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SSL-LX3044HD Red Diffused T-1 LED Equivalent & Substitute Parts
Part Overview
The SSL-LX3044HD is a red diffused T-1 through-hole LED manufactured by Lumex Opto/Components Inc., designed for discrete red LED indication applications. This component features a 2V forward voltage, 6mcd brightness rating, and 60° viewing angle in a standard radial package configuration. The part is currently classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. Equivalent parts must maintain compatibility across electrical characteristics, mechanical dimensions, and mounting specifications while considering product status and regulatory compliance.
Substiute Parts
Key Parameters
| Parameter | SSL-LX3044HD Value | Substitution Relevance |
|---|---|---|
| Color | Red | Critical - Must match |
| Lens Transparency | Diffused | Critical - Must match |
| Lens Size | 3mm, T-1 | Critical - Must match |
| Voltage - Forward (Vf) (Typ) | 2V | Critical - Determines circuit compatibility |
| Current - Test | 20mA | Critical - Operating point reference |
| Mounting Type | Through Hole | Critical - Must match |
| Package / Case | Radial | Critical - Must match |
| Millicandela Rating | 6mcd | Important - Brightness level |
| Viewing Angle | 60° | Important - Optical performance |
| Wavelength - Peak | 700nm | Important - Color specification |
| Height (Max) | 4.60mm | Important - PCB clearance |
| RoHS Status | ROHS3 Compliant | Critical - Regulatory requirement |
Substitute Part Grouping Explanation
Substitute parts for the SSL-LX3044HD are categorized based on electrical and mechanical compatibility within the red diffused T-1 LED product category. The substitution logic is structured as follows:
Parametric Equivalent Category: Parts that maintain identical or near-identical electrical and mechanical specifications, allowing direct replacement with minimal circuit redesign consideration.
Similar Parts Category: Components that share the same form factor, mounting type, and general application but may vary in specific electrical parameters such as forward voltage, brightness rating, or viewing angle. These parts require circuit verification before implementation.
The following parameters determine substitution eligibility:
- Color (Red) and Lens Transparency (Diffused) must be identical
- Lens Size (3mm, T-1) and Mounting Type (Through Hole) must be identical
- Package configuration (Radial) must be identical
- Forward voltage (Vf) must be within acceptable circuit operating range
- RoHS3 compliance is mandatory for all substitutes
- Brightness rating and viewing angle variations are acceptable with application verification
Parameter Comparison
| Part Number | Manufacturer | Status | Vf (Typ) | mcd Rating | Viewing Angle | Peak Wavelength | Height (Max) | RoHS3 |
|---|---|---|---|---|---|---|---|---|
| SSL-LX3044HD | Lumex | Obsolete | 2V | 6mcd | 60° | 700nm | 4.60mm | Yes |
| SSL-LX305F4HD | Lumex | Active | 2V | 6mcd | 60° | 700nm | 5.00mm | Yes |
| 3HD-F | Bivar Inc. | Active | 2V | 30mcd | 35° | 625nm | 5.30mm | Yes |
| 3SRD-F | Bivar Inc. | Active | 1.7V | 40mcd | 35° | 645nm | 5.30mm | Yes |
| 3SRD-S | Bivar Inc. | Active | 1.7V | 40mcd | 40° | 645nm | 4.50mm | Yes |
| 3RD-F | Bivar Inc. | Active | 2.1V | 2mcd | 35° | 700nm | 5.30mm | Yes |
| 1254-10SURD/S530-A3 | Everlight Electronics | Active | 2V | 400mcd | 30° | 632nm | 5.30mm | Not specified |
| 4300F1LC | Visual Communications Company | Not For New Designs | 1.8V | 1.8mcd | 50° | 635nm | 6.35mm | Yes |
| HLMP-1301-G00FG | Broadcom Limited | Active | 1.9V | 8.6mcd | 60° | 635nm | 6.35mm | Yes |
| HLMP-1600 | Broadcom Limited | Active | 5V | 2.1mcd | 60° | 635nm | 6.35mm | Yes |
| HLMP-1600-D00A1 | Broadcom Limited | Active | 5V | 2.1mcd | 60° | 635nm | Not specified | Yes |
Engineering Selection Recommendations
Primary Recommendation - Parametric Equivalent:
The SSL-LX305F4HD (Lumex Opto/Components Inc.) is the direct parametric equivalent to the SSL-LX3044HD. Both components share identical electrical specifications (2V forward voltage, 6mcd brightness, 60° viewing angle, 700nm peak wavelength) and mechanical configuration (3mm T-1 diffused red lens, through-hole radial package). The SSL-LX305F4HD is currently in active production status with ROHS3 compliance. The maximum height difference (5.00mm vs. 4.60mm) represents a 0.40mm increase and must be verified for PCB clearance in space-constrained applications. This part is the preferred direct replacement for the obsolete SSL-LX3044HD.
