AY1111C-TR LED Yellow Diffused 0603 SMD Equivalent & Substitute Parts

Part Overview

The AY1111C-TR is a yellow diffused LED manufactured by Stanley Electric Co, designed for indication applications in 0603 (1608 Metric) surface mount packages. This component operates at 2.2V forward voltage with a 590nm dominant wavelength and 3.4mcd brightness rating. The part is classified as obsolete, making identification of functionally equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while considering current product availability and compliance status.

Substiute Parts

AY1111C-TR

Stanley Electric CoIn Stock: 1376AY1111C-TR Datasheet

Current PartRFQ

FY1111C-2005-TR

Stanley Electric CoIn Stock: 34146FY1111C-2005-TR Datasheet

SimilarRFQ

5975412402F

DialightIn Stock: 11095975412402F Datasheet

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5975412407F

DialightIn Stock: 69685975412407F Datasheet

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QTLP600C3TR

onsemiIn Stock: 818QTLP600C3TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AY1111C-TR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Package / Case: 0603 (1608 Metric) form factor
• Mounting Type: Surface Mount
• Size / Dimension: 1.60mm L x 0.80mm W (mechanical fit requirement)
• Wavelength - Dominant: 590nm yellow spectrum (color match)
• Lens Transparency: Diffused (optical characteristic match)
• Voltage - Forward (Vf): Operating range compatible with 2.2V nominal
• Current - Test: 20mA standard test condition

Secondary Compatibility Considerations:

• Millicandela Rating: Brightness within acceptable range for indication applications
• Viewing Angle: Optical performance parameter
• Moisture Sensitivity Level (MSL): Environmental handling requirement
• RoHS and REACH Compliance: Regulatory compliance status

Substitute parts are grouped based on adherence to these parameters. Parts maintaining identical wavelength (590nm), color (yellow), lens type (diffused), and package specifications are classified as direct functional equivalents. Parts with alternative wavelengths (yellow-green 572nm) or lens characteristics (clear vs. diffused) are classified as functional alternatives with noted parameter deviations.

Parameter Comparison

Engineering Selection Recommendations

FY1111C-2005-TR (Stanley Electric Co)

This substitute maintains manufacturer continuity with the original AY1111C-TR. Both components are from Stanley Electric Co and share the same 0603 (1608 Metric) package specification. FY1111C-2005-TR is classified as Active product status, ensuring ongoing availability and supply chain stability. The part carries ROHS3 compliance certification and maintains identical MSL rating (4, 72 Hours). Detailed electrical and optical parameters are not fully specified in available documentation; however, the shared manufacturer lineage and identical package designation indicate functional compatibility. This option is preferred for applications requiring manufacturer consistency and maximum supply availability (34,100 units in stock).

5975412402F and 5975412407F (Dialight)

Both Dialight parts (5975412402F in Strip packaging and 5975412407F in Tape & Reel packaging) are functionally equivalent alternatives with documented specifications. These components operate at 2.1V forward voltage (0.1V lower than AY1111C-TR) and feature yellow-green wavelength at 572nm (compared to 590nm yellow). Both maintain 0603 (1608 Metric) package compatibility, diffused lens transparency, and 20mA test current. Brightness rating is higher at 11.7mcd versus 3.4mcd. Viewing angle is wider at 152° versus 138°/137°. Both parts carry ROHS3 compliance and feature improved MSL rating (3, 168 Hours). These substitutes are suitable for applications where yellow-green spectral output is acceptable and higher brightness is beneficial. 5975412407F in Tape & Reel format offers superior inventory availability (6,924 units).

