TLHG5401 Equivalent & Substitute Parts

Part Overview

The TLHG5401 is a green diffused LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This T-1 3/4 radial package LED operates at 2.4V forward voltage with a 12mcd brightness rating and 569nm dominant wavelength. The part is currently active in production and ROHS3 compliant.

Substitute parts are necessary when the TLHG5401 reaches end-of-life status, experiences supply constraints, or when design requirements allow for alternative electrical or mechanical specifications within acceptable operating parameters.

Key Parameters

Parameter	TLHG5401 Value
Color	Green
Lens Transparency	Diffused
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2.4V
Current - Test	10mA
Millicandela Rating	12mcd
Viewing Angle	60°
Mounting Type	Through Hole
Wavelength - Dominant	569nm
Wavelength - Peak	565nm
Package / Case	Radial
Height (Max)	12.80mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TLHG5401 is determined by the following criteria:

Primary Compatibility Parameters:

Color: Green
Lens Transparency: Diffused
Mounting Type: Through Hole
Package Type: Radial (5mm form factor)

Secondary Electrical Parameters:

Forward Voltage (Vf): 1.8V to 2.4V range acceptable
Test Current: 2mA to 20mA range acceptable
Millicandela Rating: 2.3mcd to 180mcd range acceptable
Viewing Angle: 36° to 60° range acceptable
Wavelength - Dominant: 569nm to 572nm range acceptable

Substitute parts must maintain through-hole radial mounting configuration and diffused green lens characteristics. Variations in forward voltage, brightness, and viewing angle are permissible within the specified ranges, as these parameters do not affect mechanical fit or basic functional compatibility in indicator applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	mcd Rating	Viewing Angle	Wavelength - Dominant	Wavelength - Peak	Mounting Type	Height (Max)	Product Status	RoHS Status
TLHG5401	Vishay Semiconductor Opto Division	Green	Diffused	5mm, T-1 3/4	2.4V	10mA	12mcd	60°	569nm	565nm	Through Hole	12.80mm	Active	ROHS3 Compliant
151051VS04000	Würth Elektronik	Green	Diffused	4.90mm Dia	2.1V	20mA	140mcd	40°	572nm	573nm	Through Hole	8.95mm	Active	ROHS3 Compliant
4300H5LC	Visual Communications Company - VCC	Green	Diffused	5mm, T-1 3/4	1.8V	2mA	2.3mcd	50°	—	565nm	Through Hole	8.89mm	Not For New Designs	ROHS3 Compliant
5219674F	Dialight	Green	Diffused	4.75mm Dia	2.1V	20mA	40mcd	60°	569nm	565nm	Through Hole	8.21mm	Active	ROHS3 Compliant
HLMP-3507-D00B2	Broadcom Limited	Green	Diffused	—	2.1V	10mA	4.2mcd	—	—	565nm	Through Hole, Right Angle	—	Active	ROHS3 Compliant
HLMP-3680-B00B2	Broadcom Limited	Green	Diffused, Tinted	—	5V	10mA	1.6mcd	60°	—	565nm	Through Hole, Right Angle	—	Active	ROHS3 Compliant
LTL-307G	Lite-On Inc.	Green	Diffused	5.00mm Dia	2.1V	20mA	19mcd	50°	569nm	565nm	Through Hole	8.60mm	Active	ROHS3 Compliant
LTL-4233	Lite-On Inc.	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	19mcd	36°	569nm	565nm	Through Hole	8.60mm	Active	ROHS3 Compliant
LTL2R3KG	Lite-On Inc.	Green	Diffused	5mm, T-1 3/4	2.1V	20mA	180mcd	40°	572nm	575nm	Through Hole	8.70mm	Active	ROHS3 Compliant
SLR-56MG3F	Rohm Semiconductor	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	16mcd	40°	572nm	—	Through Hole	8.90mm	Not For New Designs	ROHS3 Compliant
SSL-LX5093GD	Lumex Opto/Components Inc.	Green	Diffused	5mm, T-1 3/4	2.2V	20mA	30mcd	60°	—	565nm	Through Hole	8.60mm	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

LTL-4233 (Lite-On Inc.) provides the closest electrical and mechanical match to the TLHG5401. Both parts share identical T-1 3/4 form factor, 10mA test current, 2.1V forward voltage, and 569nm dominant wavelength. Height differential is minimal (8.60mm vs 12.80mm). This part is actively produced and ROHS3 compliant.

