ASMT-AL31-NRS00 Equivalent & Substitute Parts

Part Overview

The ASMT-AL31-NRS00 is a blue 450nm LED in a 2-SMD, Gull Wing Exposed Pad package manufactured by Broadcom Limited. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part delivers 600mW luminous flux at 350mA test current with a forward voltage of 3.2V typical and a 140° viewing angle.

Substiute Parts

ASMT-AL31-NRS00

Broadcom LimitedIn Stock: 1093ASMT-AL31-NRS00 Datasheet

Current PartRFQ

ASM6-SLD2-NTV0H

Broadcom LimitedIn Stock: 800ASM6-SLD2-NTV0H Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASMT-AL31-NRS00 is based on the following critical parameters:

• Color and Wavelength: Both the main part and substitute must operate in the blue spectrum at 450nm (440nm ~ 460nm)
• Electrical Performance: Test current of 350mA, forward voltage compatibility, and maximum current ratings
• Luminous Flux Output: Optical output in the 600mW range at specified test conditions
• Mounting Type: Surface mount technology required
• Compliance: RoHS3 and REACH compliance maintained
• Thermal Characteristics: Package thermal resistance suitable for application requirements

The ASM6-SLD2-NTV0H meets these substitution criteria while offering an active product status and improved thermal performance through a smaller 3-SMD package footprint.

Parameter Comparison

Engineering Selection Recommendations

The ASM6-SLD2-NTV0H is the manufacturer-recommended substitute for the obsolete ASMT-AL31-NRS00. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part offers active product status, providing long-term availability and supply chain stability compared to the obsolete main part.

The ASM6-SLD2-NTV0H demonstrates superior thermal performance with a 3°C/W thermal resistance versus 10°C/W for the original part, and improved moisture sensitivity rating (MSL 1 versus MSL 2A). The substitute delivers higher luminous flux output at the same test current while operating at a lower forward voltage, resulting in reduced power consumption.

Package geometry differs significantly: the substitute uses a compact 3-SMD, No Lead configuration (3.45mm x 3.45mm x 2.10mm) compared to the larger 2-SMD Gull Wing Exposed Pad (8.00mm diameter x 4.20mm height). PCB layout and thermal management design modifications are required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the ASM6-SLD2-NTV0H directly replace the ASMT-AL31-NRS00 without circuit modifications?

A: No. While both parts operate at the same test current (350mA) and wavelength (450nm), the forward voltage differs (2.9V versus 3.2V). Current-limiting resistor values in the drive circuit must be recalculated. Additionally, the package footprint change from 2-SMD Gull Wing to 3-SMD No Lead requires PCB layout redesign.

Q: What are the key electrical differences between these parts?

A: The substitute operates at a lower forward voltage (2.9V vs 3.2V), supports higher maximum current (1A vs 700mA), and delivers greater luminous flux output (730mW vs 600mW) at the same 350mA test current. These characteristics result in improved efficiency and optical performance.

Q: Are there thermal management considerations for the substitute part?

A: Yes. The ASM6-SLD2-NTV0H has superior thermal resistance (3°C/W vs 10°C/W), indicating better heat dissipation capability. The smaller package footprint may require different thermal design considerations depending on application power levels.

Q: What is the impact of the viewing angle difference?

A: The substitute has a 130° viewing angle compared to 140° for the original part. This 10° reduction may affect light distribution in applications requiring wide-angle illumination. Optical design review is necessary for angle-critical applications.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the ASMT-AL31-NRS00 and ASM6-SLD2-NTV0H are ROHS3 compliant and REACH unaffected. The substitute offers improved moisture sensitivity (MSL 1 with unlimited shelf life versus MSL 2A with 4-week limitation), providing better handling flexibility.