SML-511UWT86 Equivalent & Substitute Parts

Part Overview

The SML-511UWT86 is a red diffused LED in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This part is classified as Not For New Designs, indicating it has reached end-of-life status. The primary wavelength is 620nm with a forward voltage of 2V at 20mA test current and brightness rating of 40mcd. Due to its discontinued status, equivalent substitute parts from the active SML-D12 series are available to maintain design continuity and ensure supply chain availability.

Substiute Parts

SML-511UWT86

Rohm SemiconductorIn Stock: 4612SML-511UWT86 Datasheet

Current PartRFQ

SML-D12U1WT86

Rohm SemiconductorIn Stock: 493848SML-D12U1WT86 Datasheet

SimilarRFQ

SML-D12U8WT86

Rohm SemiconductorIn Stock: 30369SML-D12U8WT86 Datasheet

SimilarRFQ

SML-D12V1WT86

Rohm SemiconductorIn Stock: 4174SML-D12V1WT86 Datasheet

Parametric EquivalentRFQ

SML-D12V8WT86

Rohm SemiconductorIn Stock: 90361SML-D12V8WT86 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SML-511UWT86 is determined by the following critical parameters:

Mechanical Compatibility: Package type (0603/1608 Metric), mounting type (Surface Mount), lens size (1.20mm x 0.80mm), and physical dimensions (1.60mm L x 0.80mm W, 0.65mm Max Height) must remain identical.

Electrical Compatibility: Forward voltage (Vf), test current (20mA), and wavelength characteristics determine functional equivalence. Substitute parts must operate within acceptable voltage and current ranges for the intended application.

Environmental & Compliance: RoHS3 compliance, MSL rating (3 - 168 Hours), and REACH status must match or exceed the original specification.

The substitute parts are grouped into two categories:

Direct Substitutes (SML-D12U1WT86, SML-D12U8WT86): These parts maintain the 620nm wavelength of the original SML-511UWT86 but operate at 2.2V forward voltage with increased brightness (63mcd). Both are from the active SML-D12 series with ROHS3 compliance and identical mechanical specifications.

Parametric Equivalents (SML-D12V1WT86, SML-D12V8WT86): These parts shift to 630nm wavelength while maintaining 40mcd brightness and 2.2V forward voltage. Both are from the active SML-D12 series with full compliance and identical mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

For 620nm Wavelength Requirement: Select SML-D12U1WT86 or SML-D12U8WT86. Both maintain the original 620nm dominant wavelength. The primary difference is packaging: SML-D12U1WT86 is supplied in Cut Tape (CT) & Digi-Reel®, while SML-D12U8WT86 is also available in Cut Tape (CT) & Digi-Reel®. Both parts are Active status with ROHS3 compliance and significantly higher inventory availability (493,820 and 30,300 units respectively).

For 40mcd Brightness Requirement: Select SML-D12V1WT86 or SML-D12V8WT86. Both maintain the original 40mcd brightness rating. These parts shift to 630nm wavelength. SML-D12V1WT86 is supplied in Tape & Reel (TR) with 4,100 units in stock, while SML-D12V8WT86 is supplied in Cut Tape (CT) & Digi-Reel® with 90,300 units in stock. Both are Active status with ROHS3 compliance.

For Increased Brightness: SML-D12U1WT86 and SML-D12U8WT86 provide 63mcd brightness (58% increase) while maintaining 620nm wavelength and 2.2V forward voltage. These are suitable for applications requiring enhanced luminous intensity.

All substitute parts maintain identical mechanical compatibility, MSL rating, and regulatory compliance with the original SML-511UWT86.

Frequently Asked Questions (FAQ)

Q: Can SML-D12U1WT86 and SML-D12U8WT86 be used interchangeably with SML-511UWT86?

A: Yes, both parts are direct substitutes. They maintain the 620nm wavelength and 40mcd brightness specification of the original part. The primary difference is forward voltage: SML-511UWT86 operates at 2V while SML-D12U1WT86 and SML-D12U8WT86 operate at 2.2V. Circuit design must accommodate this 0.2V increase in forward voltage. Both substitute parts are Active status with full ROHS3 compliance.

Q: What is the difference between SML-D12U1WT86 and SML-D12U8WT86?

A: Both parts are electrically and mechanically identical with 620nm wavelength and 63mcd brightness. The difference is packaging: SML-D12U1WT86 is supplied in Cut Tape (CT) & Digi-Reel®, and SML-D12U8WT86 is also supplied in Cut Tape (CT) & Digi-Reel®. Inventory levels differ (493,820 vs. 30,300 units).

Q: When should SML-D12V1WT86 or SML-D12V8WT86 be selected?

A: These parts are parametric equivalents suitable when wavelength shift from 620nm to 630nm is acceptable. They maintain the original 40mcd brightness and 2.2V forward voltage. Selection depends on application tolerance for wavelength variation and packaging preference: SML-D12V1WT86 is Tape & Reel (TR), while SML-D12V8WT86 is Cut Tape (CT) & Digi-Reel®.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts (SML-D12U1WT86, SML-D12U8WT86, SML-D12V1WT86, SML-D12V8WT86) are ROHS3 compliant with MSL rating of 3 (168 Hours) and REACH Unaffected status, matching the original SML-511UWT86 specification.

Q: What is the impact of forward voltage increase from 2V to 2.2V?

A: The 0.2V increase in forward voltage affects circuit design, particularly in current-limiting resistor calculations and power supply margin requirements. At 20mA test current, this represents a 10% increase in forward voltage. Circuit design must be verified to ensure adequate supply voltage headroom and proper LED current limiting.

Q: Are the mechanical dimensions identical across all parts?

A: Yes, all parts maintain identical mechanical specifications: 0603 (1608 Metric) package, 1.60mm L x 0.80mm W dimensions, 0.65mm maximum height, and Surface Mount mounting type. Direct PCB footprint compatibility is assured.