https://www.juniper.net/documentation/us/en/hardware/mx2010/topics/concept/mx2020-hvdc240-power-circuit-breaker-requirements.html
For PDMs, if you plan to operate a maximally configured DC-powered router, we recommend that you provision at least 20 A @ 240 VDC (nominal) for each DC input...
dc powercircuit breakervchinarequirements