TLHG4605 Equivalent & Substitute Parts

Part Overview

The TLHG4605 is a green diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for indication applications. This 3mm radial LED operates at 2.4V forward voltage with a 6mcd brightness rating and 569nm dominant wavelength. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the TLHG4605 becomes unavailable, when design requirements demand different electrical characteristics, or when alternative sourcing improves supply chain resilience. Equivalent parts must maintain compatibility with through-hole mounting, similar lens geometry, and comparable optical performance within acceptable application tolerances.

Key Parameters

Parameter	TLHG4605 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Green
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	3mm, T-1
Voltage - Forward (Vf) Typical	2.4V
Current - Test	10mA
Millicandela Rating	6mcd
Wavelength - Dominant	569nm
Wavelength - Peak	565nm
Viewing Angle	120°
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.10mm
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution logic for the TLHG4605 is based on the following critical parameters:

Primary Compatibility Criteria:

Color: Green (all substitutes must be green or yellow-green)
Mounting Type: Through Hole (radial configuration)
Lens Size: 3mm diameter or T-1 package equivalent
Lens Style: Round with domed top preferred for form factor compatibility
Lens Transparency: Diffused (primary) or clear (secondary, with brightness trade-off)

Electrical Compatibility Range:

Forward Voltage (Vf): 1.9V to 7.5V (application-dependent; lower voltage for low-power circuits, higher voltage for series resistor designs)
Test Current: 2mA to 20mA (determines brightness and power consumption)
Millicandela Rating: 1.6mcd to 50mcd (brightness selection based on visibility requirements)

Optical Compatibility:

Wavelength - Dominant: 565nm to 573nm (green to yellow-green spectrum)
Viewing Angle: 45° to 140° (application-dependent; narrow angles for focused indication, wide angles for omnidirectional visibility)

Regulatory & Environmental:

RoHS3 Compliance: Required
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred
Product Status: Active (ensures ongoing availability)

Substitutes are grouped into three categories based on electrical characteristics: low-voltage operation (1.9V–2.2V), standard operation (2.1V–2.4V), and high-voltage operation (5V–12V).

Parameter Comparison

Parameter	TLHG4605	151031VS06000	414SYGD/S530-E2	5219323F	5219326F	5219430F	HLMP-1640	HLMP-1641	HLMP-1790
Manufacturer	Vishay	Würth Elektronik	Everlight	Dialight	Dialight	Dialight	Broadcom	Broadcom	Broadcom
Color	Green	Green	Yellow-Green	Green	Green	Green	Green	Green	Green
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Clear	Diffused	Diffused	Diffused
Lens Style	Round Domed	Round Domed	Round Flat	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed	Round Domed
Lens Size	3mm, T-1	3.00mm	3.00mm	3.00mm	3.00mm	2.90mm	3mm, T-1	3mm, T-1	3mm, T-1
Vf (Typ)	2.4V	2.2V	2.0V	7.5V	1.9V	2.1V	5.0V	12.0V	1.9V
Current - Test	10mA	20mA	20mA	10mA	2mA	10mA	10mA	13mA	2mA
Millicandela Rating	6mcd	30mcd	12.5mcd	19mcd	1.6mcd	50mcd	1.6mcd	1.6mcd	2.3mcd
Wavelength - Dominant	569nm	568nm	573nm	565nm	—	—	569nm	569nm	569nm
Wavelength - Peak	565nm	560nm	575nm	565nm	565nm	565nm	565nm	565nm	565nm
Viewing Angle	120°	60°	140°	60°	60°	45°	60°	60°	50°
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Height (Max)	6.10mm	5.55mm	7.00mm	5.86mm	5.86mm	5.89mm	6.35mm	6.35mm	6.35mm
RoHS Status	ROHS3	ROHS3	—	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Substitutes (Minimal Design Changes):

151031VS06000 (Würth Elektronik) and HLMP-1790 (Broadcom) are the closest electrical equivalents. The 151031VS06000 operates at 2.2V with 30mcd brightness, requiring only minor resistor adjustment in series circuits. The HLMP-1790 matches the 1.9V–2.4V voltage range with 2.3mcd brightness and is pin-compatible. Both maintain ROHS3 compliance and active production status.

