The Siemens 5SY5132-6CC12 is a 1-pole miniature circuit breaker from the 5SY5 series, rated B32 curve with a 220V DC breaking capacity of 10kA. This is a current-production part, actively available through the authorized channel.
The B32 trip curve means the magnetic release trips at 3 to 5 times rated current (96 A to 160 A), suited for resistive and moderate inductive loads where inrush is not extreme. The single-pole form factor fits standard DIN-rail distribution boards; verify that your DC system is ungrounded or that the pole is placed in the ungrounded conductor per local code.