TLHP4400 LED Green Diffused T-1 Through Hole - Equivalent & Substitute Parts

Part Overview

The TLHP4400 is a green diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for discrete LED indication applications. This part operates at 2.4V forward voltage with a 2mcd brightness rating and 560nm dominant wavelength. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain compatibility with through-hole mounting, similar optical characteristics, and equivalent electrical performance within acceptable operating parameters.

Key Parameters

Parameter	TLHP4400 Value
Color	Green
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.4V
Current - Test	10mA
Millicandela Rating	2mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	560nm
Wavelength - Peak	555nm
Package / Case	Radial
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the TLHP4400 is based on the following critical parameters:

Primary Compatibility Criteria:

Color: Green (allows yellow-green variants with 560-575nm wavelength range)
Lens Transparency: Diffused
Lens Size: 3mm, T-1 form factor
Mounting Type: Through Hole, Radial package
Voltage - Forward (Vf): 1.9V to 2.4V range
Viewing Angle: 35° to 60° acceptable range
RoHS3 Compliance and MSL 1 rating required

Substitute Categories:

Category A - Direct Green Diffused T-1 Equivalents (Highest Compatibility) Parts matching green color, diffused lens, T-1 form factor, and similar electrical characteristics within acceptable voltage and current ranges.

Category B - Yellow-Green Diffused Alternatives (Optical Variant) Parts with yellow-green color (573-575nm wavelength) and diffused lens, maintaining T-1 form factor and through-hole mounting. These provide similar visual indication with extended wavelength range.

Category C - Green Diffused 3mm Variants (Form Factor Variant) Parts with green color and diffused lens in 3mm diameter form factor with different electrical characteristics or viewing angles, suitable for applications with modified brightness or angle requirements.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	Millicandela	Viewing Angle	Wavelength - Peak	Height (Max)	Product Status
TLHP4400	Vishay	Green	Diffused	3mm, T-1	2.4V	10mA	2mcd	60°	555nm	6.10mm	Obsolete
3GDL-F	Bivar Inc.	Green	Diffused	3mm, T-1	2.1V	2mA	4mcd	35°	568nm	5.30mm	Active
3GD-F	Bivar Inc.	Green	Diffused	3mm, T-1	2.1V	20mA	25mcd	35°	568nm	5.30mm	Active
HLMP-1503-D0000	Broadcom Limited	Green	Diffused	3mm, T-1	2.1V	10mA	4.2mcd	60°	565nm	6.35mm	Active
HLMP-1503-D0002	Broadcom Limited	Green	Diffused	3mm, T-1	2.1V	10mA	4.2mcd	60°	565nm	6.35mm	Active
HLMP-1503-D00FG	Broadcom Limited	Green	Diffused	3mm, T-1	2.1V	10mA	4.2mcd	60°	565nm	6.35mm	Active
264-7SYGD/S530-E2	Everlight Electronics	Yellow-Green	Diffused	2.90mm Dia	2V	20mA	50mcd	60°	575nm	6.20mm	Active
414SYGD/S530-E2	Everlight Electronics	Yellow-Green	Diffused	3.00mm Dia	2V	20mA	12.5mcd	140°	575nm	7.00mm	Active
5219323F	Dialight	Green	Diffused	3.00mm Dia	7.5V	10mA	19mcd	60°	565nm	5.86mm	Active
5219326F	Dialight	Green	Diffused	3.00mm Dia	1.9V	2mA	1.6mcd	60°	565nm	5.86mm	Active
5219430F	Dialight	Green	Clear	2.90mm Dia	2.1V	10mA	50mcd	45°	565nm	5.89mm	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Category A - Direct Equivalents):

The HLMP-1503 series from Broadcom Limited (HLMP-1503-D0000, HLMP-1503-D0002, HLMP-1503-D00FG) provides the closest electrical and optical match to the TLHP4400. These parts maintain green color, diffused lens, T-1 form factor, 60° viewing angle, and operate at 2.1V forward voltage with 10mA test current. All variants are ROHS3 compliant with MSL 1 rating. The primary difference is slightly higher brightness (4.2mcd vs. 2mcd), which is acceptable for most indication applications. HLMP-1503-D0002 offers the highest inventory availability (35,458 pcs) in Cut Tape packaging.

