Full Description
Datasheet PDF: http://bit.ly/TDK_EPCOS_MOV
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EPCOS Metal Oxide Varistors (MOV) Unlike the fuse or circuit breaker which offers over-current protection, the varistor provides over-voltage protection by means of voltage-clamping in a similar way to the zener diode.The word “Varistor” is a combination of the words VARI-able resi-STOR used to describe their mode of operation way back in their early days of development which is a little misleading since a varistor can not be manually varied like a potentiometer or rheostat.
A MOV contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides (such as small amounts of bismuth, cobalt, manganese) sandwiched between two metal plates (the electrodes).
Maximum ratings (TA = 85 C) |
Type (untaped) SIOV | S10K320 |
Ordering code | B72210S321K103 |
VRMS V | 320 |
VDC V | 420 |
i max 8/20 s A | 2500 |
Wmax (2 ms) J | 50 |
Pmax W | 0.40 |