Panasonic LN513YK 7-Segment LED Display Equivalent & Substitute Parts

Part Overview

The Panasonic LN513YK is a single-character 7-segment LED display module with amber color output, designed for numeric and alphanumeric display applications. This component features a common cathode configuration with 0.30" character height and operates at 2.2V forward voltage with 20mA test current. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Substiute Parts

LN513YK

Panasonic Electronic ComponentsIn Stock: 675LN513YK Datasheet

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LDS-C303RI

Lumex Opto/Components Inc.In Stock: 1055LDS-C303RI Datasheet

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LDS-C304RI

Lumex Opto/Components Inc.In Stock: 1614LDS-C304RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LN513YK are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Display type: 7-Segment LED (single character)
• Common pin configuration: Common Cathode
• Package type: 14-DIP
• Character height: 0.30" nominal (7.62mm ±0.25mm tolerance acceptable)
• Operating voltage range: 2.0V to 2.2V forward voltage
• Current rating: 10mA to 20mA test current

Substitution Logic: The Lumex Opto/Components LDS-C303RI and LDS-C304RI meet the core electrical and mechanical compatibility requirements. Both parts share identical package configuration (14-DIP), common cathode topology, and compatible character dimensions (0.31" vs. 0.30" nominal). Forward voltage specifications (2.1V and 2.0V respectively) fall within acceptable operating ranges for common cathode 7-segment displays. Test current ratings (10mA) are lower than the original part but remain within standard design margins for LED display applications.

The primary difference between substitute options is color: LDS-C303RI provides yellow output (585nm wavelength), while LDS-C304RI provides red output (635nm wavelength). Color selection depends on application requirements and does not affect electrical compatibility or pinout.

Parameter Comparison

Engineering Selection Recommendations

LDS-C304RI (Primary Substitute): The LDS-C304RI is the recommended substitute for the obsolete LN513YK. This part maintains full electrical and mechanical compatibility through identical 14-DIP common cathode configuration and compatible operating voltage (2.0V vs. 2.2V). The part is currently in active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. Higher brightness rating (4.6mcd vs. 0.6mcd) provides improved visibility margin in display applications. Slightly increased physical dimensions (0.752" vs. 0.748" height) remain within standard PCB layout tolerances for 14-DIP packages.

LDS-C303RI (Alternative Substitute): The LDS-C303RI provides equivalent functionality with yellow color output (585nm wavelength) instead of red. This part is suitable for applications where amber or yellow display output is acceptable. ROHS3 compliance and active production status match the primary substitute. Forward voltage (2.1V) and brightness rating (2mcd) fall between the original part and the primary substitute, offering a middle-ground option for designs with specific color requirements.

Compliance Consideration: Both substitute parts carry ROHS3 compliance certification, addressing regulatory requirements that the obsolete LN513YK does not meet. This compliance status is significant for new designs or products requiring adherence to current environmental and material restriction standards.

Frequently Asked Questions (FAQ)

Q: Can the LDS-C304RI directly replace the LN513YK without circuit modifications?

A: Yes. Both parts share identical 14-DIP pinout configuration and common cathode topology. Forward voltage difference (2.0V vs. 2.2V) is within standard design margins for LED display circuits. No circuit modifications are required for direct substitution.

Q: What is the impact of the 0.01" character height difference (0.31" vs. 0.30")?

A: The 0.01" (0.25mm) difference is negligible for standard display applications and falls within typical PCB layout tolerances for 14-DIP packages. Visual appearance difference is imperceptible in most applications.

Q: How does the lower test current (10mA vs. 20mA) affect circuit design?

A: The 10mA rating indicates lower power consumption per segment. Existing circuits designed for 20mA operation will function correctly with 10mA-rated parts, as the lower current requirement provides additional design margin. No circuit redesign is necessary.

Q: Are the brightness differences (0.6mcd vs. 2mcd or 4.6mcd) significant?

A: The substitute parts provide higher brightness output. For applications requiring the original brightness level, series resistor values can be adjusted to reduce current and brightness to match original specifications. Higher brightness provides improved visibility in high-ambient-light environments.

Q: What is the significance of ROHS3 compliance on the substitute parts?

A: ROHS3 compliance indicates the parts meet current environmental and material restriction standards. This is essential for products sold in regulated markets and for long-term supply chain sustainability. The obsolete LN513YK does not carry this certification.

Q: Can I use LDS-C303RI (yellow) instead of LDS-C304RI (red) for the same application?

A: Color substitution depends on application requirements. Both parts are electrically and mechanically compatible. If the application specifies amber or red output, LDS-C304RI is the appropriate choice. If yellow output is acceptable, LDS-C303RI is a valid alternative with identical electrical performance.

Q: What are the lead count differences noted in the package specifications?

A: The substitute parts specify "10 Leads" within the 14-DIP package designation. This refers to the functional lead count for the 7-segment display (7 segments + 1 common cathode + 2 additional pins for mechanical support or future use). The 14-DIP package accommodates this configuration. Pinout compatibility remains unchanged.