Vishay Semiconductor Opto Division TLWY7900

Overview

TLWY7900 from Vishay Semiconductors is a high-flux, non-diffused yellow TELUX LED in a 7.62 mm square package using AlInGaP-on-GaAs technology, rated for 70 mA DC forward current, 1000–2800 mlm luminous flux at 70 mA, and dominant wavelength 585–597 nm - designed for automotive exterior lighting requiring stable output under high ambient temperatures up to +110 °C.

For engineers reviewing the TLWY7900 datasheet, TLWY7900 pinout, TLWY7900 application, or TLWY7900 equivalent, this part is selected for demanding visible-light signaling where color accuracy (SAE/ECE-compliant yellow), thermal robustness (RthJP = 90 K/W), and bin-controlled optical consistency are critical in motor vehicle tail/stop/turn signals and dashboard illumination.

Technical Context

The TLWY7900 operates as a surface-mount, cathode-marked, two-terminal visible-light emitter with a ±45° angle of half intensity and 100° total included angle, optimized for directional coupling with external reflectors or lightguides. Its AlInGaP-on-GaAs die delivers high radiant efficiency while maintaining tight binning across luminous flux, forward voltage, and dominant wavelength.

Thermally, it features a junction-to-pin thermal resistance of 90 K/W and supports operation from –40 °C to +110 °C ambient, with AEC-Q101 qualification confirming suitability for automotive-grade reliability. Reverse voltage rating is 10 V, and ESD withstand is 2 kV per JESD22-A114-B.

Key Specifications

Pinout & Package

TLWY7900 uses a 2-pin, surface-mount TELUX package (7.62 mm × 7.62 mm × 5.08 mm) with cathode marked by a notch and polarity indicator on the top surface. The package is RoHS-compliant, halogen-free, and wave-solder compatible per CECC 00802 and J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLWR7900 and TLWY7600, the TLWY7900 uniquely combines AEC-Q101 qualification, 585–597 nm yellow compliance, and 2800 mlm maximum luminous flux in a thermally optimized TELUX package - making it the only option among the three for high-end automotive yellow signaling with full regulatory alignment.

Availability

TLWY7900 is available at Aetrix Electronics and suitable for automotive exterior lighting, dashboard illumination, traffic signal modules, and industrial status indicators requiring stable component supply, consistent optical binning, and extended-temperature operation.

Supply support for TLWY7900 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 developed to deliver industry-leading luminous flux and thermal performance in standardized through-hole and surface-mount packages for automotive exterior lighting and high-end industrial signaling applications.

FAQ

What is the dominant wavelength range specified for TLWY7900?

The TLWY7900 has a dominant wavelength range of 585 nm to 597 nm at 70 mA, with typical value 592 nm. This range satisfies SAE and ECE requirements for yellow automotive lighting. Each production tube is binned to a specific wavelength subgroup (e.g., 587–591 nm), ensuring consistent color output across units shipped together. The TLWY7900 must be selected against this binned specification for color-critical applications.

Is TLWY7900 qualified for automotive use?

Yes, TLWY7900 is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature operating life, temperature cycling, and ESD robustness required for automotive electronics. Its operating temperature range (–40 °C to +110 °C), thermal resistance (RthJP = 90 K/W), and SAE/ECE-compliant yellow spectrum make it suitable for under-hood and exterior vehicle applications. TLWY7900 is explicitly referenced in Vishay's automotive-grade TELUX documentation.

What is the maximum continuous forward current for TLWY7900?

The absolute maximum DC forward current for TLWY7900 is 70 mA at ambient temperatures ≤ 85 °C. Exceeding this current - even briefly - risks accelerated lumen depreciation and junction overheating beyond the 125 °C limit. At higher ambient temperatures, derating is required per Fig. 1 in the datasheet. The TLWY7900 is not rated for surge currents above 1 A (10 μs pulse), and sustained operation above 70 mA voids AEC-Q101 compliance.

How is optical binning implemented for TLWY7900?

Each TLWY7900 tube contains LEDs binned to exactly one luminous flux group (e.g., B = 1000–1800 mlm), one dominant wavelength group (e.g., 1 = 587–591 nm), and one forward voltage group (e.g., Y = 1.83–2.07 V). The SEL code on the tube label encodes all three bins (e.g., "B1Y"). No mixing occurs within a tube, ensuring uniform light appearance in multi-LED arrays. TLWY7900 shipments do not include unbinned or mixed-bin material.

What package dimensions and mounting guidelines apply to TLWY7900?

TLWY7900 uses a 7.62 mm × 7.62 mm × 5.08 mm surface-mount TELUX package with cathode identified by a notch. Recommended PCB design includes a 70 mm² copper pad under the cathode for thermal management (RthJA = 200 K/W). The device is wave-solder compatible per J-STD-020 (260 °C, 5 s), and mechanical tolerances are held to ±0.3 mm to ensure repeatable optical alignment with reflectors or lightguides. The TLWY7900 footprint matches Vishay's standard TELUX land pattern.