TLHG44K1L2 Equivalent & Substitute Parts

Part Overview

The TLHG44K1L2 is a green diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for indication applications. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components to maintain design continuity and ensure ongoing component availability for production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLHG44K1L2
Manufacturer	Vishay Semiconductor Opto Division
Color	Green
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.1V
Current - Test	10mA
Millicandela Rating	12.55mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	569nm
Wavelength - Peak	565nm
Package / Case	Radial
Height (Max)	6.10mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TLHG44K1L2 is determined by the following critical parameters:

Primary Substitution Criteria:

Color: Green
Lens Transparency: Diffused
Lens Size: 3mm, T-1
Mounting Type: Through Hole
Wavelength - Dominant: 569nm
Wavelength - Peak: 565nm
Package / Case: Radial
RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

Voltage - Forward (Vf): 2.1V to 2.4V (within typical LED forward voltage tolerance)
Current - Test: 10mA to 20mA (standard test current range)
Millicandela Rating: 4mcd to 15mcd (luminous intensity variation acceptable for indication applications)
Viewing Angle: 35° to 60° (application-dependent)
Height (Max): 5.30mm to 6.35mm (mechanical fit tolerance)

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents (Vishay TLHG44 Series) Parts TLHG44K1M2, TLHG4400, TLHG4401, and TLHG4405 maintain identical optical and mechanical specifications with minor forward voltage and luminous intensity variations within acceptable ranges for direct substitution.

Category 2: Cross-Manufacturer Equivalents Parts from Everlight Electronics, Bivar Inc., and Broadcom Limited meet the core substitution criteria (color, lens type, size, wavelength, mounting) with acceptable variations in forward voltage, luminous intensity, and viewing angle.

Parameter Comparison

Parameter	TLHG44K1L2	TLHG44K1M2	TLHG4400	TLHG4401	TLHG4405	3GD-F	3GDL-F	HLMP-1503-D00FG	HLMP-1640
Manufacturer	Vishay	Vishay	Vishay	Vishay	Vishay	Bivar	Bivar	Broadcom	Broadcom
Color	Green	Green	Green	Green	Green	Green	Green	Green	Green
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3mm	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	2.1V	—	2.4V	2.4V	2.4V	2.1V	2.1V	2.1V	5V
Current - Test	10mA	—	10mA	10mA	10mA	20mA	2mA	10mA	10mA
Millicandela Rating	12.55mcd	—	13mcd	14mcd	15mcd	25mcd	4mcd	4.2mcd	1.6mcd
Viewing Angle	60°	—	60°	60°	60°	35°	35°	60°	60°
Wavelength - Dominant	569nm	—	569nm	569nm	569nm	—	—	569nm	569nm
Wavelength - Peak	565nm	—	565nm	565nm	565nm	568nm	568nm	565nm	565nm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	—	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	6.10mm	—	6.10mm	6.10mm	6.10mm	5.30mm	5.30mm	6.35mm	6.35mm
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: Vishay TLHG44 Series

TLHG4400, TLHG4401, and TLHG4405 are the preferred substitutes. All three parts are active products manufactured by the original equipment manufacturer, maintaining identical mechanical form factor, optical wavelength specifications, and RoHS3 compliance. Forward voltage increases from 2.1V to 2.4V and luminous intensity variations (13mcd to 15mcd) are within acceptable tolerance for indication applications. These parts ensure design continuity with minimal circuit redesign.

Secondary Recommendation: Broadcom HLMP-1503-D00FG

This part provides an active alternative from an established LED manufacturer with identical optical and mechanical specifications to the original TLHG44K1L2. Forward voltage (2.1V) and test current (10mA) match the original part exactly. RoHS3 compliance and REACH unaffected status are confirmed. Luminous intensity (4.2mcd) is lower than the original but acceptable for indication applications.

Alternative Recommendation: Bivar 3GD-F

The 3GD-F offers an active cross-manufacturer option with matching forward voltage (2.1V) and similar wavelength characteristics (568nm peak). Luminous intensity (25mcd) exceeds the original specification, suitable for applications requiring higher brightness. Viewing angle (35°) is narrower than the original (60°), requiring circuit layout evaluation. RoHS3 compliance is confirmed.

Not Recommended: HLMP-1640

Forward voltage of 5V represents a significant departure from the original 2.1V specification, requiring substantial circuit redesign. This part is suitable only for applications with different voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can TLHG4400, TLHG4401, and TLHG4405 be used interchangeably with TLHG44K1L2?

A: Yes. These Vishay parts maintain identical mechanical form factor, lens type, size, wavelength specifications, and RoHS3 compliance. Forward voltage increases from 2.1V to 2.4V and luminous intensity varies between 13mcd and 15mcd, both within acceptable tolerance for indication applications. No circuit redesign is required.

Q: What is the difference between TLHG4400, TLHG4401, and TLHG4405?

A: All three parts share identical specifications except for luminous intensity: TLHG4400 (13mcd), TLHG4401 (14mcd), and TLHG4405 (15mcd). Selection depends on brightness requirements for the specific indication application.

Q: Can cross-manufacturer parts like Bivar 3GD-F or Broadcom HLMP-1503-D00FG replace TLHG44K1L2?

A: Yes, with application-specific evaluation. Both parts match the core substitution criteria (green color, diffused lens, 3mm T-1 size, through-hole mounting, 569nm wavelength, RoHS3 compliance). Bivar 3GD-F has a narrower viewing angle (35° vs. 60°), and Broadcom HLMP-1503-D00FG has lower luminous intensity (4.2mcd vs. 12.55mcd). Circuit layout and brightness requirements must be evaluated.

Q: Why is HLMP-1640 not recommended as a substitute?

A: HLMP-1640 has a forward voltage of 5V, compared to 2.1V for TLHG44K1L2. This significant difference requires substantial circuit redesign and is not suitable for direct substitution in existing designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts are confirmed ROHS3 Compliant, maintaining regulatory compliance with the original TLHG44K1L2.

Q: What packaging options are available for substitute parts?

A: Recommended Vishay substitutes (TLHG4400, TLHG4401, TLHG4405) are available in Bulk packaging. Broadcom HLMP-1503-D00FG is available in Bulk. Bivar parts (3GD-F, 3GDL-F) are available in Bulk. Everlight parts are available in Bulk or Tape & Reel formats depending on the specific model.

Q: Can 3GDL-F be used instead of 3GD-F?

A: 3GDL-F is a lower-brightness variant (4mcd vs. 25mcd) designed for lower-current applications (2mA vs. 20mA). Selection depends on brightness and current requirements. Both parts share identical forward voltage (2.1V), lens type, size, and wavelength characteristics.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message