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HLMP1790MP4BS Equivalent & Substitute Parts Reference
Part Overview
The HLMP1790MP4BS is a green circuit board indicator LED manufactured by Everlight Electronics Co Ltd, designed for through-hole mounting applications. This 3mm T-1 LED features a diffused, tinted lens with a domed top and operates at 2V with a 25mA rated current. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring green indication functionality.
Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative voltage or current specifications better match circuit requirements, or when different optical characteristics (brightness, viewing angle) are required for specific application needs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HLMP1790MP4BS |
| Manufacturer | Everlight Electronics Co Ltd |
| Color | Green |
| Lens Size | 3mm, T-1 |
| Lens Type | Diffused, Tinted |
| Lens Style | Round with Domed Top |
| Voltage Rating | 2V |
| Current | 25mA |
| Millicandela Rating | 2mcd |
| Wavelength - Peak | 585nm |
| Viewing Angle | 50° |
| Mounting Type | Through Hole |
| Configuration | Single |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution logic for the HLMP1790MP4BS is based on the following critical parameters that must align with circuit design requirements:
Primary Compatibility Criteria:
- Lens Size: 3mm, T-1 form factor (mechanical fit)
- Mounting Type: Through Hole (PCB assembly compatibility)
- Color: Green (optical function)
- Lens Type: Diffused, Tinted (optical appearance)
- Configuration: Single LED (functional requirement)
Secondary Selection Criteria:
- Voltage Rating: Forward voltage (Vf) determines series resistor sizing
- Current Rating: Operating current affects power dissipation and circuit design
- Millicandela Rating: Brightness level for visibility requirements
- Viewing Angle: Field of view for application-specific placement
- Wavelength: Peak wavelength for color consistency
Substitute parts are grouped into three categories based on voltage compatibility with the original 2V specification:
Category 1 - Low Voltage (1.9V to 2.1V): Direct voltage substitutes with minimal circuit redesign Category 2 - Medium Voltage (5V): Requires series resistor recalculation Category 3 - High Voltage (12V): Requires significant circuit redesign
Parameter Comparison
| Part Number | Manufacturer | Color | Lens Size | Voltage (Vf) | Current | mcd Rating | Wavelength (nm) | Viewing Angle | Mounting | Product Status | RoHS |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HLMP1790MP4BS | Everlight | Green | 3mm T-1 | 2V | 25mA | 2mcd | 585nm | 50° | Through Hole | Active | ROHS3 |
| 3GD-F | Bivar Inc. | Green | 3mm T-1 | 2.1V | 20mA | 25mcd | 568nm | 35° | Through Hole | Active | ROHS3 |
| HLMP-1640 | Broadcom | Green | 3mm T-1 | 5V | 10mA | 1.6mcd | 565nm | 60° | Through Hole | Active | ROHS3 |
| HLMP-1640-B00A1 | Broadcom | Green | 3mm T-1 | 5V | 10mA | 1.6mcd | 565nm | 120° | Through Hole, Right Angle | Active | ROHS3 |
| HLMP-1640-B00A2 | Broadcom | Green | 3mm T-1 | 5V | 10mA | 1.6mcd | 565nm | 60° | Through Hole, Right Angle | Active | ROHS3 |
| HLMP-1641 | Broadcom | Green | 3mm T-1 | 12V | 13mA | 1.6mcd | 565nm | 60° | Through Hole | Active | ROHS3 |
| HLMP-1790 | Broadcom | Green | 3mm T-1 | 1.9V | 2mA | 2.3mcd | 565nm | 50° | Through Hole | Active | ROHS3 |
| HLMP-1790-A0002 | Broadcom | Green | 3mm T-1 | 1.9V | 2mA | 2.3mcd | 565nm | 50° | Through Hole | Active | ROHS3 |
| LTL-4231 | Lite-On Inc. | Green | 3mm T-1 | 2.1V | 10mA | 12.6mcd | 565nm | 40° | Through Hole | Active | ROHS3 |
| SLI-343P8G3F | Rohm Semiconductor | Green | 3.10mm T-1 | 2.2V | 20mA | 22mcd | 560nm | 40° | Through Hole | Active | ROHS3 |
| SLR-332MG3F | Rohm Semiconductor | Green | 3.20mm T-1 | 2.1V | 10mA | 16mcd | 572nm | 85° | Through Hole | Active | ROHS3 |
Engineering Selection Recommendations
Direct Substitutes (Minimal Circuit Redesign):
The HLMP-1790 and HLMP-1790-A0002 from Broadcom Limited are direct substitutes for the HLMP1790MP4BS. Both parts operate at 1.9V forward voltage, which is within 0.1V of the original specification. The HLMP-1790-A0002 differs only in packaging format (Cut Tape versus Bulk). Both parts maintain the same 50° viewing angle and similar millicandela rating (2.3mcd versus 2mcd). All three parts are Active status and ROHS3 compliant.
