VAOS-SP4W4 Equivalent & Substitute Parts Reference

Part Overview

The VAOS-SP4W4 is a cool white LED indication component manufactured by Visual Communications Company (VCC), designed for surface mount applications in 4-SMD, J-Lead packaging. This part operates at 3.5V forward voltage with a 120° viewing angle and features a round flat-top lens configuration. The component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

VAOS-SP4W4

Visual Communications Company - VCCIn Stock: 1102VAOS-SP4W4 Datasheet

Current PartRFQ

EAPL3527WA7

Everlight Electronics Co LtdIn Stock: 792EAPL3527WA7 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VAOS-SP4W4 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Mounting Type: Surface Mount (required match)
• Package / Case: 4-SMD, J-Lead (required match)
• Footprint Dimensions: 3.50mm L x 2.70mm W (required match)
• Voltage - Forward (Vf): 3.5V ±0.1V tolerance range
• Viewing Angle: 120° (required match)
• Color: White (required match)
• RoHS Compliance: ROHS3 Compliant (required match)

Secondary Consideration Parameters:

• Current - Test: 150mA nominal (acceptable variance within circuit design limits)
• Height (Max): Physical clearance dependent on application
• Lens Style: Round with Flat Top (required match)

The EAPL3527WA7 from Everlight Electronics Co Ltd is evaluated against these criteria for substitution feasibility.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility Assessment:

The EAPL3527WA7 demonstrates compatibility with the VAOS-SP4W4 in the following areas:

• Mechanical Compatibility: Identical footprint dimensions (3.50mm L x 2.70mm W) and matching 4-SMD, J-Lead package configuration enable direct PCB layout compatibility.
• Electrical Compatibility: Forward voltage differential of 0.1V (3.4V vs 3.5V) falls within acceptable circuit design tolerance for LED indication applications.
• Optical Compatibility: Matching 120° viewing angle and round flat-top lens style preserve intended optical performance characteristics.
• Regulatory Compliance: Both components maintain ROHS3 compliance and identical ECCN/HTSUS classifications, supporting equivalent regulatory status.
• Production Status: The substitute part is in active production, ensuring long-term availability and supply chain continuity.

Critical Design Considerations:

The EAPL3527WA7 exhibits the following parameter variances requiring design review:

• Height Differential: Maximum height increases from 1.10mm to 1.65mm (+0.55mm). PCB clearance and assembly constraints must be verified for the specific application.
• Test Current Variance: Rated test current of 30mA versus 150mA indicates different operational characteristics. Circuit current limiting design must accommodate this specification.
• Moisture Sensitivity Level: MSL rating changes from 2 (1 Year) to 3 (168 Hours), affecting storage and handling requirements during manufacturing.

Compliance Status:

Both components satisfy identical export control classifications (EAR99) and tariff codes (8541.41.0000), supporting equivalent regulatory treatment in procurement and logistics operations.

Frequently Asked Questions (FAQ)

Q: Can the EAPL3527WA7 be used as a direct replacement for the VAOS-SP4W4 on existing PCBs?

A: Mechanical and electrical compatibility exists for the footprint and basic LED function. However, the increased height (1.65mm vs 1.10mm) must be verified against PCB clearance requirements. Circuit design must accommodate the 30mA test current specification of the substitute part.

Q: What is the significance of the 0.1V forward voltage difference between these parts?

A: The forward voltage differential (3.5V vs 3.4V) is within typical LED tolerance ranges and does not require circuit redesign for indication applications. Current limiting resistor values may require minor adjustment based on specific circuit design parameters.

Q: Why does the EAPL3527WA7 have a lower test current rating (30mA vs 150mA)?

A: Test current specifications reflect manufacturer characterization conditions and do not necessarily indicate reduced operational capability. The substitute part's actual operating current is determined by circuit design and current limiting components. Design verification is required to confirm suitability for the intended application.

Q: Are there packaging differences between the 4-PLCC and 3-PLCC designations?

A: The supplier device package designation (4-PLCC vs 3-PLCC) reflects internal manufacturer packaging classifications. Both parts share identical external footprint dimensions (3.50mm L x 2.70mm W) and 4-SMD, J-Lead case configuration, ensuring PCB compatibility.

Q: What is the impact of the MSL rating change from 2 to 3?

A: Moisture Sensitivity Level 3 (168 Hours) is more restrictive than MSL 2 (1 Year), requiring shorter storage periods in controlled humidity conditions before soldering. Manufacturing and warehouse handling procedures must be adjusted to comply with the more stringent MSL 3 requirements.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the VAOS-SP4W4 and EAPL3527WA7 are ROHS3 compliant and classified under identical ECCN (EAR99) and HTSUS (8541.41.0000) codes, supporting equivalent regulatory treatment in procurement and international trade operations.

Q: Is the EAPL3527WA7 suitable for applications requiring the cool white color specification?

A: The EAPL3527WA7 is specified as white color. The original part's cool white designation (6300K) is not explicitly stated for the substitute. Color temperature compatibility should be verified against specific application requirements if precise color matching is critical.