unknown part

Hello everyone This is my first time hearing about this site and thus also posting here. I was curious if anyone knows what kind of polyswitch fuse device things the following descriptions are, they are both orange flat rectangular components with each 2 leads: - one has the marking P 30V IH33...

Hi, I found an oscillator circuit and there are two parts not identified. IC1 and IC2. The symbol looks to be Zener diodes but There is no value .Would anyone have an idea what they could be? Please see The schematic ,bottom left corner Best regards to all, Stay safe.