LB A6SG-S1T2-35-Z Equivalent & Substitute Parts

Part Overview

The LB A6SG-S1T2-35-Z is a blue LED indication component manufactured by ams-OSRAM USA INC. in the SIDELED® series. This surface-mount, right-angle LED features a 2.40mm round lens with flat top and operates at 3.2V forward voltage with a dominant wavelength of 470nm. The product is classified as obsolete, necessitating identification of active equivalent components for continued system design and procurement.

Substiute Parts

LB A6SG-S1T2-35-Z

ams-OSRAM USA INC.In Stock: 1156LB A6SG-S1T2-35-Z Datasheet

Current PartRFQ

AA4040QBS/G

KingbrightIn Stock: 905AA4040QBS/G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LB A6SG-S1T2-35-Z is determined by the following critical parameters:

Optical Characteristics: Blue color specification with wavelength range compatibility (dominant wavelength 465nm–470nm, peak wavelength 461nm–465nm)

Electrical Characteristics: Forward voltage tolerance (3.2V–3.3V), test current of 20mA, and luminous intensity within acceptable range (315mcd–350mcd)

Mechanical Compatibility: 2-SMD Boomerang package configuration, 2.40mm diameter round lens with flat top, 120° viewing angle, surface-mount right-angle mounting, and physical dimensions (4.00mm L x 3.60mm W, height 4.10mm–4.20mm)

Compliance Requirements: ROHS3 compliance and EAR99 ECCN classification

The substitute part AA4040QBS/G from Kingbright meets all specified parameters within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

The AA4040QBS/G from Kingbright is a direct functional equivalent to the obsolete LB A6SG-S1T2-35-Z. Selection of this substitute is supported by the following factors:

Product Status: The AA4040QBS/G maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete original component.

Compliance Alignment: Both components maintain ROHS3 compliance and EAR99 ECCN classification, satisfying regulatory requirements without modification to system documentation or certification.

Electrical Compatibility: The forward voltage differential of 0.1V (3.2V to 3.3V) falls within standard circuit design tolerances for LED indication applications. The increased luminous intensity (350mcd versus 315mcd) provides enhanced optical performance without requiring circuit redesign.

Mechanical Interchangeability: Identical package configuration, lens geometry, mounting orientation, and physical footprint ensure direct PCB-level substitution without layout modification.

Packaging Consideration: The substitute is supplied in Tape & Reel format, standard for production environments, compared to the original component's unspecified packaging.

Frequently Asked Questions (FAQ)

Q: Can the AA4040QBS/G replace the LB A6SG-S1T2-35-Z in existing designs?

A: Yes. The AA4040QBS/G is mechanically and electrically compatible. Identical package configuration, lens specifications, and mounting type enable direct substitution on existing PCB layouts without modification.

Q: What is the forward voltage difference, and does it affect circuit operation?

A: The AA4040QBS/G operates at 3.3V compared to the original 3.2V. This 0.1V difference is within standard design tolerance for LED indication circuits and does not require current-limiting resistor recalculation for typical applications.

Q: Are there differences in optical performance?

A: The AA4040QBS/G provides 350mcd compared to the original 315mcd, representing approximately 11% increased brightness. Dominant wavelength shifts from 470nm to 465nm, remaining within the blue spectrum range. Both components maintain 120° viewing angle and identical lens geometry.

Q: What is the impact of the height difference (4.10mm versus 4.20mm)?

A: The AA4040QBS/G is 0.10mm shorter. This difference is negligible for standard PCB assembly and does not affect component clearance or mechanical fit in typical applications.

Q: Does the substitute require any design or certification changes?

A: No. Both components maintain ROHS3 compliance and EAR99 classification. No modifications to system documentation, certifications, or regulatory filings are required.

Q: What is the difference between the packaging formats?

A: The original component packaging is unspecified. The AA4040QBS/G is supplied in Tape & Reel format, the standard for high-volume SMD assembly operations, improving handling efficiency and reducing component damage during manufacturing.

Q: Are there any wavelength compatibility concerns?

A: No. The dominant wavelength shift from 470nm to 465nm and peak wavelength shift from 465nm to 461nm remain within the blue LED spectrum. Both components are visually indistinguishable in indication applications.