VLMB31J2L2-GS08 Equivalent & Substitute Parts

Part Overview

The VLMB31J2L2-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 dominant wavelength of 466nm and delivers 11.8mcd at 10mA test current. The product is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and component procurement.

Substiute Parts

VLMB31J2L2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 7961VLMB31J2L2-GS08 Datasheet

Current PartRFQ

5973601207F

DialightIn Stock: 18125973601207F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLMB31J2L2-GS08 is determined by the following critical parameters:

Optical Characteristics: Color (Blue), dominant wavelength range (466nm), and luminous intensity (11.8mcd at 10mA test current) establish the primary functional requirements.

Electrical Characteristics: Forward voltage (3.9V typical) and test current (10mA) define the electrical operating point. Substitute parts must operate within compatible voltage and current ranges to function in existing circuit designs.

Mechanical & Package Compatibility: Package type (2-PLCC), mounting type (Surface Mount), and physical dimensions (3.00mm L x 2.80mm W, 1.85mm max height) ensure mechanical fit on printed circuit boards.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status are mandatory for continued use in regulated applications.

The substitute part 5973601207F from Dialight meets these criteria with compatible optical output, package configuration, and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the VLMB31J2L2-GS08 and 5973601207F are classified as obsolete products. Selection between these parts is based on the following engineering criteria:

Voltage Consideration: The 5973601207F operates at 4.6V typical forward voltage compared to 3.9V for the VLMB31J2L2-GS08. This 0.4V difference requires circuit verification to confirm compatibility with existing current-limiting resistor designs and power supply specifications.

Luminous Intensity: The 5973601207F delivers 11.15mcd versus 11.8mcd for the original part, representing a 5.5% reduction in light output. This difference is within typical manufacturing tolerances for LED indication applications.

Physical Dimensions: Both parts maintain compatible 2-PLCC package footprints with minimal dimensional variation (3.00mm vs 3.20mm length, 2.80mm vs 2.70mm width, 1.85mm vs 1.90mm height). PCB layout compatibility is maintained.

Regulatory Compliance: Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.

Frequently Asked Questions (FAQ)

Q: Can the 5973601207F directly replace the VLMB31J2L2-GS08 without circuit modification?

A: Direct replacement requires circuit verification. The 0.4V forward voltage difference necessitates recalculation of current-limiting resistor values to maintain proper LED operating current. Existing resistor values designed for 3.9V operation may result in excessive current through the 4.6V part.

Q: Are the physical dimensions compatible for PCB assembly?

A: Yes. Both parts use 2-PLCC package configuration with compatible mounting footprints. Dimensional variations (3.00mm vs 3.20mm length, 2.80mm vs 2.70mm width) fall within standard PCB design tolerances for surface mount assembly.

Q: What is the significance of the 5.5% luminous intensity difference?

A: The 11.15mcd output of the 5973601207F versus 11.8mcd of the original part represents a minor reduction in light output. For indication applications, this difference is typically imperceptible to human observation and does not affect functional performance.

Q: Are both parts suitable for new designs?

A: Both parts are classified as obsolete. For new designs, consultation with component suppliers is necessary to identify current production alternatives that meet the same optical, electrical, and package specifications.

Q: What are the moisture sensitivity requirements for storage and handling?

A: The VLMB31J2L2-GS08 carries MSL 2A (4 Weeks) rating, while the 5973601207F carries MSL 2 (1 Year) rating. Both require controlled storage conditions. The 5973601207F provides extended moisture tolerance during storage and handling.