LA-301MB 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The LA-301MB is a single-character green 7-segment LED display manufactured by Rohm Semiconductor. It is a common anode configuration device housed in a 10-DIP package, designed for numeric and alphanumeric display applications. The part is currently active in production with 1,107 units in stock. Alternative equivalent parts may be required due to supply constraints, design flexibility, or application-specific performance requirements.

Substiute Parts

LA-301MB

Rohm SemiconductorIn Stock: 1180LA-301MB Datasheet

Current PartRFQ

HDSP-U501

Broadcom LimitedIn Stock: 2070HDSP-U501 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Display Configuration: Single-character 7-segment display with common anode configuration and green color output.

Package Compatibility: 10-DIP (0.209", 5.30mm) package type to ensure direct PCB footprint compatibility.

Electrical Specifications: Forward voltage (Vf) of 2.1V and test current of 10mA to maintain circuit design integrity.

Digit Size: 0.31" (8.00mm) character height for consistent visual presentation.

Compliance Standards: ROHS3 compliance and MSL 1 rating to meet regulatory and manufacturing requirements.

The HDSP-U501 manufactured by Broadcom Limited meets all critical substitution criteria. Minor variations in millicandela rating (6.8mcd vs. 10mcd), wavelength peak (566nm vs. 563nm), and maximum power dissipation (105mW vs. 60mW) do not preclude substitution, as these parameters fall within acceptable operational ranges for typical display applications.

Parameter Comparison

Engineering Selection Recommendations

Both the LA-301MB and HDSP-U501 are active production parts with ROHS3 compliance and MSL 1 ratings, meeting current regulatory requirements. Selection between these parts should be based on availability and supply chain considerations. The LA-301MB offers higher brightness (10mcd) and lower maximum power dissipation (60mW), making it suitable for applications requiring optimized power efficiency or enhanced visibility. The HDSP-U501 provides equivalent electrical and mechanical compatibility with slightly different optical and thermal characteristics. Both parts are suitable for direct substitution in 10-DIP common anode 7-segment display applications operating at 2.1V and 10mA.

Frequently Asked Questions (FAQ)

Q: Can the HDSP-U501 be used as a direct replacement for the LA-301MB?

A: Yes. Both parts share identical package type (10-DIP), common anode configuration, digit size (0.31"), forward voltage (2.1V), and test current (10mA). The physical dimensions are nearly identical, with only a 0.1mm difference in width (7.10mm vs. 7.00mm), which does not affect PCB footprint compatibility.

Q: What are the differences in brightness between these parts?

A: The LA-301MB has a millicandela rating of 10mcd at 563nm wavelength, while the HDSP-U501 has 6.8mcd at 566nm wavelength. The wavelength difference of 3nm is imperceptible to the human eye. The brightness difference may be relevant for applications requiring maximum visibility in high ambient light conditions.

Q: Are there thermal considerations when substituting these parts?

A: The HDSP-U501 has a maximum power dissipation of 105mW compared to the LA-301MB at 60mW. In typical 10mA operation, both parts operate within acceptable thermal limits. Applications with continuous high-current operation should account for the higher dissipation rating of the HDSP-U501.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the LA-301MB and HDSP-U501 are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are classified under ECCN EAR99 and HTSUS 8541.41.0000.

Q: What is the physical dimension difference between these parts?

A: The LA-301MB measures 11.00mm x 7.00mm x 5.00mm, while the HDSP-U501 measures 11.00mm x 7.10mm x 5.00mm. The 0.1mm width difference does not impact standard PCB layout or mechanical assembly.