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PCB size is 18 x 18 mm. You can buy all the parts and the PCB using Kitspace.
On the front side there is only the sensor itself while all the other parts are on the back. This ensures good optical contact and light-tight sealing. The unused SiPM pin number 4 is connected to the ground pad for some thermal mass.
The PCB includes the recommended SiPM biasing that is optional to use. Enable it by closing the solder jumper
JP1 and then soldering wires to the
GND pin respectively. The SiPM signal will be anode
If you are connecting straight to the SiPM, do so via the cathode
C and anode
A pads and open the jumper