TLHY4200 Yellow LED T-1 Through Hole Equivalent & Substitute Parts

Part Overview

The TLHY4200 is a yellow 588nm LED indication component manufactured by Vishay Semiconductor Opto Division. This T-1 through-hole radial LED operates at 2.4V forward voltage with a 4mcd brightness rating and 44° viewing angle. The component is Active status and ROHS3 compliant, designed for standard indication applications requiring discrete yellow light emission.

Substitute parts are necessary when the primary TLHY4200 is unavailable due to inventory constraints, supply chain disruptions, or when alternative manufacturers' components meet the electrical and mechanical requirements of the application.

Key Parameters

Parameter	TLHY4200 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Yellow
Lens Size	3mm, T-1
Lens Style	Round with Domed Top
Lens Transparency	Clear
Voltage - Forward (Vf) Typical	2.4V
Current - Test	10mA
Millicandela Rating	4mcd
Wavelength - Dominant	588nm
Wavelength - Peak	585nm
Viewing Angle	44°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TLHY4200 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Parameters for Substitution:

Color: Yellow (primary requirement)
Lens Size: 3mm, T-1 (mechanical fit)
Mounting Type: Through Hole Radial (PCB compatibility)
Lens Transparency: Clear (optical consistency)
Voltage - Forward (Vf): 2.0V to 2.4V range (circuit compatibility)
Current - Test: 10mA to 20mA (driver circuit tolerance)
Wavelength - Dominant: 585nm to 590nm (yellow spectrum)

Primary Yellow LED Substitutes (Full Compatibility):

WP710A10YT (Kingbright): Yellow 588nm, 2.1V, 30mcd, 3mm T-1
LTL-4252N (Lite-On): Yellow 588nm, 2.1V, 19mcd, 3mm T-1
SSL-LX3044YT (Lumex): Yellow 585nm peak, 2.1V, 90mcd, 3mm T-1
SLR-332YC3F (Rohm): Yellow 587nm, 2.1V, 10mcd, 3.2mm

Secondary Substitutes (Orange Color, Similar Electrical Parameters):

HLMP-Y402-G0000 (Broadcom): Orange 605nm, 2.1V, 29mcd, 3mm T-1
WP710A10NT (Kingbright): Orange 602nm, 2.05V, 30mcd, 3mm T-1
WP132XNT (Kingbright): Orange 602nm, 2.05V, 20mcd, 3mm T-1

Lower Brightness Alternative (Yellow):

HLMP-1420 / HLMP-1421 (Broadcom): Yellow 585nm, 2V, 15mcd, 3mm T-1

Lower Brightness Alternative (Yellow, Different Lens):

5219431F (Dialight): Yellow, 30mcd, 2.9mm, 5.89mm height

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Current - Test	mcd	Wavelength - Dominant	Wavelength - Peak	Viewing Angle	Lens Size	Height (Max)	RoHS Status
TLHY4200	Vishay	Yellow	2.4V	10mA	4	588nm	585nm	44°	3mm, T-1	6.10mm	ROHS3
WP710A10YT	Kingbright	Yellow	2.1V	20mA	30	588nm	590nm	34°	3mm, T-1	5.90mm	ROHS3
LTL-4252N	Lite-On	Yellow	2.1V	10mA	19	588nm	585nm	45°	3mm, T-1	5.85mm	ROHS3
SSL-LX3044YT	Lumex	Yellow	2.1V	20mA	90	—	585nm	30°	3mm, T-1	4.60mm	ROHS3
SLR-332YC3F	Rohm	Yellow	2.1V	10mA	10	587nm	—	85°	3.2mm	4.60mm	ROHS3
HLMP-1420	Broadcom	Yellow	2V	10mA	15	585nm	583nm	45°	3mm, T-1	6.35mm	ROHS3
HLMP-1421	Broadcom	Yellow	2V	10mA	15	585nm	583nm	45°	3mm, T-1	6.35mm	ROHS3
HLMP-Y402-G0000	Broadcom	Orange	2.1V	20mA	29	605nm	610nm	45°	3mm, T-1	5.20mm	ROHS3
WP710A10NT	Kingbright	Orange	2.05V	20mA	30	602nm	607nm	34°	3mm, T-1	5.90mm	ROHS3
WP132XNT	Kingbright	Orange	2.05V	20mA	20	602nm	607nm	50°	3mm, T-1	5.20mm	ROHS3
5219431F	Dialight	Yellow	—	20mA	30	—	—	—	2.9mm	5.89mm	ROHS3

