Product category:
Circuit Protection Devices
News Release from: Raychem Circuit Protection | Subject: SiBar thyristors
Edited by the Electronicstalk Editorial
Team on 11 December 2007
Thyristors provide fast bidirectional
protection
Devices help protect sensitive equipment from damage resulting from overvoltage events and operate as shunt devices in response to a surge that exceeds the breakover voltage.
The latest additions to the Raychem SiBar thyristor series are bidirectional transient voltage surge suppressors include an expanded range of available voltages, and lower capacitance to help protect high-speed ADSL/VDSL modems, Ethernet and power-over-Ethernet and other high-datarate communications equipment from damage from overvoltage events Compliant with major standards such as GR-1089 Core, ITU K.20/K.21, IEC61000-4-5, FCC part 68, and UL60950, the new SiBar thyristors provide fast, bidirectional protection in industry standard surge current families of 50, 80 and 100A (10/1000us)
This article was originally published on Electronicstalk on 25 Apr 2001 at 8.00am (UK)
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Key device parameters include voltage ranges from 6 to 400V, capacitance values as low as 12pF, maximum leakage current of only 2uA and a minimum hold current of 150mA.
The devices are housed in surface-mount SMB (JEDEC DO-214AA) and SMA (JEDEC DO-214AC) package options.
SiBar thyristors help protect sensitive telecomms and datacomms equipment from damage resulting from overvoltage events, including lightning transients, and operate as shunt devices in response to a surge that exceeds the breakover voltage.
When the voltage exceeds the breakover voltage the SiBar device "folds back", creating a low-impedance path, effectively shorting out the overvoltage condition.
The SiBar device remains in this low-impedance state until the current through the device decreases below its hold rating.
After an overvoltage event has passed, it resets to its high-impedance state and allows for normal system operation.
In addition to resettable functionality, SiBar devices offer a small form factor, low on-state power dissipation, and accurate foldback voltage shunting.
The new low-capacitance offering also makes these devices suitable for high datarate circuits.
Helpful in protecting communications network equipment, including analogue and digital linecards, xDSL and ISDN modems, set-top boxes, T1 equipment and voice over IP (VoIP) equipment, the RoHS-compliant devices are compatible with lead-free solders and high-volume assembly processes.
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