4300F7LC Yellow LED Diffused T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The 4300F7LC is a yellow diffused LED indicator manufactured by Visual Communications Company (VCC) in T-1 (3mm) through-hole package. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 4300F7LC operates at 1.9V forward voltage with 2mA test current, delivering 1.8mcd luminous intensity with a 50° viewing angle. Substitute parts must maintain compatibility with the original electrical specifications and through-hole mounting requirements while accommodating modern active alternatives.

Key Parameters

Parameter	4300F7LC Specification
Manufacturer	Visual Communications Company (VCC)
Color	Yellow
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	1.9V
Current - Test	2mA
Millicandela Rating	1.8mcd
Viewing Angle	50°
Wavelength - Peak	583nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.35mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the 4300F7LC is based on the following critical parameters:

Primary Compatibility Criteria:

Color: Yellow
Lens Transparency: Diffused
Lens Style: Round with Domed Top
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Package / Case: Radial
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Electrical Parameters (with tolerance ranges):

Voltage - Forward (Vf): 1.9V nominal (acceptable range: 1.8V to 2.1V)
Current - Test: 2mA nominal (acceptable range: 2mA to 20mA)
Millicandela Rating: 1.8mcd nominal (acceptable range: 2mcd to 200mcd)
Viewing Angle: 50° nominal (acceptable range: 30° to 60°)
Wavelength - Peak: 583nm nominal (acceptable range: 583nm to 591nm)

Substitute parts are grouped into two categories based on electrical compatibility:

Category A - Direct Electrical Equivalents (1.8V to 2.1V forward voltage, 2mA test current):

HLMP-1719-A0002 (Broadcom Limited)
3YDL-F (Bivar Inc.)
151031YS05900 (Würth Elektronik)

Category B - Higher Current Alternatives (2V forward voltage, 20mA test current):

1254-10UYD/S530-A3 (Everlight Electronics Co Ltd)
264-7UYD/S530-A3 (Everlight Electronics Co Ltd)
3YD-F (Bivar Inc.)

Category C - Higher Voltage Alternatives (5V to 12V forward voltage):

HLMP-1620 (Broadcom Limited)
HLMP-1620-C00A1 (Broadcom Limited)
HLMP-1620-C00A2 (Broadcom Limited)
HLMP-1621 (Broadcom Limited)

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status
4300F7LC	VCC	1.9V	2mA	1.8mcd	50°	583nm	6.35mm	Obsolete
HLMP-1719-A0002	Broadcom Limited	1.8V	2mA	2.1mcd	50°	-	6.35mm	Active
3YDL-F	Bivar Inc.	2V	2mA	2mcd	35°	590nm	5.30mm	Active
151031YS05900	Würth Elektronik	2.1V	20mA	30mcd	60°	585nm	5.55mm	Active
1254-10UYD/S530-A3	Everlight Electronics Co Ltd	2V	20mA	200mcd	30°	591nm	5.20mm	Active
264-7UYD/S530-A3	Everlight Electronics Co Ltd	2V	20mA	125mcd	60°	591nm	6.20mm	Active
3YD-F	Bivar Inc.	2V	20mA	20mcd	35°	590nm	5.30mm	Active
HLMP-1620	Broadcom Limited	5V	10mA	2.2mcd	60°	583nm	6.35mm	Active
HLMP-1620-C00A1	Broadcom Limited	5V	10mA	2.2mcd	60°	583nm	-	Active
HLMP-1620-C00A2	Broadcom Limited	5V	10mA	2.2mcd	60°	583nm	-	Active
HLMP-1621	Broadcom Limited	12V	13mA	2.2mcd	60°	583nm	6.35mm	Active

Engineering Selection Recommendations

For Direct Replacement (Minimal Circuit Modification):

HLMP-1719-A0002 (Broadcom Limited) is the closest electrical equivalent. It maintains 1.8V forward voltage and 2mA test current specifications, matching the 4300F7LC operating point. This part is active, ROHS3 compliant, and available in volume. The identical 6.35mm height and T-1 package ensure mechanical compatibility without PCB redesign.

