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TLHR4407 Red Diffused T-1 LED Equivalent & Substitute Parts
Part Overview
The TLHR4407 is a red diffused T-1 through-hole LED manufactured by Vishay Semiconductor Opto Division, designed for LED indication applications with a 619nm dominant wavelength and 8mcd brightness rating. This part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The TLHR4407 operates at 2V forward voltage with a 10mA test current and features a 60° viewing angle in a standard radial package configuration.
Substiute Parts
Key Parameters
| Parameter | TLHR4407 Value |
|---|---|
| Color | Red |
| Lens Transparency | Diffused |
| Lens Size | 3mm, T-1 |
| Lens Style | Round with Domed Top |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Voltage - Forward (Vf) (Typ) | 2V |
| Current - Test | 10mA |
| Millicandela Rating | 8mcd |
| Viewing Angle | 60° |
| Wavelength - Dominant | 619nm |
| Wavelength - Peak | 635nm |
| Height (Max) | 6.10mm |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the TLHR4407 is determined by strict alignment of the following electrical and mechanical parameters:
Primary Substitution Criteria:
- Color: Red
- Lens Transparency: Diffused
- Lens Size: 3mm, T-1
- Mounting Type: Through Hole
- Package / Case: Radial
- Voltage - Forward (Vf): 2V nominal
- Current - Test: 10mA nominal
- Viewing Angle: 60°
Secondary Compatibility Factors:
- Wavelength range: 619nm to 635nm dominant/peak
- Height compatibility: Maximum 6.35mm
- RoHS3 compliance required for new designs
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents (Vf = 2V, 10mA test current): Parts maintaining identical forward voltage and test current specifications with matching optical characteristics.
Category B - Functional Equivalents (Alternative voltage ratings): Parts with different forward voltage or test current specifications that may require circuit redesign but maintain identical physical form factor and optical properties.
Parameter Comparison
| Part Number | Manufacturer | Vf (Typ) | Current - Test | Millicandela | Viewing Angle | Wavelength - Peak | Height (Max) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| TLHR4407 | Vishay Semiconductor Opto Division | 2V | 10mA | 8mcd | 60° | 635nm | 6.10mm | Obsolete | ROHS3 Compliant |
| TLHR4405 | Vishay Semiconductor Opto Division | 2V | 10mA | 15mcd | 60° | 635nm | 6.10mm | Active | ROHS3 Compliant |
| 1254-10SURD/S530-A3 | Everlight Electronics Co Ltd | 2V | 20mA | 400mcd | 30° | 632nm | 5.30mm | Active | Not specified |
| 3HD-F | Bivar Inc. | 2V | 20mA | 30mcd | 35° | 625nm | 5.30mm | Active | ROHS3 Compliant |
| 4300F1LC | Visual Communications Company - VCC | 1.8V | 2mA | 1.8mcd | 50° | 635nm | 6.35mm | Not For New Designs | ROHS3 Compliant |
| HLMP-1301-G00FG | Broadcom Limited | 1.9V | 10mA | 8.6mcd | 60° | 635nm | 6.35mm | Active | ROHS3 Compliant |
| HLMP-1600 | Broadcom Limited | 5V | 10mA | 2.1mcd | 60° | 635nm | 6.35mm | Active | ROHS3 Compliant |
| HLMP-1600-D00A1 | Broadcom Limited | 5V | 10mA | 2.1mcd | 60° | 635nm | Not specified | Active | ROHS3 Compliant |
| HLMP-1600-D00A2 | Broadcom Limited | 5V | 10mA | 2.1mcd | 60° | 635nm | Not specified | Active | ROHS3 Compliant |
| HLMP-1601 | Broadcom Limited | 12V | 13mA | 2.1mcd | 60° | 635nm | 6.35mm | Active | ROHS3 Compliant |
| HLMP-1700 | Broadcom Limited | 1.7V | 2mA | 2.1mcd | 50° | 635nm | 6.35mm | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Recommended Primary Substitute: TLHR4405
The TLHR4405 from Vishay Semiconductor Opto Division is the most direct substitute for the TLHR4407. Both parts share identical electrical specifications (2V forward voltage, 10mA test current), physical form factor (3mm T-1 radial through-hole), and optical properties (60° viewing angle, 635nm peak wavelength). The TLHR4405 is currently in active production status with ROHS3 compliance, making it suitable for new designs and ongoing production. The only difference is increased brightness (15mcd versus 8mcd), which is compatible with applications designed for the original part.
Secondary Substitute: HLMP-1301-G00FG
The HLMP-1301-G00FG from Broadcom Limited provides near-equivalent performance with minimal circuit redesign. Forward voltage is 1.9V (0.1V lower than TLHR4407), and test current remains 10mA. Brightness is 8.6mcd, matching the original specification within tolerance. This part is active in production and ROHS3 compliant. The slightly lower forward voltage may require minor resistor adjustment in series-limiting circuits.
Alternative Substitutes for Specific Applications:
The 3HD-F from Bivar Inc. operates at 2V with 20mA test current and 30mcd brightness, suitable for applications requiring higher brightness with circuit modification. The HLMP-1600 series from Broadcom operates at 5V and requires significant circuit redesign but offers active production status and full compliance. The HLMP-1700 from Broadcom operates at 1.7V with 2mA test current and is suitable only for low-power applications.
Parts marked "Not For New Designs" (4300F1LC) should not be selected for new product development.
Frequently Asked Questions (FAQ)
Q: Can TLHR4405 directly replace TLHR4407 without circuit modification?
A: Yes. The TLHR4405 maintains identical forward voltage (2V) and test current (10mA) specifications. The increased brightness (15mcd versus 8mcd) is compatible with existing circuits. No component changes are required.
Q: What is the difference between Category A and Category B substitutes?
A: Category A substitutes (TLHR4405, HLMP-1301-G00FG) maintain the 2V forward voltage specification of the original TLHR4407, requiring no circuit redesign. Category B substitutes (HLMP-1600, HLMP-1601, HLMP-1700) operate at different voltages (5V, 12V, or 1.7V) and require circuit modification including resistor value changes.
Q: Are all substitute parts RoHS3 compliant?
A: All recommended substitutes are ROHS3 compliant. The 1254-10SURD/S530-A3 from Everlight does not specify RoHS status in the provided data and should be verified before use in regulated applications.
Q: What is the significance of the 60° viewing angle specification?
A: The 60° viewing angle defines the cone of light emission. Substitutes maintaining this specification (TLHR4405, HLMP-1301-G00FG, HLMP-1600 series, HLMP-1601) are optically equivalent. Parts with different viewing angles (3HD-F at 35°, HLMP-1700 at 50°) have narrower light distribution and may not be suitable for applications requiring wide-angle visibility.
Q: Can I use HLMP-1700 as a substitute?
A: The HLMP-1700 operates at 1.7V with 2mA test current, significantly different from the TLHR4407 (2V, 10mA). This part is suitable only for low-power applications and requires substantial circuit redesign. It is not recommended as a general substitute.
Q: What packaging options are available for substitutes?
A: All substitute parts listed maintain the through-hole radial package configuration of the original TLHR4407. The HLMP-1600-D00A1 and HLMP-1600-D00A2 variants feature right-angle mounting for circuit board indicator applications, differing from the standard radial orientation.
Q: Should I consider the Everlight 1254-10SURD/S530-A3 part?
A: The Everlight part operates at 2V with 20mA test current and offers significantly higher brightness (400mcd). However, it features a narrower 30° viewing angle and different height (5.30mm). This part requires circuit modification and is suitable only for applications requiring high brightness with narrow beam angle.
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