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Well both are magnetic contractors, but safety relay used where a limit is set to switch its position for avoiding unwanted power.
We can't answer the question of which of them is better for a safety loop because in the safety loop you can use both of them, but not in the same function, i.e. you must use the safety relay to insure the safety requirement for the system and the magnetic contactor to establishing and interrupting high power components in the circuit.
the safty relay is a contactor and it can be a magnetic contactor but the safty relay is used for protection purpose only ie: we use safty relay to separate an electrique machine from the power supply when an indesirable electrique phenomenon happens like over current of over voltage passes in the circuit.
when the magnetic contactor can be used not only for protection purpose, it can be used in the control circuit of an electrique machine ie: switch the machine from doing a fonction to do other function, it depends on the user needs.
magnetic contactor is type of relay used for higher voltage level. it is used to on/off or switch supply. while safety relay is a relay used for safety purposes. safety relay has seperate operating contact and separate output supply. safety relay can only be operated when a circuit goes is fault or malfunction.
Safety Control Relays are designed to provide mechanical or mirror contact performance to meet worldwide safety standards.
