Help identifying PJ2089 DZK
Summary: I suspect it's a Panjit 8.55V bi-directional TVS diode - see page 2 on this datasheet. (Panjit range P6SMB or similar.)
Reasoning:

That package type is common for various types of diodes. Measurements could help with a specific package identification (see datasheet page 1).

PJ as part of the top marking - Panjit Semiconductor perhaps?

2089 in the top marking - not mentioned on the datasheet above, but batch number, manufacturing location and/or date codes are typical explanations with other manufacturers.

Z1/Z2 component designators on the PCB are typically used for zener or TVS diodes. The component has no cathode marking, so it isn't a zener diode or other polarised diode, or a uni-directional TVS. However a bi-directional TVS would match a component like that in the photo, with no polarity marking.

DKZ in the top marking - this matches a bi-directional TVS diode (therefore consistent with the point above) with an 8.55 V reverse stand-off voltage, from Panjit.