TLHG4201 Equivalent & Substitute Parts

Part Overview

The TLHG4201 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 15mcd brightness rating and 569nm dominant wavelength. The part is currently active in production and RoHS3 compliant.

Substitute parts are necessary when the TLHG4201 becomes unavailable, when design requirements demand different electrical characteristics such as lower forward voltage or higher brightness, or when alternative manufacturers' components are preferred for supply chain diversification.

Key Parameters

Parameter	TLHG4201 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	15mcd
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 eligibility for the TLHG4201 is determined by the following criteria:

Mandatory Parameters (Must Match or Be Compatible):

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

Electrical Parameters (Allowable Variation):

Voltage - Forward (Vf): 2.1V to 2.4V range acceptable for standard indicator applications
Current - Test: 10mA to 20mA acceptable
Millicandela Rating: 12mcd to 240mcd (brightness variation acceptable depending on application requirements)
Wavelength - Dominant: 557nm to 573nm (green spectrum range)

Compliance Parameters:

RoHS Status: ROHS3 Compliant required
Moisture Sensitivity Level: 1 (Unlimited) required

All substitute parts listed meet these criteria and are electrically and mechanically compatible with the TLHG4201 in standard indicator circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vf (Typ)	Current - Test	mcd Rating	Wavelength - Dominant	Viewing Angle	Height (Max)	Product Status	Inventory
TLHG4201	Vishay Semiconductor Opto Division	2.4V	10mA	15mcd	569nm	44°	6.10mm	Active	3683 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 Replacement (Lowest Risk): HLMP-1520 and HLMP-1521 from Broadcom Limited are the closest electrical matches, both operating at 2.1V with 22mcd brightness and 569nm wavelength. Both parts are Active status and RoHS3 compliant. HLMP-1520 offers significantly higher inventory (19077 Pcs) compared to HLMP-1521 (2220 Pcs).

For Lower Forward Voltage Applications: 5219430F (Dialight), HLMP-1520, HLMP-1521, and SLR-332MC3F all operate at 2.1V, reducing power dissipation in series resistor circuits. All are RoHS3 compliant and Active status except SLR-332MC3F, which is marked Not For New Designs.

For Higher Brightness Requirements: HLMP-Y802-F0000 (240mcd) and HLMP-Y502-F0000 (40mcd) provide significantly increased luminous intensity. Both require 20mA test current and are Active status with robust inventory availability.

For New Designs: Avoid SLR-332MC3F (Rohm Semiconductor), which carries Not For New Designs status. Select from Active status parts: Broadcom HLMP series, Dialight 5219430F, Lumex SSL-LX3044GT, or Kingbright WP series.

For Supply Chain Continuity: SSL-LX3044GT (Lumex) and HLMP-Y802-F0000 (Broadcom) offer the highest inventory levels (49557 Pcs and 28111 Pcs respectively), ensuring long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I use HLMP-Y802-F0000 as a direct replacement for TLHG4201? A: HLMP-Y802-F0000 is electrically compatible but operates at higher brightness (240mcd vs. 15mcd) and requires 20mA test current instead of 10mA. Circuit resistor values must be recalculated. Mechanical compatibility is confirmed (T-1, 3mm, radial package).

Q: What is the difference between HLMP-1520 and HLMP-1521? A: Both parts are electrically and mechanically identical (2.1V, 22mcd, 569nm, T-1 package). The primary difference is inventory availability: HLMP-1520 has 19077 Pcs in stock versus 2220 Pcs for HLMP-1521.

Q: Why is SLR-332MC3F marked "Not For New Designs"? A: SLR-332MC3F carries Not For New Designs status from Rohm Semiconductor, indicating the manufacturer is discontinuing this product line. New designs should select from Active status alternatives.

Q: Can I substitute WP710A10PGT for TLHG4201 if brightness is not critical? A: WP710A10PGT is mechanically compatible (T-1, 3mm, radial) but operates at lower brightness (12mcd vs. 15mcd) and different wavelength (557nm vs. 569nm). Substitution is possible only if the application tolerates reduced brightness and slightly different green hue.

Q: What is the impact of forward voltage differences between TLHG4201 (2.4V) and substitute parts (2.1V to 2.25V)? A: Lower forward voltage reduces power dissipation and allows use of higher series resistor values for the same current. Circuit design must account for this difference. Typical indicator applications tolerate this variation without redesign.

Q: Are all listed substitute parts RoHS3 compliant? A: Yes. All substitute parts listed carry RoHS3 Compliant status and Moisture Sensitivity Level 1 (Unlimited), matching the TLHG4201 compliance profile.

Q: Which substitute offers the best viewing angle match to TLHG4201 (44°)? A: HLMP-1520 and HLMP-1521 (45°) and HLMP-Y802-F0000 (45°) provide the closest viewing angle match. WP710A10GT and WP710A10PGT offer narrower angles (34°), while SSL-LX3044GT offers wider angle (30°) and SLR-332MC3F offers very wide angle (85°).

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