TLHR4605 Equivalent & Substitute Parts

Part Overview

The TLHR4605 is a red diffused LED indicator from Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This T-1 form factor LED operates at 2V forward voltage with a 6mcd brightness rating and 619nm dominant wavelength. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the TLHR4605 becomes unavailable, when design requirements demand different electrical characteristics such as forward voltage or brightness levels, or when alternative packaging formats are required for manufacturing optimization.

Key Parameters

Parameter	TLHR4605 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Red
Lens Transparency	Diffused
Lens Size	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V
Current - Test	10mA
Millicandela Rating	6mcd
Viewing Angle	120°
Wavelength - Dominant	619nm
Wavelength - Peak	635nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution validity for the TLHR4605 is determined by the following critical parameters:

Mechanical Compatibility: Lens size (3mm T-1), lens style (round with domed top), mounting type (through hole), and package configuration (radial) must match or be functionally equivalent.

Optical Characteristics: Color (red), lens transparency (diffused), and wavelength range (dominant wavelength 619-640nm, peak wavelength 635-660nm) define the visual output category.

Electrical Parameters: Forward voltage (Vf) tolerance, test current, and brightness rating (millicandela) determine circuit compatibility and application suitability.

Compliance & Status: RoHS3 compliance, moisture sensitivity level (MSL 1), and active product status ensure regulatory alignment and supply chain reliability.

Substitute parts are grouped by their ability to function within these parameter boundaries while maintaining through-hole T-1 form factor compatibility.

Parameter Comparison

Parameter	TLHR4605	151031SS06000	4300F1LC	5219215F	HLMP-1600	HLMP-1601	HLMP-1700	HLMP-1700-B0002	HLMP-K101	HLMP-K150	HLMP-K150-C0002
Manufacturer	Vishay	Würth Elektronik	VCC	Dialight	Broadcom	Broadcom	Broadcom	Broadcom	Broadcom	Broadcom	Broadcom
Color	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	3mm, T-1	3.00mm Dia	3mm, T-1	3.00mm Dia	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1	3mm, T-1
Voltage - Forward (Vf) (Typ)	2V	2.2V	1.8V	7.5V	5V	12V	1.7V	1.7V	1.8V	1.7V	1.7V
Current - Test	10mA	20mA	2mA	—	10mA	13mA	2mA	2mA	20mA	1mA	1mA
Millicandela Rating	6mcd	35mcd	1.8mcd	29mcd	2.1mcd	2.1mcd	2.1mcd	2.1mcd	45mcd	2mcd	2mcd
Viewing Angle	120°	60°	50°	60°	60°	60°	50°	50°	60°	60°	60°
Wavelength - Dominant	619nm	640nm	—	625nm	626nm	626nm	626nm	626nm	637nm	640nm	640nm
Wavelength - Peak	635nm	650nm	635nm	635nm	635nm	635nm	635nm	635nm	645nm	660nm	660nm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Height (Max)	6.10mm	5.55mm	6.35mm	5.86mm	6.35mm	6.35mm	6.35mm	6.35mm	6.35mm	6.35mm	6.35mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active
Packaging Format	Bulk	Bulk	Bulk	Bulk	Bulk	Bulk	Bulk	Cut Tape (CT)	Bulk	Bulk	Cut Tape (CT)

Engineering Selection Recommendations

Direct Mechanical Substitutes (T-1 Form Factor, 3mm Lens, Through Hole Radial):

HLMP-1700, HLMP-1700-B0002, HLMP-K150, and HLMP-K150-C0002 maintain identical mechanical compatibility with the TLHR4605. These Broadcom parts preserve the T-1 package geometry and through-hole mounting configuration. HLMP-1700-B0002 and HLMP-K150-C0002 are available in cut tape packaging for automated assembly environments, while bulk packaging variants support manual or tray-fed processes.

Electrical Considerations:

The TLHR4605 operates at 2V forward voltage with 10mA test current. Substitute selection depends on circuit design constraints:

HLMP-1700 and HLMP-1700-B0002 operate at 1.7V with 2mA test current, suitable for low-power indicator circuits with reduced current draw.

HLMP-K150 and HLMP-K150-C0002 operate at 1.7V with 1mA test current, appropriate for ultra-low-power applications.

HLMP-1600 operates at 5V with 10mA test current, compatible with higher-voltage supply rails.

HLMP-1601 operates at 12V with 13mA test current, designed for 12V system integration.

