Vishay Semiconductor Opto Division TLHP4400

Overview

TLHP4400 from Vishay Semiconductors is a high-efficiency red LED in a standard Ø 3 mm tinted diffused plastic package (T-1), designed for status indication and panel lighting. It delivers 1.6–13 mcd luminous intensity at 10 mA, with dominant wavelength 612–625 nm, forward voltage 2–3 V at 20 mA, and ±30° viewing angle.

For engineers reviewing the TLHP4400 datasheet, TLHP4400 pinout, TLHP4400 application, or TLHP4400 equivalent, this page provides verified optical/electrical specs, package geometry, real-world use cases, and validated alternative LEDs for indicator design, industrial HMI, and maintenance lighting systems.

Technical Context

The TLHP4400 uses GaAsP-on-GaP epitaxial technology to achieve stable red emission with tight wavelength binning (612–625 nm dominant) and high on-off contrast enabled by its wide ±30° half-intensity angle and tinted diffused lens. Its 3 mm T-1 package supports both DC and pulsed operation up to 1 A surge current.

Rated for -40 °C to +100 °C operating temperature and 100 mW power dissipation at ≤60 °C ambient, the device maintains luminous output across industrial environments. Junction-to-ambient thermal resistance is 400 K/W, and reverse voltage rating is 6 V - consistent with standard indicator LED reliability requirements.

Key Specifications

Pinout & Package

TLHP4400 is a two-terminal through-hole LED in a standard Ø 3 mm (T-1) plastic package with tinted diffused lens. Cathode is identified by flat side on lens housing and shorter lead; anode is longer lead. Package dimensions: Ø 3.2 ± 0.15 mm body, 4.4 ± 0.3 mm height, 3.4 ± 0.15 mm lens diameter.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLHP4400, TLHR4400 offers identical performance in all measured parameters and serves as a functionally interchangeable option, while TLHR4401 provides +7.7% typical luminous intensity - useful where enhanced visibility is prioritized over absolute minimum drive current.

Availability

TLHP4400 is available at Aetrix Electronics and suitable for industrial HMI status lights, medical device power indicators, and factory maintenance tool illumination requiring stable component supply, long-term lifecycle support, and batch-consistent optical performance.

Supply support for TLHP4400 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 leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors for industrial, automotive, and computing markets.

The TLH.44.. series was developed specifically for standard general-purpose indicating and lighting applications - emphasizing mechanical consistency, optical uniformity, and broad ambient temperature operation in cost-sensitive industrial interfaces.

FAQ

What is the forward voltage range of TLHP4400 at 20 mA?

The TLHP4400 has a forward voltage range of 2–3 V at 20 mA DC, as specified in the Vishay datasheet (Document Number: 83006, Rev. 3.8). This allows direct interface with common 3.3 V or 5 V logic supplies using a simple series current-limiting resistor. The TLHP4400's VF tolerance supports predictable power dissipation and thermal behavior in high-volume indicator designs.

Does TLHP4400 have a defined viewing angle, and how is it measured?

Yes, TLHP4400 has a ±30° angle of half intensity, meaning luminous intensity drops to 50% of peak value at 30° off-axis in both directions. This is measured at 10 mA forward current per Vishay's optical characterization procedure. The wide viewing angle ensures consistent brightness across operator viewing zones - critical for front-panel indicators in industrial control systems where TLHP4400 is commonly deployed.

Is TLHP4400 RoHS-compliant and halogen-free?

Yes, TLHP4400 complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization standards (see www.vishay.com/doc?99912). The device meets JEDEC JS-709E and IEC 61249-2-21 requirements. This compliance is confirmed in the official Vishay documentation for the TLH.44.. series, ensuring TLHP4400 is suitable for environmentally regulated industrial and medical end equipment.

What is the maximum allowable reverse voltage for TLHP4400?

The absolute maximum reverse voltage for TLHP4400 is 6 V, as stated in the Vishay "Absolute Maximum Ratings" table (Document Number: 83006). Exceeding this may cause irreversible junction damage. Designers should ensure reverse-biased conditions - such as AC coupling or multiplexed displays - remain within this limit; the TLHP4400 is not rated for sustained reverse bias beyond 6 V.

How is luminous intensity binned for TLHP4400, and why does it matter?

TLHP4400 is categorized into luminous intensity groups where IV_min/IV_max ≤ 0.5 per packing unit - meaning brightness variation within a single reel or bag is tightly controlled. This binning eliminates need for manual sorting during assembly and ensures uniform appearance across multi-LED panels. For TLHP4400, this directly supports consistent visual feedback in applications like status lights and readout indicators where human perception of relative brightness is critical.