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LTL2H3SEK Equivalent & Substitute Parts
Part Overview
The LTL2H3SEK is a red 630nm LED indicator manufactured by Lite-On, configured as a T-1 3/4 through-hole radial component with 6350mcd brightness. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility with through-hole mounting, forward voltage tolerance, and optical characteristics within the red spectrum range.
Substiute Parts
Key Parameters
| Parameter | LTL2H3SEK Value |
|---|---|
| Color | Red |
| Wavelength - Dominant | 630nm |
| Wavelength - Peak | 639nm |
| Voltage - Forward (Vf) (Typ) | 2.25V |
| Current - Test | 20mA |
| Millicandela Rating | 6350mcd |
| Lens Size | 5mm, T-1 3/4 |
| Lens Style | Round with Domed Top |
| Lens Transparency | Clear |
| Viewing Angle | 15° |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Height (Max) | 8.70mm |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following criteria:
Primary Compatibility Requirements:
- Color: Red
- Mounting Type: Through Hole
- Package / Case: Radial
- Lens Style: Round with Domed Top
- Lens Transparency: Clear
- Current - Test: 20mA
Electrical Tolerance Parameters:
- Voltage - Forward (Vf): 1.9V to 2.25V acceptable range
- Wavelength - Dominant: 624nm to 630nm (red spectrum)
Optical Performance Parameters:
- Millicandela Rating: 2500mcd to 18150mcd (brightness variation acceptable based on application requirements)
- Viewing Angle: 6° to 23° (directional characteristics may vary)
Physical Compatibility:
- Lens Size: 5mm, T-1 3/4 or 5.00mm Dia
- Height (Max): 8.70mm to 8.91mm
Substitute parts meeting these criteria are functionally compatible with the LTL2H3SEK in standard LED indication applications.
Parameter Comparison
| Part Number | Manufacturer | Color | Wavelength - Dominant (nm) | Vf (Typ) (V) | Millicandela (mcd) | Viewing Angle (°) | Height Max (mm) | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| LTL2H3SEK | Lite-On | Red | 630 | 2.25 | 6350 | 15 | 8.70 | Obsolete | - |
| LTL2H3HRKL13 | Lite-On Inc. | Red | 625 | 2.2 | 12000 | 15 | 8.70 | Active | ROHS3 Compliant |
| 333-2SURC/H3/S400-A6 | Everlight Electronics Co Ltd | Red | 624 | 2.0 | 2500 | 15 | 8.90 | Active | ROHS3 Compliant |
| 383-2SDRC/S530-A4 | Everlight Electronics Co Ltd | Red | 639 | 2.0 | 2780 | 6 | 8.90 | Active | - |
| 383-2SURC/S530-A6 | Everlight Electronics Co Ltd | Red | 624 | 2.0 | 6300 | 6 | 8.90 | Active | - |
| C503B-ABN-CW0Z0251 | CreeLED, Inc. | Amber | 591 | 2.1 | 7500 | 23 | 13.30 | Active | RoHS Compliant |
| HLMP-EG08-VY000 | Broadcom Limited | Red | 626 | 1.9 | 8100 | 8 | 8.91 | Active | ROHS3 Compliant |
| HLMP-EG08-WZ000 | Broadcom Limited | Red | 626 | 1.9 | 10750 | 8 | 8.91 | Active | ROHS3 Compliant |
| HLMP-EG08-WZ0DD | Broadcom Limited | Red | 626 | 1.9 | 10750 | 8 | 8.91 | Active | ROHS3 Compliant |
| HLMP-EG08-X1000 | Broadcom Limited | Red | 626 | 1.9 | 14100 | 8 | 8.91 | Active | ROHS3 Compliant |
| HLMP-EG08-Y2000 | Broadcom Limited | Red | 626 | 1.9 | 18150 | 8 | 8.91 | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute (Manufacturer Match): LTL2H3HRKL13 from Lite-On Inc. is the recommended primary substitute. It maintains the same base product number (LTL2H3), identical lens size and height, and is actively produced with ROHS3 compliance. Forward voltage is within acceptable tolerance (2.2V vs. 2.25V), and brightness is increased to 12000mcd while maintaining the 15° viewing angle.
