Picking the 12mm x 0.12mm CEB-12012-L100 as an example, it has pre-attached 100mm flying leads, which not all of the new parts have, and can be driven with up to 30Vp-p.
Resonant frequency is specified without leads attached, and is between 4.4 and 5.4kHz (4.9kHz typ).
Resonant impedance is 1kΩ, and operation is over -20 to +60°C.
Find the CEB-12012-L100 data sheet here
Including existing parts “these piezo elements carry rated voltages of 20 or 30Vp-p, operating temperature ranges from -30 up to 70°C, resonant frequencies from 600 to 10,500Hz and impedance ratings from 150 to 1,500 ohms,” according to the company.
