Vishay Semiconductor Opto Division TLHY6405

Overview

TLHY6405 from Vishay Semiconductors is a yellow high-efficiency LED in a 5 mm tinted diffused T-1¾ package, delivering 6.3–14 mcd luminous intensity at 10 mA, with dominant wavelength 581–594 nm and ±30° viewing angle. It serves as an on/off indicator or status light in industrial control panels requiring high contrast and uniform color appearance.

For engineers reviewing the TLHY6405 datasheet, TLHY6405 pinout, TLHY6405 application, or TLHY6405 equivalent, this page provides verified optical/electrical specs, package geometry, absolute maximum ratings, and real-world selection guidance for status indication, legend lighting, and maintenance illumination designs.

Technical Context

The TLHY6405 uses GaAsP-on-GaP semiconductor technology to produce yellow light with tightly binned dominant wavelength (581–594 nm) and luminous intensity (6.3–14 mcd), enabling consistent visual appearance across assemblies. Its ±30° half-intensity angle and tinted diffused lens ensure wide, uniform illumination without hotspots.

Rated for DC and pulsed operation up to 1 A surge current (tp ≤ 10 μs), it supports reliable operation from –40 °C to +100 °C ambient, with 350 K/W junction-to-ambient thermal resistance and 2.4 V typical forward voltage at 20 mA - optimized for low-power indicator circuits.

Key Specifications

Pinout & Package

TLHY6405 is a two-terminal through-hole LED in standard 5 mm (T-1¾) tinted diffused plastic package per DIN 46277-1. Cathode identified by flat side and shorter lead; anode by longer lead. No internal stand-offs - body sits flush on PCB surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar yellow LED indicator applications.

Compared with TLHY6401 and TLHY6400, the TLHY6405 delivers highest luminous intensity in the TLHY640x family while retaining identical package, wavelength range, and forward voltage - making it the optimal choice for applications demanding maximum visibility without design changes.

Availability

TLHY6405 is available at Aetrix Electronics and suitable for status lights, off/on indicators, and legend lighting requiring stable component supply, consistent color matching, and long-term obsolescence resilience.

Supply support for TLHY6405 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in reliability-critical optoelectronics, power management, and sensing solutions.

The TLHY6405 belongs to Vishay's standard 5 mm LED product line, engineered for general-purpose indicating and lighting where consistent photometric performance, mechanical interchangeability, and long-term supply stability are essential.

FAQ

What is the forward voltage range for TLHY6405 at 20 mA?

The TLHY6405 has a forward voltage range of 2.4 V (typical) to 3.0 V (maximum) at 20 mA DC forward current, per Vishay's Document Number 83219. This allows direct interface with common 3.3 V or 5 V supply rails using a simple series resistor. The TLHY6405's VF behavior remains stable across its operating temperature range of –40 °C to +100 °C.

Does TLHY6405 require current-limiting circuitry?

Yes, TLHY6405 requires external current limiting - typically a series resistor - because it is a passive diode device with no internal regulation. At 20 mA, its typical forward voltage is 2.4 V; for a 5 V supply, a ~130 Ω resistor achieves nominal bias. The TLHY6405's absolute maximum DC forward current is 30 mA, so proper resistor sizing prevents thermal overstress and ensures >50,000-hour lifetime.

Is TLHY6405 RoHS-compliant and halogen-free?

Yes, TLHY6405 is RoHS-compliant and halogen-free, as confirmed in Vishay's environmental documentation (www.vishay.com/doc?99912). The part carries standard Vishay environmental markings on packaging and conforms to EU Directive 2011/65/EU and IEC 61249-2-21. This makes TLHY6405 suitable for consumer, industrial, and medical products requiring full substance compliance reporting.

What does the "-ASZ" suffix mean in TLHY6405-ASZ?

The "-ASZ" suffix denotes ammopack packaging with anode-first orientation (per Vishay's nomenclature update in Rev. 2.5). TLHY6405-ASZ contains 5 × 1000 units in ammo pack format, where the anode lead exits the tape first. The base part TLHY6405 refers to bulk packaging (4000 units), while TLHY6405-ASZ is the factory-standard tape-and-reel–compatible variant used for automated assembly.

Can TLHY6405 replace older 5 mm yellow LEDs in existing designs?

Yes, TLHY6405 is mechanically and electrically compatible with standard T-1¾ 5 mm LED footprints. Its 5 mm diameter, 2.54 mm lead spacing, and ±30° viewing angle match legacy indicators. Since TLHY6405 shares identical absolute maximum ratings and forward voltage profile with other TLHY640x variants, it can directly replace lower-intensity versions like TLHY6400 or TLHY6401 without PCB or schematic modification - provided brightness requirements align.