Secondary Substitutes (Broadcom HLMP-EG08 Series): The Broadcom HLMP-EG08 series (VY000, WZ000, WZ0DD, X1000, Y2000) are active production parts with ROHS3 compliance. These parts operate at lower forward voltage (1.9V) and feature narrower viewing angles (8°). Brightness ranges from 8100mcd to 18150mcd, accommodating various application requirements. Physical dimensions are compatible (8.91mm height vs. 8.70mm original).
Alternative Substitutes (Everlight Electronics): Everlight 333-2SURC/H3/S400-A6 and 383-2SURC/S530-A6 are active production alternatives with ROHS3 compliance. The 333-2SURC variant maintains 15° viewing angle and 8.90mm height. The 383-2SURC variant features 6° viewing angle and 6300mcd brightness. Both operate at 2.0V forward voltage.
Not Recommended: C503B-ABN-CW0Z0251 (CreeLED amber LED) is not suitable as a direct substitute due to different color (amber vs. red), different wavelength (591nm vs. 630nm), and incompatible height (13.30mm vs. 8.70mm).
Frequently Asked Questions (FAQ)
Q: Can I use HLMP-EG08-Y2000 as a direct replacement for LTL2H3SEK? A: Yes, with circuit design consideration. The HLMP-EG08-Y2000 is electrically and mechanically compatible. However, it operates at 1.9V forward voltage (vs. 2.25V) and features 8° viewing angle (vs. 15°). Current-limiting resistor values may require adjustment to account for the lower forward voltage and higher brightness (18150mcd vs. 6350mcd).
Q: What is the difference between HLMP-EG08-WZ000 and HLMP-EG08-WZ0DD? A: Both parts are electrically and optically identical (626nm, 1.9V, 10750mcd, 8° viewing angle, 8.91mm height). The difference is packaging: WZ000 is supplied in Bulk, while WZ0DD is supplied in Tape & Box (TB). Selection depends on assembly process requirements.
Q: Is LTL2H3HRKL13 a direct pin-compatible replacement? A: Yes. LTL2H3HRKL13 maintains identical physical dimensions (8.70mm height, 5mm T-1 3/4 lens), radial through-hole mounting, and forward voltage within tolerance (2.2V vs. 2.25V). It is the recommended substitute from the original manufacturer.
Q: Why is the Everlight 383-2SDRC/S530-A4 listed but not recommended as primary? A: While electrically compatible (red color, 2.0V forward voltage, through-hole radial mount), this part has a narrower 6° viewing angle compared to the original 15°, which may not suit all application requirements. It is suitable only for applications requiring narrow-angle indication.
Q: Can I use the amber LED C503B-ABN-CW0Z0251 as a substitute? A: No. This part is not compatible. It is amber (591nm wavelength), not red (630nm), operates at different voltage (2.1V), and has significantly different physical dimensions (13.30mm height vs. 8.70mm). It is unsuitable for direct substitution.
Q: What forward voltage tolerance should I design for when selecting a substitute? A: The LTL2H3SEK operates at 2.25V. Acceptable substitutes range from 1.9V to 2.2V. When designing current-limiting circuits, account for this voltage variation to maintain consistent brightness and component reliability.
Q: Are all listed substitutes RoHS compliant? A: Most active production substitutes are ROHS3 compliant. LTL2H3HRKL13, all Broadcom HLMP-EG08 variants, and Everlight 333-2SURC/H3/S400-A6 are ROHS3 compliant. Everlight 383-2SDRC/S530-A4 and 383-2SURC/S530-A6 do not list RoHS status in provided specifications.
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