For Low-Current Applications (2mA Test Current):

3YDL-F (Bivar Inc.) operates at 2V forward voltage with 2mA test current, requiring minimal circuit adjustment. This part is active and ROHS3 compliant. The reduced height (5.30mm) may require verification against mechanical constraints.

For Higher Brightness Applications (20mA Test Current):

When circuit design permits increased current draw, 151031YS05900 (Würth Elektronik) provides 30mcd brightness at 2.1V forward voltage. This part is active, ROHS3 compliant, and part of the WL-TMRC series. The 60° viewing angle and 5.55mm height are suitable for general indication applications.

264-7UYD/S530-A3 (Everlight Electronics Co Ltd) offers 125mcd brightness at 2V forward voltage with 20mA test current, providing higher visibility for applications requiring enhanced brightness. This part is active and ROHS3 compliant.

For 5V System Integration:

HLMP-1620 (Broadcom Limited) operates at 5V forward voltage with 10mA test current. This part is active, ROHS3 compliant, and maintains identical 6.35mm height and T-1 package. Circuit redesign is required to accommodate the higher voltage specification.

For 12V System Integration:

HLMP-1621 (Broadcom Limited) operates at 12V forward voltage with 13mA test current. This part is active, ROHS3 compliant, and maintains identical 6.35mm height and T-1 package. Circuit redesign is required to accommodate the higher voltage specification.

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1719-A0002 be used as a direct drop-in replacement for 4300F7LC?

A: Yes. HLMP-1719-A0002 maintains the same 1.8V to 1.9V forward voltage range and 2mA test current. Both parts use identical T-1 (3mm) through-hole radial packages with 6.35mm maximum height. No circuit modification is required.

Q: What is the difference between Category A and Category B substitutes?

A: Category A substitutes (HLMP-1719-A0002, 3YDL-F, 151031YS05900) operate at 2mA test current, matching the original 4300F7LC specification. Category B substitutes (1254-10UYD/S530-A3, 264-7UYD/S530-A3, 3YD-F) operate at 20mA test current, requiring circuit redesign to accommodate higher current draw and potentially higher brightness output.

Q: Can I use a 5V LED (HLMP-1620) in a circuit designed for 1.9V?

A: No. Direct substitution is not possible without circuit modification. The HLMP-1620 requires 5V forward voltage; applying 1.9V will result in insufficient LED illumination or no operation. A current-limiting resistor must be recalculated for the 5V specification.

Q: What does "Diffused" lens transparency mean?

A: Diffused lenses scatter light over a wider area, reducing peak brightness but improving visibility from off-axis angles. All listed substitutes maintain diffused lens transparency, ensuring consistent light distribution characteristics.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original 4300F7LC compliance status.

Q: What is the significance of wavelength specifications (583nm, 585nm, 590nm, 591nm)?

A: These wavelengths define the perceived yellow color. The range 583nm to 591nm represents standard yellow LED specifications. All listed substitutes fall within this range, ensuring consistent color appearance across different manufacturers.

Q: Can I substitute a higher brightness LED (200mcd) for the original 1.8mcd part?

A: Yes, if circuit design permits. Higher brightness LEDs require higher test current (typically 20mA vs. 2mA). Verify that your power supply and current-limiting resistor can accommodate the increased current draw. Mechanical fit and viewing angle must also be confirmed.

Q: What is the difference between radial and right-angle packages?

A: Radial packages have leads extending from the bottom of the LED body, suitable for vertical PCB mounting. Right-angle packages (HLMP-1620-C00A1, HLMP-1620-C00A2) have leads bent 90°, suitable for horizontal PCB mounting. The 4300F7LC uses radial package; right-angle variants require different PCB footprints.

Q: Why is the 4300F7LC classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by VCC. Active substitutes from Broadcom Limited, Everlight Electronics Co Ltd, Würth Elektronik, and Bivar Inc. provide equivalent or superior functionality with ongoing manufacturing support.

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