TLHG5205-AS21 Equivalent & Substitute Parts

Part Overview

The TLHG5205-AS21 is a green diffused LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This T-1 3/4 (5mm) package LED operates at 2V forward voltage with a 50mcd brightness rating and 569nm dominant wavelength. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component sourcing.

Substiute Parts

TLHG5205-AS21

Vishay Semiconductor Opto DivisionIn Stock: 744TLHG5205-AS21 Datasheet

Current PartRFQ

SSL-LX5093XPGC

Lumex Opto/Components Inc.In Stock: 11194SSL-LX5093XPGC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLHG5205-AS21 is determined by the following critical parameters:

• Package Type: T-1 3/4 (5mm) radial through-hole configuration
• Color & Wavelength: Green LED with dominant wavelength in the 555–569nm range
• Electrical Characteristics: Forward voltage tolerance (2V–2.2V) and test current compatibility (10–20mA)
• Optical Properties: Lens style (round with domed top), transparency (diffused or clear), and brightness rating (45–50mcd)
• Mounting: Through-hole radial mounting only
• Mechanical Fit: Maximum height and physical dimensions compatible with PCB layout

The SSL-LX5093XPGC from Lumex Opto/Components Inc. meets these substitution criteria as an active product with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SSL-LX5093XPGC is the designated substitute for the obsolete TLHG5205-AS21. Selection is based on the following engineering criteria:

• Active Product Status: The SSL-LX5093XPGC is an active product with current manufacturing support and inventory availability (11,164 pcs in stock), ensuring long-term component sourcing reliability.
• RoHS3 Compliance: The substitute meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant. This is significant for applications subject to environmental regulations.
• Package Compatibility: Both parts use identical T-1 3/4 (5mm) radial through-hole packages, ensuring direct PCB footprint compatibility.
• Electrical Compatibility: Forward voltage differential (2V vs. 2.2V) and test current variation (10mA vs. 20mA) fall within acceptable operating ranges for standard LED indicator circuits.
• Optical Characteristics: Both parts are green LEDs with peak wavelengths in the green spectrum (565nm vs. 555nm). The substitute features a clear lens versus the original diffused lens, resulting in a narrower viewing angle (20° vs. 28°) and slightly lower brightness (45mcd vs. 50mcd).
• Physical Fit: The substitute's reduced maximum height (8.60mm vs. 12.20mm) provides additional PCB layout flexibility.

Frequently Asked Questions (FAQ)

Q: Can the SSL-LX5093XPGC directly replace the TLHG5205-AS21 without circuit modifications?

A: Yes, for standard LED indicator applications. Both parts share the same T-1 3/4 radial through-hole package and operate within compatible voltage and current ranges. Circuit design should account for the 0.2V forward voltage increase (2V to 2.2V) and the 5mcd brightness reduction (50mcd to 45mcd) if precise optical performance is critical.

Q: What is the primary difference between the diffused and clear lens versions?

A: The TLHG5205-AS21 features a diffused lens, which scatters light over a wider viewing angle (28°) with lower peak intensity. The SSL-LX5093XPGC has a clear lens, concentrating light into a narrower viewing angle (20°) with higher directional intensity. Lens choice depends on application requirements for light distribution and visibility.

Q: Are there any compliance considerations when switching to the SSL-LX5093XPGC?

A: Yes. The substitute is ROHS3 compliant, whereas the original is RoHS non-compliant. This is advantageous for applications subject to environmental regulations. Both parts are REACH Unaffected.

Q: Does the height difference (12.20mm vs. 8.60mm) affect PCB layout?

A: The substitute is shorter, providing additional clearance in compact designs. If the original part's height was a constraint, the SSL-LX5093XPGC offers improved layout flexibility. Verify that the reduced height does not affect visual prominence in the final assembly.

Q: What is the wavelength difference between the two parts?

A: The TLHG5205-AS21 has a dominant wavelength of 569nm (peak 565nm), while the SSL-LX5093XPGC has a peak wavelength of 555nm. Both are green LEDs within the visible spectrum. The slight wavelength shift may result in a marginally different perceived green hue, though this is typically imperceptible in standard indicator applications.

Q: Is the SSL-LX5093XPGC available in diffused lens form?

A: Based on the provided specifications, the SSL-LX5093XPGC is available with a clear lens. If a diffused lens is required, alternative green LED options from Lumex or other manufacturers should be evaluated against the same substitution criteria.