TLHY6201 Yellow LED T-1 3/4 Through Hole - Equivalent & Substitute Parts

Part Overview

The TLHY6201 is a yellow 588nm LED indicator manufactured by Vishay Semiconductor Opto Division, designed for discrete indication applications in through-hole configurations. This part operates at 2.4V forward voltage with a 40mcd brightness rating and features a clear, domed lens in a standard 5mm T-1 3/4 package. The TLHY6201 is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications requiring yellow LED indication in this form factor.

Key Parameters

Parameter	TLHY6201 Value
Color	Yellow
Lens Transparency	Clear
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2.4V
Current - Test	10mA
Millicandela Rating	40mcd
Wavelength - Dominant	588nm
Mounting Type	Through Hole
Package / Case	Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TLHY6201 is determined by the following critical parameters:

Primary Matching Criteria:

Color: Yellow (587-589nm dominant wavelength range)
Lens Transparency: Clear
Lens Size: 5mm, T-1 3/4 form factor
Mounting Type: Through Hole, Radial package
Forward Voltage: 2.0V to 2.4V range
Current Rating: 10mA to 20mA test current
Millicandela Rating: 25mcd to 300mcd (brightness variation acceptable based on application requirements)

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories: direct yellow LED replacements with matching electrical characteristics, and alternative yellow LED options with different brightness or viewing angle specifications that maintain functional compatibility within the T-1 3/4 through-hole package standard.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status
TLHY6201	Vishay Semiconductor Opto Division	Yellow	Clear	2.4V	10mA	40mcd	588nm	28°	9.00mm	Obsolete
HLMP-3451	Broadcom Limited	Yellow	Diffused	2V	10mA	3.6mcd	585nm	50°	6.35mm	Active
HLMP-C315	Broadcom Limited	Yellow	Clear	2.1V	20mA	300mcd	589nm	15°	8.91mm	Active
HLMP-C323	Broadcom Limited	Yellow	Clear	2.1V	20mA	170mcd	589nm	25°	8.91mm	Active
LTL-307YE	Lite-On Inc.	Yellow	Clear	2.1V	20mA	40mcd	588nm	40°	8.60mm	Active
LTL-4254	Lite-On Inc.	Yellow	Clear	2.1V	10mA	90mcd	588nm	16°	8.60mm	Active
SLR-56YC3F	Rohm Semiconductor	Yellow	Clear	2.1V	10mA	25mcd	587nm	40°	8.90mm	Active
SLR-56YCT32	Rohm Semiconductor	Yellow	Clear	2.1V	10mA	25mcd	587nm	40°	8.90mm	Active
SSL-LX5093YT	Lumex Opto/Components Inc.	Yellow	Clear	2.1V	20mA	40mcd	585nm	30°	8.60mm	Active

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

LTL-307YE and SSL-LX5093YT are the preferred substitutes for TLHY6201 applications. Both parts maintain yellow color specification with clear lens transparency, operate within the 2.1V forward voltage range, and deliver 40mcd brightness matching the original part. Both manufacturers maintain active product status with ROHS3 compliance and unlimited moisture sensitivity rating. LTL-307YE operates at 20mA test current with 40° viewing angle, while SSL-LX5093YT also operates at 20mA with 30° viewing angle, providing flexibility for different optical requirements.

Secondary Substitutes (Brightness Variation):

LTL-4254 provides higher brightness (90mcd) at 10mA test current with narrower 16° viewing angle, suitable for applications requiring increased luminous intensity. SLR-56YC3F and SLR-56YCT32 offer lower brightness (25mcd) at 10mA with wider 40° viewing angle, appropriate for applications prioritizing broad light distribution over intensity.

Alternative with Lens Transparency Difference:

HLMP-3451 features diffused lens transparency instead of clear, reducing brightness to 3.6mcd but providing wider 50° viewing angle. This part is suitable only for applications where diffused light distribution is acceptable and brightness requirements are significantly lower than the original specification.

Not Recommended:

HLMP-C315 and HLMP-C323, while active and compliant, operate at 20mA test current with significantly higher brightness ratings (300mcd and 170mcd respectively) and narrower viewing angles (15° and 25°), making them unsuitable for direct substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3451 replace TLHY6201 directly?

A: HLMP-3451 is not a direct replacement. While it maintains yellow color and T-1 3/4 through-hole package, it features a diffused lens instead of clear, reducing brightness to 3.6mcd compared to TLHY6201's 40mcd. Use only if application requirements permit diffused light and lower brightness.

Q: What is the difference between LTL-307YE and SSL-LX5093YT?

A: Both parts provide equivalent brightness (40mcd) and forward voltage (2.1V) to TLHY6201. LTL-307YE offers 40° viewing angle with 8.60mm height, while SSL-LX5093YT provides 30° viewing angle with 8.60mm height. Selection depends on required light distribution angle for the specific application.

Q: Why do some substitutes operate at 20mA instead of 10mA?

A: Test current specification indicates the current at which brightness (mcd) is measured. Parts rated at 20mA test current will deliver specified brightness at higher current draw. Circuit design must accommodate the actual operating current requirements of the selected substitute.

Q: Are SLR-56YC3F and SLR-56YCT32 interchangeable?

A: Yes. Both parts are electrically and optically identical, with identical specifications. SLR-56YC3F is packaged in bulk, while SLR-56YCT32 is packaged in tape and box format. Selection depends on procurement and assembly requirements.

Q: Can I use HLMP-C315 as a substitute?

A: HLMP-C315 is not recommended for direct substitution. It operates at 20mA test current with 300mcd brightness and 15° viewing angle, significantly exceeding TLHY6201 specifications. Circuit redesign would be required to accommodate higher brightness and narrower viewing angle.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching TLHY6201 environmental and regulatory requirements. All parts carry EAR99 ECCN classification and HTSUS code 8541.41.0000.

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