Jennings RP900K ceramic vacuum contactor, SPST (Normally Open)
Manufacturer's datasheet link provided: XXXXXXXXXXXXXXXXXXXXXXXXXXX/pdf/TnB_Jen_Cat__Relays&Contactors_r4.pdf (page 41)
Voltage Ratings
    Test Voltage                                                              70 KV
    Rated Voltage                                                           50 KV
Current Rating
    Continuous (Amps RMS)                                          200 Amps
    Maximum Interrupting Current (Amps)                   4000
Specifications
    Capacitor Discharge Decaying to 0 in 200 microseconds (kA)     100
    Contact Resistance (Micro Ohms)                          200
    Contact Capacity (pF)                                              5.5
    Contact Inductance (nH)                                          45
    Mechanical Life (operations)                                  100,000
    Auxiliary Contacts                                                    DPDT
    Auxiliary Contact (Volts AC RMS)                        230
    Auxiliary Contact Current (Amps RMS)                15
Options (Model-Specific)
    Contact Arrangement                                              Normally Open
    Insulator Length (in.)                                               6
    Actuator (Volts)                                                       100 VDC
   Pull-in Current (Amps)                                            1.60 DC
    Hold Current (Amps)                                               0.07 DC
   Hold Power (Watts)                                                 7.0
    Time to Close (msec)                                              40
    Break Time (msec)                                                 100
Important Dimensions
    Max Length                                                            6.12 in / 155.45 mm
    Max Width                                                              5.37 in / 136.4 mm
    Max Height                                                            21.1 in / 535.94 mm
Weight                                                                         302 oz / 8.5616 kg