LB-303VA 7-Segment Display - Equivalent & Substitute Parts

Part Overview

The LB-303VA is a 3-character red 7-segment LED display module manufactured by Rohm Semiconductor, designed for numeric and alphanumeric display applications. This component features a common anode configuration with 0.31" character height and operates at 2V forward voltage with 10mA test current. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations where this display type is required.

Substiute Parts

LB-303VA

Rohm SemiconductorIn Stock: 1044LB-303VA Datasheet

Current PartRFQ

ELT-316SURWA/S530-A3

Everlight Electronics Co LtdIn Stock: 877ELT-316SURWA/S530-A3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the LB-303VA is determined by the following critical parameters:

• Display Configuration: 3-character, 7-segment, common anode architecture
• Electrical Characteristics: 2V forward voltage and 12-DIP package compatibility
• Color Specification: Red wavelength (650nm nominal)
• Regulatory Compliance: ROHS3 compliance and EAR99 classification

The ELT-316SURWA/S530-A3 from Everlight Electronics qualifies as a substitute based on matching these core parameters. While secondary characteristics such as character height (0.36" vs 0.31"), test current (20mA vs 10mA), and brightness (11mcd vs 4mcd) differ, these variations remain within acceptable tolerance for common anode 7-segment display applications where the primary functional requirements are met.

Parameter Comparison

Engineering Selection Recommendations

The ELT-316SURWA/S530-A3 serves as the primary substitute for the obsolete LB-303VA. Both components maintain ROHS3 compliance and EAR99 classification, ensuring regulatory alignment for existing and new applications. The substitute part is currently in active production status with confirmed inventory availability, providing supply chain continuity.

Physical dimensions differ slightly between the two parts. The ELT-316SURWA/S530-A3 exhibits increased character height (0.36" vs 0.31") and overall module depth (0.283" vs 0.197"), which may require PCB layout verification in space-constrained applications. The 12-DIP package footprint remains compatible.

Electrical operation differs in test current specification (20mA vs 10mA) and brightness output (11mcd vs 4mcd). Applications requiring the original brightness profile should incorporate appropriate current-limiting resistor adjustments to maintain equivalent luminous intensity. The forward voltage remains constant at 2V, preserving driver circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ELT-316SURWA/S530-A3 directly replace the LB-303VA without circuit modifications?

A: Pin configuration and electrical operating voltage are compatible. However, the higher test current specification (20mA vs 10mA) and increased brightness (11mcd vs 4mcd) may require adjustment of current-limiting resistors to match the original design's luminous output. Physical dimensions differ slightly; verify PCB layout clearances.

Q: What are the key compatibility criteria for 7-segment display substitution?

A: Critical parameters include character count, display type (7-segment), common pin configuration (common anode), color specification, forward voltage, and 12-DIP package format. These parameters determine functional and electrical interchangeability.

Q: Why does the substitute part have higher brightness and current specifications?

A: The ELT-316SURWA/S530-A3 represents a more recent design iteration with improved LED efficiency. Higher millicandela rating and test current reflect advances in LED technology. Circuit design should accommodate these specifications through appropriate resistor selection.

Q: Are both parts compliant with current regulatory standards?

A: Both the LB-303VA and ELT-316SURWA/S530-A3 maintain ROHS3 compliance and EAR99 classification. The substitute part's active production status ensures ongoing compliance with evolving regulatory requirements.

Q: What should be verified before implementing the substitute part?

A: Confirm PCB layout accommodates the slightly larger physical dimensions. Adjust current-limiting resistor values if the original design requires specific brightness levels. Verify driver circuit can supply the higher test current if needed for full brightness operation.