TLHR5405-AS21 Equivalent & Substitute Parts

Part Overview

The TLHR5405-AS21 is a red diffused LED in T-1 3/4 (5mm) through-hole package manufactured by Vishay Semiconductor Opto Division. This part is classified as obsolete and carries RoHS non-compliant status. Due to its obsolete designation and regulatory non-compliance, equivalent substitute parts with active product status and RoHS3 compliance are necessary for new designs and ongoing production requirements.

Substiute Parts

TLHR5405-AS21

Vishay Semiconductor Opto DivisionIn Stock: 875TLHR5405-AS21 Datasheet

Current PartRFQ

TLHR5405

Vishay Semiconductor Opto DivisionIn Stock: 3901TLHR5405 Datasheet

Parametric EquivalentRFQ

TLUR5400

Vishay Semiconductor Opto DivisionIn Stock: 3754TLUR5400 Datasheet

Parametric EquivalentRFQ

TLUR5401

Vishay Semiconductor Opto DivisionIn Stock: 5299TLUR5401 Datasheet

Parametric EquivalentRFQ

LTL-4223

Lite-On Inc.In Stock: 2726LTL-4223 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

• Color: Red
• Lens Size: 5mm, T-1 3/4
• Lens Transparency: Diffused
• Mounting Type: Through Hole
• Voltage - Forward (Vf) (Typ): 2V
• Current - Test: 10mA
• Package / Case: Radial

Parametric equivalents maintain these core electrical and mechanical specifications. Variations in wavelength (619nm to 630nm dominant), millicandela rating (14mcd to 15mcd), and viewing angle (36° to 60°) remain within acceptable tolerance ranges for red LED indication applications. Manufacturer-recommended substitutes may include additional variations in lens color and height while preserving functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

TLHR5405 is the direct parametric equivalent with identical electrical and mechanical specifications. This Vishay part maintains active product status and ROHS3 compliance, making it the primary replacement for TLHR5405-AS21 in new designs and production transitions.

TLUR5400 and TLUR5401 are parametric equivalents with active status and ROHS3 compliance. These parts feature a dominant wavelength of 630nm (versus 619nm) and millicandela rating of 15mcd (versus 14mcd), representing minor variations within acceptable tolerance for red LED indication circuits.

LTL-4223 is a manufacturer-recommended substitute from Lite-On Inc. with active product status and ROHS3 compliance. This part exhibits a higher millicandela rating (19mcd), narrower viewing angle (36° versus 60°), and reduced maximum height (8.60mm versus 12.80mm). These differences require circuit-level evaluation for optical and thermal performance compatibility.

All substitute options provide ROHS3 compliance and active product status, eliminating obsolescence and regulatory risk associated with the original TLHR5405-AS21.

Frequently Asked Questions (FAQ)

Q: Can TLHR5405 directly replace TLHR5405-AS21?

A: Yes. TLHR5405 maintains identical electrical parameters (2V forward voltage, 10mA test current), optical specifications (619nm dominant wavelength, 14mcd, 60° viewing angle), and mechanical form factor (5mm T-1 3/4 through-hole radial package). The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What are the key differences between Vishay and Lite-On substitutes?

A: Vishay parts (TLHR5405, TLUR5400, TLUR5401) maintain the 60° viewing angle and 12.80mm maximum height of the original. The Lite-On LTL-4223 features a narrower 36° viewing angle, higher brightness (19mcd), and reduced height (8.60mm). Wavelength variations range from 619nm to 630nm across all options. Selection depends on optical beam pattern and PCB space requirements.

Q: Are all substitutes RoHS3 compliant?

A: Yes. TLHR5405, TLUR5400, TLUR5401, and LTL-4223 all carry ROHS3 Compliant status. The original TLHR5405-AS21 is RoHS non-compliant, making any of these substitutes suitable for applications requiring regulatory compliance.

Q: Do substitute parts fit the same PCB footprint?

A: TLHR5405, TLUR5400, and TLUR5401 maintain identical 5mm T-1 3/4 through-hole radial package specifications and 12.80mm maximum height, ensuring direct PCB compatibility. LTL-4223 uses the same package type but has a reduced maximum height of 8.60mm, which may affect vertical clearance in confined spaces but does not prevent installation.

Q: What wavelength variations exist among substitutes?

A: The original TLHR5405-AS21 specifies 619nm dominant wavelength. Substitutes range from 619nm (TLHR5405) to 630nm (TLUR5400, TLUR5401) to 623nm (LTL-4223). These variations fall within the red LED spectrum and are functionally equivalent for indication applications.