Tyco Announces New Surge Suppression Devices For High Data Rate Telecom and Datacom Equipment
Tyco Electronics has announced the addition of new devices to its Raychem™ brand SiBar™ thyristor series. These new bi-directional 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 data rate 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, bi-directional protection in industry standard surge current families of 50A, 80A and 100A (10/1000µs). Key device parameters include voltage ranges from 6 to 400V, capacitance values as low as 12pF, maximum leakage current of only 2µA 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 telecom and datacom 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 is decreased 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 data rate circuits.
Helpful in protecting communications network equipment, including analog 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.
The devices are priced at $0.15 – $0.42 each in 10k volumes, with a delivery time of 8 – 10 weeks ARO.
