VAOL-S6YP4 Yellow LED 0603 SMD Equivalent & Substitute Parts

Part Overview

The VAOL-S6YP4 is a yellow LED indicator in 0603 (1608 Metric) surface mount package manufactured by Visual Communications Company (VCC). This component operates at 1.9V forward voltage with a 33mcd brightness rating and 591nm dominant wavelength. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing production, maintenance, and design continuity. Equivalent alternatives must maintain the same package footprint, mounting type, and core optical characteristics while accommodating minor variations in electrical performance within acceptable application tolerances.

Substiute Parts

VAOL-S6YP4

Visual Communications Company - VCCIn Stock: 1017VAOL-S6YP4 Datasheet

Current PartRFQ

5988040107F

DialightIn Stock: 264585988040107F Datasheet

DirectRFQ

QTLP601CYTR

Everlight Electronics Co LtdIn Stock: 934QTLP601CYTR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VAOL-S6YP4 are classified based on strict adherence to the following critical parameters:

Package Compatibility: All substitutes must use the 0603 (1608 Metric) surface mount package with identical footprint dimensions (1.60mm L x 0.80mm W) to ensure direct PCB compatibility without layout modifications.

Optical Characteristics: Yellow color emission with wavelength in the 589–593nm range (dominant wavelength) maintains visual consistency and application compatibility. Lens style (Rectangle with Flat Top) and lens transparency (Clear) must remain constant.

Electrical Parameters: Forward voltage (Vf) tolerance of 1.9V to 2.0V and test current of 10–20mA are acceptable within standard LED circuit design margins. Brightness rating (millicandela) variations are permitted provided the substitute meets or exceeds the original 33mcd specification.

Viewing Angle: 120° to 140° viewing angle range is acceptable for standard indication applications.

Compliance & Environmental: All substitutes must maintain ROHS3 compliance and EAR99 ECCN classification. Moisture Sensitivity Level (MSL) of 2 or 3 is acceptable for standard handling and storage conditions.

Parameter Comparison

Engineering Selection Recommendations

5988040107F (Dialight): This part is an active product with full manufacturer support. It meets all package and mounting requirements with identical 0603 footprint dimensions. The forward voltage increase from 1.9V to 2V is within standard LED circuit design tolerance and requires only minor resistor value adjustment in current-limiting circuits. The 140mcd brightness rating significantly exceeds the original 33mcd specification, providing enhanced visibility. The 140° viewing angle offers improved angular coverage. Height increases from 0.60mm to 0.70mm; verify clearance in constrained PCB assemblies. MSL rating of 3 (168 Hours) requires standard moisture control during storage and handling. This substitute is suitable for applications where increased brightness is acceptable or beneficial.

QTLP601CYTR (Everlight): This part is an active product with established supply chain availability. It maintains identical package footprint, height (0.60mm), and viewing angle (120°) to the original component. Forward voltage of 2V and test current of 20mA are within acceptable tolerance. The 35mcd brightness rating closely matches the original 33mcd specification, ensuring consistent visual indication performance. Wavelength of 589nm (dominant) is within the yellow spectrum range. MSL rating of 2 (1 Year) matches the original specification. This substitute provides the closest parametric equivalence to the VAOL-S6YP4 with minimal circuit redesign requirements.

Both substitutes are ROHS3 compliant and carry EAR99 ECCN classification, maintaining regulatory compliance. Selection between these two options depends on application requirements: choose QTLP601CYTR for closest parametric match and minimal circuit changes; choose 5988040107F for enhanced brightness and wider viewing angle with minor circuit adjustments.

Frequently Asked Questions (FAQ)

Q: Can the VAOL-S6YP4 be directly replaced with 5988040107F without PCB modifications?

A: The 0603 package footprint is identical, enabling direct PCB placement without layout changes. However, the forward voltage increase from 1.9V to 2V requires recalculation of the current-limiting resistor value to maintain proper LED operating current. The height increase from 0.60mm to 0.70mm must be verified against PCB assembly clearance constraints.

Q: What is the brightness difference between VAOL-S6YP4 and its substitutes?

A: The VAOL-S6YP4 operates at 33mcd. The 5988040107F provides 140mcd (4.2x brighter), while the QTLP601CYTR provides 35mcd (approximately equivalent). Brightness selection depends on application visibility requirements.

Q: Are there wavelength differences between the main part and substitutes?

A: The VAOL-S6YP4 has a dominant wavelength of 591nm. The 5988040107F operates at 593nm, and the QTLP601CYTR operates at 589nm. All three wavelengths fall within the yellow spectrum (589–593nm range) and are visually indistinguishable in standard indication applications.

Q: What is the impact of the forward voltage difference?

A: The VAOL-S6YP4 operates at 1.9V, while both substitutes operate at 2V. This 0.1V difference requires adjustment of the series current-limiting resistor. For a 5V supply with 10mA target current: original design uses approximately 310Ω; substitute design uses approximately 300Ω. This is a standard design adjustment within normal component tolerance ranges.

Q: Can both substitutes be used interchangeably in the same circuit?

A: Both substitutes are compatible with the same 0603 footprint and mounting type. However, they have different brightness ratings (140mcd vs. 35mcd). Use them interchangeably only if the application can tolerate the brightness variation. For consistent visual indication, select one substitute and maintain it throughout production.

Q: What are the moisture sensitivity implications?

A: The VAOL-S6YP4 has MSL 2 (1 Year shelf life). The 5988040107F has MSL 3 (168 Hours shelf life), requiring more frequent moisture bake-out cycles. The QTLP601CYTR has MSL 2 (1 Year), matching the original specification. For high-volume production with extended storage, QTLP601CYTR is preferred.

Q: Are there any compliance or regulatory differences?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. No regulatory barriers exist for substitution.

Q: Which substitute is recommended for new designs?

A: The QTLP601CYTR (Everlight) is recommended for new designs due to closest parametric equivalence, matching brightness rating, identical height, and MSL 2 rating. The 5988040107F is suitable when enhanced brightness is a design requirement.