Safety Relays are used to build safety circuits for equipment and facilities. Safety Relays have a forced guided mechanism that enables detecting contact welding.
There are 3 products of Safety Relays.
Compact Electromagnetic Contactors That Switch 40 A at 440 VAC
Compact, Slim Relays Conforming to EN Standards
Relays with Forcibly Guided Contacts and High Switching Capacity of 10A