Vishay Semiconductor Opto Division TLHY4405

Overview

TLHY4405 from Vishay Semiconductors is a yellow high-efficiency LED in a 3 mm tinted diffused plastic package (T-1), delivering 6.3–11 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 TLHY4405 datasheet, TLHY4405 pinout, TLHY4405 application, or TLHY4405 equivalent, key selection criteria include luminous intensity binning (Q group), forward voltage range (2.4–3.0 V at 20 mA), DC/high-peak-current capability, and compatibility with standard 3 mm through-hole mounting and automated tape-and-reel assembly.

Technical Context

The TLHY4405 uses GaAsP-on-GaP semiconductor technology to produce stable yellow emission with tight wavelength grouping (581–594 nm) and luminous intensity categorization (Q group: 6.3–12.5 mcd). Its ±30° half-intensity angle ensures wide visibility while maintaining high on-off contrast in ambient lighting.

Rated for DC and pulsed operation up to 1 A surge current (tp ≤ 10 μs), it operates across –40 °C to +100 °C ambient temperature and supports soldering at 260 °C for 5 s. Thermal resistance junction-to-ambient is 400 K/W, limiting continuous power dissipation to 100 mW at Tamb ≤ 60 °C.

Key Specifications

Pinout & Package

TLHY4405 is housed in a standard Ø 3 mm (T-1) tinted diffused plastic package with axial leads. Cathode is identified by a flat edge on the lens housing and shorter lead; anode is longer lead. No internal circuitry - two-terminal passive device.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLHY4405, TLHY4405-MS12 offers identical performance in a different packaging format, while TLHY4401 provides reduced luminous intensity for lower-power or cost-sensitive implementations - neither is pin-compatible (as both are discrete LEDs), but all share the same 3 mm T-1 mechanical footprint and polarity marking convention.

Availability

TLHY4405 is available at Aetrix Electronics and suitable for industrial control panels, medical device status interfaces, and test equipment legend illumination requiring stable component supply, consistent color matching, and long-term manufacturing continuity.

Supply support for TLHY4405 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 Semiconductors is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors.

The TLHY4405 belongs to Vishay's TLH.44.. series of standard 3 mm LEDs, designed specifically for general-purpose indicating and lighting where uniform appearance, wide viewing angle, and robust through-hole mounting are essential.

FAQ

What is the luminous intensity range of TLHY4405 at 10 mA?

The TLHY4405 delivers a luminous intensity of 6.3–11 mcd at 10 mA, corresponding to Q-group binning per Vishay's classification table. This range ensures consistent brightness across units shipped in the same packing unit, with IV_min/IV_max ≤ 0.5 within each bag. The TLHY4405 is tested using a 25 ms current pulse per specification.

What is the forward voltage range for TLHY4405 and how does it affect circuit design?

The TLHY4405 has a forward voltage range of 2.4–3.0 V at 20 mA. This directly determines the required series resistor value in constant-voltage drive configurations and influences power dissipation calculations. For example, at 5 V supply and 20 mA target current, resistor value must accommodate worst-case VF (3.0 V), yielding ~100 Ω minimum.

Does TLHY4405 support PWM dimming, and what are its peak current limits?

Yes, TLHY4405 supports PWM dimming due to its suitability for high peak current operation. Its absolute maximum surge forward current is 1 A for pulse widths ≤ 10 μs. When applying PWM, designers must ensure average power remains within 100 mW and junction temperature stays below 100 °C - verified using thermal resistance (R_thJA = 400 K/W) and ambient conditions.

How is the TLHY4405 cathode identified, and why is polarity critical?

The TLHY4405 cathode is identified by a flat edge on the lens housing and a shorter lead length. Correct polarity is critical because reverse voltage is limited to 6 V - exceeding this risks permanent degradation. In multiplexed or AC-driven applications, reverse bias protection must be included, as the TLHY4405 lacks integrated protection circuitry.

What does the "Q" in TLHY4405's luminous intensity group signify, and how does it impact production?

The "Q" denotes Vishay's luminous intensity bin: 6.3–12.5 mcd at 10 mA. Each TLHY4405 bag contains only one intensity group, ensuring no brightness mixing. This eliminates post-assembly sorting in high-volume manufacturing and guarantees uniform appearance in multi-LED arrays - a key advantage over non-binned alternatives where TLHY4405 provides predictable visual consistency.