QTLP600C3TR (onsemi)

This onsemi component matches the original AY1111C-TR in color (yellow) and wavelength (590nm), maintaining spectral compatibility. However, QTLP600C3TR features clear lens transparency rather than diffused, resulting in different optical characteristics. Forward voltage is lower at 2.0V, and brightness is higher at 9mcd. Viewing angle is significantly narrower at 100° versus 138°/137°. The part is classified as obsolete, matching the original part status. MSL rating is superior (2, 1 Year). Mechanical dimensions are identical (1.60mm L x 0.80mm W, 0.80mm height). This substitute is applicable only when clear lens transparency is functionally acceptable and narrower viewing angle does not compromise application requirements.

Frequently Asked Questions (FAQ)

Q: Can FY1111C-2005-TR directly replace AY1111C-TR without circuit modification?

A: FY1111C-2005-TR shares identical package specification (0603 1608 Metric), mounting type (Surface Mount), and manufacturer (Stanley Electric Co). Both components are designed for 20mA test current and identical MSL handling. Direct substitution is supported from a mechanical and thermal standpoint. Electrical parameter verification is recommended due to incomplete specification documentation for FY1111C-2005-TR.

Q: What is the primary difference between the Dialight substitutes (5975412402F vs. 5975412407F)?

A: Both Dialight parts are electrically and optically identical. The distinction is packaging format: 5975412402F is supplied in Strip packaging, while 5975412407F is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and inventory management. 5975412407F offers higher stock availability (6,924 units versus 1,093 units).

Q: Are the Dialight yellow-green LEDs (572nm) suitable replacements for the yellow AY1111C-TR (590nm)?

A: Dialight parts 5975412402F and 5975412407F operate at 572nm yellow-green wavelength, which differs from the original 590nm yellow specification. Substitution is valid only when application requirements permit yellow-green spectral output. The 0.1V lower forward voltage (2.1V vs. 2.2V) and higher brightness (11.7mcd vs. 3.4mcd) may require circuit verification. Wider viewing angle (152° vs. 138°/137°) provides enhanced optical distribution.

Q: Why does QTLP600C3TR have a clear lens instead of diffused?

A: QTLP600C3TR is manufactured by onsemi with different optical design specifications. Clear lens transparency produces focused, directional light output, whereas diffused lenses scatter light over a broader area. This fundamental difference affects light distribution patterns and is not interchangeable without application-specific evaluation. QTLP600C3TR is suitable only when narrow, focused light output is functionally acceptable.

Q: What does MSL rating mean, and why do the substitutes have different ratings?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before soldering. AY1111C-TR and FY1111C-2005-TR are rated MSL 4 (72 hours maximum exposure). Dialight parts are MSL 3 (168 hours), and QTLP600C3TR is MSL 2 (1 year). Higher MSL ratings provide longer shelf life and more flexible handling. Lower MSL ratings require stricter environmental controls during storage and assembly.

Q: Are all substitute parts RoHS compliant?

A: FY1111C-2005-TR, 5975412402F, and 5975412407F carry explicit ROHS3 compliance certification. AY1111C-TR and QTLP600C3TR do not have specified RoHS status in available documentation. For applications requiring RoHS compliance verification, Dialight and Stanley Electric Co active-status parts (FY1111C-2005-TR, 5975412402F, 5975412407F) are recommended.

Q: Can I use QTLP600C3TR as a direct mechanical replacement despite the clear lens?

A: QTLP600C3TR maintains identical mechanical dimensions (1.60mm L x 0.80mm W, 0.80mm height) and 0603 (1608 Metric) package specification, enabling direct PCB placement. However, the clear lens produces fundamentally different optical output compared to the diffused lens of AY1111C-TR. Substitution is valid only when application requirements explicitly permit clear lens transparency and narrower viewing angle (100° vs. 138°/137°).

Q: Which substitute offers the best long-term availability?

A: FY1111C-2005-TR (Stanley Electric Co) is classified as Active product status with the highest inventory level (34,100 units), ensuring sustained supply chain availability. Dialight parts 5975412402F and 5975412407F are also Active status with substantial inventory (1,093 and 6,924 units respectively). Both AY1111C-TR and QTLP600C3TR are classified as Obsolete, indicating limited future availability.