LED AMBER DIFFUSED T-1 T/H 4303F3 Equivalent & Substitute Parts

Part Overview

The 4303F3 is an amber LED indicator manufactured by Visual Communications Company (VCC) designed for through-hole mounting applications. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production requirements. The 4303F3 operates at a forward voltage of 1.9V with a 10mA test current and features a diffused amber lens in a standard T-1 3mm package with radial leads. Identification of compatible substitutes ensures design continuity and supply chain flexibility.

Substiute Parts

4303F3

Visual Communications Company - VCCIn Stock: 11974303F3 Datasheet

Current PartRFQ

HLMP-NL06

Broadcom LimitedIn Stock: 32868HLMP-NL06 Datasheet

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SSL-LX3044AD

Lumex Opto/Components Inc.In Stock: 10868SSL-LX3044AD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4303F3 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Color: Amber
• Lens Size: 3mm, T-1
• Mounting Type: Through Hole
• Package Configuration: Radial
• Viewing Angle: 60°
• RoHS Compliance: ROHS3 Compliant

Secondary Electrical Considerations:

• Forward Voltage (Vf): Range 1.9V to 2.1V
• Test Current: 10mA to 20mA
• Wavelength - Peak: 590nm to 605nm

Mechanical Compatibility:

• Height (Max): 4.60mm to 6.40mm
• Lens Style: Round with Domed Top
• Configuration: Standard

The two identified substitutes, HLMP-NL06 and SSL-LX3044AD, meet all primary compatibility criteria. Both are amber T-1 through-hole LEDs with radial packages, 60° viewing angles, and ROHS3 compliance. Electrical parameters fall within acceptable ranges for circuit redesign consideration. Lens transparency differs between substitutes (clear vs. diffused), requiring application-specific evaluation.

Parameter Comparison

Engineering Selection Recommendations

HLMP-NL06 (Broadcom Limited):

• Active product status ensures long-term availability and supply chain stability
• ROHS3 compliant with REACH unaffected status
• Clear lens transparency differs from the diffused 4303F3; suitable for applications requiring higher light transmission and brightness perception
• Forward voltage of 2.02V requires circuit current-limiting resistor adjustment from the original 1.9V design
• Test current of 20mA (vs. 10mA original) necessitates power budget recalculation
• Height of 6.20mm maintains mechanical compatibility with original 6.40mm specification
• Wavelength peak of 592nm provides amber color within acceptable visual range

SSL-LX3044AD (Lumex Opto/Components Inc.):

• Active product status with established supply chain
• ROHS3 compliant with REACH unaffected status
• Diffused lens transparency matches the original 4303F3 optical characteristics
• Forward voltage of 2.1V requires circuit redesign for current-limiting resistor values
• Test current of 20mA requires power budget adjustment
• Height of 4.60mm is significantly lower than the original 6.40mm; verify mechanical clearance in PCB layout and enclosure design
• Wavelength peak of 605nm maintains amber color specification
• Lower millicandela rating (15mcd) compared to HLMP-NL06 (96.2mcd); consider brightness requirements for the application

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 4303F3 with either substitute without circuit modification?

A: No. Both substitutes have higher forward voltages (2.02V and 2.1V vs. 1.9V original). Current-limiting resistor values must be recalculated to maintain proper LED operating current. Test current specifications also differ (20mA vs. 10mA), affecting power dissipation calculations.

Q: What is the difference between the HLMP-NL06 and SSL-LX3044AD?

A: The primary differences are lens transparency and physical height. HLMP-NL06 features a clear lens with higher brightness (96.2mcd), while SSL-LX3044AD has a diffused lens matching the original 4303F3 optical behavior but with lower brightness (15mcd). SSL-LX3044AD is also significantly shorter (4.60mm vs. 6.20mm), which may affect PCB layout compatibility.

Q: Which substitute is better for my application?

A: Selection depends on application requirements. Choose SSL-LX3044AD if diffused light output and optical characteristics matching the original 4303F3 are critical. Choose HLMP-NL06 if higher brightness and clear lens transmission are acceptable and beneficial. Verify mechanical fit, particularly height constraints, before final selection.

Q: Are both substitutes RoHS compliant?

A: Yes. Both HLMP-NL06 and SSL-LX3044AD are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original 4303F3 environmental and regulatory specifications.

Q: What is the impact of different wavelength peaks on color perception?

A: The 4303F3 operates at 600nm peak wavelength. HLMP-NL06 (592nm) and SSL-LX3044AD (605nm) both fall within the amber color range. Wavelength differences of this magnitude produce visually similar amber colors; however, SSL-LX3044AD at 605nm may appear slightly more orange-tinted compared to the original 600nm specification.

Q: Can I use these substitutes in existing PCB designs without layout changes?

A: Mechanical compatibility must be verified. HLMP-NL06 height (6.20mm) is similar to the original (6.40mm), but SSL-LX3044AD (4.60mm) is significantly shorter. Verify clearance with enclosures, connectors, and adjacent components. All three parts use identical T-1 3mm radial package footprints, so PCB pad layouts are compatible.

Q: What inventory status should I consider for production planning?

A: The original 4303F3 is obsolete with 1146 pieces in stock. HLMP-NL06 has 32831 pieces available, and SSL-LX3044AD has 10765 pieces available. Both substitutes offer substantially higher inventory levels, supporting long-term production requirements.