Equivalent & Substitute Parts for LN29RCPX

Part Overview

The LN29RCPX is a 4mm round through-hole red LED manufactured by Panasonic Electronic Components, designed for red LED indication applications. This part features a 2.2V forward voltage, 4.6mcd brightness rating, and a domed lens style with 700nm peak wavelength. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design requirements and component sourcing.

Substiute Parts

LN29RCPX

Panasonic Electronic ComponentsIn Stock: 887LN29RCPX Datasheet

Current PartRFQ

HLMP3300

onsemiIn Stock: 977HLMP3300 Datasheet

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SSL-LX4064HD

Lumex Opto/Components Inc.In Stock: 6071SSL-LX4064HD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LN29RCPX is determined by the following critical parameters:

• Color: Red LED indication
• Mounting Type: Through Hole radial configuration
• Voltage - Forward (Vf): 2.0V to 2.2V range
• Millicandela Rating: 4.6mcd to 5mcd range
• Wavelength - Peak: 700nm region (red spectrum)
• Lens Style: Round with domed top
• Package / Case: Radial through-hole

The identified substitute parts meet these core electrical and mechanical criteria, allowing direct functional replacement in applications requiring red LED indication with similar brightness and voltage characteristics.

Parameter Comparison

Engineering Selection Recommendations

SSL-LX4064HD is the primary substitute for new designs and ongoing production. This part maintains the 4.00mm lens diameter and 6.00mm maximum height, ensuring mechanical compatibility with existing PCB layouts. The SSL-LX4064HD is Active product status with RoHS3 compliance and REACH Unaffected certification, providing long-term availability and regulatory compliance. The 5mcd brightness rating exceeds the original specification, and the 2V forward voltage is within acceptable operating range for most circuit designs.

HLMP3300 serves as an alternative substitute where forward voltage matching at 2.2V is critical. This part is obsolete, limiting its suitability for new designs. The 5mm T-1 3/4 lens size and 8.89mm height represent mechanical differences requiring PCB layout verification. The 635nm peak wavelength differs from the original 700nm specification.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX4064HD directly replace LN29RCPX in existing designs? A: Yes, for most applications. Both parts share 4.00mm lens diameter, similar maximum heights (6.00mm vs 6.20mm), and compatible through-hole radial packages. The 2V forward voltage of SSL-LX4064HD is within acceptable tolerance for circuits designed for 2.2V operation. Verify circuit current limiting resistor values accommodate the 20mA test current specification.

Q: What is the significance of the wavelength difference between LN29RCPX (700nm) and HLMP3300 (635nm)? A: Peak wavelength indicates the dominant color perception. The LN29RCPX at 700nm produces a deeper red appearance, while HLMP3300 at 635nm produces a brighter, more orange-red appearance. Selection depends on visual indication requirements and human perception in the target application.

Q: Why is SSL-LX4064HD preferred over HLMP3300 for new designs? A: SSL-LX4064HD maintains Active product status, ensuring continued availability and manufacturing support. HLMP3300 is obsolete, presenting long-term sourcing risk. SSL-LX4064HD also provides RoHS3 compliance and REACH certification, meeting current regulatory requirements.

Q: Are there mechanical compatibility concerns with these substitutes? A: HLMP3300 has a larger 5mm lens and greater height (8.89mm), requiring PCB layout verification for clearance and visual alignment. SSL-LX4064HD maintains nearly identical mechanical dimensions to the original LN29RCPX, minimizing layout concerns.

Q: How do brightness ratings compare across these parts? A: LN29RCPX and HLMP3300 both specify 4.6mcd. SSL-LX4064HD provides 5mcd, delivering approximately 43% greater brightness. For applications requiring consistent brightness levels, this difference may require circuit adjustment or acceptance of increased visual intensity.