The 3GD-F from Bivar Inc. and SLR-332MG3F from Rohm Semiconductor operate at 2.1V forward voltage, representing a 0.1V increase from the original specification. Both are Active status and ROHS3 compliant. The 3GD-F provides 25mcd brightness compared to the original 2mcd, while the SLR-332MG3F provides 16mcd with an extended 85° viewing angle.
Conditional Substitutes (Circuit Redesign Required):
The HLMP-1640, HLMP-1640-B00A1, and HLMP-1640-B00A2 from Broadcom Limited operate at 5V forward voltage, requiring series resistor recalculation. These parts are suitable only when the circuit power supply is 5V or higher. The right-angle variants (B00A1 and B00A2) provide alternative mounting orientations with different viewing angles (120° and 60° respectively).
The HLMP-1641 from Broadcom Limited operates at 12V forward voltage and is suitable only for 12V circuit applications. This part requires significant circuit redesign and is not recommended for 2V or 5V systems.
The LTL-4231 from Lite-On Inc. operates at 2.1V forward voltage with higher brightness (12.6mcd) and is Active status. REACH Status is listed as Affected, which may require additional compliance verification for specific applications.
The SLI-343P8G3F from Rohm Semiconductor operates at 2.2V forward voltage with 22mcd brightness. Lens size is specified as 3.10mm diameter, representing a minor dimensional variation from the standard 3mm T-1 specification.
Compliance Status:
All listed substitute parts are Active product status and ROHS3 compliant. MSL rating is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions. ECCN classification is EAR99 for all parts, and HTSUS code 8541.41.0000 applies uniformly across all substitutes.
Frequently Asked Questions (FAQ)
Q: Can I use HLMP-1640 as a direct replacement for HLMP1790MP4BS?
A: No. The HLMP-1640 operates at 5V forward voltage compared to the original 2V specification. Direct substitution would require recalculation of the series resistor value. The circuit power supply must be 5V or higher for this part to function correctly.
Q: What is the difference between HLMP-1790 and HLMP-1790-A0002?
A: Both parts are electrically identical with 1.9V forward voltage, 2mA test current, and 2.3mcd brightness. The difference is packaging format: HLMP-1790 is supplied in Bulk packaging, while HLMP-1790-A0002 is supplied in Cut Tape (CT) format. Selection depends on assembly process requirements.
Q: Which substitute provides the brightest indication?
A: The SLI-343P8G3F from Rohm Semiconductor provides 22mcd brightness, the highest among all listed substitutes. However, this part operates at 2.2V forward voltage and has a lens size of 3.10mm diameter, representing minor variations from the original specification.
Q: Are the right-angle variants (HLMP-1640-B00A1 and B00A2) mechanically compatible?
A: The right-angle variants feature different mounting orientation (Through Hole, Right Angle) compared to the original straight-through-hole design. Mechanical compatibility depends on PCB layout and component placement requirements. These parts are suitable only when right-angle mounting is required.
Q: What is the viewing angle difference between substitutes?
A: Viewing angles vary significantly among substitutes. The original HLMP1790MP4BS has 50° viewing angle. The SLR-332MG3F provides the widest viewing angle at 85°, while the 3GD-F provides the narrowest at 35°. Selection depends on application-specific visibility requirements and component placement on the PCB.
Q: Can I use LTL-4231 in a design requiring ROHS compliance?
A: Yes. The LTL-4231 is ROHS3 compliant. However, REACH Status is listed as Affected, which may require additional compliance verification depending on the end application and target market. Consult REACH substance documentation for specific application requirements.
Q: What is the wavelength difference between the original and substitutes?
A: The original HLMP1790MP4BS has a peak wavelength of 585nm. Most substitutes have peak wavelengths between 560nm and 572nm, representing minor color variations within the green spectrum. These variations are typically imperceptible to the human eye in circuit board indicator applications.
Q: Which substitute requires the least circuit modification?
A: The HLMP-1790 and HLMP-1790-A0002 from Broadcom Limited require minimal circuit modification. Both operate at 1.9V forward voltage, only 0.1V lower than the original 2V specification. Series resistor adjustment may be minimal or unnecessary depending on circuit tolerance specifications.
Q: Are all substitutes available in the same packaging quantities?
A: No. Inventory levels vary significantly. The HLMP-1790 has 24,307 pieces in stock, while the HLMP-1640-B00A1 has 4,405 pieces. Availability should be verified with the component supplier for production volume requirements.
Q: What is the maximum height difference among substitutes?
A: The HLMP-1640 and HLMP-1641 have maximum heights of 6.35mm, while the SLR-332MG3F has a maximum height of 4.60mm. The original specification does not provide height data. Height differences may affect PCB layout and component clearance considerations.
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