I need to switch off a 20V 60A DC current electronically. I don't want to use a relay, due to the environment (vibrations etc.).
It is not a switching supply, just a switch that turns everything off when given a signal.
I've been trying to design a circuit that basically passes the load current through a MOSFET which can be switched off.
I've been looking at power MOSFETs and IGBTs and am having trouble understanding their specifications. For instance this MOSFET has a Maximum Continuous Current rating of 100A, but when I look at the Safe Operating Area graph, at 20V DC it will only do around 1.5A. Similarly for other FETs and IGBTs.
Is the SOA graph what I need to be designing with, or can I use the Max current specifications?
Are there transistors made specifically for DC applications that can handle a large DC current, or am I using the wrong components/design approach here?