Secondary Recommendations - Similar Parts with 2V Forward Voltage:
The 3HD-F (Bivar Inc.) and 3SRD-F (Bivar Inc.) are active alternatives with 2V and 1.7V forward voltages respectively. Both maintain the 3mm T-1 form factor and through-hole radial mounting. The 3HD-F operates at 2V with 30mcd brightness and 35° viewing angle. The 3SRD-F operates at 1.7V with 40mcd brightness and 35° viewing angle. These parts are suitable for applications where increased brightness is acceptable and viewing angle reduction is tolerable. The 3SRD-S variant provides a 4.50mm maximum height, matching the original SSL-LX3044HD height specification more closely.
Alternative Recommendations - Different Forward Voltage:
The HLMP-1301-G00FG (Broadcom Limited) operates at 1.9V with 8.6mcd brightness and maintains the 60° viewing angle of the original part. This component is active and ROHS3 compliant. The 3RD-F (Bivar Inc.) operates at 2.1V with 2mcd brightness, suitable for applications requiring lower brightness output.
Not Recommended for New Designs:
The 4300F1LC (Visual Communications Company) is classified as "Not For New Designs" and should not be selected for new product development despite ROHS3 compliance. The HLMP-1600 and HLMP-1600-D00A1 (Broadcom Limited) operate at 5V forward voltage, requiring significant circuit redesign and are suitable only for applications specifically designed for 5V LED operation.
Compliance Verification:
All recommended substitutes maintain ROHS3 compliance and REACH unaffected status consistent with the original SSL-LX3044HD. Moisture Sensitivity Level (MSL) 1 (Unlimited) is maintained across all recommended alternatives.
Frequently Asked Questions (FAQ)
Q: Can the SSL-LX305F4HD directly replace the SSL-LX3044HD without circuit modification?
A: The SSL-LX305F4HD is electrically and mechanically compatible with the SSL-LX3044HD. Both components operate at 2V forward voltage with identical brightness and viewing angle specifications. The 0.40mm height increase (5.00mm vs. 4.60mm) must be verified for PCB clearance. No circuit modification is required if clearance is confirmed.
Q: What is the primary difference between the Bivar 3HD-F and 3SRD-F alternatives?
A: The 3HD-F operates at 2V forward voltage with 30mcd brightness and 35° viewing angle. The 3SRD-F operates at 1.7V forward voltage with 40mcd brightness and 35° viewing angle. The 3SRD-F provides higher brightness at lower voltage. Both maintain the 3mm T-1 form factor and through-hole radial package. Circuit verification is required to confirm voltage compatibility.
Q: Why is the HLMP-1600 not recommended as a direct substitute?
A: The HLMP-1600 operates at 5V forward voltage compared to the SSL-LX3044HD's 2V specification. This voltage difference requires significant circuit redesign including resistor value recalculation and power supply considerations. This component is suitable only for applications specifically designed for 5V LED operation.
Q: Are all recommended substitutes RoHS3 compliant?
A: All recommended active substitutes maintain ROHS3 compliance consistent with the original SSL-LX3044HD. The 1254-10SURD/S530-A3 (Everlight Electronics) does not specify RoHS status in the provided data and should be verified with the manufacturer before selection.
Q: What is the significance of the "Not For New Designs" status for the 4300F1LC?
A: The 4300F1LC is classified as "Not For New Designs" by Visual Communications Company, indicating the manufacturer does not recommend this component for new product development. While the part remains available and ROHS3 compliant, selection should be limited to legacy product support or maintenance applications only.
Q: How do viewing angle differences affect component selection?
A: The SSL-LX3044HD specifies a 60° viewing angle. Substitutes with narrower viewing angles (35° or 40°) concentrate light output in a smaller cone, increasing brightness in the central viewing direction but reducing peripheral visibility. Applications requiring wide-angle indication should maintain the 60° specification. Applications with directional viewing requirements may accept narrower angles.
Q: What packaging format is available for the SSL-LX305F4HD?
A: The SSL-LX305F4HD is available in Bulk packaging. The original SSL-LX3044HD is also supplied in Bulk packaging. If tape and reel packaging is required, the 1254-10SURD/S530-A3 (Everlight Electronics) is available in Tape & Reel (TR) format, though this part has significantly different electrical characteristics (400mcd vs. 6mcd).
Q: Can the 3SRD-S be used in applications with height constraints?
A: The 3SRD-S provides a 4.50mm maximum height, which matches the original SSL-LX3044HD specification (4.60mm) more closely than most alternatives. This component operates at 1.7V forward voltage with 40mcd brightness and 40° viewing angle. Circuit verification is required to confirm voltage compatibility in the target application.
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