Vishay Semiconductor Opto Division VLMKG3400-GS08

Overview

VLMKG3400-GS08 from Vishay Semiconductors is a surface-mount bicolor LED in PLCC-4 package, integrating discrete super red (627–639 nm) and green (564–575 nm) AlInGaP-on-GaAs chips within one housing. It delivers luminous intensities of 56–140 mcd (super red) and 35.5–90 mcd (green) at 20 mA, with ±60° viewing angle and forward voltages of 1.9 V (red) and 2.0 V (green), enabling dual-color indication in space-constrained telecom and office equipment.

For engineers reviewing the VLMKG3400-GS08 datasheet, VLMKG3400-GS08 pinout, VLMKG3400-GS08 application, or VLMKG3400-GS08 equivalent, this device supports color-selectable visual feedback without external mixing optics, requires JEDEC Level 4 preconditioning, complies with J-STD-020 reflow profiles, and ships in 8 mm tape (1500 pcs/reel) with RoHS/halogen-free termination.

Technical Context

The VLMKG3400-GS08 implements two independent monolithic AlInGaP-on-GaAs die in a single white thermoplastic PLCC-4 package with non-diffused lens and internal reflector filled with clear epoxy. Each chip operates at up to 30 mA DC forward current with thermal resistance of 560 K/W (1 chip on) and junction temperature rating of 125 °C.

It features ESD withstand voltage of 2 kV (HBM, JESD22-A114-B), reverse current ≤10 μA at 5 V, junction capacitance of 15 pF, and luminous intensity ratio IV_max/IV_min ≤1.6 across brightness bins - all validated under Tamb = 25 °C per JEDEC test conditions.

Key Specifications

Pinout & Package

PLCC-4 package: 2.6 mm × 2.8 mm footprint, 1.2 mm height, white thermoplastic body with lead frame embedded in molded reflector cavity and clear epoxy lens. Non-diffused lens optimizes coupling efficiency into light pipes and edge-lit displays.

Key Features

Applications

Equivalent & Alternatives

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

Compared with OSRAM LSGT676, VLMKG3400-GS08 offers superior red/green wavelength separation and tighter luminous intensity ratio control; compared with VLMKG3400-GS18, it provides identical performance in a smaller reel format ideal for engineering validation and pilot production.

Availability

VLMKG3400-GS08 is available at Aetrix Electronics and suitable for telecom indicator panels, office equipment status lights, and LCD backlight symbols requiring stable component supply, JEDEC-compliant moisture handling, and RoHS/halogen-free compliance.

Supply support for VLMKG3400-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 leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors for industrial and automotive markets.

The VLMKG3400 series belongs to Vishay's SMD bicolor LED product line, engineered for compact visual indication in space-constrained consumer, telecom, and office equipment where dual-color status feedback and automated assembly compatibility are critical.

FAQ

What is the maximum forward current rating for each chip in the VLMKG3400-GS08?

The VLMKG3400-GS08 supports a maximum DC forward current of 30 mA per chip (red or green) at ambient temperatures ≤80 °C. This rating is defined in the Absolute Maximum Ratings table (Document #81359, p.2) and assumes proper PCB thermal pad design (>16 mm² copper area) to maintain junction temperature ≤125 °C. Exceeding 30 mA risks accelerated lumen depreciation and irreversible damage to the AlInGaP die.

Does the VLMKG3400-GS08 use a common-cathode or common-anode configuration?

The VLMKG3400-GS08 uses a common-cathode configuration: both the super red and green chips share a single cathode terminal (Pin 2), while their anodes are independent (Pin 1 for red, Pin 3 for green). This is confirmed in the PLCC-4 pinout diagram on page 7 of Document #81359 and enables straightforward dual-color control using two separate current paths with one shared return.

What is the significance of the "GS08" suffix in VLMKG3400-GS08?

The "GS08" suffix denotes the tape-and-reel packaging option: 8 mm carrier tape containing 1500 units per reel. This format complies with DIN IEC 40 (CO) 564 and is optimized for high-speed pick-and-place equipment. It differs from the GS18 variant (8000 units/reel) but shares identical optoelectrical and mechanical specifications - only the packaging quantity and reel dimensions vary.

How does the luminous intensity ratio IV_max/IV_min ≤ 1.6 impact design of VLMKG3400-GS08 applications?

The luminous intensity ratio ≤ 1.6 guarantees that the brightest and dimmest units within a given brightness bin (e.g., R1: 112–140 mcd for red) will differ by no more than 60% in output. This tight binning allows designers to set fixed current-limiting resistors across entire production batches without individual unit calibration, reducing test time and ensuring consistent perceived brightness in multi-unit panels.

Is the VLMKG3400-GS08 compatible with lead-free reflow soldering processes?

Yes, the VLMKG3400-GS08 is fully compatible with lead-free reflow soldering per J-STD-020, supporting peak package body temperatures up to 260 °C for ≤30 seconds. Its construction meets JEDEC Level 4 moisture sensitivity requirements, and the recommended profile (Fig. 19, Document #81359) specifies ramp rates ≤3 °C/s (up) and ≤6 °C/s (down), with dwell above 217 °C for 60–150 seconds.