Ceramic ESD device uprated to rival TVS protection

June 18, 2015 // By Graham Prophet
Murata has uprated its LXES ceramic ESD protection device series by 20% compared to the peak voltage performance characteristic of previous models.

Murata’s ceramic protection devices use the gap between two electrodes as a discharge element. By narrowing the gap between the electrodes the dielectric strength of the ceramic becomes weaker when high voltages up to 8 kV are repeatedly applied. In order to overcome this weakness Murata has applied ceramic technology expertise in order to fabricate a multi-layer ceramic technology that can offer low voltage ESD protection together with the dielectric strength to withstand continued high voltage discharge. Bringing the voltage protection down by typically 20% the LXES15AAA1-153 and LXES03AAA1-154 devices bring a level of ESD protection performance that is equivalent to that of a silicon-based transient voltage suppression device (TVS) but with a ultra-low capacitance. TVS ESD protection devices – Murata asserts – are not able to achieve the performance characteristics available with these new ceramic devices.

The LXES series now offers ESD protection according to the internationally recognized IEC61000-4-2 Level 1 standard at low voltage and low peak voltage levels. They also offer superior stability characteristic when exposed to repeated ESD. The LXES15AAA1-153 is supplied in a 1005 size package and the LXES03AAA1-154 is in 0603 size. Operating temperature is across the wide range from -40 to + 85 degrees C.

Murata Electronics Europe; www.murata.com