Switch element comprising a liquid-crystalline medium

A switch element, that is thermoresponsive and that switches between a less transmissive state for radiant energy and a more transmissive state for radiant energy, comprising in said element a liquid-crystalline medium, which comprises one or more compounds of formula (I)

• where
• R11, R12 are on each occurrence, identically or differently, are F, Cl, CN, NCS, R1—O—CO—, R1—CO—O—, an alkyl, alkoxy or thioalkoxy group having 1 to 10 C atoms or an alkenyl, alkenyloxy or thioalkenyloxy group having 2 to 10 C atoms, where one or more H atoms in the groups mentioned above may be replaced by F or Cl, and where one or more CH2 groups in the groups mentioned above may be replaced by O, S, —O—CO— or —CO—O—;
• and where
• R1 is, identically or differently on each occurrence, an alkyl or an alkenyl group having 1 to 10 C atoms, in which one or more H atoms may be replaced by F or Cl;
• and
• are
• and
• Z11 is —CO—O— or —O—CO—,
• said liquid-crystalline medium having a clearing point lower than 50° C.