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TLHG6405 Equivalent & Substitute Parts
Part Overview
The TLHG6405 is a green diffused LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This component operates at 2.4V forward voltage with a 15mcd brightness rating and 569nm dominant wavelength. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with the original electrical specifications, mechanical form factor, and mounting requirements while considering product availability and active status.
Substiute Parts
Key Parameters
| Parameter | TLHG6405 Specification |
|---|---|
| Color | Green |
| Lens Transparency | Diffused |
| Lens Size | 5mm, T-1 3/4 |
| Voltage - Forward (Vf) (Typ) | 2.4V |
| Current - Test | 10mA |
| Millicandela Rating | 15mcd |
| Wavelength - Dominant | 569nm |
| Viewing Angle | 60° |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Height (Max) | 9.10mm |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:
Primary Compatibility Criteria:
- Color: Green or Yellow-Green (within visible spectrum range 565-575nm)
- Lens Transparency: Diffused
- Mounting Type: Through Hole
- Package / Case: Radial
- Lens Style: Round with Domed Top
- RoHS Status: ROHS3 Compliant
Electrical Tolerance Parameters:
- Voltage - Forward (Vf): 1.8V to 2.4V range acceptable
- Current - Test: 2mA to 20mA range acceptable
- Millicandela Rating: 2.3mcd to 200mcd range acceptable
- Wavelength - Dominant: 565nm to 575nm range acceptable
Mechanical Compatibility:
- Lens Size: 5mm diameter or T-1 3/4 form factor
- Height (Max): 6.30mm to 12.80mm range acceptable
The substitute parts listed below meet these criteria and are available in active production status or with documented inventory.
Parameter Comparison
| Part Number | Manufacturer | Color | Vf (Typ) | Current - Test | mcd Rating | Wavelength - Dominant | Viewing Angle | Height (Max) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| TLHG6405 | Vishay Semiconductor Opto Division | Green | 2.4V | 10mA | 15mcd | 569nm | 60° | 9.10mm | Obsolete | ROHS3 Compliant |
| TLHG6420 | Vishay Semiconductor Opto Division | Green | 2.1V | 20mA | 20mcd | 570nm | 50° | 12.80mm | Active | Not specified |
| 1383SYGD/S530-E2 | Everlight Electronics Co Ltd | Yellow-Green | 2V | 20mA | 200mcd | 573nm | 25° | 8.90mm | Active | ROHS3 Compliant |
| 151051VS04000 | Würth Elektronik | Green | 2.1V | 20mA | 140mcd | 572nm | 40° | 8.95mm | Active | ROHS3 Compliant |
| 323-2SYGD/S530-E2 | Everlight Electronics Co Ltd | Yellow-Green | 2V | 20mA | 80mcd | 573nm | 60° | 6.30mm | Active | ROHS3 Compliant |
| 336SYGSYGD/S530-E2 | Everlight Electronics Co Ltd | Yellow-Green | 2V | 20mA | 16mcd | 573nm | 90° | 8.90mm | Active | Not specified |
| 4300H5LC | Visual Communications Company - VCC | Green | 1.8V | 2mA | 2.3mcd | 565nm | 50° | 8.89mm | Not For New Designs | ROHS3 Compliant |
| 5219674F | Dialight | Green | 2.1V | 20mA | 40mcd | 569nm | 60° | 8.21mm | Active | ROHS3 Compliant |
| HLMP-3507-D0001 | Broadcom Limited | Green | 2.1V | 10mA | 4.2mcd | 569nm | 60° | 9.19mm | Active | ROHS3 Compliant |
| HLMP-3507-D00B2 | Broadcom Limited | Green | 2.1V | 10mA | 4.2mcd | 565nm | Not specified | Not specified | Active | ROHS3 Compliant |
| HLMP-3680-B00B2 | Broadcom Limited | Green | 5V | 10mA | 1.6mcd | 565nm | 60° | Not specified | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Recommended Primary Substitutes (Active Status, Full ROHS3 Compliance):
The 5219674F (Dialight) and 151051VS04000 (Würth Elektronik) are the most direct substitutes. Both maintain green color, 569-572nm wavelength range, 2.1V forward voltage, and 60° or 40° viewing angles. Both are in active production with ROHS3 compliance and adequate brightness ratings (40mcd and 140mcd respectively) for indicator applications.