The Bivar 3GDL-F provides an alternative with matching T-1 form factor and green diffused lens at 2.1V forward voltage. This part operates at 2mA test current with 4mcd brightness and 35° viewing angle, making it suitable for applications requiring lower current draw or narrower viewing angle.

Secondary Substitutes (Category B - Optical Variants):

Everlight Electronics 264-7SYGD/S530-E2 offers yellow-green color (575nm peak wavelength) with diffused lens and similar electrical characteristics (2V forward voltage, 20mA test current). This part is suitable when yellow-green indication is acceptable and higher brightness (50mcd) is beneficial. Viewing angle remains at 60°.

Alternative Substitutes (Category C - Form Factor Variants):

Dialight 5219326F matches the low-brightness requirement (1.6mcd) with green diffused lens and operates at 1.9V forward voltage with 2mA test current, suitable for ultra-low-power applications. Dialight 5219323F provides higher brightness (19mcd) at 7.5V forward voltage, requiring circuit redesign for voltage compatibility.

Compliance Verification:

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

Frequently Asked Questions (FAQ)

Q: Can I directly replace TLHP4400 with HLMP-1503-D0002 without circuit modification?

A: The HLMP-1503-D0002 operates at 2.1V forward voltage compared to TLHP4400's 2.4V. For direct replacement in existing circuits, verify that your current-limiting resistor accommodates the 0.3V difference. The brightness increase from 2mcd to 4.2mcd is typically acceptable for indication applications. If your circuit uses a fixed current source, no modification is required.

Q: What is the difference between HLMP-1503-D0000, HLMP-1503-D0002, and HLMP-1503-D00FG?

A: These three variants are electrically and optically identical. The differences are in packaging: D0000 is supplied in Bulk, D0002 in Cut Tape (CT), and D00FG in Bulk. Select based on your procurement and assembly requirements. D0002 offers significantly higher inventory availability.

Q: Can I use the Everlight 264-7SYGD/S530-E2 (yellow-green) as a direct replacement?

A: The 264-7SYGD/S530-E2 is a yellow-green LED (575nm) rather than pure green (560nm). It is suitable only if your application accepts yellow-green indication. The part operates at 2V forward voltage and 20mA test current, requiring circuit verification. Brightness is significantly higher (50mcd vs. 2mcd), which may require resistor adjustment.

Q: Why do some substitutes have different forward voltages?

A: Forward voltage varies based on LED chip composition and design. The TLHP4400 operates at 2.4V, while most active substitutes operate at 2.1V or 2V. This difference reflects manufacturing improvements and different semiconductor materials. Circuits using current-limiting resistors accommodate this variation automatically. Fixed-voltage circuits may require resistor recalculation.

Q: Is the Dialight 5219430F (clear lens) compatible with TLHP4400?

A: The 5219430F has a clear lens rather than diffused, producing a different optical appearance with higher brightness concentration. It is not recommended as a direct replacement if diffused appearance is required. Use only if your application can accept clear lens characteristics.

Q: What is the significance of the 35° vs. 60° viewing angle difference?

A: Viewing angle determines the cone of light distribution. TLHP4400 has 60° viewing angle (wider distribution), while Bivar 3GD-F and 3GDL-F have 35° (narrower, more concentrated). Select based on your application's viewing requirements. Narrower angles concentrate brightness in a specific direction; wider angles distribute light more broadly.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all recommended substitutes listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the TLHP4400 compliance profile. This ensures compatibility with modern manufacturing standards and environmental regulations.

Q: Which substitute offers the best inventory availability?

A: HLMP-1503-D0002 from Broadcom Limited offers the highest inventory (35,458 pcs) in Cut Tape packaging, providing reliable supply for production requirements.

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