LN524YA Equivalent & Substitute Parts Reference

Part Overview

The Panasonic LN524YA is a 2-character 7-segment amber LED display module in 18-DIP packaging. This component is classified as obsolete, making equivalent or substitute parts necessary for new designs, maintenance applications, or inventory replenishment. The LN524YA features common anode configuration with 0.43-inch character height, amber color output, and operates at 2.2V forward voltage with 20mA test current.

Substiute Parts

LN524YA

Panasonic Electronic ComponentsIn Stock: 857LN524YA Datasheet

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LDD-A5003RI

Lumex Opto/Components Inc.In Stock: 1178LDD-A5003RI Datasheet

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LTP-3786E

Lite-On Inc.In Stock: 2517LTP-3786E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LN524YA is determined by the following critical parameters:

• Package Type: 18-DIP form factor is mandatory for direct pin-compatible replacement
• Character Configuration: 2-character display requirement
• Common Pin Type: Common anode configuration
• Electrical Compatibility: Forward voltage and current ratings must support existing circuit design
• Display Segment Type: 7-segment or alphanumeric capability (14-segment provides extended functionality)
• Physical Dimensions: Overall height, width, and depth must fit within design constraints
• Character Height: Affects visibility and panel layout compatibility

The identified substitute parts meet these criteria with variations in color, brightness, and segment capability that allow functional replacement in appropriate applications.

Parameter Comparison

Engineering Selection Recommendations

LDD-A5003RI (Lumex Opto/Components Inc.)

This substitute provides direct functional replacement for numeric 7-segment display applications. The LDD-A5003RI maintains 2-character, 7-segment, common anode configuration with 18-DIP packaging. Yellow color output (585nm wavelength) is spectrally adjacent to the original amber (590nm). Forward voltage is 2.1V, slightly lower than the LN524YA's 2.2V, reducing circuit power requirements. Test current is 10mA versus the original 20mA, resulting in lower power dissipation (105mW maximum). The LDD-A5003RI is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability.

LTP-3786E (Lite-On Inc.)

This substitute extends functionality beyond the original 7-segment display through 14-segment alphanumeric capability. The LTP-3786E maintains 2-character, common anode, 18-DIP configuration. Orange-red color output (630nm wavelength) differs from the original amber but provides distinct visual characteristics. Forward voltage is 2.0V, lower than the LN524YA's 2.2V. Test current matches the original at 20mA. The LTP-3786E is ROHS3 compliant with active product status. Selection of this substitute is appropriate when alphanumeric display capability is required or when the design can accommodate the larger character height (0.54" versus 0.43").

Both substitutes are active products with modern compliance certifications, addressing the obsolescence of the LN524YA while maintaining common anode pin configuration and 18-DIP package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LDD-A5003RI directly replace the LN524YA without circuit modification?

A: The LDD-A5003RI is pin-compatible as a 2-character, 7-segment, common anode, 18-DIP display. Forward voltage is 2.1V versus 2.2V, and test current is 10mA versus 20mA. Existing current-limiting resistor values may require adjustment to optimize brightness and power consumption. Verify that the circuit design accommodates the slightly lower forward voltage specification.

Q: What is the primary difference between the LDD-A5003RI and LTP-3786E substitutes?

A: The LDD-A5003RI is a 7-segment numeric display, functionally equivalent to the original LN524YA. The LTP-3786E is a 14-segment alphanumeric display, providing extended character capability. The LTP-3786E has a larger character height (0.54" versus 0.43"), which may affect panel layout and visibility. Select based on whether alphanumeric display capability is required.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the LDD-A5003RI and LTP-3786E are ROHS3 compliant. The original LN524YA is RoHS non-compliant. If RoHS compliance is a design requirement, either substitute part satisfies this criterion.

Q: How do the color outputs differ between the main part and substitutes?

A: The LN524YA produces amber output (590nm wavelength). The LDD-A5003RI produces yellow output (585nm wavelength), which is spectrally similar. The LTP-3786E produces orange-red output (630nm wavelength), which is visually distinct. Color selection depends on application requirements and user interface design.

Q: What is the impact of different current ratings on circuit design?

A: The LN524YA operates at 20mA test current. The LDD-A5003RI operates at 10mA, reducing power dissipation and allowing smaller current-limiting resistors. The LTP-3786E operates at 20mA, matching the original. Verify that the power supply and current-limiting resistor design can accommodate the selected substitute's current specification.

Q: Are the physical dimensions compatible with the original design?

A: All three parts use 18-DIP packaging. Character heights differ: LN524YA (0.43"), LDD-A5003RI (0.50"), and LTP-3786E (0.54"). Overall module dimensions vary slightly. Verify that the selected substitute fits within the available panel space and that character height changes do not affect visibility or user interface design.

Q: What is the product status significance for long-term supply?

A: The LN524YA is obsolete, indicating discontinued production and limited availability. Both the LDD-A5003RI and LTP-3786E are active products with ongoing manufacturing and supply chain support, ensuring availability for current and future production runs.