VLRK31Q2R1-GS18 Equivalent & Substitute Parts

Part Overview

The VLRK31Q2R1-GS18 is a red 630nm LED indication component manufactured by Vishay Semiconductor Opto Division. This surface mount, bottom entry LED features a 2.1V forward voltage and 115mcd brightness rating in a 2-SMD Z-Bend package configuration. The part is currently classified as obsolete, making identification of equivalent substitute components essential for ongoing production and maintenance applications. Substitute parts must maintain identical electrical characteristics, mechanical compatibility, and optical performance to ensure direct replacement capability.

Substiute Parts

VLRK31Q2R1-GS18

Vishay Semiconductor Opto DivisionIn Stock: 711VLRK31Q2R1-GS18 Datasheet

Current PartRFQ

VLRK31Q1R2-GS08

Vishay Semiconductor Opto DivisionIn Stock: 14837VLRK31Q1R2-GS08 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the VLRK31Q2R1-GS18 are identified based on strict parametric equivalence across the following critical criteria:

Electrical Parameters: Forward voltage (Vf) of 2.1V and test current of 20mA must remain constant to ensure circuit compatibility and prevent overstress or underdrive conditions.

Optical Parameters: Dominant wavelength of 630nm and peak wavelength of 643nm define the red spectral output. Millicandela rating variations within the same product line are acceptable provided the substitute maintains the same optical family classification.

Mechanical Parameters: Surface mount, bottom entry mounting type, 2-SMD Z-Bend package configuration, 2.40mm diameter round lens with flat top, and maximum height of 2.10mm ensure PCB footprint and assembly compatibility.

Compliance Parameters: ROHS3 compliance and MSL 2A rating must be maintained for environmental and manufacturing process compatibility.

The VLRK31Q1R2-GS08 meets all substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The VLRK31Q1R2-GS08 is the direct parametric equivalent for the obsolete VLRK31Q2R1-GS18. Both components share identical electrical specifications (2.1V forward voltage, 20mA test current), optical characteristics (630nm dominant wavelength, 643nm peak wavelength), and mechanical dimensions (2.40mm lens diameter, 2.10mm maximum height, 2-SMD Z-Bend package).

The substitute part offers superior product lifecycle status as an active component with established supply chain availability. Both parts maintain ROHS3 compliance and identical MSL 2A ratings, ensuring compatibility with standard manufacturing processes and environmental requirements.

The millicandela rating increase from 115mcd to 126mcd in the substitute part represents a minor brightness enhancement within the same product family and does not introduce circuit incompatibility. The substitute's Tape & Reel packaging format provides improved handling and assembly efficiency compared to bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the VLRK31Q1R2-GS08 be used as a direct replacement for the VLRK31Q2R1-GS18?

A: Yes. Both components share identical forward voltage (2.1V), test current (20mA), wavelength specifications (630nm dominant, 643nm peak), lens configuration (2.40mm round with flat top), mounting type (surface mount, bottom entry), and package dimensions (3.20mm L x 2.80mm W, 2.10mm height). The substitute is electrically and mechanically compatible for direct PCB substitution.

Q: What is the difference in brightness between these parts?

A: The VLRK31Q2R1-GS18 is rated at 115mcd while the VLRK31Q1R2-GS08 is rated at 126mcd. This 11mcd difference represents approximately 9.6% higher brightness in the substitute part. Both operate at identical electrical parameters and maintain the same optical family classification.

Q: Are there packaging differences between these parts?

A: The main part (VLRK31Q2R1-GS18) is supplied in bulk packaging, while the substitute (VLRK31Q1R2-GS08) is supplied in Tape & Reel (TR) format. Both are compatible with standard SMD assembly equipment. Tape & Reel packaging provides improved handling, traceability, and automated placement efficiency.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both the VLRK31Q2R1-GS18 and VLRK31Q1R2-GS08 are ROHS3 compliant with identical MSL 2A (4 Weeks) moisture sensitivity ratings. They meet the same environmental and manufacturing process requirements.

Q: Why is the main part listed as obsolete?

A: The VLRK31Q2R1-GS18 has reached end-of-life status. The VLRK31Q1R2-GS08 is the active equivalent maintained by Vishay Semiconductor Opto Division for ongoing production and new designs.