LB-603VF 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LB-603VF is a 3-character red 7-segment LED display module manufactured by Rohm Semiconductor, designed for numeric and alphanumeric display applications. This common anode display operates at 2V forward voltage with a 10mA test current and features a 0.56" character size in a 28-DIP package. The product is currently active and widely used in industrial control panels, instrumentation, and consumer electronics requiring compact numeric display solutions. Substitute parts may be required due to inventory constraints, supply chain considerations, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

LB-603VF

Rohm SemiconductorIn Stock: 1357LB-603VF Datasheet

Current PartRFQ

LDT-A514RI

Lumex Opto/Components Inc.In Stock: 868LDT-A514RI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LB-603VF are qualified based on the following critical parameters that ensure functional and mechanical compatibility:

Primary Compatibility Criteria:

• Display type: 7-Segment configuration
• Number of characters: 3-character display
• Common pin configuration: Common Anode
• Character size: 0.56" nominal dimension
• Package type: 28-DIP (0.600", 15.24mm)
• Color: Red LED
• Voltage range: Forward voltage within acceptable operating tolerance
• Current rating: 10mA test current compatibility
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The LDT-A514RI from Lumex Opto/Components Inc. qualifies as a substitute part because it maintains identical display configuration, package type, character count, common anode topology, and regulatory compliance status. Minor variations in forward voltage (2.1V vs. 2V), physical dimensions (within manufacturing tolerance), and wavelength characteristics do not preclude substitution in standard applications where the display module functions as a direct replacement in existing PCB layouts and driver circuits.

Parameter Comparison

Engineering Selection Recommendations

Both the LB-603VF and LDT-A514RI maintain active product status with full ROHS3 compliance and REACH unaffected designation, ensuring regulatory compatibility for current and future applications. The LB-603VF is the primary part with established supply availability (1273 pcs in stock). The LDT-A514RI serves as a qualified substitute with confirmed inventory (759 pcs in stock).

Selection between these parts should be based on availability and supply chain requirements. The forward voltage differential of 0.1V (2V vs. 2.1V) is within standard LED driver circuit tolerance and does not require circuit redesign. Both parts are packaged identically in 28-DIP format and maintain compatible pinout configurations for direct PCB substitution. The wavelength variation (650nm vs. 635nm) represents a minor shift within the red spectrum and does not affect functional display performance in standard numeric display applications.

Frequently Asked Questions (FAQ)

Q: Can the LDT-A514RI replace the LB-603VF in existing designs without PCB modification?

A: Yes. Both parts use identical 28-DIP (0.600", 15.24mm) packaging with compatible pinout configurations. Direct socket substitution is possible without PCB layout changes.

Q: What is the significance of the 0.1V forward voltage difference between these parts?

A: The forward voltage difference (2V vs. 2.1V) is within standard LED driver circuit design margins. Existing current-limiting resistor networks will accommodate this variation without performance degradation or component stress.

Q: Are there any compliance or regulatory differences between these substitute parts?

A: No. Both parts maintain identical ROHS3 compliance status, REACH unaffected designation, and MSL 1 (Unlimited) moisture sensitivity rating. No regulatory or certification barriers exist for substitution.

Q: How do the wavelength specifications (650nm vs. 635nm) affect display appearance?

A: Both wavelengths fall within the red spectrum. The 15nm difference represents a minor shift toward orange-red and is not perceptible in standard numeric display applications. Visual appearance remains consistent with red LED display expectations.

Q: What packaging format is used for each part?

A: Both the LB-603VF and LDT-A514RI are supplied in 28-DIP packages. The LB-603VF is available in Bulk packaging, while the LDT-A514RI is supplied in Tube packaging. Both formats are compatible with standard component handling and assembly processes.

Q: Are both parts suitable for new design implementations?

A: Yes. Both parts maintain active product status and full regulatory compliance, making them suitable for new designs. Selection should be based on supplier availability and lead time requirements.