VLMB31J2K2-GS08 Equivalent & Substitute Parts

Part Overview

The VLMB31J2K2-GS08 is a blue LED indication component manufactured by Vishay Semiconductor Opto Division, designed for discrete surface mount applications. This part operates at a forward voltage of 3.9V with a test current of 10mA and delivers 8.4 millicandela at a dominant wavelength of 466nm. The component features a clear round lens with flat top design in a 2-PLCC package configuration.

This part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support, production continuity, and system maintenance. Identifying compatible alternatives ensures access to functionally equivalent solutions that meet the same electrical and mechanical requirements.

Substiute Parts

VLMB31J2K2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 873VLMB31J2K2-GS08 Datasheet

Current PartRFQ

5973601207F

DialightIn Stock: 18125973601207F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the VLMB31J2K2-GS08 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Package configuration: 2-PLCC (mandatory match)
• Mounting type: Surface Mount (mandatory match)
• Color: Blue (mandatory match)
• Lens transparency: Clear (mandatory match)
• Lens style: Round with Flat Top (mandatory match)
• Viewing angle: 120° (mandatory match)
• Peak wavelength: 428nm (mandatory match)
• Forward voltage range: 4.6V to 3.9V (acceptable tolerance)
• Test current: 10mA (standard reference)
• Millicandela rating: Minimum 8.4mcd (performance baseline)
• Compliance: ROHS3 Compliant (regulatory requirement)

The substitute part 5973601207F from Dialight meets all mandatory electrical and mechanical criteria, with forward voltage of 4.6V (within acceptable range for blue LED indication circuits) and millicandela rating of 11.15mcd (exceeds baseline performance).

Parameter Comparison

Engineering Selection Recommendations

The 5973601207F from Dialight is a direct substitute for the VLMB31J2K2-GS08. Both components are classified as obsolete and maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for applications requiring these certifications.

The forward voltage differential of 0.4V (3.9V vs. 4.6V) is within acceptable tolerance for blue LED indication circuits and does not present compatibility issues in standard series-resistor-limited applications. The substitute part delivers higher luminous intensity at 11.15mcd compared to the original 8.4mcd, providing enhanced visibility margin.

Physical dimensions are comparable, with the substitute part measuring 3.20mm L x 2.70mm W x 1.90mm H (max) versus the original 3.00mm L x 2.80mm W x 1.85mm H (max). These dimensional variations remain within typical PCB layout tolerances for 2-PLCC surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the 5973601207F replace the VLMB31J2K2-GS08 in existing designs?

A: Yes. Both components share identical package configuration (2-PLCC), mounting type (surface mount), optical properties (blue color, clear lens, round flat-top style, 120° viewing angle, 428nm peak wavelength), and regulatory compliance (ROHS3). The forward voltage difference of 0.4V is within acceptable operating range for standard LED indication circuits.

Q: What is the impact of the 0.4V forward voltage difference?

A: In series-resistor-limited LED circuits, a 0.4V difference requires minimal adjustment to current-limiting resistor values. For a 10mA test current application, this represents a manageable design parameter and does not compromise functional performance.

Q: Are there dimensional compatibility concerns?

A: The substitute part dimensions (3.20mm L x 2.70mm W x 1.90mm H max) differ slightly from the original (3.00mm L x 2.80mm W x 1.85mm H max). These variations are within standard PCB layout tolerances for 2-PLCC components and do not present mechanical compatibility issues.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the VLMB31J2K2-GS08 and 5973601207F are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements for applications requiring these certifications.

Q: Why is the substitute part rated at higher millicandela?

A: The 5973601207F delivers 11.15mcd compared to the original 8.4mcd at the same 10mA test current. This represents enhanced luminous intensity and provides additional visibility margin in indication applications without requiring circuit modifications.