A micromechanical inertial power switch with locking function is designed in order to meet the requirements of power supply for fuze applications. The developed electric switch can be quickly under the preset condition within a short time. The closing process is stable and the self-locking can be realized. Thus

the power supply for fuze application is ensured to be in the on-state all the time if it is switched on in a complex trajectory environment. Under the action of normal emission acceleration of 475

1 500 gn

the switch can achieve stable locking and can keep the off-state and restore to the initial position for accidental drop accelerations in service management. By using the multi-physics coupled field software to analyze the resp

onse performance of the switch

the acceleration and closing time

with a linear relation

can be obtained. This result shows that the developed switch can close fastly when it meet the preset conditions

and closing process is stable and can realize selflocking.