TLMB3101-GS08 Equivalent & Substitute Parts

Part Overview

The TLMB3101-GS08 is a blue LED indication component manufactured by Vishay Semiconductor Opto Division, configured as a 2-SMD, J-Lead surface mount device. This part operates at 3.9V forward voltage with a dominant wavelength of 466nm and delivers 8.25mcd at 10mA test current. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

TLMB3101-GS08

Vishay Semiconductor Opto DivisionIn Stock: 938TLMB3101-GS08 Datasheet

Current PartRFQ

67-21SUBC/S400-X9/TR8

Everlight Electronics Co LtdIn Stock: 111167-21SUBC/S400-X9/TR8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLMB3101-GS08 is determined by the following critical parameters:

• Color and Wavelength: Blue spectrum operation (dominant wavelength 466nm–470nm range)
• Optical Output: Millicandela rating and luminous intensity characteristics
• Electrical Characteristics: Forward voltage (Vf) and test current compatibility
• Viewing Angle: 120° standard viewing angle
• Lens Configuration: Round with flat top, 2.40mm diameter
• Mounting Technology: Surface mount, SMD package format
• Mechanical Compatibility: Physical dimensions and height constraints for PCB assembly
• Regulatory Compliance: RoHS3 compliance and MSL rating

The substitute part 67-21SUBC/S400-X9/TR8 (Everlight Electronics Co Ltd) meets these substitution criteria within the allowed parameter tolerances for blue LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

The TLMB3101-GS08 is classified as obsolete. The substitute part 67-21SUBC/S400-X9/TR8 is an active product from Everlight Electronics Co Ltd, ensuring long-term availability and supply chain continuity.

Both parts operate within the blue LED spectrum and maintain 120° viewing angle compatibility. The substitute part operates at a lower forward voltage (4.6V vs. 3.9V) and delivers significantly higher optical output (135mcd vs. 8.25mcd at higher test current). The substitute part uses a 1411 (3528 Metric) package format with reduced height (0.85mm vs. 1.75mm), which may require PCB layout verification for mechanical clearance and thermal management considerations.

Selection of the substitute part is supported by active product status and RoHS3 compliance alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 67-21SUBC/S400-X9/TR8 directly replace the TLMB3101-GS08 without circuit modification?

A: The substitute part operates at 4.6V forward voltage compared to 3.9V for the original part. Circuit verification is required to confirm that the lower forward voltage is compatible with existing current-limiting resistor values and power supply specifications. The higher millicandela rating (135mcd vs. 8.25mcd) may require adjustment of series resistor values to maintain equivalent brightness levels.

Q: What are the mechanical compatibility considerations?

A: The substitute part uses a 1411 (3528 Metric) package with maximum height of 0.85mm, compared to the original 2-SMD, J-Lead package at 1.75mm height. The substitute part is 0.50mm longer (4.60mm vs. 3.00mm). PCB footprint and assembly clearance must be verified before implementation.

Q: Are both parts RoHS3 compliant?

A: The TLMB3101-GS08 is explicitly RoHS3 compliant. Compliance information for the substitute part 67-21SUBC/S400-X9/TR8 is not provided in the available technical data.

Q: What is the wavelength difference between these parts?

A: The dominant wavelength differs by 4nm (466nm vs. 470nm). Both parts operate within the blue spectrum. Peak wavelength values also differ (428nm vs. 468nm). Visual color perception difference is minimal within this wavelength range for blue LED indication applications.

Q: How does the test current difference affect substitution?

A: The substitute part is specified at 20mA test current versus 10mA for the original part. The millicandela rating of 135mcd is measured at this higher current. Direct current-for-current comparison is not applicable; circuit design must account for the different operating points.