SML-811UTT86C Equivalent & Substitute Parts

Part Overview

The SML-811UTT86C is a red LED indicator from Rohm Semiconductor's SML-811 series, designed for surface mount applications in 3412 metric packaging. This active product operates at 1.95V forward voltage with a dominant wavelength of 620nm and is qualified to AEC-Q101 automotive standards. Equivalent and substitute parts within this series maintain compatibility across critical electrical and mechanical parameters while offering alternative wavelength specifications and moisture sensitivity ratings.

Key Parameters

Parameter	Value
Manufacturer	Rohm Semiconductor
Series	SML-811
Color	Red
Wavelength - Dominant	620nm
Voltage - Forward (Vf) (Typ)	1.95V
Current - Test	10mA
Millicandela Rating	22.4mcd
Lens Size	1.25mm x 1.20mm
Package / Case	1305 (3412 Metric)
Mounting Type	Surface Mount, Bottom Entry
Height (Max)	1.20mm
RoHS Status	ROHS3 Compliant
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution within the SML-811 series is determined by the following critical parameters: forward voltage (1.95V), package type (1305/3412 Metric), mounting configuration (Surface Mount, Bottom Entry), lens dimensions (1.25mm x 1.20mm), and maximum height (1.20mm). All substitute parts maintain identical electrical characteristics and physical dimensions.

The primary differentiator among substitute parts is the dominant wavelength specification. SML-811UTT86 and SML-811UTT86C operate at 620nm, while SML-811VTT86A and SML-811VTT86C operate at 630nm. This wavelength difference does not affect electrical compatibility but may impact visual perception in applications requiring specific color matching.

Secondary differentiators include moisture sensitivity level (MSL) ratings and automotive qualification status. SML-811UTT86C and SML-811VTT86C carry MSL 3 (168 Hours) with AEC-Q101 qualification, while SML-811UTT86 carries standard MSL 3 without explicit automotive qualification. SML-811VTT86A carries MSL 2 (1 Year) with standard MSL rating.

Parameter Comparison

Parameter	SML-811UTT86C	SML-811UTT86	SML-811VTT86A	SML-811VTT86C
Manufacturer	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Series	SML-811	SML-811	SML-811	SML-811
Color	Red	Red	Red	Red
Wavelength - Dominant	620nm	620nm	630nm	630nm
Voltage - Forward (Vf) (Typ)	1.95V	1.95V	1.95V	1.95V
Current - Test	10mA	10mA	10mA	10mA
Millicandela Rating	22.4mcd	22.4mcd	22.4mcd	22.4mcd
Lens Size	1.25mm x 1.20mm	1.25mm x 1.20mm	1.25mm x 1.20mm	1.25mm x 1.20mm
Package / Case	1305 (3412 Metric)	1305 (3412 Metric)	1305 (3412 Metric)	1305 (3412 Metric)
Mounting Type	Surface Mount, Bottom Entry	Surface Mount, Bottom Entry	Surface Mount, Bottom Entry	Surface Mount, Bottom Entry
Height (Max)	1.20mm	1.20mm	1.20mm	1.20mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	2 (1 Year)	3 (168 Hours)
Grade	Automotive	Standard	Standard	Automotive
Qualification	AEC-Q101	None Listed	None Listed	AEC-Q101
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

For automotive applications requiring AEC-Q101 qualification, SML-811UTT86C and SML-811VTT86C are the appropriate selections. Both parts carry automotive grade designation and meet AEC-Q101 standards.

For applications where wavelength specification is critical at 620nm, SML-811UTT86C and SML-811UTT86 are direct equivalents. Both operate at the same dominant wavelength with identical electrical parameters.

For applications where wavelength specification is critical at 630nm, SML-811VTT86A and SML-811VTT86C are direct equivalents. Both operate at the same dominant wavelength with identical electrical parameters.

For applications with extended moisture exposure or storage requirements, SML-811VTT86A offers MSL 2 (1 Year) rating, providing superior moisture protection compared to MSL 3 alternatives.

All substitute parts maintain identical forward voltage (1.95V), test current (10mA), millicandela rating (22.4mcd), package dimensions, and mounting configuration. Selection between alternatives depends on wavelength requirement, automotive qualification necessity, and moisture sensitivity requirements specific to the application environment.

Frequently Asked Questions (FAQ)

Q: Can SML-811UTT86 replace SML-811UTT86C? A: SML-811UTT86 and SML-811UTT86C are parametrically equivalent with identical electrical characteristics and physical dimensions. Both operate at 620nm dominant wavelength and 1.95V forward voltage. The primary difference is automotive qualification status; SML-811UTT86C carries AEC-Q101 qualification while SML-811UTT86 does not. Selection depends on automotive compliance requirements.

Q: What is the difference between 620nm and 630nm wavelength variants? A: SML-811UTT86C and SML-811UTT86 operate at 620nm dominant wavelength, while SML-811VTT86A and SML-811VTT86C operate at 630nm. This wavelength difference affects the perceived color of the LED indication. Both wavelengths are classified as red but produce slightly different hues. Electrical parameters remain identical across all variants.

Q: Are all substitute parts compatible with the same PCB footprint? A: Yes. All substitute parts share identical package specifications (1305/3412 Metric), mounting type (Surface Mount, Bottom Entry), lens dimensions (1.25mm x 1.20mm), and maximum height (1.20mm). Direct PCB footprint compatibility is maintained across all variants.

Q: Which substitute part offers the best moisture protection? A: SML-811VTT86A carries MSL 2 (1 Year) rating, providing superior moisture protection compared to SML-811UTT86C, SML-811UTT86, and SML-811VTT86C, which all carry MSL 3 (168 Hours) rating. MSL 2 allows extended storage and handling in humid environments.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts carry ROHS3 Compliant status and are REACH Unaffected, meeting environmental regulatory requirements.

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