The HLMP-3507-D0001 (Broadcom Limited) provides an alternative with identical 2.1V forward voltage, 10mA test current matching the original specification, and 569nm wavelength. This part maintains the closest electrical profile to the TLHG6405.
Secondary Substitutes (Active Status, Specific Application Considerations):
The TLHG6420 (Vishay Semiconductor Opto Division) offers continuity within the original manufacturer's product line. It operates at 2.1V with increased brightness (20mcd) and higher test current (20mA), suitable for applications requiring enhanced visibility.
The 323-2SYGD/S530-E2 (Everlight Electronics Co Ltd) provides a compact alternative (6.30mm height) with yellow-green wavelength (573nm) and wide 90° viewing angle, appropriate for applications prioritizing wide-angle visibility.
Not Recommended for New Designs:
The 4300H5LC (Visual Communications Company - VCC) carries "Not For New Designs" status and operates at significantly lower brightness (2.3mcd) and current (2mA), making it unsuitable for replacement in active production.
The HLMP-3680-B00B2 (Broadcom Limited) requires 5V forward voltage, incompatible with 2.4V circuit designs.
Frequently Asked Questions (FAQ)
Q: Can TLHG6420 directly replace TLHG6405 in existing circuits?
A: TLHG6420 operates at 2.1V forward voltage versus the original 2.4V, and requires 20mA test current versus 10mA. Circuit redesign may be necessary to accommodate these electrical differences. Verify your power supply and current-limiting resistor calculations before substitution.
Q: What is the difference between green and yellow-green LED substitutes?
A: Green LEDs (565-569nm) and yellow-green LEDs (573-575nm) occupy different regions of the visible spectrum. Yellow-green parts like 1383SYGD/S530-E2 and 323-2SYGD/S530-E2 produce a perceptibly different color. Select based on your application's color requirements and user interface design.
Q: Are all listed substitutes ROHS3 compliant?
A: Most substitutes carry explicit ROHS3 Compliant status. TLHG6420, 336SYGSYGD/S530-E2, and HLMP-3680-B00B2 do not specify RoHS status in the provided data. Verify compliance documentation with your supplier before procurement.
Q: How do brightness ratings affect substitution?
A: The TLHG6405 provides 15mcd brightness. Substitutes range from 1.6mcd to 200mcd. Lower brightness (4.2mcd HLMP-3507-D0001) suits low-visibility applications; higher brightness (140mcd 151051VS04000, 200mcd 1383SYGD/S530-E2) suits high-visibility requirements. Select based on your application's ambient lighting conditions and visibility requirements.
Q: What mounting considerations apply to these substitutes?
A: All listed substitutes are through-hole radial mount components with round domed-top lenses. Physical height varies from 6.30mm to 12.80mm. Verify PCB layout clearance and mechanical fit before final selection, particularly for compact designs.
Q: Can I use HLMP-3507-D00B2 as a direct replacement?
A: HLMP-3507-D00B2 is a right-angle through-hole variant with circuit board indicator housing. While electrically compatible (2.1V, 10mA, green, 565nm), its mechanical form factor differs from the standard radial TLHG6405. Use only if your PCB layout accommodates right-angle mounting.
Q: Which substitute offers the closest electrical match?
A: HLMP-3507-D0001 provides the closest electrical profile: 2.1V forward voltage, 10mA test current (matching the original), 569nm wavelength, and 60° viewing angle. This part minimizes circuit redesign requirements.
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