LF-301VA 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LF-301VA is a single-character red 7-segment LED display module manufactured by Rohm Semiconductor. It features a common anode configuration with 0.31" digit height, designed for numeric and alphanumeric display applications. The device operates at 2V forward voltage with 10mA test current and delivers 10 millicandela brightness at 650nm peak wavelength.

The LF-301VA is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design revisions, or inventory replenishment where original stock is unavailable.

Substiute Parts

LF-301VA

Rohm SemiconductorIn Stock: 3149LF-301VA Datasheet

Current PartRFQ

LF-3011VA

Rohm SemiconductorIn Stock: 1377LF-3011VA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LF-301VA is determined by the following critical parameters:

• Display Type: 7-Segment configuration
• Number of Characters: Single character (1)
• Common Pin Configuration: Common Anode
• Color: Red
• Digit Height: 0.31" (8.00mm)
• Physical Dimensions: 0.433" H x 0.268" W x 0.197" D (11.00mm x 6.80mm x 5.00mm)
• Voltage - Forward (Vf) Typical: 2V
• Current - Test: 10mA
• Wavelength - Peak: 650nm

The LF-3011VA qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Both devices share identical display specifications, voltage characteristics, test current, brightness wavelength, and physical footprint. The primary difference lies in packaging configuration and power dissipation rating, which do not affect functional compatibility in applications designed for the LF-301VA.

Parameter Comparison

Engineering Selection Recommendations

The LF-3011VA is a qualified substitute for the LF-301VA based on electrical and mechanical parameter equivalence. Both components are ROHS3 compliant and manufactured by Rohm Semiconductor, ensuring regulatory alignment and supply chain consistency.

The LF-3011VA carries active product status, providing long-term availability and production continuity compared to the obsolete LF-301VA. The substitute's higher power dissipation rating (320mW versus 40mW) and improved moisture sensitivity level (MSL 3 versus MSL 4) represent enhanced performance characteristics that do not compromise compatibility.

The primary consideration is packaging configuration: the LF-301VA uses 10-SMD No Lead termination, while the LF-3011VA uses 10-SMD Gull Wing leads. PCB layout and assembly process compatibility must be evaluated based on your manufacturing equipment and design specifications.

Frequently Asked Questions (FAQ)

Q: Can the LF-3011VA be used as a direct replacement for the LF-301VA in existing designs?

A: The LF-3011VA is electrically and mechanically equivalent to the LF-301VA. Both devices share identical display specifications, voltage characteristics, test current, and physical dimensions. Compatibility depends on PCB assembly capability to accommodate the Gull Wing lead style of the substitute versus the No Lead configuration of the original part.

Q: What is the difference between 10-SMD No Lead and 10-SMD Gull Wing packaging?

A: No Lead packages feature flat termination pads on the component body, while Gull Wing packages have leads that extend outward from the body. These require different PCB pad designs and soldering profiles. Consult your assembly partner to confirm compatibility with your manufacturing process.

Q: Why does the LF-3011VA have a higher power dissipation rating?

A: The LF-3011VA is rated for 320mW maximum power dissipation compared to 40mW for the LF-301VA. This higher rating provides additional thermal margin and does not affect functional operation in applications designed for the original part's specifications.

Q: Are both parts RoHS compliant?

A: Yes, both the LF-301VA and LF-3011VA are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and use.

Q: What does MSL 3 versus MSL 4 mean for component handling?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. MSL 4 allows 72 hours of exposure, while MSL 3 allows 168 hours. The LF-3011VA's lower MSL rating provides a longer handling window before reflow soldering is required.