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SLR-343DUT32 Orange LED Equivalent & Substitute Parts
Part Overview
The SLR-343DUT32 is an orange diffused T-1 through-hole LED manufactured by Rohm Semiconductor, designed for indication applications with a dominant wavelength of 605nm. This active product features a 2V forward voltage, 16mcd brightness rating, and 40° viewing angle in a radial package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).
Substitute parts are necessary when the original SLR-343DUT32 becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from qualified alternatives meeting equivalent electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | SLR-343DUT32 |
|---|---|
| Manufacturer | Rohm Semiconductor |
| Color | Orange |
| Wavelength - Dominant (nm) | 605 |
| Voltage - Forward (Vf) Typ (V) | 2 |
| Current - Test (mA) | 10 |
| Millicandela Rating (mcd) | 16 |
| Lens Size (mm Dia) | 3.10 |
| Lens Transparency | Diffused |
| Viewing Angle (°) | 40 |
| Mounting Type | Through Hole |
| Package / Case | Radial |
| Height Max (mm) | 5.60 |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the SLR-343DUT32 are identified based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Mounting Type: Through Hole (radial configuration)
- Lens Transparency: Diffused
- Lens Style: Round with Domed Top
- Package / Case: Radial (T-1 or 3mm equivalent)
- RoHS Status: ROHS3 Compliant
- Product Status: Active
Secondary Electrical Parameters:
- Voltage - Forward (Vf): 2V nominal (tolerance range 1.8V–2.1V acceptable)
- Current - Test: 10mA–20mA range
- Millicandela Rating: 2.1mcd–30mcd range
- Viewing Angle: 40°–80° range
The substitute parts listed are yellow-colored LEDs (585nm–590nm wavelength) rather than orange (605nm). This represents a color shift in the visible spectrum. Selection of yellow substitutes is permissible only when application requirements allow wavelength variation within the yellow spectrum and do not mandate orange-specific indication.
Parameter Comparison
| Part Number | Manufacturer | Color | Wavelength (nm) | Vf Typ (V) | Test Current (mA) | mcd Rating | Lens Size (mm) | Viewing Angle (°) | Height Max (mm) | Packaging | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SLR-343DUT32 | Rohm Semiconductor | Orange | 605 | 2.0 | 10 | 16 | 3.10 | 40 | 5.60 | Tape & Box | ROHS3 |
| 151031YS05900 | Würth Elektronik | Yellow | 590 | 2.1 | 20 | 30 | 3.00 | 60 | 5.55 | Bulk | ROHS3 |
| HLMP-1620 | Broadcom Limited | Yellow | 585 | 5.0 | 10 | 2.2 | 3.00 | 60 | 6.35 | Bulk | ROHS3 |
| HLMP-1621 | Broadcom Limited | Yellow | 585 | 12.0 | 13 | 2.2 | 3.00 | 60 | 6.35 | Bulk | ROHS3 |
| HLMP-1719 | Broadcom Limited | Yellow | 585 | 1.8 | 2 | 2.1 | 3.00 | 50 | 6.35 | Bulk | ROHS3 |
| HLMP-1719-A0002 | Broadcom Limited | Yellow | 585 | 1.8 | 2 | 2.1 | 3.00 | 50 | 6.35 | Cut Tape | ROHS3 |
| SSL-LX3044LYD | Lumex Opto/Components Inc. | Yellow | 585 | 2.1 | 20 | 30 | 3.00 | 60 | 4.60 | Bulk | ROHS3 |
| SSL-LX3044YD | Lumex Opto/Components Inc. | Yellow | 585 | 2.1 | 20 | 15 | 3.00 | 40 | 4.60 | Bulk | ROHS3 |
| SSL-LX3044YD-12V | Lumex Opto/Components Inc. | Yellow | 585 | 12.0 | — | 6 | 3.00 | 60 | 4.60 | Bulk | ROHS3 |
| SSL-LX3044YD-5V | Lumex Opto/Components Inc. | Yellow | 585 | 5.0 | — | 6 | 3.00 | 60 | 4.60 | Bulk | ROHS3 |
| SSL-LX3052YD | Lumex Opto/Components Inc. | Yellow | 585 | 2.1 | 20 | 15 | 3.00 | 80 | 5.25 | Bulk | ROHS3 |
Engineering Selection Recommendations
All listed substitute parts carry Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the SLR-343DUT32.
