TLHP4201 Equivalent & Substitute Parts

Part Overview

The TLHP4201 is a green 560nm LED indication component manufactured by Vishay Semiconductor Opto Division, configured as a discrete 2.4V radial through-hole device in T-1 3mm package format. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts maintain functional compatibility while substitute parts offer alternative electrical and mechanical characteristics within acceptable operating parameters.

Key Parameters

Parameter	TLHP4201 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Green
Lens Transparency	Clear
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	2.4V
Current - Test	10mA
Viewing Angle	44°
Millicandela Rating	13mcd
Wavelength - Dominant	560nm
Wavelength - Peak	555nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution logic for the TLHP4201 is determined by the following critical parameters: color (green), lens transparency (clear), package format (T-1 3mm radial through-hole), forward voltage range (2.1V to 2.4V), and mounting configuration. Parts are grouped into two categories:

Parametric Equivalents: Parts maintaining identical or near-identical electrical and mechanical specifications with active product status. The TLHG4201 from Vishay represents a direct parametric equivalent with matching forward voltage (2.4V), test current (10mA), viewing angle (44°), and physical dimensions.

Functional Substitutes: Parts with compatible mounting, package, and color characteristics but differing in forward voltage (2.1V), test current (10mA to 20mA), millicandela rating, or wavelength specifications. These parts are functionally interchangeable in applications where the circuit design accommodates the parameter variations.

Parameter Comparison

Part Number	Manufacturer	Color	Vf (Typ)	Test Current	mcd Rating	Wavelength Peak	Viewing Angle	Height (Max)	Product Status	Packaging
TLHP4201	Vishay	Green	2.4V	10mA	13mcd	555nm	44°	6.10mm	Obsolete	Radial
TLHG4201	Vishay	Green	2.4V	10mA	15mcd	565nm	44°	6.10mm	Active	Bulk
5219430F	Dialight	Green	2.1V	10mA	50mcd	565nm	45°	5.89mm	Active	Bulk
HLMP-1520	Broadcom Limited	Green	2.1V	10mA	22mcd	565nm	45°	6.35mm	Active	Bulk
HLMP-1521	Broadcom Limited	Green	2.1V	10mA	22mcd	565nm	45°	6.35mm	Active	Bulk
HLMP-1521-E0002	Broadcom Limited	Green	2.1V	10mA	22mcd	565nm	45°	6.35mm	Active	Tape & Reel
MV7442	Fairchild Semiconductor	Green	2.1V	20mA	120mcd	565nm	45°	6.30mm	Active	Bulk
SLI-343MC3F	Rohm Semiconductor	Yellow-Green	2.1V	20mA	200mcd	572nm	40°	5.60mm	Active	Bulk
SLI-343MG3F	Rohm Semiconductor	Green	2.1V	20mA	180mcd	572nm	40°	5.60mm	Not For New Designs	Bulk
SLI-343P8C3F	Rohm Semiconductor	Green	2.2V	20mA	22mcd	560nm	40°	5.60mm	Active	Bulk
SLR-343PC3F	Rohm Semiconductor	Green	2.1V	10mA	6.3mcd	560nm	40°	5.60mm	Last Time Buy	Bulk

Engineering Selection Recommendations

Primary Recommendation - Parametric Equivalent: TLHG4201 from Vishay Semiconductor Opto Division is the direct parametric equivalent with active product status. This part maintains identical forward voltage (2.4V), test current (10mA), viewing angle (44°), and physical dimensions as the obsolete TLHP4201. Both parts are ROHS3 compliant and carry identical compliance certifications. Selection of TLHG4201 requires minimal circuit redesign and maintains full functional compatibility.

Secondary Recommendations - Active Substitutes: HLMP-1520 and HLMP-1521 from Broadcom Limited are active green LED components with compatible T-1 3mm through-hole packages. These parts operate at 2.1V forward voltage with 10mA test current, requiring circuit voltage adjustment. Both maintain ROHS3 compliance and offer 22mcd brightness rating with 45° viewing angle. HLMP-1521-E0002 provides identical electrical specifications in Tape & Reel packaging for automated assembly applications.

Alternative Substitutes with Parameter Variations: MV7442 from Fairchild Semiconductor operates at 2.1V with 20mA test current and delivers 120mcd brightness, suitable for applications requiring higher luminous intensity. SLI-343P8C3F from Rohm Semiconductor (EXCELED™ series) provides active status with 2.2V forward voltage and 22mcd rating, maintaining 560nm dominant wavelength matching the original part. SLR-343PC3F from Rohm is classified as Last Time Buy and should not be selected for new designs.

Parts to Avoid: SLI-343MG3F carries "Not For New Designs" status and should not be selected for new applications. SLI-343MC3F is a yellow-green variant (572nm peak wavelength) and represents a color deviation from the original green specification.

Frequently Asked Questions (FAQ)

Q: Can TLHG4201 directly replace TLHP4201 without circuit modification? A: Yes. TLHG4201 maintains identical forward voltage (2.4V), test current (10mA), viewing angle (44°), and T-1 3mm package dimensions. Direct substitution is possible without circuit redesign.

Q: What circuit adjustments are required when substituting with HLMP-1520 or HLMP-1521? A: These parts operate at 2.1V forward voltage compared to TLHP4201's 2.4V. Circuit current-limiting resistor values must be recalculated to accommodate the 0.3V voltage difference. Test current remains 10mA, maintaining compatibility with existing current-limiting designs.

Q: Why is MV7442 listed as a substitute if it requires 20mA test current? A: MV7442 is functionally compatible for applications where circuit design accommodates 20mA operation. The part delivers 120mcd brightness at 2.1V forward voltage with T-1 3mm package format. Circuit redesign is required to support the doubled test current specification.

Q: Are wavelength differences between 555nm and 565nm significant for substitution? A: Wavelength differences within the green spectrum (555nm to 572nm) are typically acceptable for indication applications where precise color matching is not critical. Applications requiring specific wavelength characteristics should verify compatibility with end-use requirements.

Q: What is the difference between HLMP-1521 and HLMP-1521-E0002? A: Both parts are electrically and mechanically identical. HLMP-1521-E0002 is packaged in Tape & Reel format for automated assembly, while HLMP-1521 is supplied in Bulk packaging. Selection depends on assembly process requirements.

Q: Can SLI-343MC3F (yellow-green) be used as a substitute for the green TLHP4201? A: SLI-343MC3F is a yellow-green variant with 572nm peak wavelength, representing a color deviation from the original green specification. Substitution is only acceptable if application requirements permit yellow-green indication instead of pure green.

Q: Why should SLI-343MG3F be avoided despite high availability? A: SLI-343MG3F carries "Not For New Designs" product status, indicating manufacturer discontinuation for new applications. While inventory is available, this part should not be selected for new designs or long-term production requirements.

Q: What packaging options are available for high-volume production? A: HLMP-1521-E0002 is available in Tape & Reel packaging suitable for automated pick-and-place assembly. All other active substitutes are supplied in Bulk packaging, requiring manual or semi-automated assembly processes.

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