VLMS31J1L2-GS18 Equivalent & Substitute Parts

Part Overview

The VLMS31J1L2-GS18 is a red 630nm LED indication component manufactured by Vishay Semiconductor Opto Division in a 2-SMD, J-Lead surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The component operates at 1.9V forward voltage with a 10mA test current and delivers 11mcd luminous intensity with a 120° viewing angle. Substitute parts maintain the same mechanical form factor, optical characteristics, and electrical performance envelope while offering active product status and improved supply availability.

Substiute Parts

VLMS31J1L2-GS18

Vishay Semiconductor Opto DivisionIn Stock: 1063VLMS31J1L2-GS18 Datasheet

Current PartRFQ

VLMD3100-GS08

Vishay Semiconductor Opto DivisionIn Stock: 25863VLMD3100-GS08 Datasheet

Parametric EquivalentRFQ

VLMD3100-GS18

Vishay Semiconductor Opto DivisionIn Stock: 970VLMD3100-GS18 Datasheet

Parametric EquivalentRFQ

VLMS30J1L2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 5946VLMS30J1L2-GS08 Datasheet

Parametric EquivalentRFQ

VLMS30J1L2-GS18

Vishay Semiconductor Opto DivisionIn Stock: 788VLMS30J1L2-GS18 Datasheet

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VLMS30K1L2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 38255VLMS30K1L2-GS08 Datasheet

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VLMS31J1L2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 8224VLMS31J1L2-GS08 Datasheet

Parametric EquivalentRFQ

VLMS31K1L2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 9222VLMS31K1L2-GS08 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VLMS31J1L2-GS18 is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must maintain identical package type (2-SMD, J-Lead), physical dimensions (3.00mm L x 2.80mm W, 1.85mm max height), lens style (Round with Flat Top), and lens size (2.40mm Dia).

Optical Characteristics: Substitute parts must operate in the red spectrum with dominant wavelength at 630nm and peak wavelength at 643nm. Luminous intensity (millicandela rating) and viewing angle (120°) define the optical performance envelope.

Electrical Parameters: Forward voltage (Vf) tolerance and test current define the electrical operating point. Parts with Vf of 1.8V or 1.9V and test currents of 2mA or 10mA are functionally equivalent within standard LED circuit design margins.

Compliance & Status: All substitute parts must maintain ROHS3 compliance, identical MSL rating (2A, 4 Weeks), and active product status for supply continuity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - Identical Electrical & Optical Match: VLMS31J1L2-GS08 provides direct substitution with matching 1.9V forward voltage, 10mA test current, 11mcd rating, and 630nm dominant wavelength. The only difference is active product status and Tape & Reel packaging format. This part is recommended for designs requiring exact electrical and optical performance replication.

Secondary Substitute - Enhanced Brightness: VLMS31K1L2-GS08 maintains identical electrical parameters (1.9V, 10mA) and wavelength (630nm) while offering increased luminous intensity at 13mcd. This part is suitable for applications where enhanced brightness is acceptable or beneficial without circuit redesign.

Low-Current Alternatives: VLMS30J1L2-GS08 and VLMS30K1L2-GS08 operate at reduced forward voltage (1.8V) and test current (2mA), making them suitable for power-constrained applications. VLMS30K1L2-GS08 offers the highest inventory availability (38150 Pcs) among active parts and delivers 13mcd brightness at lower power consumption.

Wavelength Variant: VLMD3100-GS08 and VLMD3100-GS18 shift the dominant wavelength to 648nm (peak 650nm) while maintaining 1.8V forward voltage and 10mA test current. These parts are suitable only when the longer wavelength is acceptable for the application's color specification.

All substitute parts maintain ROHS3 compliance, identical MSL rating (2A, 4 Weeks), and surface mount compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can VLMS31J1L2-GS08 directly replace VLMS31J1L2-GS18 in production? A: Yes. Both parts share identical electrical (1.9V, 10mA), optical (630nm, 11mcd, 120°), and mechanical specifications. The difference is packaging format (Tape & Reel vs. Bulk) and product status (Active vs. Obsolete). Tape & Reel packaging is standard for high-volume production.

Q: What is the difference between VLMS31K1L2-GS08 and VLMS31J1L2-GS08? A: The K-variant delivers 13mcd luminous intensity compared to 11mcd in the J-variant. Both maintain identical 1.9V forward voltage, 10mA test current, and 630nm wavelength. The K-variant is suitable when increased brightness is required without circuit modification.

Q: Can VLMS30K1L2-GS08 replace VLMS31J1L2-GS18? A: Partial compatibility exists. VLMS30K1L2-GS08 operates at lower forward voltage (1.8V vs. 1.9V) and test current (2mA vs. 10mA), reducing power consumption. The 630nm wavelength and 120° viewing angle remain identical. Circuit redesign may be necessary to accommodate the lower voltage and current specifications.

Q: Why are VLMD3100 parts listed as substitutes if the wavelength differs? A: VLMD3100-GS08 and VLMD3100-GS18 maintain identical mechanical form factor, package type, and similar electrical parameters (1.8V, 10mA). The 648nm dominant wavelength represents a shift in the red spectrum. These parts are substitutes only when wavelength variation is acceptable for the application.

Q: What packaging format should be selected for new designs? A: Tape & Reel (TR) packaging is standard for surface mount production. All active substitute parts are available in Tape & Reel format. Bulk packaging is no longer standard for this product category.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and identical Moisture Sensitivity Level (2A, 4 Weeks) as the original VLMS31J1L2-GS18.