FLA3864X LED Orange Clear Round T/H Equivalent & Substitute Parts

Part Overview

The FLA3864X is an orange LED indication component manufactured by Stanley Electric Co, designed for through-hole mounting applications. This discrete LED features a 603nm dominant wavelength with 350mcd brightness rating and operates at 1.9V forward voltage. The component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The FLA3864X is RoHS Compliant and REACH Unaffected, meeting current environmental compliance standards.

Substiute Parts

FLA3864X

Stanley Electric CoIn Stock: 1152FLA3864X Datasheet

Current PartRFQ

SLI-343D8C3F

Rohm SemiconductorIn Stock: 25396SLI-343D8C3F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLA3864X is determined by the following critical parameters that must align between the main part and substitute candidates:

Primary Compatibility Criteria:

• Color: Orange
• Lens Size: 3.10mm Dia
• Lens Style: Round with Domed Top
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Package / Case: Radial
• Wavelength Range: Orange spectrum (603nm–608nm dominant)

Secondary Consideration Parameters:

• Millicandela Rating: 350mcd (baseline brightness)
• Voltage - Forward (Vf): 1.9V (baseline operating voltage)
• Current - Test: 10mA (baseline test current)
• Height (Max): 6.10mm (physical envelope)

The substitute part SLI-343D8C3F from Rohm Semiconductor meets the primary compatibility criteria across all physical and optical parameters. Variations in secondary parameters (brightness, voltage, and test current) are within acceptable engineering tolerances for LED indication applications and do not preclude functional substitution in standard circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SLI-343D8C3F

The SLI-343D8C3F from Rohm Semiconductor is the qualified substitute for the obsolete FLA3864X. This part maintains identical physical form factor (3.10mm lens diameter, round domed top, clear orange lens, through-hole radial package) and operates within the orange LED wavelength specification (605nm dominant vs. 603nm original).

The substitute part carries Active product status, ensuring long-term availability and supply chain continuity. Both parts meet current environmental compliance requirements: the substitute achieves ROHS3 Compliant status (enhanced RoHS compliance) and maintains REACH Unaffected designation.

Parameter Variance Considerations:

The SLI-343D8C3F exhibits higher brightness (680mcd vs. 350mcd), elevated forward voltage (2.2V vs. 1.9V), and increased test current (20mA vs. 10mA). These variations reflect modern LED technology improvements and do not prevent functional substitution in standard indication circuits. Circuit designers must verify that existing current-limiting resistor values and power supply specifications accommodate the higher operating parameters.

The substitute part is marginally shorter (5.60mm vs. 6.10mm maximum height), which presents no mechanical interference concerns in standard through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SLI-343D8C3F directly replace the FLA3864X without circuit modification?

A: Physical and optical compatibility is confirmed. However, the higher forward voltage (2.2V vs. 1.9V) and test current (20mA vs. 10mA) require verification of existing current-limiting resistor values. Recalculation of series resistor values is necessary to maintain proper LED operating conditions in the target circuit.

Q: What is the wavelength difference between these parts, and does it affect visual appearance?

A: The dominant wavelength difference is 2nm (603nm vs. 605nm). Both wavelengths fall within the orange LED spectrum and produce visually indistinguishable orange light output in indication applications. This variance is within standard LED manufacturing tolerances.

Q: Why is the substitute part brighter (680mcd vs. 350mcd)?

A: The SLI-343D8C3F represents current-generation LED technology with improved luminous efficiency. Higher brightness is a characteristic of modern orange LEDs and does not preclude substitution. Circuit design must account for increased light output if visual consistency with original design intent is required.

Q: Are there any height clearance concerns with the SLI-343D8C3F?

A: The substitute part is 0.50mm shorter (5.60mm vs. 6.10mm maximum height). This dimensional reduction presents no mechanical interference issues in standard through-hole PCB applications and may provide additional clearance in space-constrained designs.

Q: Do both parts meet current environmental compliance standards?

A: Yes. The FLA3864X is RoHS Compliant and REACH Unaffected. The SLI-343D8C3F achieves enhanced ROHS3 Compliant status and maintains REACH Unaffected designation, meeting or exceeding current regulatory requirements.

Q: What is the packaging difference between these parts?

A: The FLA3864X is supplied in standard packaging. The SLI-343D8C3F is supplied in Bulk packaging. Both parts are identical in component form and function; packaging designation reflects supplier distribution format only.

Q: Is the SLI-343D8C3F available in sufficient quantity for production?

A: The SLI-343D8C3F maintains 25,344 pieces in new original stock, providing substantial availability for production requirements and design transitions from the obsolete FLA3864X.