New SP03-3.3 SPA(TM) Silicon Protection Array Offers Low Distortion Overvoltage Protection Solution for Broadband

Littelfuse, Inc. (NASDAQ/NGS:LFUS) today announced an expansion to the SP03-x overvoltage suppression device series, designed for low distortion overvoltage protection of data lines and interface circuits in Ethernet, T3/E3, DS3, ADSL2+, and VDSL2+ systems.

The new SP03-3.3BTG is RoHS compliant, provides higher surge rating and better clamping than competing devices, and offers a multi-element design that lowers capacitive losses compared to TVS devices alone.

The SP03-x series combine a transient voltage suppression (TVS) device with a diode rectifier bridge to provide both longitudinal (common mode) and differential protection in one package, suppressing both positive and negative voltage surges.

This design results in low insertion loss and a log-linear capacitive loading characteristic with respect to the signal voltage across the device. The result is reduced intermodulation (IM) distortion compared to typical solid-state protection solutions for high-speed data lines.

A low clamping voltage for both common mode and differential surge conditions means there is less stress on the protected equipment, and more robust equipment equates to longer life. Input capacitance at 1MHz is typically 16pF (25pF max.), resulting in low attenuation and better line balance for high-speed data.

The SP03-3.3BTG has a reverse standoff voltage of 3.3V, and clamps surges to 11.5V under 50A surge current conditions (15V at 100A surge).

With peak surge rating of 150A or 3300W (8/20µs waveform), SP03-3.3BTG meets the requirements of the following standards:

Telcordia GR1089 (Intra-Building): 100A, 2/10µs waveform
ITU K.20: Ipp = 40A, 5/310µs waveform
IEC 61000-4-2 (ESD): 30kV (air), 30kV (contact)
IEC 61000-4-5 (Lightning): 100A, 8/20µs waveform


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