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SLR-342MG3F Equivalent & Substitute Parts
Part Overview
The SLR-342MG3F is a green diffused T-1 through-hole LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 572nm and forward voltage of 2.1V at 10mA test current. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, and design transitions to active alternatives.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SLR-342MG3F |
| Manufacturer | Rohm Semiconductor |
| Color | Green |
| Lens Transparency | Diffused |
| Wavelength - Dominant | 572nm |
| Voltage - Forward (Vf) Typical | 2.1V |
| Current - Test | 10mA |
| Millicandela Rating | 16mcd |
| Lens Size | 3.10mm Dia |
| Viewing Angle | 40° |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Supplier Device Package | T-1 |
| Height (Max) | 5.40mm |
| RoHS Status | ROHS3 Compliant |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution of the SLR-342MG3F is determined by the following critical parameters:
- Color and Wavelength: Green indication with dominant wavelength at 572nm
- Lens Transparency: Diffused lens for uniform light distribution
- Electrical Characteristics: Forward voltage of 2.1V and test current of 10mA
- Mechanical Compatibility: T-1 through-hole radial package with 3mm lens diameter
- Optical Performance: 16mcd brightness rating with 40° viewing angle
- Compliance: ROHS3 compliance and unlimited moisture sensitivity level
Substitute parts are categorized as follows:
Direct Parametric Equivalent: SLR-343MG3F matches all critical parameters including wavelength, lens transparency, forward voltage, and test current, with identical mechanical form factor and compliance certifications.
Direct Manufacturer Equivalent: SLR-343MCT32 shares the same manufacturer (Rohm Semiconductor), forward voltage, and mounting type but differs in lens transparency (clear vs. diffused) and brightness rating (25mcd vs. 16mcd).
Similar Cross-Manufacturer Alternatives: Parts from Würth Elektronik, Everlight Electronics, Bivar Inc., and Broadcom Limited provide functional green LED indication with comparable electrical and mechanical characteristics, though with variations in specific parameters such as wavelength, brightness, viewing angle, and test current.
Parameter Comparison
| Parameter | SLR-342MG3F (Main) | SLR-343MG3F (Direct Equivalent) | SLR-343MCT32 (Direct Manufacturer) | 151031VS06000 (Würth) | 264-7SYGD/S530-E2 (Everlight) | 3GDL-F (Bivar) | HLMP-1503-D00FG (Broadcom) |
|---|---|---|---|---|---|---|---|
| Color | Green | Green | Green | Green | Yellow-Green | Green | Green |
| Lens Transparency | Diffused | Diffused | Clear | Diffused | Diffused | Diffused | Diffused |
| Wavelength - Dominant (nm) | 572 | 572 | — | 568 | 573 | — | 569 |
| Voltage - Forward (Vf) Typical (V) | 2.1 | 2.1 | 2.1 | 2.2 | 2.0 | 2.1 | 2.1 |
| Current - Test (mA) | 10 | 10 | 10 | 20 | 20 | 2 | 10 |
| Millicandela Rating (mcd) | 16 | 16 | 25 | 30 | 50 | 4 | 4.2 |
| Lens Size (mm Dia) | 3.10 | 3.10 | 3.10 | 3.00 | 2.90 | 3.00 | 3.00 |
| Viewing Angle (°) | 40 | 40 | 40 | 60 | 60 | 35 | 60 |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | Radial | Radial | Radial | Radial | Radial | Radial | Radial |
| Supplier Device Package | T-1 | T-1 | T-1 | 3mm Round | — | T-1 | T-1 |
| Height (Max) (mm) | 5.40 | 5.60 | 5.60 | 5.55 | 6.20 | 5.30 | 6.35 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Not For New Designs | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
For Direct Replacement (Preferred)
SLR-343MG3F is the optimal substitute, offering identical electrical and optical parameters to the SLR-342MG3F while maintaining active product status. Both parts share the same manufacturer, forward voltage (2.1V), test current (10mA), dominant wavelength (572nm), millicandela rating (16mcd), lens transparency (diffused), and mechanical form factor (T-1 radial package). This part is ROHS3 compliant and carries unlimited moisture sensitivity rating, matching the original specification exactly.
For Manufacturer Continuity
SLR-343MCT32 provides an alternative from Rohm Semiconductor with identical electrical characteristics (2.1V forward voltage, 10mA test current) and mechanical compatibility. The primary difference is clear lens transparency versus diffused, resulting in higher brightness (25mcd vs. 16mcd). This part is suitable where increased luminous intensity is acceptable and lens clarity is preferred. Packaging is cut tape rather than bulk.
For Cross-Manufacturer Substitution
Alternative suppliers offer functional green LED indication with comparable through-hole radial packages. Selection depends on specific application requirements:
-
151031VS06000 (Würth Elektronik): Higher brightness (30mcd) and wider viewing angle (60°) with slightly elevated forward voltage (2.2V) and test current (20mA). Suitable for applications requiring increased visibility.
-
3GDL-F (Bivar Inc.): Lower brightness (4mcd) and reduced test current (2mA), appropriate for low-power indication applications.
-
HLMP-1503-D00FG (Broadcom Limited): Comparable brightness (4.2mcd) with wider viewing angle (60°) and identical forward voltage (2.1V) at 10mA test current.
All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating.
Frequently Asked Questions (FAQ)
Q: Can SLR-343MG3F directly replace SLR-342MG3F without circuit modification?
A: Yes. SLR-343MG3F is a direct parametric equivalent with identical forward voltage (2.1V), test current (10mA), wavelength (572nm), and mechanical form factor. No circuit changes are required.
Q: What is the primary difference between SLR-343MG3F and SLR-343MCT32?
A: Both are from Rohm Semiconductor with identical electrical characteristics. The difference is lens transparency: SLR-343MG3F has a diffused lens (16mcd), while SLR-343MCT32 has a clear lens (25mcd). Packaging also differs: SLR-343MG3F is bulk, SLR-343MCT32 is cut tape.
Q: Are cross-manufacturer alternatives electrically compatible?
A: Cross-manufacturer parts share the same green color, through-hole radial package, and similar forward voltage range (2.0V to 2.2V). However, they vary in brightness, viewing angle, and test current. Verify that your circuit can accommodate these variations before substitution.
Q: Why does the SLR-342MG3F have "Not For New Designs" status?
A: This indicates the part has reached end-of-life. SLR-343MG3F is the recommended active alternative from the same manufacturer with identical specifications.
Q: What is the significance of the T-1 package designation?
A: T-1 refers to a standard through-hole LED package with 3mm lens diameter and radial leads. All listed substitutes maintain this form factor, ensuring mechanical compatibility with existing PCB layouts.
Q: Can I use HLMP-1640 as a substitute?
A: HLMP-1640 operates at 5V forward voltage, not 2.1V. It is not electrically compatible with circuits designed for the SLR-342MG3F without significant circuit redesign.
Q: What compliance certifications apply to all listed substitutes?
A: All parts listed are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). REACH status is unaffected for all parts except 264-7SYGD/S530-E2, where REACH status is not specified.
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