LB-502MD 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LB-502MD is a dual-character 7-segment LED display module manufactured by Rohm Semiconductor. This green common anode display operates at 2.1V forward voltage with a 0.51" digit height and 18-DIP package configuration. The component is Active status and RoHS3 compliant, designed for numeric and alphanumeric display applications requiring compact form factors.

Substitute parts are necessary when the primary component faces supply constraints, extended lead times, or when design requirements permit variations in physical dimensions, brightness ratings, or electrical characteristics within acceptable operational parameters.

Substiute Parts

LB-502MD

Rohm SemiconductorIn Stock: 910LB-502MD Datasheet

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DA56-11GWA

KingbrightIn Stock: 1836DA56-11GWA Datasheet

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HDSP-521G

Broadcom LimitedIn Stock: 25647HDSP-521G Datasheet

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HDSP-K511

Broadcom LimitedIn Stock: 33995HDSP-K511 Datasheet

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LDD-A512RI

Lumex Opto/Components Inc.In Stock: 2817LDD-A512RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LB-502MD is determined by the following critical parameters:

• Display Configuration: 2-character, 7-segment, common anode topology
• Package Type: 18-DIP (0.600", 15.24mm) pin spacing
• Color: Green LED emission
• Electrical Compatibility: Forward voltage range 2.0V to 2.2V; test current 10mA to 20mA
• Wavelength Range: 563nm to 568nm (green spectrum)
• Compliance: RoHS3 compliant; REACH unaffected status

All listed substitute parts maintain identical package footprints and pin configurations, enabling direct PCB-level replacement. Variations in digit height (0.51" to 0.56"), brightness (2.5mcd to 25mcd), and forward voltage (2.0V to 2.2V) are within acceptable substitution parameters for applications where these characteristics do not impose critical design constraints.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 compliance, ensuring regulatory alignment and long-term availability. Selection among substitutes should be based on the following criteria derived from provided specifications:

Brightness Consideration: The LB-502MD operates at 25mcd, the highest brightness rating in this group. Substitute parts range from 2.5mcd to 11mcd. Applications requiring equivalent or higher brightness should prioritize DA56-11GWA (11mcd) as the closest alternative.

Electrical Compatibility: Forward voltage variations (2.0V to 2.2V) and test current differences (10mA to 20mA) are within standard LED driver tolerance ranges. HDSP-521G operates at the lowest forward voltage (2.0V), while DA56-11GWA and LDD-A512RI operate at 2.2V. Current-limiting resistor values may require adjustment based on driver circuit design.

Physical Dimensions: The LB-502MD features a 0.51" digit height, while all substitutes provide 0.56" digits. This 0.05" increase may impact visual display uniformity in applications with strict aesthetic requirements or space constraints.

Wavelength Alignment: All parts emit within the green spectrum (563nm to 568nm), with negligible perceptual color variation across the group.

Packaging and Inventory: All parts utilize identical 18-DIP footprints. Substitute availability ranges from 1,755 to 33,942 units in stock, providing supply flexibility.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LB-502MD with any of these substitute parts on my PCB?

A: Yes. All substitute parts share the identical 18-DIP (0.600", 15.24mm) package footprint and pin configuration. Direct PCB-level replacement is supported without layout modifications.

Q: Will the display brightness appear different if I substitute to another part?

A: Brightness differences exist. The LB-502MD operates at 25mcd, while substitutes range from 2.5mcd to 11mcd. Visual brightness variation will be noticeable in applications where the LB-502MD's higher brightness is critical. DA56-11GWA provides the closest brightness match at 11mcd.

Q: Do I need to modify my driver circuit for electrical compatibility?

A: Forward voltage variations (2.0V to 2.2V) are within standard LED driver tolerance. However, test current differences (10mA to 20mA) may require current-limiting resistor recalculation. HDSP-521G at 2.0V and DA56-11GWA at 20mA represent the electrical extremes in this group.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the regulatory status of the LB-502MD.

Q: What is the physical size difference between the LB-502MD and substitute parts?

A: The LB-502MD has 0.51" digit height. All substitutes provide 0.56" digits, a 0.05" increase. Overall module heights range from 0.689" (LB-502MD) to 0.750" (DA56-11GWA). Verify clearance in space-constrained applications.

Q: Which substitute part has the closest electrical match to the LB-502MD?

A: HDSP-K511 provides the closest electrical match, operating at identical 2.1V forward voltage and 10mA test current. Brightness (2.5mcd) and wavelength (566nm) differ from the original specification.