intrinsic safety relies upon the equipment supplies being of low voltage and power and is suited to electronic devices the operating current of the cires should be low enoughnot to be affected by series reistance, which may be required to limit energy. the circuitry should contain low values of inductance and capacitance
supply values exceeding 30V and 1.3 W are possible though increasingly more difficult to certify
A detailed analysis of the circuit design will be undertaken . In short your circuit design will probably needto be modified to achieve certification so this protection concept is not suited to circuit boards that cannot be modified The strength and shape of the enclosureis not so important as full control and knowledge of the circuit design