MV53621 LED Yellow Clear T-1 T/H Equivalent & Substitute Parts

Part Overview

The MV53621 is a yellow LED indication component manufactured by onsemi, featuring a 3mm T-1 through-hole radial package with clear lens transparency. This part operates at 2.1V forward voltage with a 4mcd millicandela rating and 45° viewing angle. The MV53621 carries an obsolete product status, making equivalent and substitute parts necessary for ongoing production and maintenance applications requiring yellow LED indication in T-1 form factor.

Substiute Parts

MV53621

onsemiIn Stock: 861MV53621 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MV53621 is determined by the following critical parameters:

Primary Substitution Criteria:

• Color: Yellow
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Package / Case: Radial (T-1 form factor)
• Lens Size: 3mm T-1 compatible

Secondary Compatibility Parameters:

• Voltage - Forward (Vf): Operating range 1.9V to 2.2V
• Current - Test: 10mA to 20mA
• Viewing Angle: 40° to 45°
• Wavelength - Peak: 585nm to 590nm (yellow spectrum)

Substitute parts are grouped based on matching the primary criteria while maintaining electrical compatibility within the secondary parameter ranges. Parts with differing lens transparency (diffused vs. clear) or color (orange vs. yellow) are excluded from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SLI-343Y8C3F

The SLI-343Y8C3F is an active product from Rohm Semiconductor's EXCELED™ series with ROHS3 compliance. This part matches the MV53621 in color (yellow), lens transparency (clear), and T-1 form factor. The forward voltage of 2.2V is within acceptable operating range of the original 2.1V specification. The higher millicandela rating (680mcd vs. 4mcd) and increased test current (20mA vs. 10mA) provide enhanced brightness for indication applications. Height reduction from 6.30mm to 5.60mm may require PCB layout verification in space-constrained designs.

Secondary Recommendation: SLI-343YCT32

The SLI-343YCT32 is an active product supplied in Tape & Box packaging format. This part maintains yellow color and clear lens transparency with T-1 radial configuration. Forward voltage of 1.9V and test current of 20mA differ from the original specification but remain within acceptable substitution parameters. The 350mcd rating and 40° viewing angle represent a moderate brightness increase suitable for standard indication applications.

Alternative for Existing Inventory: SLI-343YC3F

The SLI-343YC3F carries a "Not For New Designs" status but remains available in inventory. This part is electrically compatible with the MV53621 and maintains identical color, lens transparency, and T-1 form factor. Use this part only for maintenance and repair of existing systems where design changes are not feasible.

Frequently Asked Questions (FAQ)

Q: Can SLI-343Y8C3F directly replace MV53621 without circuit modification?

A: The SLI-343Y8C3F is mechanically and electrically compatible as a direct replacement. The forward voltage difference (2.2V vs. 2.1V) is within normal LED tolerance ranges. However, the increased test current specification (20mA vs. 10mA) and higher brightness output (680mcd vs. 4mcd) may require current-limiting resistor adjustment in the circuit to maintain desired brightness levels and prevent premature LED failure.

Q: What is the significance of the "Not For New Designs" product status?

A: Parts marked "Not For New Designs" are in mature or declining production phases. While electrically and mechanically functional, these parts may have limited future availability and extended lead times. For new product development, select parts with "Active" status such as SLI-343Y8C3F or SLI-343YCT32 to ensure long-term supply chain stability.

Q: Are there mechanical compatibility concerns between MV53621 and substitute parts?

A: All substitute parts use identical T-1 radial through-hole mounting and 3mm lens size. The MV53621 has a maximum height of 6.30mm, while substitute parts measure 5.60mm maximum. This 0.70mm reduction may affect PCB layout in applications with tight vertical clearance constraints. Verify mechanical fit in your specific application before production implementation.

Q: What is the difference between clear and diffused lens transparency?

A: Clear lens transparency provides focused light output with defined viewing angle and higher brightness concentration. Diffused lens transparency scatters light across a wider area with reduced peak brightness. The MV53621 and recommended substitutes use clear lenses. Diffused alternatives (SLI-343YY3F) are not direct substitutes and should only be selected if diffused light output is specifically required.

Q: How do wavelength specifications affect substitution?

A: The MV53621 operates at 585nm peak wavelength (yellow spectrum). Substitute parts operate at 587nm to 590nm, all within the yellow spectrum range. These wavelength variations are imperceptible to human vision and do not affect functional compatibility in indication applications. Color matching remains consistent across all recommended substitutes.

Q: What packaging formats are available for substitute parts?

A: SLI-343YCT32 is supplied in Tape & Box format suitable for automated assembly. SLI-343YC3F and SLI-343Y8C3F are supplied in Bulk packaging. Select packaging format based on your assembly process requirements and volume needs.