4300H7LC Yellow LED Diffused T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The 4300H7LC is a yellow diffused LED indicator manufactured by Visual Communications Company (VCC) in a T-1 3/4 (5mm) through-hole package. This discrete LED operates at 1.9V forward voltage with a 2mA test current and delivers 2.1 millicandela of luminous intensity. The component features a round domed lens with 50° viewing angle and a peak wavelength of 583nm.

The 4300H7LC is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and repair requirements for legacy systems utilizing this LED indicator.

Key Parameters

Parameter	Value
Color	Yellow
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	1.9V
Current - Test	2mA
Millicandela Rating	2.1mcd
Viewing Angle	50°
Wavelength - Peak	583nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	8.89mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 4300H7LC is determined by the following critical parameters:

Primary Substitution Criteria:

Color: Yellow
Lens Transparency: Diffused
Mounting Type: Through Hole
Package / Case: Radial
Lens Size: 5mm, T-1 3/4 form factor

Secondary Compatibility Parameters:

Voltage - Forward (Vf): 1.9V nominal (acceptable range: 1.8V to 2.1V for direct substitution)
Current - Test: 2mA nominal (acceptable range: 2mA to 20mA depending on circuit design)
Millicandela Rating: 2.1mcd nominal (acceptable range: 2.1mcd to 12.6mcd for indication applications)
Viewing Angle: 50° nominal (acceptable range: 25° to 60° depending on application requirements)
Peak Wavelength: 583nm nominal (acceptable range: 583nm to 591nm for yellow indication)

Substitute parts must maintain compatibility across the primary criteria. Secondary parameters may vary within specified ranges based on circuit design requirements and application constraints. Parts with different forward voltages (5V, 12V) are listed for reference but require circuit redesign and are not direct substitutes.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Peak Wavelength	Height (Max)	Product Status
4300H7LC	VCC	Yellow	Diffused	5mm, T-1 3/4	1.9V	2mA	2.1mcd	50°	583nm	8.89mm	Obsolete
HLMP-4719	Broadcom Limited	Yellow	Diffused	5mm, T-1 3/4	1.8V	2mA	2.1mcd	50°	585nm	9.19mm	Active
HLMP-4719-A0002	Broadcom Limited	Yellow	Diffused	5mm, T-1 3/4	1.8V	2mA	2.1mcd	50°	585nm	9.19mm	Active
HLMP-3401	Broadcom Limited	Yellow	Diffused	5mm, T-1 3/4	2V	10mA	5.7mcd	60°	583nm	9.19mm	Active
HLMP-3401-E0002	Broadcom Limited	Yellow	Diffused	5mm, T-1 3/4	2V	10mA	5.7mcd	60°	583nm	9.19mm	Active
5219673F	Dialight	Yellow	Diffused	4.75mm Dia	2.1V	20mA	12.6mcd	60°	585nm	8.21mm	Active
1383UYD/S530-A3	Everlight Electronics Co Ltd	Yellow	Diffused	5.00mm Dia	2V	20mA	800mcd	25°	591nm	8.90mm	Active

Engineering Selection Recommendations

Primary Substitute (Direct Replacement):

HLMP-4719 and HLMP-4719-A0002 (Broadcom Limited) are the closest functional equivalents to the 4300H7LC. Both parts maintain identical electrical characteristics (1.8V forward voltage, 2mA test current, 2.1mcd luminous intensity, 50° viewing angle) and physical form factor (5mm T-1 3/4 through-hole radial package). The forward voltage differential of 0.1V (1.8V versus 1.9V) is within acceptable tolerance for most indication circuit designs. Peak wavelength variation (585nm versus 583nm) remains within the yellow spectrum range. Both HLMP-4719 variants are active products with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory compliance.

Secondary Substitutes (Parameter Variance):

HLMP-3401 and HLMP-3401-E0002 (Broadcom Limited) provide functional substitution with acceptable parameter variance. Forward voltage increases to 2V and test current increases to 10mA, requiring circuit verification to confirm compatibility with existing current-limiting resistor networks. Luminous intensity increases to 5.7mcd and viewing angle expands to 60°, which may alter visual indication characteristics in the application. These parts maintain identical physical form factor and are active products with full compliance certifications.

HLMP-3650 and HLMP-3650-C00B2 (Broadcom Limited) operate at 5V forward voltage and are not direct substitutes for the 1.9V 4300H7LC without circuit redesign. These parts are listed for reference in applications requiring higher voltage operation.