Engineering Selection Recommendations

Preferred Yellow LED Substitutes (Highest Compatibility):

LTL-4252N and HLMP-1420/HLMP-1421 provide the closest electrical match to TLHY4200. Both operate at reduced forward voltage (2.0V to 2.1V) compared to the original 2.4V specification, allowing direct circuit substitution with standard current-limiting resistor designs. All three parts maintain 10mA test current, 3mm T-1 form factor, and ROHS3 compliance. LTL-4252N offers identical wavelength (588nm dominant) and similar brightness (19mcd), while HLMP series provides slightly lower brightness (15mcd) with 585nm wavelength.

High-Brightness Yellow Alternative:

SSL-LX3044YT (Lumex) operates at 2.1V with 90mcd brightness, significantly exceeding the original 4mcd rating. This part is suitable for applications requiring enhanced visibility. The narrower 30° viewing angle and reduced height (4.60mm) must be evaluated against application requirements.

Wide-Angle Yellow Alternative:

SLR-332YC3F (Rohm) provides 85° viewing angle with 2.1V operation and 10mcd brightness. The 3.2mm lens diameter represents a minor mechanical variation from the standard 3mm T-1 specification.

Orange LED Substitutes (Color Variation):

HLMP-Y402-G0000, WP710A10NT, and WP132XNT are orange LEDs (602nm to 605nm) with electrical parameters compatible to TLHY4200. These parts are suitable only when orange indication is functionally equivalent to yellow in the application circuit.

All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can WP710A10YT directly replace TLHY4200 without circuit modification?

A: Yes. WP710A10YT operates at 2.1V forward voltage compared to TLHY4200's 2.4V. Both parts accept 10mA to 20mA test current. Standard current-limiting resistor designs accommodate this voltage difference without modification. Both parts use identical 3mm T-1 through-hole radial packaging.

Q: What is the brightness difference between TLHY4200 and SSL-LX3044YT?

A: TLHY4200 is rated 4mcd at 10mA test current. SSL-LX3044YT is rated 90mcd at 20mA test current. SSL-LX3044YT provides approximately 22.5 times greater brightness. This part is suitable for applications requiring enhanced visibility but may require circuit current adjustment.

Q: Are orange LED substitutes (WP710A10NT, HLMP-Y402-G0000) electrically compatible?

A: Yes, orange LEDs are electrically compatible. Forward voltage ranges from 2.05V to 2.1V, matching yellow LED specifications. However, orange LEDs emit at 602nm to 605nm wavelength versus yellow at 585nm to 590nm. Substitution is valid only when application function does not require specific yellow color indication.

Q: What is the mechanical difference between 3mm and 3.2mm lens sizes?

A: SLR-332YC3F uses 3.2mm lens diameter versus standard 3mm T-1 specification. This represents a 0.2mm increase in lens diameter. PCB mounting holes designed for 3mm T-1 components will accommodate 3.2mm with minimal clearance variation. Verify mechanical fit in confined spaces.

Q: Which substitute offers the closest electrical match to TLHY4200?

A: LTL-4252N and HLMP-1420 provide closest electrical compatibility. Both operate at 2.0V to 2.1V forward voltage with 10mA test current, matching the original circuit design intent. LTL-4252N maintains identical 588nm dominant wavelength. HLMP-1420 provides 585nm wavelength with slightly lower brightness (15mcd versus 4mcd).

Q: Can HLMP-1420 and HLMP-1421 be used interchangeably?

A: Yes. Both parts are electrically and mechanically identical. HLMP-1420 and HLMP-1421 share identical specifications: 2V forward voltage, 10mA test current, 15mcd brightness, 585nm wavelength, 3mm T-1 form factor, and 6.35mm maximum height. Selection between these parts depends on inventory availability and supplier preference.

Q: What viewing angle considerations apply when selecting a substitute?

A: TLHY4200 specifies 44° viewing angle. Substitutes range from 30° (SSL-LX3044YT, narrow beam) to 85° (SLR-332YC3F, wide beam). Narrow-angle parts concentrate light intensity in a specific direction, suitable for focused indication. Wide-angle parts distribute light across broader area, suitable for general visibility. Application mounting position and observer angle determine appropriate viewing angle specification.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, matching TLHY4200 regulatory requirement. All parts also maintain MSL 1 (Unlimited) moisture sensitivity level, ensuring equivalent environmental handling and storage requirements.

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