VAOL-3HAE4 Equivalent & Substitute Parts Reference

Part Overview

The VAOL-3HAE4 is a red LED indication component manufactured by Visual Communications Company (VCC). This discrete through-hole LED operates at 1.8V forward voltage with a dominant wavelength of 643nm and delivers 150 millicandela brightness. The product is classified as obsolete, making identification of functionally equivalent substitute parts essential for design continuity and procurement planning. Active substitute components maintain the same electrical operating parameters and mechanical form factor while offering improved availability and extended product lifecycle support.

Substiute Parts

VAOL-3HAE4

Visual Communications Company - VCCIn Stock: 921VAOL-3HAE4 Datasheet

Current PartRFQ

TLDR4900

Vishay Semiconductor Opto DivisionIn Stock: 4627TLDR4900 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VAOL-3HAE4 are identified based on strict alignment of the following critical parameters:

Electrical Compatibility:

• Forward voltage (Vf) of 1.8V nominal
• Test current of 20mA
• Red color wavelength in the 643–650nm range

Mechanical Compatibility:

• 3mm lens diameter (T-1 form factor)
• Through-hole radial mounting configuration
• Round domed lens style

Regulatory & Compliance Alignment:

• ROHS3 compliance certification
• REACH unaffected status
• EAR99 export classification

The TLDR4900 manufactured by Vishay Semiconductor Opto Division meets all substitution criteria. While the TLDR4900 exhibits higher brightness (200mcd versus 150mcd) and slightly different peak wavelength characteristics (648nm dominant, 650nm peak versus 643nm), these parameters remain within acceptable tolerance for red LED indication applications. The substitute part maintains identical forward voltage and test current specifications, ensuring direct circuit compatibility without modification to current-limiting resistor values or power supply design.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TLDR4900

The TLDR4900 is the qualified substitute for the obsolete VAOL-3HAE4. Selection is based on the following engineering criteria:

Electrical Compatibility: Both components operate at identical forward voltage (1.8V) and test current (20mA). Existing circuit designs require no modification to current-limiting resistor values or power supply specifications.

Mechanical Compatibility: Both components feature 3mm through-hole radial mounting with round domed lens configuration. PCB layout and mechanical assembly procedures remain unchanged.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements for the same application domains.

Product Lifecycle: The TLDR4900 is actively produced by Vishay Semiconductor Opto Division, ensuring long-term availability and supply chain continuity compared to the obsolete VAOL-3HAE4.

Physical Dimension Consideration: The TLDR4900 maximum height is 6.40mm compared to 5.10mm for the VAOL-3HAE4. Verify clearance in applications with height-constrained PCB layouts or enclosure designs.

Brightness Differential: The TLDR4900 delivers 200mcd versus 150mcd for the VAOL-3HAE4. In applications where brightness is visually critical, the increased output may alter perceived indication intensity. In standard indication applications, this difference is typically imperceptible.

Frequently Asked Questions (FAQ)

Q: Can the TLDR4900 be used as a direct replacement for the VAOL-3HAE4 without circuit modification?

A: Yes. Both components share identical forward voltage (1.8V) and test current (20mA) specifications. Current-limiting resistor values and power supply design remain unchanged. No circuit modification is required for electrical compatibility.

Q: What is the significance of the 1.30mm height difference between these components?

A: The TLDR4900 is 1.30mm taller (6.40mm maximum height versus 5.10mm). In PCB designs with tight vertical clearance constraints, enclosure height limitations, or stacked component arrangements, this difference must be verified against mechanical design specifications. Standard indication applications typically accommodate this variation without issue.

Q: Why does the TLDR4900 have higher brightness (200mcd versus 150mcd)?

A: The TLDR4900 is engineered with higher light output efficiency. In indication applications, this increased brightness does not create functional incompatibility. Visual perception of red LED indication remains consistent across this brightness range in typical ambient lighting conditions.

Q: Are the wavelength differences (643nm versus 648nm dominant) significant for color matching?

A: Both wavelengths fall within the red spectrum and are visually indistinguishable to the human eye. The TLDR4900 peak wavelength of 650nm is within standard red LED specifications. Color matching is not affected for indication applications.

Q: What is the advantage of the TLDR4900's improved Moisture Sensitivity Level (MSL 1 versus MSL 2)?

A: The TLDR4900 has unlimited shelf life under controlled storage conditions, compared to 1-year shelf life for the VAOL-3HAE4. This provides extended procurement flexibility and reduced risk of moisture-induced component degradation during inventory management.

Q: Are both components compliant with current environmental regulations?

A: Yes. Both the VAOL-3HAE4 and TLDR4900 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Can the TLDR4900 be used in applications originally designed for the VAOL-3HAE4?

A: Yes, provided mechanical clearance is verified for the 1.30mm height difference. Electrical specifications are identical, and regulatory compliance is maintained. Standard indication applications present no compatibility issues.