LB-402DN 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LB-402DN is a 2-character, 0.40-inch orange 7-segment LED display manufactured by Rohm Semiconductor in an 18-DIP package configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The display operates at 2V forward voltage with a 10mA test current and features common cathode configuration suitable for multiplexed or direct-drive applications in numeric display systems.

Substiute Parts

LB-402DN

Rohm SemiconductorIn Stock: 1077LB-402DN Datasheet

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EADCD040OA1

Everlight Electronics Co LtdIn Stock: 1140EADCD040OA1 Datasheet

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EADCD056OA1

Everlight Electronics Co LtdIn Stock: 926EADCD056OA1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LB-402DN are selected based on the following critical parameters that determine functional compatibility:

• Display Type & Configuration: All substitutes must be 7-segment displays with common cathode configuration
• Character Count: 2-character displays only
• Digit Size: 0.40-inch (10.16mm) nominal dimension
• Color: Orange LED emission
• Electrical Characteristics: Forward voltage of 2V and operating current compatibility
• Package Type: DIP package configuration (18-DIP or 10-DIP with equivalent pin density)
• Compliance: ROHS3 compliance and EAR99 classification maintained

Two substitute parts meet these criteria with variations in package density and electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

EADCD040OA1 (Everlight Electronics Co Ltd) is the primary substitute for direct form-factor replacement when package density is not a constraint. This part maintains the 0.40-inch digit size and 2-character configuration with identical 2V forward voltage. The 10-DIP package requires PCB layout modification compared to the original 18-DIP footprint. Product status is active with full ROHS3 compliance and EAR99 classification, ensuring long-term availability and regulatory compliance.

EADCD056OA1 (Everlight Electronics Co Ltd) is an alternative substitute when increased digit visibility is required. This part maintains the 18-DIP package footprint, eliminating PCB redesign requirements. The 0.56-inch digit size represents a dimensional increase suitable for applications requiring enhanced readability. Product status is active with equivalent compliance certifications. The larger digit size may affect display panel layout and viewing angle characteristics.

Both substitutes operate at 2V forward voltage with increased test current (20mA versus 10mA) and higher power dissipation (60mW versus 40mW), requiring circuit design verification for current-limiting resistor values and thermal management.

Frequently Asked Questions (FAQ)

Q: Can EADCD040OA1 be used as a direct replacement for LB-402DN without PCB modification?

A: No. While EADCD040OA1 maintains identical digit size (0.40") and character count (2), the package changes from 18-DIP to 10-DIP configuration. This requires PCB footprint redesign and pin reassignment. Pin-to-pin compatibility does not exist between these packages.

Q: What is the impact of increased current consumption (20mA vs 10mA) when substituting with Everlight parts?

A: Current-limiting resistor values must be recalculated based on the 2V forward voltage and 20mA test current specification. Power dissipation increases from 40mW to 60mW per display, affecting thermal design in high-density applications. Circuit design review is required to ensure driver capability and power supply capacity.

Q: Is EADCD056OA1 a suitable substitute if digit size increase is acceptable?

A: Yes, for applications where increased digit size (0.56" versus 0.40") does not conflict with display panel dimensions. EADCD056OA1 maintains the 18-DIP package footprint, eliminating PCB redesign. The larger digit size may alter viewing angle performance and display panel layout requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both EADCD040OA1 and EADCD056OA1 are ROHS3 compliant with EAR99 classification, matching the compliance profile of the LB-402DN.

Q: What is the wavelength difference between LB-402DN and substitute parts?

A: LB-402DN operates at 610nm peak wavelength, while both Everlight substitutes operate at 621nm. This represents a minor shift in orange color perception within the orange LED spectrum range. Visual color matching in existing display panels may require assessment.