Vishay Semiconductor Opto Division TLWR7900

Overview

TLWR7900 from Vishay Semiconductors is a high-flux red AlInGaP-on-GaAs LED in a 7.62 mm square TELUX package, delivering 1500–2800 mln luminous flux at 70 mA with dominant wavelength 611–634 nm and forward voltage 1.83–2.67 V. It operates from −40 °C to +110 °C and is AEC-Q101 qualified for automotive exterior lighting.

For engineers reviewing the TLWR7900 datasheet, TLWR7900 pinout, TLWR7900 application, or TLWR7900 equivalent, this page delivers verified optical, thermal, and electrical specifications - including R_thJP = 90 K/W, ±45° viewing angle, SAE/ECE red color compliance, and tube-based binning for flux/voltage/wavelength - to support automotive signal and industrial illumination design.

Technical Context

The TLWR7900 uses AlInGaP on GaAs die technology to achieve high radiant efficiency in the red spectrum (611–634 nm), with peak wavelength at 626 nm and temperature coefficient of dominant wavelength at 0.05 nm/K. Its thermal design enables operation up to 110 °C ambient via low junction-to-pin thermal resistance (90 K/W) and optimized cathode heatsink interface.

Optical performance is defined by ±45° half-intensity angle and 100° total included angle capturing 90% of flux, supporting precise light control with external reflectors or lightguides. Binning per tube ensures consistent luminous flux (1500–2800 mln), forward voltage (1.83–2.67 V), and dominant wavelength across production lots.

Key Specifications

Pinout & Package

TLWR7900 uses a 2-pin surface-mount TELUX package (7.62 mm × 7.62 mm × 5.08 mm) with cathode marked by polarity notch and solderable anode/cathode pads. The package is compatible with wave soldering (CECC 00802, J-STD-020) and features tight mechanical tolerances for repeatable optical alignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLWR7600 and OSRAM LW Q97A, the TLWR7900 uniquely combines top-bin luminous flux (up to 2800 mln), full AEC-Q101 qualification, and documented SAE/ECE red compliance - making it the only option among the three qualified for safety-critical automotive stop lamp use without additional validation.

Availability

TLWR7900 is available at Aetrix Electronics and suitable for exterior vehicle lighting, dashboard illumination, and traffic signal applications requiring stable component supply, consistent optical binning, and automotive-grade reliability.

Supply support for TLWR7900 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 for automotive, industrial, and computing markets.

The TELUX LED product line was engineered for high-flux, high-temperature automotive signaling - prioritizing luminous efficacy, color consistency, and thermal robustness in compact 7.62 mm packages.

FAQ

What is the maximum continuous forward current for TLWR7900?

The TLWR7900 is rated for 70 mA continuous forward current at ambient temperatures ≤ 85 °C. At higher ambient temperatures up to +110 °C, the device remains operational but requires current derating per Figure 1 in the Vishay datasheet (Document 83144, Rev. 2.9). This rating applies to the TLWR7900 specifically and is validated under AEC-Q101 stress conditions.

Does TLWR7900 meet SAE and ECE requirements for red automotive lighting?

Yes, the TLWR7900 meets both SAE J575 and ECE R37 requirements for red color in automotive stop and tail lamps. Its dominant wavelength range (611–634 nm) and chromaticity coordinates fall within the specified red region, as confirmed in the Vishay TELUX series compliance documentation referenced in datasheet 83144.

What does the "B" or "C" code in TLWR7900 tube labeling indicate?

The three-digit SEL code on TLWR7900 tube labels denotes binning: digit 1 = luminous flux group (e.g., "C" = 1500–2400 mln), digit 2 = dominant wavelength group (e.g., "1" = 614–622 nm), digit 3 = forward voltage group (e.g., "2" = 2.31–2.55 V). Each tube contains only one combination - ensuring optical and electrical consistency within that unit.

Can TLWR7900 be wave soldered without damage?

Yes, TLWR7900 is qualified for wave soldering per CECC 00802 and J-STD-020. It withstands 260 °C for 5 seconds at 1.5 mm from the package body, with preheat at 100 °C for 30 seconds. This process compatibility is explicitly validated for the TLWR7900 in Vishay's packaging specification (Rev. 2.9, p. 1).

Is thermal resistance R_thJP = 90 K/W measured on TLWR7900 or inferred from family data?

R_thJP = 90 K/W is a measured parameter for TLWR7900, published in the Absolute Maximum Ratings table (p. 2 of datasheet 83144). It reflects junction-to-pin thermal resistance with cathode heatsink contact, and is confirmed across production lots - not extrapolated from other TELUX variants like TLWY7900.