Circuit & System Protection


Steering diode/TVS arrays

21 March 2018 Circuit & System Protection

ProTek Devices has added two steering diode/transient voltage suppressor (TVS) arrays that provide circuit protection for a wide variety of applications, such as telecommunications interfaces, computing interfaces, video cards and more. One of the new devices can also be used to guard against electromagnetic interference/radio frequency interference.

The PLR4045 provides ultra-low capacitance of 1,6 pF while delivering circuit protection for critical applications. These applications include 2.5GBASE-T, T1/E1 and T3/E3 chip-side protection, DVI interfaces and USB 2.0 interfaces. It is rated at 600 Watts peak pulse power (8/20 microseconds waveform). It is compatible with IEC standards 61000-4-2 (ESD): air ±15 kV, contact ±8 kV; 61000-4-4 (EFT); and 61000-4-5 (surge).

At higher operating frequencies, or faster edge rates, insertion loss and signal integrity are a major concern. The PLR4045, in conjunction with passive components integrated into a TVS/filter network, can be used for EMI/RFI protection. ESD protection is > 25 kV. The device also offers unidirectional configuration, a low clamping voltage of 20 V at IPPM = 30 A, and protects four I/O ports and a power supply.

The PSRV2.8-2LC is an addition to the PSRV-2LC series of low-capacitance (1 pF typical) steering diode /TVS arrays, and offers a 2,8 V rated standoff voltage. The component is ideal for circuit protection in Ethernet 10/100/1000 Base T, USB, handheld electronics, video cards, WAN/LAN and similar equipment. This series is designed to protect two line pair or four data/transmission lines from the effects of ESD and EFT.

The PSRV2.8-2LC is ideal for low-voltage circuit applications and the low capacitance of the steering diode allows the designer to protect high-speed data applications. This device is compatible with IEC standards 61000-4-2 (ESD): air: ±15 kV, contact: ±8 kV; 61000-4-4 (EFT): 40 A - 5/50 ns; and 61000-4-5 (surge): 24 A, 8/20 microseconds, level 2 (LineGnd) and level 3 (Line-Line). It features 300 Watts peak pulse power per line (typical = 8/20 microseconds), and provides two lines of protection and low leakage current of less than 1,0 μA. Other rated standoff voltages in the series include 3,3 V and 5 V. The leakage current for the 3,3 V device is less than 1,0 μA.

For more information contact Jeva Narian, Arrow Altech Distribution, +27 (0)11 923 9600, jnarian@arrow.altech.co.za, www.arrow.altech.co.za



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