TLMB3104-GS08 Equivalent & Substitute Parts

Part Overview

The TLMB3104-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 a forward voltage of 3.9V with a test current of 10mA and delivers 8.75mcd at a dominant wavelength of 466nm. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

TLMB3104-GS08

Vishay Semiconductor Opto DivisionIn Stock: 746TLMB3104-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

The substitute part 67-21SUBC/S400-X9/TR8 (Everlight Electronics Co Ltd) is classified as a functional equivalent based on the following substitution criteria:

Matching Parameters:

• Color: Blue
• Viewing Angle: 120°
• Lens Style: Round with Flat Top
• Lens Size: 2.40mm Dia
• Mounting Type: Surface Mount
• Wavelength range: Blue spectrum (466nm dominant vs. 470nm dominant)

Allowable Variations:

• Forward Voltage: 3.9V (TLMB3104-GS08) vs. 4.6V (67-21SUBC/S400-X9/TR8) — within acceptable tolerance for blue LED indication circuits
• Test Current: 10mA vs. 20mA — substitute operates at higher test current, indicating higher brightness capability
• Millicandela Rating: 8.75mcd vs. 135mcd — substitute provides increased luminous intensity
• Package Form: 2-SMD, J-Lead vs. 1411 (3528 Metric) — both are surface mount configurations with compatible footprint dimensions
• Height: 1.75mm vs. 0.85mm — substitute is lower profile, suitable for space-constrained applications

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: The 67-21SUBC/S400-X9/TR8 is suitable as a substitute for the obsolete TLMB3104-GS08 in applications where the following conditions are met:

• Circuit design accommodates forward voltage of 4.6V (versus original 3.9V specification)
• Increased brightness output (135mcd versus 8.75mcd) is acceptable or beneficial for the application
• PCB layout can accommodate the 0.5mm length difference (4.60mm vs. 3.00mm)
• Lower profile height (0.85mm vs. 1.75mm) does not conflict with mechanical constraints
• Test current operation at 20mA is compatible with existing current-limiting circuit design

Compliance Considerations: The TLMB3104-GS08 carries ROHS3 compliance and REACH Unaffected status. The substitute part's compliance certifications are not specified in the provided data and must be verified through the manufacturer's documentation before final selection.

Inventory Status: The substitute part (67-21SUBC/S400-X9/TR8) is currently in active production with 1090 units available in stock, providing reliable procurement availability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the 67-21SUBC/S400-X9/TR8 be used as a direct drop-in replacement for the TLMB3104-GS08?

A: The substitute part is functionally equivalent for blue LED indication applications. However, it is not a true drop-in replacement due to differences in forward voltage (4.6V vs. 3.9V), package dimensions (4.60mm L vs. 3.00mm L), and height (0.85mm vs. 1.75mm). Circuit design review and PCB layout verification are required.

Q: What is the impact of the 0.4V forward voltage difference?

A: The substitute operates at 4.6V compared to the original 3.9V. This difference affects current-limiting resistor calculations in the LED drive circuit. Existing resistor values must be recalculated to maintain proper current levels at the lower forward voltage.

Q: Why does the substitute have a higher millicandela rating?

A: The 67-21SUBC/S400-X9/TR8 is rated at 135mcd versus 8.75mcd for the original part. This indicates higher luminous intensity output. Applications requiring lower brightness may need to adjust current-limiting resistor values or implement dimming control.

Q: Are the package dimensions compatible with the original PCB layout?

A: The substitute uses a 1411 (3528 Metric) package versus the original 2-SMD, J-Lead configuration. While both are surface mount devices with similar footprints, the length difference (4.60mm vs. 3.00mm) and height difference (0.85mm vs. 1.75mm) require PCB layout verification before implementation.

Q: What compliance certifications apply to the substitute part?

A: The original TLMB3104-GS08 is ROHS3 compliant and REACH Unaffected. The substitute part's compliance status is not specified in the provided data and must be confirmed with Everlight Electronics Co Ltd before use in regulated applications.

Q: Is the 120° viewing angle maintained in the substitute?

A: Yes, both the original and substitute parts maintain a 120° viewing angle with identical round flat-top lens styles and 2.40mm diameter lens sizes.