Brightness-Optimized Substitutes:

For applications requiring higher visibility, 5219430F (Dialight, 50mcd, 2.1V) and 414SYGD/S530-E2 (Everlight, 12.5mcd, 2.0V) provide increased luminous intensity. The 5219430F uses clear lens transparency instead of diffused, resulting in narrower viewing angle (45°) but higher brightness. The 414SYGD/S530-E2 offers yellow-green color (573nm dominant wavelength) with 140° viewing angle for omnidirectional applications.

Low-Power Substitutes:

5219326F (Dialight, 1.9V, 1.6mcd, 2mA) and HLMP-1790 (Broadcom, 1.9V, 2.3mcd, 2mA) are suitable for battery-powered or ultra-low-power circuits. Both operate at minimal current draw with forward voltages below 2V.

High-Voltage Substitutes:

5219323F (Dialight, 7.5V, 19mcd) and HLMP-1641 (Broadcom, 12V, 1.6mcd) accommodate series resistor designs in higher-voltage circuits. These parts eliminate the need for voltage regulation in 5V or 12V supply applications.

Compliance & Availability:

All recommended substitutes maintain ROHS3 compliance and active production status. Würth Elektronik (151031VS06000) and Broadcom (HLMP series) offer the highest inventory levels (17,531 and 4,525–24,307 units respectively), ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can I use 5219430F (clear lens) as a direct replacement for TLHG4605 (diffused lens)?

A: 5219430F is mechanically compatible but optically different. The clear lens produces a narrower viewing angle (45° vs. 120°) and higher brightness (50mcd vs. 6mcd). Use only if your application requires concentrated light output and can tolerate reduced omnidirectional visibility.

Q: What is the difference between HLMP-1640, HLMP-1641, and HLMP-1790?

A: These Broadcom parts differ in forward voltage and brightness. HLMP-1640 operates at 5V with 1.6mcd, HLMP-1641 at 12V with 1.6mcd, and HLMP-1790 at 1.9V with 2.3mcd. Select based on your circuit voltage and brightness requirements.

Q: Is 414SYGD/S530-E2 (yellow-green) acceptable as a substitute for TLHG4605 (green)?

A: 414SYGD/S530-E2 is electrically compatible but produces yellow-green light (573nm dominant wavelength) instead of pure green (569nm). Use only if your application accepts color variation or if yellow-green improves visibility in your specific environment.

Q: Which substitute offers the closest electrical match to TLHG4605?

A: HLMP-1790 (Broadcom) provides the closest match with 1.9V forward voltage, 2.3mcd brightness, and identical T-1 package geometry. It requires no circuit modifications and maintains full compatibility with the original design.

Q: Do all substitutes meet RoHS3 compliance?

A: All recommended substitutes except 414SYGD/S530-E2 explicitly state ROHS3 compliance. Verify RoHS status with your supplier before final selection if regulatory compliance is mandatory for your application.

Q: What viewing angle should I select for my application?

A: TLHG4605 provides 120° viewing angle for broad omnidirectional indication. Narrower angles (45°–60°) concentrate light for focused applications; wider angles (120°–140°) distribute light for general visibility. Select based on PCB layout and user viewing position requirements.

Q: Can I substitute parts with different test currents (2mA vs. 10mA vs. 20mA)?

A: Yes, but brightness scales with current. Lower test current (2mA) produces dimmer output; higher test current (20mA) produces brighter output. Adjust series resistor values to match your circuit's current budget and desired brightness level.

Q: Are HLMP-1640-B00A1 and HLMP-1640-B00A2 suitable substitutes?

A: These are right-angle variants of HLMP-1640, designed for surface-mount or angled PCB mounting. They are not suitable for standard through-hole radial applications requiring vertical lead orientation.

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