SML-512UWT86 Equivalent & Substitute Parts

Part Overview

The SML-512UWT86 is a red diffused LED in 0603 (1608 Metric) surface mount package manufactured by Rohm Semiconductor. This component is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. The part operates at 2V forward voltage with a 63mcd brightness rating and 624nm dominant wavelength, designed for LED indication applications in discrete circuit configurations.

Due to its discontinued status for new designs, equivalent substitute parts from the same manufacturer are available to maintain design compatibility while ensuring access to actively supported components.

Key Parameters

Parameter	Value
Package / Case	0603 (1608 Metric)
Mounting Type	Surface Mount
Color	Red
Lens Transparency	Diffused
Lens Color	White
Millicandela Rating	63mcd
Lens Style	Rectangle with Flat Top
Lens Size	1.20mm x 0.80mm
Current - Test	20mA
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the SML-512UWT86 is determined by strict equivalence across the following critical parameters:

Package / Case: 0603 (1608 Metric) surface mount
Physical dimensions: 1.60mm L x 0.80mm W, 0.65mm max height
Color and lens configuration: Red diffused with white lens
Optical output: 63mcd brightness rating
Electrical operation: 20mA test current
Environmental compliance: ROHS3 Compliant, MSL 3 (168 Hours)

The substitute parts SML-D12U1WT86 and SML-D12U8WT86 maintain identical mechanical, optical, and compliance specifications. Variations in forward voltage (2.2V vs. 2V) and wavelength (620nm vs. 624nm) fall within acceptable tolerances for red LED indication circuits and do not preclude functional substitution in standard applications.

Parameter Comparison

Parameter	SML-512UWT86	SML-D12U1WT86	SML-D12U8WT86
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Package / Case	0603 (1608 Metric)	0603 (1608 Metric)	0603 (1608 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Color	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused
Lens Color	White	White	White
Millicandela Rating	63mcd	63mcd	63mcd
Lens Style	Rectangle with Flat Top	Rectangle with Flat Top	Rectangle with Flat Top
Lens Size	1.20mm x 0.80mm	1.20mm x 0.80mm	1.20mm x 0.80mm
Size / Dimension	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W	1.60mm L x 0.80mm W
Height (Max)	0.65mm	0.65mm	0.65mm
Voltage - Forward (Vf) (Typ)	2V	2.2V	2.2V
Current - Test	20mA	20mA	20mA
Wavelength - Dominant	624nm	620nm	620nm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Not For New Designs	Active	Active

Engineering Selection Recommendations

The SML-D12U1WT86 and SML-D12U8WT86 are direct functional equivalents for the SML-512UWT86 in LED indication applications. Both substitute parts are classified as Active products, ensuring continued manufacturer support and supply availability.

Selection between the two substitute options depends on packaging requirements: SML-D12U1WT86 is supplied in Cut Tape (CT) & Digi-Reel® format, while SML-D12U8WT86 is also available in Cut Tape (CT) & Digi-Reel® format. Both maintain identical electrical and optical specifications.

The 0.2V increase in forward voltage (2V to 2.2V) and 4nm shift in dominant wavelength (624nm to 620nm) are within standard manufacturing tolerances for red LED components and do not affect circuit compatibility in standard current-limiting resistor configurations.

All three parts maintain ROHS3 compliance and MSL 3 (168 Hours) moisture sensitivity ratings, ensuring equivalent environmental performance and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SML-D12U1WT86 or SML-D12U8WT86 be used as direct replacements for SML-512UWT86?

A: Yes. Both substitute parts maintain identical package dimensions (0603/1608 Metric), mounting type (surface mount), optical output (63mcd), and environmental compliance specifications. The parts are mechanically and electrically compatible for LED indication circuits.

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

A: Both parts share identical electrical and optical specifications. The primary difference is the series designation (SML-D12 vs. EXCELED™) and packaging format, though both are supplied in Cut Tape (CT) & Digi-Reel® format. Selection should be based on supplier availability and internal part management requirements.

Q: Does the 0.2V forward voltage difference affect circuit design?

A: No. The increase from 2V to 2.2V forward voltage is accommodated by standard current-limiting resistor calculations. Circuit designs using the original SML-512UWT86 require no modification when substituting either equivalent part.

Q: Are there any handling or storage differences between these parts?

A: No. All three parts share identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours), requiring the same storage and handling procedures.

Q: Why is SML-512UWT86 marked as Not For New Designs?

A: The SML-512UWT86 has been superseded in the manufacturer's product lifecycle. The active substitute parts SML-D12U1WT86 and SML-D12U8WT86 provide equivalent functionality with continued manufacturer support for new designs.

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