SML-LX1110USBC-ATR Equivalent & Substitute Parts

Part Overview

The SML-LX1110USBC-ATR is a TitanBrite™ Blue LED manufactured by Lumex Opto/Components Inc., designed for surface mount applications in 4-SMD, J-Lead packaging. This component operates at 470nm (Typ) wavelength with a forward voltage of 3.5V and maximum current rating of 350mA. The part is currently classified as Obsolete, necessitating identification of equivalent substitute components for ongoing production and maintenance applications. Active equivalent models are available to ensure design continuity and supply chain reliability.

Key Parameters

Parameter	Value	Unit
Color	Blue	—
Wavelength (Typ)	470	nm
Voltage - Forward (Vf) (Typ)	3.5	V
Current - Max	350	mA
Current - Test	350	mA
Mounting Type	Surface Mount	—
Package / Case	4-SMD, J-Lead	—
Size / Dimension	10.00 x 10.00	mm
Height - Seated (Max)	4.40	mm
RoHS Status	ROHS3 Compliant	—
MSL Rating	4 (72 Hours)	—

Substitute Part Grouping Explanation

Substitute parts for the SML-LX1110USBC-ATR are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Color: Blue
Wavelength: 470nm (Typ)
Voltage - Forward (Vf): 3.5V
Current - Max: 350mA
Mounting Type: Surface Mount
Package / Case: 4-SMD, J-Lead
Physical Dimensions: 10.00mm x 10.00mm
Height - Seated (Max): 4.40mm
RoHS Status: ROHS3 Compliant
MSL Rating: 4 (72 Hours)

The SML-LX1110USBC-BTR meets all critical electrical and mechanical parameters required for direct substitution. Variations in luminous flux (7lm vs 8lm) and efficiency (6 lm/W vs 7 lm/W) remain within acceptable tolerance ranges for this product category. The substitute part maintains identical package geometry, thermal characteristics, and regulatory compliance status.

Parameter Comparison

Parameter	SML-LX1110USBC-ATR (Main)	SML-LX1110USBC-BTR (Substitute)	Match Status
Manufacturer	Lumex Opto/Components Inc.	Lumex Opto/Components Inc.	Identical
Series	TitanBrite™	TitanBrite™	Identical
Color	Blue	Blue	Identical
Wavelength (Typ)	470nm	470nm	Identical
Voltage - Forward (Vf) (Typ)	3.5V	3.5V	Identical
Current - Max	350mA	350mA	Identical
Current - Test	350mA	350mA	Identical
Lumens/Watt @ Current - Test	7 lm/W	6 lm/W	Variation
Luminous Flux @ Current/Temperature	8lm (Typ)	7lm (Typ)	Variation
Temperature - Test	25°C	25°C	Identical
Viewing Angle	90°	120°	Variation
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	4-SMD, J-Lead	4-SMD, J-Lead	Identical
Size / Dimension	10.00 x 10.00mm	10.00 x 10.00mm	Identical
Height - Seated (Max)	4.40mm	4.40mm	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	4 (72 Hours)	4 (72 Hours)	Identical
Product Status	Obsolete	Active	Upgrade

Engineering Selection Recommendations

The SML-LX1110USBC-BTR is the qualified substitute for the obsolete SML-LX1110USBC-ATR. Selection is based on the following engineering criteria:

Regulatory Compliance: Both components maintain ROHS3 compliance and identical MSL ratings (4, 72 Hours), ensuring equivalent handling and storage requirements in manufacturing environments.

Product Status: The substitute part carries Active product status, providing assured long-term availability and supply chain continuity compared to the Obsolete main part.

Electrical Compatibility: Identical forward voltage (3.5V), maximum current rating (350mA), and wavelength specification (470nm Typ) ensure direct functional equivalence in circuit applications.

Mechanical Compatibility: Identical package geometry (4-SMD, J-Lead), physical dimensions (10.00 x 10.00mm), and seated height (4.40mm) confirm PCB layout and assembly process compatibility without design modification.

Performance Variations: The substitute exhibits a wider viewing angle (120° vs 90°) and slightly lower luminous flux (7lm vs 8lm) and efficiency (6 lm/W vs 7 lm/W). These variations remain within acceptable operational tolerances for standard blue LED applications and do not compromise functional performance in typical lighting circuits.

Frequently Asked Questions (FAQ)

Q: Can SML-LX1110USBC-BTR be used as a direct replacement for SML-LX1110USBC-ATR without circuit modification?

A: Yes. Both components share identical electrical specifications (3.5V forward voltage, 350mA maximum current, 470nm wavelength) and mechanical packaging (4-SMD, J-Lead, 10.00 x 10.00mm). No circuit redesign is required for substitution.

Q: What is the difference in viewing angle between these parts?

A: The main part (SML-LX1110USBC-ATR) has a 90° viewing angle, while the substitute (SML-LX1110USBC-BTR) has a 120° viewing angle. The wider viewing angle of the substitute may affect light distribution characteristics in applications requiring specific directional output.

Q: Are there differences in luminous output between these LEDs?

A: The main part produces 8lm (Typ) at 7 lm/W efficiency, while the substitute produces 7lm (Typ) at 6 lm/W efficiency. This represents approximately 12.5% lower luminous flux in the substitute. Applications with strict brightness requirements should evaluate this variation.

Q: Why is the main part classified as Obsolete?

A: The SML-LX1110USBC-ATR is listed as Obsolete by the manufacturer. The active substitute SML-LX1110USBC-BTR is recommended for new designs and ongoing production to ensure supply availability.

Q: Are the RoHS and MSL ratings identical?

A: Yes. Both components are ROHS3 compliant with MSL rating 4 (72 Hours), ensuring identical environmental compliance and moisture handling requirements.

Q: What is the base product number for these parts?

A: Both components are based on the SML-LX1110 platform, with the suffix designations (-USBC-ATR and -USBC-BTR) indicating specific performance and packaging variants within the TitanBrite™ series.

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