TLHY6400 Equivalent & Substitute Parts

Part Overview

The TLHY6400 is a yellow diffused LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This T-1 3/4 (5mm) radial LED operates at 2.4V forward voltage with a 10mA test current and delivers 10 millicandela brightness at 588nm dominant wavelength. The part is currently active in production and ROHS3 compliant.

Equivalent and substitute parts are necessary when the TLHY6400 becomes unavailable, when design requirements demand alternative optical or electrical characteristics, or when supply chain optimization requires component standardization across manufacturing batches.

Key Parameters

Parameter	TLHY6400 Value
Color	Yellow
Lens Transparency	Diffused
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) Typical	2.4V
Current - Test	10mA
Millicandela Rating	10mcd
Wavelength - Dominant	588nm
Viewing Angle	60°
Mounting Type	Through Hole
Package / Case	Radial
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TLHY6400 is determined by the following criteria:

Primary Compatibility Parameters:

Color: Yellow
Mounting Type: Through Hole
Package / Case: Radial
Lens Style: Round with Domed Top
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Compatibility Parameters:

Lens Size: 5mm or 4.75mm diameter (T-1 3/4 form factor)
Voltage - Forward (Vf): 2.0V to 2.4V range
Current - Test: 10mA to 20mA range
Wavelength - Dominant: 585nm to 590nm range
Viewing Angle: 15° to 70° range
Millicandela Rating: 10mcd to 300mcd range

Substitute parts must maintain yellow color, through-hole radial mounting, and diffused or clear lens transparency. Forward voltage and test current variations within the specified ranges are acceptable for general indication applications. Wavelength variations within the yellow spectrum (585nm to 590nm) are functionally equivalent for visual indication purposes.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Test Current	Millicandela	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	RoHS Status
TLHY6400	Vishay	Yellow	Diffused	5mm, T-1 3/4	2.4V	10mA	10mcd	588nm	60°	9.00mm	Active	ROHS3
5219673F	Dialight	Yellow	Diffused	4.75mm Dia	2.1V	20mA	12.6mcd	588nm	60°	8.21mm	Active	ROHS3
HLMP-C315	Broadcom Limited	Yellow	Clear	5mm, T-1 3/4	2.1V	20mA	300mcd	589nm	15°	8.91mm	Active	ROHS3
HLMP-C323	Broadcom Limited	Yellow	Clear	5mm, T-1 3/4	2.1V	20mA	170mcd	589nm	25°	8.91mm	Active	ROHS3
LTL-307Y	Lite-On Inc.	Yellow	Diffused	5.00mm Dia	2.1V	20mA	29mcd	590nm	50°	8.60mm	Active	ROHS3
MV5353	onsemi	Yellow	Diffused	5mm, T-1 3/4	2.1V	20mA	15mcd	585nm	65°	8.89mm	Obsolete	Not Specified
MV5354A	onsemi	Yellow	Diffused	5mm, T-1 3/4	2.1V	20mA	25mcd	585nm	24°	8.89mm	Obsolete	Not Specified
MV6351	onsemi	Yellow	Diffused	5mm, T-1 3/4	2.2V	20mA	12mcd	585nm	70°	8.89mm	Obsolete	Not Specified
SLR-56YY3F	Rohm Semiconductor	Yellow	Diffused	5mm, T-1 3/4	2.1V	10mA	16mcd	587nm	40°	8.90mm	Not For New Designs	ROHS3
SSL-LX5093LYD	Lumex Opto/Components Inc.	Yellow	Diffused	5mm, T-1 3/4	2.1V	20mA	30mcd	585nm	60°	8.60mm	Active	ROHS3

Engineering Selection Recommendations

Recommended Active Substitutes (Preferred for New Designs):

The following parts are recommended as direct substitutes for the TLHY6400 based on active product status and full ROHS3 compliance:

SSL-LX5093LYD (Lumex): Diffused yellow LED with matching 60° viewing angle, 2.1V forward voltage, and 30mcd brightness. Identical T-1 3/4 form factor and radial package. Suitable for applications requiring equivalent optical characteristics with higher brightness capability.
LTL-307Y (Lite-On): Diffused yellow LED with 2.1V forward voltage and 29mcd brightness. T-1 3/4 form factor with 50° viewing angle. ROHS3 compliant and actively produced. Appropriate for general indication applications.
5219673F (Dialight): Diffused yellow LED with 2.1V forward voltage and 12.6mcd brightness. Slightly smaller lens diameter (4.75mm) but maintains radial through-hole mounting. ROHS3 compliant and actively produced.

Alternative Substitutes (Specific Application Requirements):

HLMP-C323 (Broadcom): Clear lens yellow LED with 170mcd brightness and 25° viewing angle. Higher brightness and narrower viewing angle suitable for applications requiring concentrated light output. ROHS3 compliant and actively produced.
HLMP-C315 (Broadcom): Clear lens yellow LED with 300mcd brightness and 15° viewing angle. Maximum brightness option for applications requiring high-intensity indication. ROHS3 compliant and actively produced.

Not Recommended for New Designs:

MV5353, MV5354A, MV6351 (onsemi): Obsolete product status. Avoid for new designs despite parameter compatibility.
SLR-56YY3F (Rohm): Not For New Designs status. Avoid for new production applications.

Frequently Asked Questions (FAQ)

Q: Can I use HLMP-C323 as a direct replacement for TLHY6400?

A: HLMP-C323 is electrically and mechanically compatible but differs in lens transparency (clear vs. diffused) and brightness (170mcd vs. 10mcd). It is suitable only if your application can tolerate higher brightness and narrower viewing angle (25° vs. 60°). The clear lens produces more concentrated light output compared to the diffused lens of the TLHY6400.

Q: What is the difference between diffused and clear lens LEDs?

A: Diffused lens LEDs scatter light over a wider viewing angle with lower peak brightness, suitable for general indication. Clear lens LEDs concentrate light into a narrower viewing angle with higher peak brightness, suitable for applications requiring focused light output. The TLHY6400 uses a diffused lens; clear lens alternatives like HLMP-C315 and HLMP-C323 provide different optical characteristics.

Q: Are onsemi MV5353, MV5354A, and MV6351 still available?

A: These parts are marked as obsolete. While limited inventory may exist, they are not recommended for new designs. Use active alternatives such as SSL-LX5093LYD, LTL-307Y, or 5219673F instead.

Q: Does forward voltage difference affect compatibility?

A: The TLHY6400 operates at 2.4V typical forward voltage. Substitutes operate at 2.0V to 2.2V. This 0.2V to 0.4V difference is acceptable in most indication applications. Verify your circuit design accommodates the lower forward voltage to ensure proper current limiting and brightness performance.

Q: Can I use SLR-56YY3F as a substitute?

A: SLR-56YY3F is electrically and mechanically compatible but carries a "Not For New Designs" status. It is acceptable only for replacement or repair of existing equipment. For new production, select from active alternatives.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All recommended active substitutes are ROHS3 compliant, ensuring environmental and regulatory compliance.

Q: Is the 4.75mm lens size of 5219673F compatible with 5mm mounting holes?

A: The 4.75mm lens diameter of 5219673F is slightly smaller than the standard 5mm T-1 3/4 form factor. Verify your PCB mounting hole specifications. The radial lead configuration remains compatible with standard through-hole mounting.

Q: Which substitute provides the closest match to TLHY6400 specifications?

A: SSL-LX5093LYD provides the closest match with identical 60° viewing angle, matching T-1 3/4 form factor, diffused lens, and comparable brightness (30mcd vs. 10mcd). Forward voltage is 2.1V versus 2.4V, a minor difference acceptable in most applications.

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