TLHK4400L-PSZ Equivalent & Substitute Parts

Part Overview

The TLHK4400L-PSZ is a red diffused LED indicator manufactured by Vishay Semiconductor Opto Division, designed for through-hole mounting applications. This component operates at 1.9V forward voltage with a 70mcd brightness rating and features a 3mm T-1 lens form factor. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

TLHK4400L-PSZ

Vishay Semiconductor Opto DivisionIn Stock: 817TLHK4400L-PSZ Datasheet

Current PartRFQ

LTL-4261N

Lite-On Inc.In Stock: 785LTL-4261N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLHK4400L-PSZ is determined by the following critical parameters:

• Lens Form Factor: 3mm T-1 through-hole configuration for mechanical and electrical socket compatibility
• Color & Wavelength: Red spectrum (630-643nm dominant/peak wavelength range)
• Lens Transparency: Diffused lens type for consistent light distribution
• Mounting Type: Through-hole radial package for PCB insertion compatibility
• Voltage Compatibility: Forward voltage within acceptable operating range (1.8-1.9V nominal)
• Brightness Class: Millicandela rating suitable for indication applications (60-70mcd range)
• Regulatory Compliance: ROHS3 compliance for environmental standards

The LTL-4261N from Lite-On Inc. meets these substitution criteria as an active product alternative with compatible mechanical and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The LTL-4261N is the manufacturer-recommended substitute for the obsolete TLHK4400L-PSZ. Both components maintain ROHS3 compliance and share identical mechanical form factors (3mm through-hole radial package). The LTL-4261N is currently in active production status, ensuring long-term availability and supply chain continuity.

Design considerations for substitution include forward voltage differential (1.9V vs 1.8V) and brightness variance (70mcd vs 60mcd). The LTL-4261N exhibits a wider viewing angle (60° vs 30°) and operates at higher test current (20mA vs 10mA). These parameters remain within acceptable tolerance for standard LED indication applications.

Frequently Asked Questions (FAQ)

Q: Can the LTL-4261N directly replace the TLHK4400L-PSZ without circuit modification?

A: The LTL-4261N is mechanically and electrically compatible for through-hole socket replacement. Forward voltage difference (0.1V) is within typical LED tolerance ranges. Circuit validation is required to confirm brightness and viewing angle characteristics meet application requirements.

Q: What is the primary reason for substitution?

A: The TLHK4400L-PSZ is obsolete. The LTL-4261N is an active product from Lite-On Inc., providing guaranteed availability and supply chain support.

Q: Are there compliance differences between the two parts?

A: Both components are ROHS3 compliant. The LTL-4261N is REACH Affected, while the TLHK4400L-PSZ is REACH Unaffected. Compliance requirements depend on end-use application and regional regulations.

Q: How do brightness ratings compare?

A: The TLHK4400L-PSZ provides 70mcd at 10mA test current. The LTL-4261N provides 60mcd at 20mA test current. Actual brightness in application depends on circuit current limiting and forward voltage characteristics.

Q: What is the viewing angle impact?

A: The TLHK4400L-PSZ has a 30° viewing angle, while the LTL-4261N has a 60° viewing angle. The wider angle of the LTL-4261N provides greater light distribution but may affect brightness perception at narrow viewing angles.