SSL-LX5093GD (Lumex Opto/Components Inc.) offers equivalent T-1 3/4 packaging with matching 60° viewing angle and 565nm peak wavelength. Forward voltage is 2.2V and test current is 20mA. This part maintains active production status and full ROHS3 compliance.

LTL2R3KG (Lite-On Inc.) provides T-1 3/4 form factor compatibility with higher brightness (180mcd) and 2.1V forward voltage. Suitable for applications where increased luminous intensity is acceptable. Actively produced and ROHS3 compliant.

5219674F (Dialight) offers active production status with 569nm dominant wavelength matching and 60° viewing angle. Lens size is 4.75mm diameter with 8.21mm height. Forward voltage is 2.1V at 20mA test current.

Secondary Substitutes (Restricted Product Status):

4300H5LC (Visual Communications Company - VCC) is marked "Not For New Designs" and should be used only for legacy system maintenance or repair applications where original part specifications are mandatory.

SLR-56MG3F (Rohm Semiconductor) is marked "Not For New Designs" and should be reserved for existing product support only.

Incompatible Options:

HLMP-3507-D00B2 and HLMP-3680-B00B2 (Broadcom Limited) feature right-angle mounting configuration, which is mechanically incompatible with radial through-hole applications. HLMP-3680-B00B2 operates at 5V, exceeding the TLHG5401 voltage specification.

151051VS04000 (Würth Elektronik) uses 5mm round form factor rather than T-1 3/4 package, creating potential mechanical fit issues in applications designed for the original part's 12.80mm height.

Frequently Asked Questions (FAQ)

Q: Can I use LTL-4233 as a direct replacement for TLHG5401?

A: LTL-4233 is mechanically and electrically compatible. Both parts use T-1 3/4 radial through-hole packaging, operate at approximately 2.1V forward voltage, and emit green light at 569nm dominant wavelength. The primary difference is test current (10mA for both) and brightness (19mcd vs 12mcd). LTL-4233 is actively produced and ROHS3 compliant.

Q: What is the difference between "Wavelength - Dominant" and "Wavelength - Peak"?

A: Wavelength - Dominant represents the primary color perception wavelength of the LED. Wavelength - Peak indicates the spectral peak of the LED's emission curve. Both values are provided in the specifications; either can be used for color matching purposes in indicator applications.

Q: Why are some substitute parts marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in end-of-life or obsolescence phases. Manufacturers recommend these parts only for maintenance, repair, or legacy product support. New designs should use actively produced alternatives.

Q: Can I use HLMP-3507-D00B2 instead of TLHG5401?

A: HLMP-3507-D00B2 features right-angle mounting, whereas TLHG5401 uses radial through-hole mounting. These are mechanically incompatible configurations. Right-angle packages are designed for circuit board edge mounting, not vertical through-hole insertion. This part is not suitable as a substitute.

Q: What does "T-1 3/4" mean?

A: T-1 3/4 refers to the LED package size designation. "T" indicates tubular shape, and "1 3/4" specifies the diameter in eighths of an inch (approximately 5.56mm). This is a standard through-hole LED form factor.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant, matching the TLHG5401 compliance status. This ensures compatibility with environmental and regulatory requirements.

Q: What viewing angle should I select?

A: The TLHG5401 has a 60° viewing angle. Substitute parts with 50° to 60° viewing angles (LTL-307G, SSL-LX5093GD, 5219674F) provide equivalent light distribution. Parts with narrower viewing angles (36° to 40°) concentrate light in a tighter cone, suitable for applications requiring directional indication.

Q: Can I use a higher brightness LED as a substitute?

A: Yes, if circuit design accommodates increased brightness. LTL2R3KG (180mcd) and 151051VS04000 (140mcd) provide significantly higher brightness than TLHG5401 (12mcd). Verify that series resistor values and power supply design can handle the increased current draw without affecting circuit performance.

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