VLMF31Q2T1-GS18 Equivalent & Substitute Parts

Part Overview

The VLMF31Q2T1-GS18 is an orange 605nm LED indicator in a 2-SMD, J-Lead surface mount package manufactured by Vishay Semiconductor Opto Division. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing production and maintenance applications. The part delivers 223mcd luminous intensity with a 120° viewing angle, suitable for discrete LED indication circuits requiring standard orange wavelength output.

Substiute Parts

VLMF31Q2T1-GS18

Vishay Semiconductor Opto DivisionIn Stock: 805VLMF31Q2T1-GS18 Datasheet

Current PartRFQ

VLMF31Q2T1-GS08

Vishay Semiconductor Opto DivisionIn Stock: 997VLMF31Q2T1-GS08 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The VLMF31Q2T1-GS08 qualifies as a parametric equivalent to the VLMF31Q2T1-GS18 based on the following substitution criteria:

Electrical Parameters (Identical):

• Forward voltage (Vf): 2V
• Test current: 20mA
• Wavelength dominant: 605nm
• Wavelength peak: 610nm
• Millicandela rating: 223mcd
• Viewing angle: 120°

Mechanical Parameters (Identical):

• Package type: 2-SMD, J-Lead
• Lens style: Round with Flat Top
• Lens size: 2.40mm Dia
• Physical dimensions: 3.00mm L x 2.80mm W
• Maximum height: 1.85mm
• Mounting type: Surface Mount

Compliance Parameters (Identical):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 2A (4 Weeks)

The primary difference between these parts is packaging format and product status. The substitute part is supplied in Tape & Reel (TR) format and maintains Active product status, whereas the main part is Obsolete.

Parameter Comparison

Engineering Selection Recommendations

The VLMF31Q2T1-GS08 is a direct parametric equivalent for the obsolete VLMF31Q2T1-GS18. All electrical, mechanical, and compliance specifications are identical. The substitute part maintains Active product status with Vishay Semiconductor Opto Division, ensuring continued availability and support.

Selection of the VLMF31Q2T1-GS08 is appropriate for:

• New production designs requiring orange 605nm LED indication
• Replacement of obsolete VLMF31Q2T1-GS18 components in existing applications
• Applications requiring ROHS3 compliance and MSL 2A moisture sensitivity rating

The Tape & Reel packaging format of the substitute part is standard for high-volume surface mount assembly operations and does not affect electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the VLMF31Q2T1-GS08 be used as a direct replacement for the VLMF31Q2T1-GS18?

A: Yes. Both parts are identical in all electrical parameters (forward voltage, test current, wavelength, luminous intensity, viewing angle), mechanical specifications (package type, dimensions, height, lens style), and compliance certifications (RoHS3, MSL rating). The substitute part is the recommended choice for new applications due to its Active product status.

Q: What is the difference between the two part numbers?

A: The primary differences are product status and packaging format. The VLMF31Q2T1-GS18 is Obsolete and supplied in standard packaging, while the VLMF31Q2T1-GS08 is Active and supplied in Tape & Reel format. Tape & Reel packaging is standard for automated surface mount assembly and does not affect component performance or compatibility.

Q: Are there any circuit design considerations when switching from VLMF31Q2T1-GS18 to VLMF31Q2T1-GS08?

A: No circuit design changes are required. Both parts operate at identical forward voltage (2V) and test current (20mA), with matching wavelength and luminous intensity specifications. PCB layout and component footprints remain unchanged.

Q: What is the MSL 2A rating and how does it affect handling?

A: MSL 2A indicates Moisture Sensitivity Level 2A with a floor life of 4 weeks. Components must be stored in dry conditions and used within 4 weeks of package opening. Standard moisture barrier packaging and handling procedures apply.

Q: Is the VLMF31Q2T1-GS08 RoHS compliant?

A: Yes. The VLMF31Q2T1-GS08 is ROHS3 Compliant, meeting all RoHS 3 directive requirements for restricted substances.