We are all accustomed to Tyco Kilovac contactors we use for all sorts of high voltage high current switching. We usually use a 12v 30A relay to accomplish the precharge on these systems. But those relays really aren't designed for the high pack voltages we are switching with them.
Tyco has very recently announced a relay built specifically for high voltage PRECHARGE applications in automobiles and specifically electric and hybrid automobiles for precharge applications.
Suitable for voltage levels up to 450VDC
Precharge currents up to 20A
Limiting break currents up to 20A
Rated Coil Voltage: 12vdc
Operate Voltage: 6.9vdc
Release Voltage: 1.2vdc
Coil power: 2.9 watt
Operate time: 2.5 ms
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