Vishay Semiconductor Opto Division VLMO333U2AB-GS08

Overview

VLMO333U2AB-GS08 from Vishay Semiconductors is a soft orange power SMD LED in PLCC-2 package, rated for 50 mA DC forward current, with dominant wavelength 600–611 nm, luminous intensity 560–1800 mcd at 20 mA, and forward voltage 1.8–2.6 V. It serves as a high-brightness indicator or backlighting element in automotive dashboards and traffic signage under industrial ambient conditions.

For engineers reviewing the VLMO333U2AB-GS08 datasheet, VLMO333U2AB-GS08 pinout, VLMO333U2AB-GS08 application, or VLMO333U2AB-GS08 equivalent, key selection criteria include its AEC-Q101 qualification, ±60° viewing angle, 400 K/W thermal resistance, AlInGaP-on-Si technology, and compatibility with reflow soldering per J-STD-020.

Technical Context

The VLMO333U2AB-GS08 uses AlInGaP-on-Si die technology to deliver stable soft orange emission across temperature ranges, with spectral bandwidth of 17 nm at 50% relative intensity and peak wavelength at 611 nm. Its PLCC-2 package features a white thermoplastic lead frame and clear epoxy-filled reflector for optimized light extraction.

Thermal performance is defined by junction-to-ambient thermal resistance of 400 K/W when mounted on a PCB pad >16 mm², enabling operation up to 125 °C junction temperature. The device supports JEDEC level 2a preconditioning and withstands 2 kV ESD per JESD22-A114-B.

Key Specifications

Pinout & Package

VLMO333U2AB-GS08 is housed in a surface-mount PLCC-2 package (3.5 mm × 2.8 mm × 1.75 mm), with anode and cathode terminals identified per Vishay drawing 6.541-5067.02-4. The package uses a white thermoplastic body and clear epoxy lens over a reflective cavity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VLMO333U2AB-GS08, VLMK333U2AB-GS08 shifts chromaticity toward longer wavelengths for improved red/orange differentiation, while LO T67F-U2AB-24-1 offers footprint compatibility without AEC-Q101 validation-making VLMO333U2AB-GS08 the only option meeting automotive-grade reliability and soft orange spectral targeting simultaneously.

Availability

VLMO333U2AB-GS08 is available at Aetrix Electronics and suitable for traffic signal modules, automotive dashboard indicators, and industrial control panel backlighting requiring stable component supply, consistent luminous intensity binning, and AEC-Q101-compliant manufacturing traceability.

Supply support for VLMO333U2AB-GS08 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 specializing in discrete semiconductors and passive components, with core expertise in optoelectronics, power MOSFETs, and precision resistors.

The VLMO333U2AB-GS08 belongs to Vishay's VLM.333.. power SMD LED family, engineered for high-reliability visible-light indication in automotive, transportation, and industrial environments where consistent color, thermal robustness, and solder-process compatibility are essential.

FAQ

What is the maximum continuous forward current rating for VLMO333U2AB-GS08?

The VLMO333U2AB-GS08 is rated for 50 mA DC forward current when ambient temperature does not exceed 73 °C. This limit is defined by its thermal resistance of 400 K/W and maximum junction temperature of 125 °C. At higher ambient temperatures, the permissible current must be derated per Figure 1 in the Vishay datasheet 82383. Exceeding 50 mA risks accelerated lumen depreciation and potential thermal runaway.

Does VLMO333U2AB-GS08 require current-limiting circuitry in all applications?

Yes, VLMO333U2AB-GS08 requires external current limiting-either via series resistor or constant-current driver-because it exhibits negative dynamic resistance above threshold voltage. Its forward voltage range (1.8–2.6 V at 20 mA) and exponential IV curve mean unregulated voltage sources (e.g., 3.3 V or 5 V rails) will cause unpredictable current draw and rapid degradation. Designers must calculate resistor value based on actual VF and target IF per the specific unit's bin.

Is VLMO333U2AB-GS08 compatible with lead-free reflow soldering processes?

Yes, VLMO333U2AB-GS08 is fully compatible with lead-free reflow soldering per J-STD-020, supporting peak package body temperatures up to 260 °C for ≤10 seconds. The recommended profile includes ramp-up ≤3 °C/s, preheat 150–200 °C for 60–120 s, soak 217 °C for 60–150 s, and time above liquidus (217–220 °C) of 30–60 s. Its PLCC-2 package and internal construction are qualified for this process without delamination or lens cracking.

What does the "U2AB" suffix indicate in VLMO333U2AB-GS08?

The "U2AB" suffix in VLMO333U2AB-GS08 denotes Vishay's internal brightness and color binning: "U" = luminous intensity group (560–710 mcd min), "2" = secondary intensity subgroup, "A" = dominant wavelength group (602–605 nm), and "B" = secondary wavelength subgroup (608–611 nm). This ensures units shipped on the same reel fall within tightly controlled photometric and chromatic parameters, eliminating post-production sorting.

Can VLMO333U2AB-GS08 be used in reverse-bias configurations?

No, VLMO333U2AB-GS08 is not designed for sustained reverse-bias operation. Its absolute maximum reverse voltage is 5 V, and the datasheet explicitly states reverse conduction is suitable only for short-term applications (e.g., transient protection or brief AC driving). Continuous reverse bias exceeds junction breakdown limits, causing irreversible damage to the AlInGaP die and rapid failure. Always observe polarity during PCB layout and driver design.