
• Electrical Parameters: Forward voltage differential of 0.1V (2.1V to 2.2V) is within acceptable tolerance for standard LED circuit designs operating at 20mA test current
• Compliance Status: Both parts maintain ROHS3 compliance and identical MSL rating (3, 168 Hours), ensuring equivalent handling and storage requirements
• Product Lifecycle: The substitute part carries Active product status, providing long-term availability and supply chain stability compared to the Not For New Designs status of the original part
• Functional Differences: The substitute offers 10x brightness improvement (63mcd versus 6.3mcd) with diffused lens versus clear lens, and reduced maximum height (0.65mm versus 0.90mm), providing design flexibility for brightness-critical applications

Frequently Asked Questions (FAQ)

Q: Can SML-D12Y8WT86 be used as a direct drop-in replacement for SML-310YTT86?

A: Yes, the SML-D12Y8WT86 is compatible for direct PCB replacement. Both parts share identical 0603 (1608 Metric) package dimensions and footprint. Circuit designs operating at 20mA test current will function with the 0.1V forward voltage difference. The primary functional difference is increased brightness (63mcd versus 6.3mcd) and lens diffusion characteristics.

Q: What are the key differences between these two parts?

A: The main differences are: (1) Brightness: SML-D12Y8WT86 provides 63mcd versus 6.3mcd; (2) Lens type: SML-D12Y8WT86 features diffused white lens versus clear lens; (3) Height: SML-D12Y8WT86 maximum height is 0.65mm versus 0.90mm; (4) Product status: SML-D12Y8WT86 is Active versus Not For New Designs; (5) Wavelength: 590nm versus 585nm, both within yellow LED specification.

Q: Are there any compliance or handling differences?

A: No. Both parts maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL) rating of 3 (168 Hours), requiring equivalent storage and handling procedures.

Q: Which part should be selected for new designs?

A: The SML-D12Y8WT86 should be selected for new designs due to its Active product status and improved brightness characteristics. The SML-310YTT86 is classified as Not For New Designs and should be reserved for legacy system maintenance only.

Q: Does the diffused lens of SML-D12Y8WT86 affect circuit compatibility?

A: The diffused lens affects light distribution characteristics but does not impact electrical circuit compatibility. Circuit designs remain unchanged; the difference is optical performance and viewing angle characteristics.