Switch with pyrotechnic actuator

A switch, comprising:

• an ignition chamber;
• a pyrotechnic actuator configured to release gas into the ignition chamber upon ignition;
• a first conductor and a second conductor, the first and second conductors comprising connection contacts;
• a third conductor moveable in a direction from a first position towards a second position upon actuation by the pyrotechnic actuator;
• and
• a breakable retaining member configured to retain the third conductor in the first position prior to actuation by the pyrotechnic actuator, the retaining member being configured to break upon actuation of the pyrotechnic actuator to allow movement of the third conductor,
• wherein, in the first position, the third conductor is arranged between, and in electrical and physical contact with, the first and second conductors to define a current conduction path,
• wherein, in the second position, the third conductor is electrically and physically separate from the first and second conductors, and
• wherein contact surfaces at which the first conductor contacts the third conductor and at which the second conductor contacts the third conductor extend generally perpendicularly to a direction of movement of the third conductor.