Warning Buzzer & Chime
The long foot is positive and the short foot is negative
There is a gap in the middle of the split body, which is not heat .
No gap, high temperature (TMB12A03 / TMB12A05 / TMB12A12)
It rings when the electricity is on.
The feet are about 7.6MM apart.
Buzzer active DC 3V(red label)-5V(blue label)-12V(black label)
TMB12A03 / TMB12A05 / TMB12A12
12X9.5MM 3V/5V/12V