TLHY4900 Yellow LED T-1 Equivalent & Substitute Parts

Part Overview

The TLHY4900 is a yellow 588nm LED indicator in T-1 through-hole radial package manufactured by Vishay Semiconductor Opto Division. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The TLHY4900 delivers 26mcd luminous intensity with a 32° viewing angle and operates at 2.4V forward voltage with 10mA test current.

Substiute Parts

TLHY4900

Vishay Semiconductor Opto DivisionIn Stock: 1217TLHY4900 Datasheet

Current PartRFQ

TLHY4205

Vishay Semiconductor Opto DivisionIn Stock: 658TLHY4205 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLHY4900 is determined by strict alignment of the following electrical and mechanical parameters:

• Color and Wavelength: Yellow 588nm dominant wavelength (585nm peak) is the primary functional requirement
• Voltage and Current: Forward voltage of 2.4V at 10mA test current must be maintained
• Lens Configuration: 3mm T-1 through-hole radial package with round domed top lens
• Compliance: ROHS3 compliance and MSL 1 rating required for equivalent substitution
• Luminous Intensity: Millicandela rating and viewing angle determine application suitability

The TLHY4205 qualifies as a direct substitute based on matching color, wavelength, voltage, current, lens style, package type, and compliance certifications. Variations in millicandela rating (20mcd vs 26mcd) and viewing angle (44° vs 32°) represent acceptable performance differences within the yellow LED indicator category.

Parameter Comparison

Engineering Selection Recommendations

The TLHY4205 is the manufacturer-recommended substitute for the obsolete TLHY4900. Both parts maintain identical electrical specifications (2.4V forward voltage, 10mA test current, 588nm wavelength) and comply with ROHS3 and MSL 1 requirements. The TLHY4205 is currently in active production status, ensuring long-term availability and supply chain continuity.

The TLHY4205 exhibits a wider viewing angle (44° versus 32°) and slightly lower luminous intensity (20mcd versus 26mcd), with a marginally reduced maximum height (6.10mm versus 6.40mm). These differences are within acceptable tolerances for yellow LED indicator applications and do not compromise functional compatibility in standard circuit designs.

Frequently Asked Questions (FAQ)

Q: Can TLHY4205 be used as a direct replacement for TLHY4900 in existing designs?

A: Yes. Both parts share identical forward voltage (2.4V), test current (10mA), wavelength (588nm), lens configuration (3mm T-1 round domed top), and mounting type (through-hole radial). The TLHY4205 is the manufacturer-recommended substitute.

Q: What are the differences between TLHY4900 and TLHY4205?

A: The TLHY4205 has a wider viewing angle (44° versus 32°), lower luminous intensity (20mcd versus 26mcd), and slightly reduced maximum height (6.10mm versus 6.40mm). The TLHY4205 is in active production while TLHY4900 is obsolete.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Compliance certifications are identical.

Q: Does the wider viewing angle of TLHY4205 affect circuit compatibility?

A: The wider viewing angle (44° versus 32°) expands the light distribution pattern. This is generally beneficial for indicator applications and does not create compatibility issues. Circuit voltage and current requirements remain unchanged.

Q: Is the height difference between parts significant?

A: The height difference is 0.30mm (6.40mm versus 6.10mm). This is negligible for most through-hole PCB applications and does not affect mechanical or electrical compatibility.