VAOL-S12YP4 Equivalent & Substitute Parts

Part Overview

The VAOL-S12YP4 is a yellow 589nm LED indication component manufactured by Visual Communications Company (VCC) in 1206 (3216 Metric) surface mount package. This discrete 2V LED is designed for standard indication applications with a clear colorless lens and 76mcd brightness rating. The product is classified as obsolete, necessitating identification of functionally equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

VAOL-S12YP4

Visual Communications Company - VCCIn Stock: 2997VAOL-S12YP4 Datasheet

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QTLP650CYTR

onsemiIn Stock: 1216QTLP650CYTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the VAOL-S12YP4 are identified based on strict electrical and mechanical parameter alignment within the yellow LED indication category. The substitution criteria are:

Primary Matching Parameters:

• Color: Yellow
• Wavelength - Dominant: 589nm (±1nm tolerance acceptable)
• Voltage - Forward (Vf): 2V
• Current - Test: 20mA
• Package / Case: 1206 (3216 Metric)
• Mounting Type: Surface Mount
• Lens Color: Colorless
• Lens Transparency: Clear
• Lens Style: Rectangle with Flat Top

Secondary Compatibility Parameters:

• Millicandela Rating: Within ±10% variance acceptable for indication applications
• Viewing Angle: ≥120° acceptable
• Physical dimensions: ±0.10mm tolerance on length and width
• Height (Max): ≤1.30mm

The QTLP650CYTR from onsemi meets all primary matching parameters and falls within acceptable secondary parameter ranges, qualifying it as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The QTLP650CYTR from onsemi qualifies as a functional equivalent to the VAOL-S12YP4 based on matching electrical specifications and package compatibility. Both components are classified as obsolete products, indicating limited future availability from either manufacturer.

Compliance Considerations:

• The VAOL-S12YP4 carries explicit ROHS3 compliance certification. The QTLP650CYTR compliance status is not specified in the provided data.
• Both components are REACH Unaffected, indicating no regulatory restriction on use.
• Both components carry EAR99 ECCN classification and identical HTSUS code 8541.41.0000.

Electrical Performance:

• Forward voltage and test current are identical at 2V and 20mA respectively.
• Dominant wavelength matches at 589nm, with peak wavelength variance of 1nm.
• Millicandela rating of the substitute (70mcd) is 92% of the main part (76mcd), acceptable for indication applications where brightness variance within this range does not affect functional performance.

Mechanical Compatibility:

• Both components use identical 1206 (3216 Metric) surface mount package.
• Physical dimensions are compatible with 0.10mm width variance on lens size and overall footprint.
• Height specifications are identical at 1.30mm maximum.
• Viewing angle of the substitute (140°) exceeds the main part (130°), providing wider light distribution.

Moisture Sensitivity:

• The QTLP650CYTR has MSL 1 (Unlimited), superior to the VAOL-S12YP4 MSL 3 (168 Hours), reducing moisture-related handling constraints during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can the QTLP650CYTR directly replace the VAOL-S12YP4 in existing designs?

A: Yes. The QTLP650CYTR meets all primary electrical and mechanical specifications for the VAOL-S12YP4. Both components operate at 2V forward voltage with 20mA test current, use identical 1206 surface mount packages, and emit yellow light at 589nm dominant wavelength. The 6mcd brightness difference (70mcd vs 76mcd) is within acceptable tolerance for indication applications.

Q: What is the significance of the MSL rating difference?

A: The QTLP650CYTR has MSL 1 (Unlimited moisture sensitivity level), compared to the VAOL-S12YP4 MSL 3 (168 hours). This means the substitute component has no time-based moisture absorption constraints during storage and can be exposed to ambient humidity indefinitely without requiring baking before assembly. The main part requires moisture bake-out if exposed to humidity for more than 168 hours.

Q: Are there dimensional concerns with the 0.10mm lens width difference?

A: No. The lens width variance of 0.10mm (1.50mm vs 1.60mm) is within standard manufacturing tolerance for 1206 package LEDs and does not affect PCB footprint compatibility or optical performance. Both components maintain identical 3.20mm length and 1.30mm maximum height.

Q: How does the wider viewing angle of the substitute affect application suitability?

A: The QTLP650CYTR viewing angle of 140° compared to the VAOL-S12YP4 130° provides broader light distribution. For indication applications, this wider angle is compatible and may improve visibility from off-axis viewing positions. No design modification is required.

Q: What compliance documentation should be verified before substitution?

A: Confirm that the QTLP650CYTR meets your specific RoHS compliance requirements. The VAOL-S12YP4 carries explicit ROHS3 certification. The substitute's RoHS status is not specified in available data and should be verified with the manufacturer if ROHS3 compliance is a design requirement. Both components are REACH Unaffected and carry identical EAR99 ECCN classification.

Q: Are both components still available for procurement?

A: Both the VAOL-S12YP4 and QTLP650CYTR are classified as obsolete products. Availability is limited to existing inventory. The VAOL-S12YP4 has 2925 pieces in stock, while the QTLP650CYTR has 1183 pieces available. Long-term procurement strategy should consider identifying next-generation yellow LED alternatives in active production status.

Q: What is the relationship between the QTLP650CYTR and the SML-LX1206SYC-TR listed in the data?

A: The SML-LX1206SYC-TR is identified as an additional substitute for the QTLP650CYTR base product (QTLP65). However, complete technical specifications for the SML-LX1206SYC-TR are not provided in the input data. Substitution compatibility with the VAOL-S12YP4 cannot be confirmed without full parameter documentation.