LN350GP Green LED Equivalent & Substitute Parts

Part Overview

The LN350GP is a green diffused LED indicator manufactured by Panasonic Electronic Components, designed for through-hole mounting applications requiring discrete 2.2V forward voltage operation. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. The LN350GP operates at 20mA test current with a 2mcd brightness rating and 565nm peak wavelength, typical for standard green LED indication circuits.

Substiute Parts

LN350GP

Panasonic Electronic ComponentsIn Stock: 843LN350GP Datasheet

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WP503GDT

KingbrightIn Stock: 1002WP503GDT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LN350GP are identified based on strict electrical and mechanical compatibility criteria. The following parameters define acceptable substitution:

Electrical Compatibility:

• Forward voltage (Vf) must be 2.2V typical to maintain circuit design integrity
• Test current rating of 20mA ensures consistent operation within original design parameters
• Peak wavelength in the 565nm range confirms green spectrum compatibility

Mechanical Compatibility:

• Through-hole mounting type is mandatory for PCB integration
• Radial package configuration required for lead-based assembly
• Square lens style with flat top and 5.00mm lens size ensures physical fit and optical consistency
• Height constraints must accommodate existing PCB layouts

Optical Compatibility:

• Green color and diffused lens transparency are functional requirements
• Millicandela rating may vary within acceptable brightness ranges for indication applications

Parameter Comparison

Engineering Selection Recommendations

The WP503GDT from Kingbright qualifies as a direct substitute for the obsolete LN350GP based on matched electrical and mechanical parameters. Both components share identical forward voltage (2.2V), test current (20mA), peak wavelength (565nm), lens configuration (5.00mm square diffused), and through-hole radial mounting.

The WP503GDT offers two engineering advantages: active product status ensures long-term availability and supply chain continuity, and ROHS3 compliance aligns with current environmental and regulatory standards. The WP503GDT's 3mcd brightness rating exceeds the LN350GP's 2mcd specification, providing enhanced optical output suitable for indication applications. The reduced maximum height (7.20mm versus 9.20mm) accommodates tighter PCB layout constraints without functional compromise.

No design modifications are required for direct substitution. Existing circuit designs, PCB footprints, and current-limiting resistor calculations remain valid.

Frequently Asked Questions (FAQ)

Q: Can the WP503GDT replace the LN350GP in existing designs without PCB modification?

A: Yes. Both components share identical electrical specifications (2.2V forward voltage, 20mA test current) and mechanical form factors (5.00mm square diffused lens, through-hole radial package). Direct substitution requires no PCB layout changes or circuit redesign.

Q: Does the higher millicandela rating (3mcd vs. 2mcd) affect circuit operation?

A: No. The millicandela rating indicates optical output intensity. The WP503GDT's higher brightness is compatible with existing current-limiting resistor values and does not alter electrical performance. The circuit will operate identically, with enhanced visual indication.

Q: What is the significance of the height difference (7.20mm vs. 9.20mm)?

A: The WP503GDT's lower profile provides design flexibility for space-constrained applications. If the original design accommodates 9.20mm height, the 7.20mm substitute will fit without interference. This is a mechanical advantage with no electrical implications.

Q: Why is RoHS compliance important for this substitution?

A: The LN350GP is RoHS non-compliant, while the WP503GDT meets ROHS3 standards. For new production runs or designs subject to environmental regulations, the WP503GDT ensures regulatory compliance without functional compromise.

Q: Are there any wavelength differences between these components?

A: Both components specify 565nm peak wavelength, confirming identical green spectrum output. The WP503GDT adds a dominant wavelength specification (568nm), which falls within the green spectrum and is optically indistinguishable in indication applications.

Q: What is the viewing angle specification for the WP503GDT?

A: The WP503GDT specifies a 110° viewing angle. This parameter was not provided for the LN350GP. The 110° viewing angle is typical for diffused square LEDs and ensures adequate visibility across standard indication applications.