TLHG4205 Equivalent & Substitute Parts

Part Overview

The TLHG4205 is a green LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This T-1 (3mm) radial LED operates at 2.4V forward voltage with a 20mcd brightness rating and 569nm dominant wavelength. The part is currently active in production and fully RoHS3 compliant.

Substitute parts are necessary when the TLHG4205 becomes unavailable, when design requirements demand different electrical characteristics, or when alternative brightness levels or viewing angles are required for specific applications.

Key Parameters

Parameter	TLHG4205 Value
Manufacturer	Vishay Semiconductor Opto Division
Color	Green
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	20mcd
Wavelength - Dominant	569nm
Wavelength - Peak	565nm
Viewing Angle	44°
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 TLHG4205 is determined by the following criteria:

Primary Compatibility Requirements:

Color: Green
Mounting Type: Through Hole (Radial configuration)
Lens Size: 3mm, T-1
Lens Style: Round with Domed Top
Lens Transparency: Clear
Package / Case: Radial

Electrical Tolerance Parameters:

Voltage - Forward (Vf): 2.1V to 2.4V range acceptable
Current - Test: 10mA to 20mA acceptable
Millicandela Rating: 12mcd to 240mcd (application-dependent)
Wavelength - Dominant: 557nm to 573nm (green spectrum)

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed meet these criteria and are suitable for direct replacement in applications where the TLHG4205 is specified, provided the electrical and optical characteristics align with circuit design requirements.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	Inventory
TLHG4205	Vishay Semiconductor Opto Division	2.4V	10mA	20mcd	569nm	44°	6.10mm	Active	5200 Pcs
5219430F	Dialight	2.1V	10mA	50mcd	—	45°	5.89mm	Active	1204 Pcs
HLMP-1520	Broadcom Limited	2.1V	10mA	22mcd	569nm	45°	6.35mm	Active	19077 Pcs
HLMP-1521	Broadcom Limited	2.1V	10mA	22mcd	569nm	45°	6.35mm	Active	2220 Pcs
HLMP-Y502-F0000	Broadcom Limited	2.2V	20mA	40mcd	573nm	55°	5.20mm	Active	24988 Pcs
HLMP-Y802-F0000	Broadcom Limited	2.1V	20mA	240mcd	572nm	45°	5.20mm	Active	28111 Pcs
SLR-332MC3F	Rohm Semiconductor	2.1V	10mA	16mcd	572nm	85°	4.60mm	Not For New Designs	2173 Pcs
SSL-LX3044GT	Lumex Opto/Components Inc.	2.2V	20mA	40mcd	—	30°	4.60mm	Active	49557 Pcs
WP132XGT	Kingbright	2.2V	20mA	40mcd	568nm	50°	5.20mm	Active	1046 Pcs
WP710A10GT	Kingbright	2.2V	20mA	40mcd	568nm	34°	5.90mm	Active	10530 Pcs
WP710A10PGT	Kingbright	2.25V	20mA	12mcd	557nm	34°	5.90mm	Active	2001 Pcs

Engineering Selection Recommendations

For Direct Electrical Compatibility (Minimal Circuit Redesign):

HLMP-1520 and HLMP-1521 from Broadcom Limited are the closest electrical equivalents to the TLHG4205. Both operate at 2.1V forward voltage with 10mA test current and 22mcd brightness, matching the original design intent. Both parts are Active status and fully RoHS3 compliant. HLMP-1520 offers significantly higher inventory availability (19,077 pcs) compared to HLMP-1521 (2,220 pcs).

For Higher Brightness Applications:

HLMP-Y802-F0000 (Broadcom Limited) provides 240mcd brightness at 2.1V forward voltage, suitable for applications requiring enhanced visibility. This part operates at 20mA test current and maintains 45° viewing angle. Inventory availability is excellent at 28,111 pcs.

For Lower Power Budget Applications:

WP710A10PGT (Kingbright) operates at the lowest brightness level (12mcd) with 2.25V forward voltage and 20mA test current. This part is suitable for applications where reduced power consumption or lower brightness is acceptable.

For Existing Designs with 20mA Current Capability:

HLMP-Y502-F0000, SSL-LX3044GT, WP132XGT, and WP710A10GT all operate at 20mA test current with 40mcd brightness and 2.2V forward voltage. These parts are interchangeable with each other and suitable for designs that can accommodate higher current draw.

Parts to Avoid for New Designs:

SLR-332MC3F (Rohm Semiconductor) carries "Not For New Designs" status and should not be selected for new applications, despite meeting electrical and mechanical compatibility criteria.

Frequently Asked Questions (FAQ)

Q: Can I use HLMP-Y802-F0000 as a direct replacement for TLHG4205?

A: HLMP-Y802-F0000 is mechanically and electrically compatible but operates at significantly higher brightness (240mcd vs. 20mcd). Direct substitution is valid only if the circuit design can accommodate the increased light output. The forward voltage (2.1V) is lower than the original (2.4V), which may require circuit verification.

Q: What is the difference between HLMP-1520 and HLMP-1521?

A: Both parts are electrically and mechanically identical with matching specifications (2.1V, 10mA, 22mcd, 569nm). The primary difference is inventory availability, with HLMP-1520 offering substantially higher stock levels.

Q: Why do some substitute parts require 20mA instead of 10mA?

A: Parts designed for 20mA test current typically feature higher brightness ratings (40mcd or greater). Circuits using these parts must be designed to supply the higher current. Forward voltage remains within acceptable tolerance (2.1V to 2.4V range).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the TLHG4205.

Q: What does "Not For New Designs" mean for SLR-332MC3F?

A: This designation indicates the part is in mature or declining production status. While functionally compatible, Rohm Semiconductor does not recommend this part for new product development. Active alternatives should be prioritized.

Q: Can I use parts with different viewing angles interchangeably?

A: Viewing angle affects the light distribution pattern. Parts with narrower viewing angles (30° to 34°) concentrate light in a tighter beam, while wider angles (50° to 85°) distribute light more broadly. Selection depends on the specific application's optical requirements.

Q: What is the significance of wavelength differences (557nm to 573nm)?

A: All substitute parts emit green light within the visible spectrum. Wavelength variations between 557nm and 573nm represent different shades of green but are imperceptible to the human eye in typical indicator applications. Selection should be based on application requirements rather than minor wavelength variations.

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