TLHG4401 Equivalent & Substitute Parts

Part Overview

The TLHG4401 is a green diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division. This component operates at 2.4V forward voltage with a 14mcd brightness rating and 569nm dominant wavelength, designed for standard LED indication applications. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are necessary when the primary component becomes unavailable, when alternative packaging formats are required, or when design specifications allow for variations in brightness, voltage characteristics, or lens properties while maintaining functional compatibility.

Key Parameters

Parameter	TLHG4401 Value
Color	Green
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.4V
Current - Test	10mA
Millicandela Rating	14mcd
Wavelength - Dominant	569nm
Wavelength - Peak	565nm
Viewing Angle	60°
Mounting Type	Through Hole
Lens Style	Round with Domed Top
Height (Max)	6.10mm
Package / Case	Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLHG4401 is determined by the following critical parameters:

Primary Compatibility Criteria:

Color: Green (required match)
Mounting Type: Through Hole (required match)
Lens Size: 3mm, T-1 or equivalent 3.00mm diameter (required match)
Package / Case: Radial (required match)
Wavelength - Peak: 565nm region (acceptable range)

Secondary Variation Parameters (allowable differences):

Voltage - Forward (Vf): Range 1.9V to 7.5V (circuit design dependent)
Millicandela Rating: 1.6mcd to 50mcd (application brightness dependent)
Lens Transparency: Diffused or Clear (optical property variation)
Viewing Angle: 45° to 140° (application field-of-view dependent)
Current - Test: 2mA to 20mA (design dependent)
Height (Max): 5.86mm to 7.00mm (PCB clearance dependent)

Substitute parts are grouped by their deviation from the TLHG4401 baseline. Parts with minimal parameter variance are listed first, followed by parts with greater electrical or optical differences.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	Millicandela	Wavelength - Peak	Viewing Angle	Height (Max)	Packaging
TLHG4401	Vishay	Green	Diffused	3mm, T-1	2.4V	10mA	14mcd	565nm	60°	6.10mm	Bulk
TLHG4405	Vishay	Green	Diffused	3mm, T-1	2.4V	10mA	15mcd	565nm	60°	6.10mm	Bulk
HLMP-1503-D0000	Broadcom	Green	Diffused	3mm, T-1	2.1V	10mA	4.2mcd	565nm	60°	6.35mm	Bulk
HLMP-1503-D0002	Broadcom	Green	Diffused	3mm, T-1	2.1V	10mA	4.2mcd	565nm	60°	6.35mm	Cut Tape (CT)
HLMP-1640	Broadcom	Green	Diffused	3mm, T-1	5V	10mA	1.6mcd	565nm	60°	6.35mm	Bulk
HLMP-1640-B00A1	Broadcom	Green	Diffused, Tinted	3mm, T-1	5V	10mA	1.6mcd	565nm	120°	N/A	Bulk
HLMP-1640-B00A2	Broadcom	Green	Diffused, Tinted	3mm, T-1	5V	10mA	1.6mcd	565nm	60°	N/A	Bulk
5219323F	Dialight	Green	Diffused	3.00mm Dia	7.5V	10mA	19mcd	565nm	60°	5.86mm	Bulk
5219326F	Dialight	Green	Diffused	3.00mm Dia	1.9V	2mA	1.6mcd	565nm	60°	5.86mm	Bulk
5219430F	Dialight	Green	Clear	2.90mm Dia	2.1V	10mA	50mcd	565nm	45°	5.89mm	Bulk
414SYGD/S530-E2	Everlight	Yellow-Green	Diffused	3.00mm Dia	2V	20mA	12.5mcd	575nm	140°	7.00mm	Tape & Reel (TR)

Engineering Selection Recommendations

Direct Substitutes (Minimal Parameter Variance):

TLHG4405 from Vishay is the closest equivalent, differing only in millicandela rating (15mcd vs 14mcd). Both parts share identical voltage, current, wavelength, viewing angle, and physical dimensions. This substitution requires no circuit redesign.

HLMP-1503-D0000 and HLMP-1503-D0002 from Broadcom are functionally compatible with lower brightness (4.2mcd) and slightly reduced forward voltage (2.1V). These parts are suitable for applications where lower brightness is acceptable. The D0002 variant offers Cut Tape packaging for automated assembly.

Conditional Substitutes (Moderate Parameter Variance):

HLMP-1640, HLMP-1640-B00A1, and HLMP-1640-B00A2 operate at 5V forward voltage with significantly reduced brightness (1.6mcd). These parts are suitable only for circuits designed for 5V operation and where lower brightness is acceptable. HLMP-1640-B00A1 and B00A2 feature right-angle mounting, incompatible with standard radial through-hole layouts.

5219323F from Dialight operates at 7.5V with higher brightness (19mcd). This part requires circuit redesign for higher voltage operation and is suitable for applications requiring increased brightness.

5219326F from Dialight operates at 1.9V with minimal brightness (1.6mcd) and reduced current (2mA). This part is suitable for low-power applications only.

5219430F from Dialight features clear lens transparency with significantly higher brightness (50mcd) and narrower viewing angle (45°). This part is suitable for applications requiring high brightness with focused beam characteristics.

Limited Compatibility:

414SYGD/S530-E2 from Everlight is a yellow-green LED (573nm dominant wavelength) with different color characteristics. This part is not recommended as a direct substitute due to color mismatch, though it may be acceptable in applications where yellow-green indication is functionally equivalent to green.

All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating consistent with the TLHG4401.

Frequently Asked Questions (FAQ)

Q: Can TLHG4405 replace TLHG4401 without circuit modification?

A: Yes. TLHG4405 differs only in millicandela rating (15mcd vs 14mcd), a 7% increase in brightness. All electrical parameters, voltage, current, wavelength, and physical dimensions are identical. No circuit redesign is required.

Q: What is the primary difference between Broadcom HLMP-1503 and HLMP-1640 series?

A: Forward voltage and brightness differ significantly. HLMP-1503 operates at 2.1V with 4.2mcd brightness, while HLMP-1640 operates at 5V with 1.6mcd brightness. Selection depends on circuit voltage availability and brightness requirements.

Q: Can I use 5219430F (clear lens) instead of TLHG4401 (diffused lens)?

A: Lens transparency affects light distribution. Clear lenses produce focused beams with narrower viewing angles (45° vs 60°), while diffused lenses scatter light over wider areas. 5219430F is suitable only if your application requires focused, high-brightness indication with a 45° viewing angle.

Q: Why is 414SYGD/S530-E2 listed as a substitute if it is yellow-green, not green?

A: This part is included for reference in applications where yellow-green indication may be functionally equivalent to green. Color perception and application requirements determine actual compatibility. Verify color acceptance in your specific application before substitution.

Q: What packaging formats are available for TLHG4401 substitutes?

A: Bulk packaging is standard for most substitutes. HLMP-1503-D0002 is available in Cut Tape format for automated assembly. 414SYGD/S530-E2 is supplied in Tape & Reel format. Packaging selection depends on assembly process requirements.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1) consistent with the TLHG4401 baseline specification.

Q: What is the maximum height variance among substitutes?

A: Height ranges from 5.86mm (Dialight 5219323F) to 7.00mm (Everlight 414SYGD/S530-E2), compared to 6.10mm for TLHG4401. Verify PCB clearance requirements before selecting parts with height variance exceeding ±0.5mm.

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