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Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
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Vishay Launches New Phototriacs with Static dV/dt of 5 kV/μs, Blocking Voltages of 400 V and 600 V, and Trigger Currents as Low as 1.6 mA


For more information:
Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
E-mail:  bob.decker@redpinesgroup.com

Sales contact: 

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MALVERN, Pa. — March 24, 2006 — Vishay Intertechnology, Inc. (NYSE: VSH) is adding to its industry-leading phototriac portfolio with 12 new devices offering a static dV/dt of 5 kV/μs, a five-fold improvement over the next best devices from other suppliers. These new phototriacs give customers a selection of 58 base phototriac part numbers (excluding electrical and lead form options) that is broad enough to meet any application requirement.

The new phototriacs will be used to isolate low-voltage logic from high-voltage power mains in industrial systems running off 120-V, 240-V and 380-V ac lines. Typical applications include control of resistive, inductive, and capacitive loads, including ac motor drives, TRIAC drives, switching power supplies, programmable controllers, high-current thyristors, relays, temperature controls, and solenoid/valve controls.

The devices released today include zero-crossing (ZC) and non-zero-crossing (NZC) phototriacs, all with an isolation test voltage of 5300 VRMS and on-state current of 300 mA. Specific device options allow designers to choose from industry-low trigger currents of 1.6 mA, 2 mA or 3 mA, simplifying the interface to standard logic circuits, as well as blocking voltages of 400 V or 600 V. A proprietary dV/dt clamp results in a static dV/dt of greater than 5 kV/μs.

The new ZC VO4154 and VO4156 series phototriacs consist of a GaAs infrared LED that is optically coupled to a photosensitive ZC TRIAC detector chip. This design type helps to reduce EMI noise harmonics while featuring lower peak operating currents, making it well suited for noise-sensitive circuits. Devices in the VO4254 and VO4256 series of NZC phototriacs, on the other hand, have the advantage of being able to trigger any time during the ac phase cycle and turn off at the next zero crossing. This makes the NZC devices an ideal choice for many phase modulation applications.

The following table summarizes the characteristics of the new devices in the VO415x and VO425x phototriac optocoupler families:

Zero Crossing Part Number Non-Zero-Crossing Part Number Blocking Voltage (VDRM) Trigger Input (IFT)
VO4154D VO4254D 400 V 1.6 mA
VO4154H VO4254H 400 V 2.0 mA
VO4154M VO4254M 400 V 3.0 mA
VO4156D VO4256D 600 V 1.6 mA
VO4156H VO4256H 600 V 2.0 mA
VO4156M VO4256M 600 V 3.0 mA

The new phototriacs feature reinforced insulation per IEC60950 2.10.5.1.

Encased in the 6-pin DIP, samples of the new VO4154/6 and VO4254/6 phototriacs are available now. Production quantities have a lead-time of six to eight weeks.

Vishay Intertechnology, Inc., a Fortune 1000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay’s product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at www.vishay.com.

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For more information:
Media contact -  Bob Decker, Redpines
Phone:  1.415.409.0233 
Fax:  1.650.618.1512 
E-mail:  bob.decker@redpinesgroup.com

Sales contact: 

This release in: