LF-301MK Equivalent & Substitute Parts

Part Overview

The LF-301MK is a single-character green 7-segment LED display module manufactured by Rohm Semiconductor, designed for numeric and alphanumeric display applications. This part operates with a common cathode configuration and is housed in a 10-SMD, No Lead package. The product is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and component procurement.

Substiute Parts

LF-301MK

Rohm SemiconductorIn Stock: 774LF-301MK Datasheet

Current PartRFQ

LF-3011MK

Rohm SemiconductorIn Stock: 2208LF-3011MK Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LF-301MK is determined by strict alignment of the following critical parameters:

• Display Type: 7-Segment configuration
• Number of Characters: Single character (1)
• Color: Green
• Common Pin Configuration: Common Cathode
• Digit Size: 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: 2.1V
• Current - Test: 10mA
• Millicandela Rating: 10mcd
• Wavelength - Peak: 563nm

The LF-3011MK meets all functional and electrical requirements for substitution. Both parts share identical display characteristics, electrical performance specifications, and physical footprint dimensions. The primary distinction lies in package lead configuration and power dissipation rating, which do not affect functional compatibility in standard applications.

Parameter Comparison

Engineering Selection Recommendations

The LF-3011MK is the direct functional equivalent for the obsolete LF-301MK. Both parts maintain identical electrical specifications, display characteristics, and physical dimensions required for PCB integration.

The LF-3011MK carries Active product status, ensuring continued availability and manufacturing support. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current design implementations.

The primary design consideration is package lead configuration: the LF-301MK uses No Lead termination, while the LF-3011MK employs Gull Wing leads. This difference requires PCB footprint adjustment during component substitution. The LF-3011MK exhibits higher power dissipation rating (480mW versus 60mW), which does not constrain application in standard display circuits operating at specified test current levels.

The LF-3011MK's MSL rating of 3 (168 Hours) requires standard moisture control during storage and assembly, compared to the LF-301MK's unlimited MSL rating. This represents a minor handling consideration with no impact on final product performance.

Frequently Asked Questions (FAQ)

Q: Can the LF-3011MK directly replace the LF-301MK without circuit modification?

A: Electrical and functional compatibility is complete. PCB footprint modification is required due to package lead configuration differences (No Lead versus Gull Wing). Circuit operation remains unchanged when proper footprint design is implemented.

Q: Are there differences in display brightness or color between these parts?

A: No. Both parts specify identical millicandela rating (10mcd), wavelength peak (563nm), and forward voltage (2.1V). Display brightness and color characteristics are equivalent.

Q: What is the impact of the different power dissipation ratings?

A: The LF-3011MK's higher power dissipation rating (480mW) reflects package design differences and does not affect operation at the specified test current of 10mA. Both parts operate identically in standard applications.

Q: Does the MSL difference affect component selection?

A: The LF-3011MK's MSL 3 rating requires standard moisture control during storage and assembly. This is a handling consideration only and does not impact electrical performance or final product reliability when proper storage conditions are maintained.

Q: Why is the LF-301MK classified as obsolete?

A: The LF-301MK is no longer in active production. The LF-3011MK provides continued availability with identical functional performance and active manufacturing status.