Vishay Semiconductor Opto Division TLHK46Q1R2

Overview

TLHK46Q1R2 from Vishay Semiconductors is a high-intensity red AlInGaP-on-GaAs LED in a standard 3 mm (T-1) tinted diffused package, delivering 71–180 mcd luminous intensity at 20 mA, with dominant wavelength of 630 nm, forward voltage of 2.0–2.6 V, and ±60° viewing angle-designed for status indication and legend lighting in industrial control panels.

For engineers reviewing the TLHK46Q1R2 datasheet, TLHK46Q1R2 pinout, TLHK46Q1R2 application, or TLHK46Q1R2 equivalent, key selection criteria include luminous intensity binning (Q/R groups), DC/high-peak-current capability, thermal resistance (400 K/W), operating temperature range (−40 to +100 °C), and compatibility with through-hole assembly and manual soldering at 260 °C for ≤5 s.

Technical Context

This device uses AlInGaP epitaxial structure grown on GaAs substrate, enabling high radiance red emission with narrow spectral width and stable chromaticity over temperature. Its diffused lens and spherical dome (R1.4) produce uniform Lambertian radiation pattern with ±60° half-intensity angle.

The TLHK46Q1R2 operates within strict absolute maximum ratings: 30 mA DC forward current (T_amb ≤ 60 °C), 5 V reverse voltage, 100 °C junction temperature, and 400 K/W junction-to-ambient thermal resistance-making it suitable for ambient-temperature-variable indicator applications without active thermal management.

Key Specifications

Pinout & Package

TLHK46Q1R2 is a two-terminal through-hole LED in standard Ø3 mm (T-1) plastic package with cathode-indicating flat side and axial leads. Package dimensions comply with DIN drawing 6.544-5255.01-4: body diameter 3.2 ±0.15 mm, lead spacing 2.54 mm nominal, overall length 5.8 ±0.3 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLHR4600 and SML-P111UTT86, the TLHK46Q1R2 uniquely combines factory-luminance binning, through-hole reliability, and wide-angle visibility-making it the preferred choice for legacy panel designs requiring field-serviceable, visually uniform indicators.

Availability

TLHK46Q1R2 is available at Aetrix Electronics and suitable for industrial control panels, medical device status interfaces, and HVAC legend illumination requiring stable component supply and long-term luminance consistency.

Supply support for TLHK46Q1R2 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, founded in 1962 and headquartered in Malvern, PA, with R&D and manufacturing operations across Asia, Europe, and the Americas.

The TLHK46Q1R2 belongs to Vishay's standard 3 mm LED product line, engineered specifically for high-reliability visual indication in harsh-environment industrial and transportation equipment where long-term color stability and mechanical robustness are critical.

FAQ

What is the luminous intensity binning scheme for TLHK46Q1R2?

The TLHK46Q1R2 is categorized into Q and R luminous intensity groups: Q covers 71–112 mcd (subgroups Q1/Q2), and R covers 112–180 mcd (R1/R2). Each reel ships only one group-no mixing-to ensure visual uniformity. This binning is measured at 20 mA with ±11% accuracy and enables consistent appearance across multi-LED panels. TLHK46Q1R2 shipments adhere strictly to this grouping protocol.

Can TLHK46Q1R2 be driven with PWM for dimming?

Yes, TLHK46Q1R2 supports pulsed operation up to 100 mA peak current for ≤10 μs, making it compatible with standard microcontroller PWM dimming at frequencies ≥100 Hz. Its fast response time (<100 ns) avoids visible flicker, and the 400 K/W thermal resistance prevents junction overheating during duty cycles ≤50%. For optimal lifetime, keep average current ≤30 mA. TLHK46Q1R2 maintains stable chromaticity across PWM duty cycles.

What is the significance of the "tinted diffused" package for TLHK46Q1R2?

The tinted diffused package of TLHK46Q1R2 uses colored epoxy with internal scattering particles to achieve high on-off contrast and eliminate hot spots. The tint suppresses stray blue/green emission, enhancing red purity (630 nm dominant wavelength), while diffusion ensures uniform Lambertian output. This construction meets IEC 61000-4-2 ESD immunity requirements for indicator LEDs and improves readability under fluorescent lighting. TLHK46Q1R2's optical performance is validated per CIE 127:2007 measurement conditions.

Is TLHK46Q1R2 RoHS-compliant and halogen-free?

Yes, TLHK46Q1R2 complies with RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Material categorization follows Vishay's standard compliance framework (document #99912), confirming absence of brominated flame retardants, chlorine, and restricted phthalates. Certificate of Compliance is available upon request. TLHK46Q1R2 is rated for lead-free soldering at 260 °C for ≤5 s, fully supporting modern assembly processes.

What is the maximum allowable soldering temperature for TLHK46Q1R2?

The maximum soldering temperature for TLHK46Q1R2 is 260 °C for ≤5 seconds, measured 2 mm from the package body. This specification ensures integrity of the epoxy lens and wire bonds during manual or wave soldering. Exceeding duration or temperature risks delamination, color shift, or reduced luminous output. TLHK46Q1R2's thermal resistance (400 K/W) and lead-frame design are optimized for this profile. Always verify actual board-side temperature with thermocouple during process validation. TLHK46Q1R2 data sheet revision 1.2 confirms this limit.