HLMP-3651 (Broadcom Limited) operates at 12V forward voltage and requires complete circuit redesign. This part is not suitable for direct substitution.

5219673F (Dialight Series 521) provides functional substitution with notable parameter variance. Lens size reduces to 4.75mm diameter, forward voltage increases to 2.1V, test current increases to 20mA, and luminous intensity increases significantly to 12.6mcd. Viewing angle expands to 60°. Physical height reduces to 8.21mm. Circuit verification is required before implementation.

1383UYD/S530-A3 (Everlight Electronics) presents significant parameter variance unsuitable for direct substitution. Luminous intensity increases dramatically to 800mcd, viewing angle narrows to 25°, and test current increases to 20mA. This part is suitable only for applications requiring substantially different optical and electrical characteristics.

Compliance and Availability:

All recommended substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory alignment with the original 4300H7LC. Broadcom Limited parts (HLMP series) demonstrate superior inventory availability and active product status, supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can HLMP-4719 directly replace 4300H7LC without circuit modification?

A: HLMP-4719 is the closest functional equivalent with matching electrical characteristics (2mA test current, 2.1mcd luminous intensity, 50° viewing angle) and identical physical form factor (5mm T-1 3/4 through-hole). Forward voltage differs by 0.1V (1.8V versus 1.9V), which is within acceptable tolerance for most indication circuits. No circuit modification is required for standard indication applications. Verification of circuit performance is recommended for applications with tight voltage tolerances.

Q: What is the difference between HLMP-4719 and HLMP-4719-A0002?

A: Both parts are electrically and optically identical. HLMP-4719 is supplied in bulk packaging, while HLMP-4719-A0002 is supplied in cut tape (CT) packaging. Selection depends on assembly process requirements. HLMP-4719-A0002 offers higher inventory availability (4,298 pieces) compared to HLMP-4719 (23,019 pieces), though both are active products.

Q: Why is HLMP-3401 not recommended as a direct substitute?

A: HLMP-3401 operates at 2V forward voltage and 10mA test current, compared to 4300H7LC specifications of 1.9V and 2mA. The five-fold increase in test current requires circuit redesign to accommodate different current-limiting resistor values. Luminous intensity increases to 5.7mcd and viewing angle expands to 60°, altering visual indication characteristics. HLMP-3401 is suitable only when circuit redesign is acceptable and increased brightness is desired.

Q: Can 5219673F (Dialight) be used as a substitute?

A: 5219673F provides functional substitution with acceptable parameter variance for applications permitting circuit modification. Forward voltage increases to 2.1V, test current increases to 20mA, and luminous intensity increases to 12.6mcd. Lens size reduces slightly to 4.75mm diameter. Physical height reduces to 8.21mm. Implementation requires verification that the application circuit accommodates the increased current draw and brightness. This part is suitable for new designs or applications where parameter variance is acceptable.

Q: What is the significance of peak wavelength differences between substitute parts?

A: Peak wavelength variations (583nm to 591nm) remain within the yellow spectrum range and are imperceptible to human vision in indication applications. The 4300H7LC operates at 583nm peak wavelength. HLMP-4719 operates at 585nm, and 1383UYD/S530-A3 operates at 591nm. All wavelengths produce yellow indication and are functionally equivalent for visual indication purposes.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed in this document maintain ROHS3 compliance, ensuring regulatory alignment with the original 4300H7LC. Compliance certifications are current for all active products. Verify compliance status with the component supplier for specific procurement batches.

Q: What packaging options are available for substitute parts?

A: HLMP-4719 is available in bulk packaging. HLMP-4719-A0002 is available in cut tape (CT) packaging for automated assembly. HLMP-3401 is available in bulk packaging, while HLMP-3401-E0002 is available in cut tape (CT) packaging. 5219673F is available in bulk packaging. Selection depends on assembly process requirements and production volume.

Q: Can HLMP-3650 or HLMP-3651 substitute for 4300H7LC?

A: HLMP-3650 operates at 5V forward voltage and HLMP-3651 operates at 12V forward voltage. Neither part is suitable for direct substitution in circuits designed for 1.9V operation. These parts require complete circuit redesign including power supply modifications and current-limiting resistor recalculation. Use these parts only in applications specifically requiring 5V or 12V operation.

Q: What is the moisture sensitivity level (MSL) rating for substitute parts?

A: All recommended substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating, identical to the original 4300H7LC. This rating indicates no moisture sensitivity precautions are required during storage, handling, or assembly processes.

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