Brightness Compatibility:

The TLHR4605 provides 6mcd brightness. HLMP-1700, HLMP-1700-B0002, HLMP-1600, HLMP-1601, HLMP-K150, and HLMP-K150-C0002 all deliver 2.1mcd or 2mcd, representing lower brightness output suitable for indicator applications where reduced luminous intensity is acceptable.

HLMP-K101 provides 45mcd brightness, appropriate for applications requiring higher visibility.

151031SS06000 from Würth Elektronik provides 35mcd brightness with 2.2V forward voltage and 20mA test current, offering higher brightness with slightly elevated voltage and current requirements.

Wavelength Alignment:

All substitute parts maintain red color classification within the 619-640nm dominant wavelength range and 635-660nm peak wavelength range, ensuring consistent visual appearance across the red spectrum.

Compliance & Product Status:

All listed substitutes maintain ROHS3 compliance and MSL 1 rating. HLMP series parts from Broadcom, 151031SS06000 from Würth Elektronik, and 5219215F from Dialight are active products. The 4300F1LC from VCC carries "Not For New Designs" status and should be avoided for new development.

Packaging Format Selection:

Bulk packaging (standard for most substitutes) supports manual assembly and tray-fed processes. Cut tape variants (HLMP-1700-B0002, HLMP-K150-C0002) integrate with automated pick-and-place equipment for high-volume manufacturing.

Frequently Asked Questions (FAQ)

Q: Can HLMP-1700 directly replace TLHR4605 in existing designs?

A: HLMP-1700 maintains mechanical compatibility (T-1 form factor, 3mm lens, through-hole radial package) and operates within the red LED indicator category. However, electrical differences exist: HLMP-1700 operates at 1.7V with 2mA test current versus TLHR4605 at 2V with 10mA. Circuit redesign may be necessary to accommodate lower voltage and current requirements. Brightness output differs (2.1mcd versus 6mcd), which may affect visibility in the application.

Q: What is the difference between HLMP-1700 and HLMP-1700-B0002?

A: Both parts are electrically and optically identical (1.7V forward voltage, 2mA test current, 2.1mcd brightness, 626nm dominant wavelength). The difference is packaging format: HLMP-1700 is supplied in bulk, while HLMP-1700-B0002 is supplied in cut tape (CT) format. Cut tape packaging is optimized for automated assembly equipment, while bulk packaging supports manual or tray-fed processes.

Q: Why does 5219215F have 7.5V forward voltage when TLHR4605 operates at 2V?

A: The 5219215F from Dialight is a different electrical design within the red diffused LED category. Higher forward voltage indicates different semiconductor junction characteristics and internal structure. This part is suitable only for circuits designed for 7.5V operation and cannot be substituted in 2V circuits without complete circuit redesign.

Q: Is 4300F1LC from VCC a viable substitute?

A: 4300F1LC maintains mechanical compatibility (T-1 form factor, 3mm lens, through-hole radial) and operates at 1.8V with 2mA test current. However, this part carries "Not For New Designs" product status, indicating end-of-life or obsolescence trajectory. For new product development, active alternatives such as HLMP-1700 or HLMP-K101 are recommended.

Q: How does brightness rating affect substitution decisions?

A: Brightness (millicandela rating) determines indicator visibility in the application environment. TLHR4605 provides 6mcd. Lower-brightness substitutes (HLMP-1700 at 2.1mcd, HLMP-K150 at 2mcd) are suitable for applications where reduced luminous intensity is acceptable or preferred. Higher-brightness substitutes (HLMP-K101 at 45mcd, 151031SS06000 at 35mcd) provide enhanced visibility for applications requiring greater indicator prominence.

Q: What viewing angle differences exist among substitutes?

A: TLHR4605 provides 120° viewing angle. Most substitutes offer 60° viewing angle (151031SS06000, 5219215F, HLMP-1600, HLMP-1601, HLMP-K101, HLMP-K150 variants), representing narrower light distribution. HLMP-1700 and HLMP-1700-B0002 provide 50° viewing angle. Narrower viewing angles concentrate light intensity in a specific direction, while wider angles distribute light across a broader field.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, matching the TLHR4605 regulatory status. This ensures compatibility with RoHS3-regulated supply chains and end-use applications.

Q: Can 151031SS06000 from Würth Elektronik substitute for TLHR4605?

A: 151031SS06000 maintains mechanical compatibility (3mm diffused lens, through-hole radial package) and operates within the red LED indicator category. Electrical differences include 2.2V forward voltage (versus 2V), 20mA test current (versus 10mA), and 35mcd brightness (versus 6mcd). This part is suitable for applications requiring higher brightness output and can tolerate slightly elevated voltage and current requirements. Circuit validation is necessary to confirm compatibility.

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