This part is a kind of semiconductor called ZMPT101B.

Function of this product has voltage transformer operating guide.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

ZMPT101B(ZMPT107) voltage transformer operating guide 1、Wiring diagram FigureⅠ Figure Ⅱ 2、Determination of maximum output rms voltage Umax： Umax is decided by the AD peak voltage in the sampling loop in principle. Peakvoltag e As for Bipolar AD，Umax= 2 peak voltage As for unipolar AD，Umax= 2 2 for example: As for ± 5V AD，the maximum rms voltage of the transformer: Umax = 5V / 2 =3.53V As for 0~3.3V AD，the maximum rms voltage of the transformer:V max = 3.3V / 2 2 =1.16V 3、Determination of input current-limiting resistor R′ Current-limiting resistor R′= V I V：Rated input voltage I ： Rated operating current （ when Coil resistance is compared with current-limiting resistor R′ , it can be ignored.） ZMPT101B/ZMPT107 usually working at rated current: [ ... ]

ZMPT101B PDF Datasheet Download