Electrical Isolators

Optocouplers provide off-line control of ac voltages up to 380 V.
Electrical Isolators

Optocouplers provide off-line control of ac voltages up to 380 V.

Non-zero-crossing 1.5 kV/Â-µs dv/dt phototriac optocouplers consist of GaAs infrared LED optically coupled to monolithic photosensitive zero-crossing triac detector chip. Rated with 600 V blocking voltage, units provide isolation between dc and ac voltages on 120 and 240 Vac lines. Model VO3053 requires maximum trigger current of 5 mA to latch output, and VO3052 requires maximum current of 10...

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Electrical Isolators

New Thermal Models for Vishay Optocoupler Products Reduce Design Time

Vishay Is the First Optocoupler and Solid-State Relay Manufacturer to Provide Detailed Thermal Data for New Devices with Greater than 200 mW Total Power Dissipation MALVERN, PENNSYLVANIA December 6, 2006 Vishay Intertechnology, Inc. (NYSE: VSH) today announced that it is now providing detailed thermal characteristics for newly released optocouplers and solid-state relays (SSRs) that have total...

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Data Converters feature protective optical isolation.
Electrical Isolators

Data Converters feature protective optical isolation.

Available for RS-232 and RS-422/485 data circuits, I-linx stand-alone optical isolators in industrial DIN rail mount cases offer 2,000 V protection. Converters change RS-232 format data signals to RS-422 for increased range, or RS-485 for increased range and multi-drop capability. Model FOSTCDRI converts RS-232, RS-422, or RS-485 to transmit over fiber optic cable, which allows range up to 2.5...

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Electrical Isolators

Phototriacs offer static dV/dt of 5 kV/s.

Zero-Crossing and Non-Zero-Crossing Phototriacs isolate low-voltage logic from high-voltage power mains in industrial systems running off 120, 240, and 380 Vac lines. All models feature isolation test voltage of 5,300 Vrms and on-state current of 300 mA. Designers can choose from trigger currents of 1.6, 2, or 3 mA, simplying interface to logic circuits, as well as blocking voltages of 400 or 600...

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Electrical Isolators

Phototriac Optocouplers provide dV/dt greater than 5 kV/-µs.

Encased in 6-pin DIP package, zero-crossing Series VO4157 and VO4158 consist of GaAs infrared LED that is optically coupled to photosensitive ZC TRIAC detector chip, minimizing EMI noise harmonics. Non-zero-crossing Series VO4257 and VO4258 can trigger any time during ac phase cycle and turn off at next zero crossing. Both families have trigger currents of 1.6 mA and are suited for switching ac...

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Phototriacs provide off-line control of AC voltages.
Electrical Isolators

Phototriacs provide off-line control of AC voltages.

Consisting of GaAs infrared LED that is optically coupled to monolithic photosensitive zero crossing triac detector chip, 1.5 kV/s dV/dt Models VO3062 and VO3063 isolate low-voltage logic from ac voltages up to 380 V. Model VO3063 requires max trigger current of 5 mA to latch output, while Model VO3062 requires 10 mA. Rated with 600 V blocking voltage, phototriacs can provide isolation between dc...

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Optocouplers provide 1 kV isolation.
Electrical Isolators

Optocouplers provide 1 kV isolation.

Surface mountable on ceramic or printed circuit board, Series HCC240 and HCC242 consist of GaAlAs LED and silicon phototransistor in hermetically sealed, leadless chip carrier. When coupled, Series HCC240 exhibits on-state collector current of 6.0 mA typical, while Series HCC242 is 15.0 mA typical. With collector-emitter saturation voltage of 0.30 V max, both devices are compatible with soldering...

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Optocoupler Driver prevents overshoot in power supplies.
Electrical Isolators

Optocoupler Driver prevents overshoot in power supplies.

Housed in SOT-23 package, LT4430 incorporates error amplifier with 9 MHz bandwidth that minimizes phase shift, while ground referenced optocoupler drive eliminates secondary feedback path. Product has 3-20 V input supply range and inverting optocoupler driver that supplies up to 10 mA. Overshoot control circuit provides independent control of startup and short-circuit recovery characteristics...

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Isolators protect process equipment and power input devices.
Electrical Isolators

Isolators protect process equipment and power input devices.

AC/DC-powered 630T Series isolators and signal splitters feature internal excitation supply to drive up to two 2-wire transmitters or other input loop devices. Multi-channel isolators provide space-efficient solution to eliminate ground loops, filter signal noise, and block high voltage surges. Measuring 1 in. wide, single/dual-channel isolators receive 4-20 mA inputs and provide fully isolated...

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Optical Isolator provides total transmittance of 80%.
Electrical Isolators

Optical Isolator provides total transmittance of 80%.

Faraday Optical Isolator allows propagation of linearly polarized light in one direction, but blocks light in reverse direction. It consists of Faraday rotator, 2 polarizers, and housing body. Rotator's magneto-optical rod is cut from glass with parallelism better than 10 arc-sec. Isolator is offered with reverse isolation of 38 dB or 60 dB and is factory aligned for central wavelength of 800 nm....

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