Telecomms thyristor offers small-format protection

Sidactor has a footprint of only 3.3 x 3.3mm and is only 1mm in height, making it the smallest protection thyristor in the telecomms protection market to provide such a high level of surge protection.

New from Littelfuse, the Q2L series C-rated Sidactor has a footprint of only 3.3 x 3.3mm and is only 1mm in height, making it the smallest protection thyristor in the telecomms protection market to provide such a high level of surge protection - boasting a surge rating of 500A 2x10ms.

Its small QFN package is ideal for dense board applications such as line cards and other multichannel telecommunications equipment.

The Q2L series C-rated Sidactor device provides exceptional bidirectional transient voltage protection and offers a wide range of Ipp ratings, including 200A for 5x310/10x700us event (ITU/YDT waveform), 100A for 10x1000us event (GR 1089 waveform) and 150A for 10x560us event (TIA-968-A).

With proven Teccor brand Sidactor technology and an innovative design, the C-rated version is truly in a class by itself.

This unique device is equipped with leads on the bottom to address the creepage and clearance requirements of UL/EN60950, providing more efficient routing of traces on the PCB.

Its low clearance also makes it possible to be used on the "back-side" of the PCB, saving space and allowing for additional board size reduction.

As an added advantage, the C-rated Sidactor device is extremely durable, delivering exceptional performance in applications exposed to the environment including remote terminals, loop extenders, wireless remote sites, repeater sites and many more.

The Q2L series C-rated Sidactor device is RoHS compliant, UL Recognised and has the surge withstand capability to comply with the co-ordination requirements of GR-1089-CORE.

It is also compliant with: GR 1089-CORE first and second level lighting surges, ITU K.20 and K.21 Basic and Enhanced lighting surges, UL/EN 60950 Impulse test conditions, YD/T 993-1998, and IEC 61000-4-5.

Best of all, when used with the TeleLink fuse, it achieves extensive compliance without requiring an additional series resistor, thereby maximising design efficiency and eliminating additional costs.

The Q2L series consists of A, B and C-rated versions.

The A and B-rated versions are suitable for applications requiring less robust protection.

compared with DO-214AA solutions, the Q2L series offers a 51% reduction in height profile (1.0 mm height on PCB).

Additionally, the A and B versions require a 54% smaller footprint and the C-rated version requires a 45% smaller footprint in comparison to the industry standard DO-214AA Sidactor device.

The savings in PCB real estate will help design engineers meet the market demand for application sise reduction and increased protection without increasing the form factor of the application.

The Q2L series features a small package, making it ideal for dense board applications such as line cards, DSLAMs, multichannel E1/T1/J1 cards and other telecommunication equipment.

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