TLMB3106-GS08 Equivalent & Substitute Parts

Part Overview

The TLMB3106-GS08 is a blue LED indication component manufactured by Vishay Semiconductor Opto Division, designed for discrete surface mount applications. This part operates at 3.9V forward voltage with a dominant wavelength of 466nm and delivers 12.5mcd luminous intensity. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

TLMB3106-GS08

Vishay Semiconductor Opto DivisionIn Stock: 1156TLMB3106-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 TLMB3106-GS08 is determined by the following critical parameters:

Color and Wavelength Compatibility: The substitute must emit blue light within the visible spectrum. The TLMB3106-GS08 operates at 466nm dominant wavelength; acceptable substitutes operate within the blue spectrum range (typically 460-475nm).

Electrical Characteristics: Forward voltage (Vf) and test current define circuit compatibility. The original part operates at 3.9V with 10mA test current. Substitutes with similar or lower forward voltage and comparable test current ratings maintain circuit-level compatibility without requiring redesign of current-limiting resistor networks.

Optical Performance: Luminous intensity (millicandela rating) and viewing angle determine functional brightness and visibility characteristics. The 120° viewing angle and 12.5mcd rating establish the baseline for optical performance requirements.

Mechanical Compatibility: Lens size (2.40mm diameter), lens style (round with flat top), and overall package dimensions (3.00mm L x 2.80mm W x 1.75mm H max) must accommodate existing PCB layouts and mechanical assemblies.

Mounting and Packaging: Surface mount technology with compatible package footprint is required. The 2-SMD, J-Lead package must be replaceable with equivalent surface mount packages.

Regulatory Compliance: RoHS3 compliance and MSL rating (2A) are mandatory for production environments.

Parameter Comparison

Engineering Selection Recommendations

The 67-21SUBC/S400-X9/TR8 from Everlight Electronics Co Ltd is identified as a functional substitute for the obsolete TLMB3106-GS08. This recommendation is based on the following engineering criteria:

Product Status: The substitute is active and currently in production, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Color and Wavelength: Both parts emit blue light with dominant wavelengths within acceptable tolerance (466nm vs. 470nm). The 4nm difference falls within standard blue LED spectral variation and maintains visual color consistency.

Optical Compatibility: The substitute delivers significantly higher luminous intensity (135mcd vs. 12.5mcd) while maintaining the same 120° viewing angle and 2.40mm lens diameter. This enhanced brightness provides improved visibility margin in indication applications.

Electrical Characteristics: The substitute operates at lower forward voltage (4.6V vs. 3.9V), reducing power dissipation. The test current specification differs (20mA vs. 10mA); circuit design must account for this parameter when sizing current-limiting resistors.

Mechanical Fit: The substitute package (1411/3528 Metric) is 0.5mm longer (4.60mm vs. 3.00mm) and significantly lower in profile (0.85mm vs. 1.75mm). PCB layout verification is required to confirm mechanical clearance and component placement compatibility.

Regulatory Compliance: Both parts meet RoHS3 compliance requirements, ensuring environmental and regulatory alignment for production applications.

Frequently Asked Questions (FAQ)

Q: Can the 67-21SUBC/S400-X9/TR8 be used as a direct drop-in replacement for the TLMB3106-GS08?

A: Electrical substitution is feasible with circuit design review. The substitute operates at lower forward voltage (4.6V vs. 3.9V) and higher test current (20mA vs. 10mA), requiring recalculation of current-limiting resistor values. Mechanical substitution requires PCB layout verification due to dimensional differences: the substitute is 0.5mm longer and 0.9mm lower in profile.

Q: What are the key differences in optical performance?

A: The substitute delivers 10.8 times higher luminous intensity (135mcd vs. 12.5mcd) while maintaining identical viewing angle (120°) and lens diameter (2.40mm). Both parts emit blue light with dominant wavelengths within 4nm of each other (470nm vs. 466nm), ensuring visual color consistency.

Q: Are there packaging considerations for production?

A: The original part uses 2-SMD, J-Lead packaging, while the substitute uses 1411 (3528 Metric) packaging in Tape & Reel format. Component placement equipment and feeder compatibility must be verified before production transition.

Q: How does the forward voltage difference affect circuit design?

A: The substitute operates at 0.4V lower forward voltage (4.6V vs. 3.9V). This reduces voltage drop across the LED, requiring adjustment of current-limiting resistor values to maintain desired operating current. Recalculate resistor values using Ohm's law: R = (Vsupply - Vf) / Iled.

Q: Is the substitute suitable for the same application environments?

A: Both parts meet RoHS3 compliance and carry equivalent regulatory certifications (ECCN: EAR99, HTSUS: 8541.41.0000). The substitute's active product status ensures ongoing availability and manufacturing consistency compared to the obsolete original part.

Q: What is the impact of the higher millicandela rating?

A: The substitute's 135mcd rating provides enhanced brightness compared to the original 12.5mcd. In indication applications, this delivers improved visibility margin and may allow operation at lower drive currents while maintaining adequate brightness. Circuit design should account for this increased optical output.