Vishay Semiconductor Opto Division TLHE44R1S2-26

Overview

TLHE44R1S2-26 from Vishay Semiconductors is a high-intensity yellow AlInGaP LED in a 3 mm tinted diffused T-1 package, delivering 112–280 mcd luminous intensity at 20 mA, with dominant wavelength 583–594 nm and ±30° viewing angle. It serves as a status or indicator light in industrial control panels and instrumentation where uniform color and brightness are critical.

For engineers reviewing the TLHE44R1S2-26 datasheet, TLHE44R1S2-26 pinout, TLHE44R1S2-26 application, or TLHE44R1S2-26 equivalent, key selection criteria include luminous intensity binning (R/S groups), forward voltage range (1.9–2.6 V), thermal resistance (400 K/W), and compatibility with DC and pulsed drive up to 100 mA peak.

Technical Context

This device uses AlInGaP-on-GaAs epitaxy to achieve high-efficiency yellow emission with narrow dominant wavelength tolerance (±3 nm per bin). Its 3 mm diffused package provides isotropic light distribution and mechanical stability for through-hole mounting.

The LED is rated for continuous DC operation up to 30 mA at ≤60 °C ambient, with surge capability of 100 mA for ≤10 μs. Thermal resistance junction-to-ambient is 400 K/W, limiting power dissipation to 80 mW under specified conditions.

Key Specifications

Pinout & Package

Standard 2-pin through-hole Ø3 mm (T-1) package with cathode-indicating flat side and anode/cathode leads extending 34.4 ± 0.5 mm from body. Leads spaced 2.54 mm nominal (0.1 inch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLHR4400 and SML-010YBT, the TLHE44R1S2-26 uniquely combines yellow AlInGaP emission, factory-luminance binning (R/S groups), and through-hole mechanical robustness-making it optimal for industrial indicators demanding color fidelity and long-term visual consistency.

Availability

TLHE44R1S2-26 is available at Aetrix Electronics and suitable for industrial HMIs, control panel indicators, and instrumentation readouts requiring stable component supply and consistent yellow chromaticity across production batches.

Supply support for TLHE44R1S2-26 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 semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability and precision.

The TLHE44R1S2-26 belongs to Vishay's standard high-intensity LED product line, engineered for general-purpose indication where color accuracy, luminous consistency, and mechanical durability are prioritized over ultra-miniaturization.

FAQ

What is the forward voltage range for TLHE44R1S2-26 at 20 mA?

The TLHE44R1S2-26 has a forward voltage range of 1.9 V to 2.6 V at 20 mA DC. This variation reflects manufacturing tolerances in the AlInGaP-on-GaAs die and impacts series resistor selection. Designers should use the typical value (1.9 V) for initial calculations but verify margin against the maximum (2.6 V) to ensure sufficient driver headroom.

How is luminous intensity binned for TLHE44R1S2-26?

TLHE44R1S2-26 is categorized into R and S intensity groups, each subdivided into two subgroups (e.g., R1: 112–140 mcd, R2: 140–180 mcd). Each reel contains only one subgroup - no mixing occurs. This binning ensures visual uniformity when multiple TLHE44R1S2-26 LEDs are used in the same assembly, such as multi-segment status bars.

What is the dominant wavelength range and why does it matter for TLHE44R1S2-26?

The dominant wavelength for TLHE44R1S2-26 is 583–594 nm, with six defined yellow bins (Groups 2–6). This tight spectral control ensures consistent yellow hue across production lots, critical for applications like safety signage or color-coded status where deviation could miscommunicate meaning - e.g., amber vs. green perception thresholds.

Can TLHE44R1S2-26 be driven directly from a microcontroller GPIO pin?

Yes, TLHE44R1S2-26 can be driven directly from a microcontroller GPIO if limited to ≤20 mA with an appropriate series resistor and if the GPIO supports ≥2.6 V output. However, sustained 30 mA operation requires external current regulation. The device's 400 K/W thermal resistance also necessitates attention to PCB copper area and ambient temperature to avoid exceeding 100 °C junction temperature.

What is the maximum allowable reverse voltage for TLHE44R1S2-26?

The absolute maximum reverse voltage for TLHE44R1S2-26 is 5 V. Exceeding this risks junction breakdown and permanent degradation. In AC-coupled or bidirectional signal environments, designers must ensure reverse bias never exceeds this limit - typically by adding a series diode or clamping circuit, especially in shared-bus or multiplexed LED arrays.