Closest Electrical Match (2V Forward Voltage Class): SSL-LX3044YD and SSL-LX3044LYD from Lumex Opto/Components Inc. operate at 2.1V forward voltage with 20mA test current, matching the SLR-343DUT32 electrical operating point. SSL-LX3044YD provides 15mcd brightness at 40° viewing angle, directly comparable to the original 16mcd at 40°. SSL-LX3044LYD provides 30mcd at 60° viewing angle for applications requiring higher brightness or wider field of view.
Alternative Voltage Classes: Parts with differing forward voltages (HLMP-1620 at 5V, HLMP-1621 at 12V, HLMP-1719 at 1.8V, SSL-LX3044YD-5V at 5V, SSL-LX3044YD-12V at 12V) are selectable only when circuit design accommodates the specified voltage and current requirements.
Packaging Consideration: The original SLR-343DUT32 is supplied in Tape & Box packaging. Substitute parts are available in Bulk or Cut Tape formats. HLMP-1719-A0002 is available in Cut Tape packaging for automated assembly compatibility.
Brightness and Viewing Angle Trade-offs: 151031YS05900 (Würth Elektronik) and SSL-LX3044LYD provide 30mcd brightness with 60° viewing angle, suitable for applications requiring enhanced visibility. SSL-LX3052YD provides 80° viewing angle for wide-angle indication requirements.
Frequently Asked Questions (FAQ)
Q: Can yellow LEDs substitute for the orange SLR-343DUT32?
A: Yellow LEDs (585nm–590nm wavelength) represent a shift from orange (605nm) in the visible spectrum. Substitution is permissible only when application requirements do not mandate orange-specific indication. Visual appearance will differ noticeably. Verify application acceptance of yellow color before selection.
Q: Which substitute provides the closest electrical match?
A: SSL-LX3044YD and SSL-LX3044LYD operate at 2.1V forward voltage with 20mA test current, matching the SLR-343DUT32 electrical operating point. SSL-LX3044YD provides equivalent 15mcd brightness at 40° viewing angle.
Q: What is the difference between SSL-LX3044YD and SSL-LX3044LYD?
A: Both operate at 2.1V and 20mA test current. SSL-LX3044YD provides 15mcd at 40° viewing angle. SSL-LX3044LYD provides 30mcd at 60° viewing angle. Selection depends on brightness and viewing angle requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting regulatory requirements equivalent to the SLR-343DUT32.
Q: What packaging formats are available for substitutes?
A: Substitute parts are supplied in Bulk or Cut Tape packaging. The original SLR-343DUT32 is supplied in Tape & Box format. HLMP-1719-A0002 is available in Cut Tape for automated assembly processes.
Q: Can I use HLMP-1620 or HLMP-1621 as direct replacements?
A: HLMP-1620 (5V) and HLMP-1621 (12V) operate at significantly higher forward voltages than the SLR-343DUT32 (2V). These parts are selectable only when circuit design accommodates 5V or 12V operation respectively. They are not pin-compatible electrical replacements for 2V applications.
Q: What is the height difference between the SLR-343DUT32 and substitute parts?
A: SLR-343DUT32 maximum height is 5.60mm. Lumex parts (SSL-LX3044 series and SSL-LX3052YD) are shorter at 4.60mm–5.25mm. Broadcom HLMP parts are taller at 6.35mm. Verify PCB layout clearance before selection.
Q: Which substitute offers the widest viewing angle?
A: SSL-LX3052YD provides 80° viewing angle, compared to the SLR-343DUT32 at 40°. This part is suitable for applications requiring wide-angle indication visibility.
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